Changelogx fix for 2.18.0 c/cpp breaking changes

.bazelrc

@@ -24,7 +24,5 @@ common --registry=file:///%workspace%/misc/bazel/registry
 common --registry=https://bcr.bazel.build
 
 common --@rules_dotnet//dotnet/settings:strict_deps=false
-common --experimental_isolated_extension_usages
-common --incompatible_use_plus_in_repo_names
 
 try-import %workspace%/local.bazelrc

.bazelrc.internal

@@ -8,4 +8,3 @@ common --registry=https://bcr.bazel.build
 # its implementation packages without providing any code itself.
 # We either can depend on internal implementation details, or turn of strict deps.
 common --@rules_dotnet//dotnet/settings:strict_deps=false
-common --experimental_isolated_extension_usages

.bazelversion

@@ -1 +1 @@
-5f5d70b6c4d2fb1a889479569107f1692239e8a7
+7.2.1

.github/labeler.yml

@@ -30,10 +30,6 @@ Ruby:
   - ruby/**/*
   - change-notes/**/*ruby*
 
-Rust:
-  - rust/**/*
-  - change-notes/**/*rust*
-
 Swift:
   - swift/**/*
   - change-notes/**/*swift*

.github/pull_request_template.md

@@ -1,14 +0,0 @@
-### Pull Request checklist
-
-#### All query authors
-
-- [ ] A change note is added if necessary. See [the documentation](https://github.com/github/codeql/blob/main/docs/change-notes.md) in this repository.
-- [ ] All new queries have appropriate `.qhelp`. See [the documentation](https://github.com/github/codeql/blob/main/docs/query-help-style-guide.md) in this repository.
-- [ ] QL tests are added if necessary. See [Testing custom queries](https://docs.github.com/en/code-security/codeql-cli/using-the-advanced-functionality-of-the-codeql-cli/testing-custom-queries) in the GitHub documentation.
-- [ ] New and changed queries have correct query metadata. See [the documentation](https://github.com/github/codeql/blob/main/docs/query-metadata-style-guide.md) in this repository.
-
-#### Internal query authors only
-
-- [ ] Autofixes generated based on these changes are valid, only needed if this PR makes significant changes to `.ql`, `.qll`, or `.qhelp` files. See [the documentation](https://github.com/github/codeql-team/blob/main/docs/best-practices/validating-autofix-for-query-changes.md) (internal access required).
-- [ ] Changes are validated [at scale](https://github.com/github/codeql-dca/) (internal access required).
-- [ ] Adding a new query? Consider also [adding the query to autofix](https://github.com/github/codeml-autofix/blob/main/docs/updating-query-support.md#adding-a-new-query-to-the-query-suite).

.github/workflows/buildifier.yml

@@ -24,5 +24,5 @@ jobs:
           extra_args: >
             buildifier --all-files 2>&1 ||
             (
-              echo -e "In order to format all bazel files, please run:\n  bazel run //misc/bazel/buildifier"; exit 1
+              echo -e "In order to format all bazel files, please run:\n  bazel run //misc/bazel:buildifier"; exit 1
             )

.github/workflows/check-change-note.yml

@@ -16,12 +16,11 @@ on:
       - "shared/**/*.qll"
       - "!**/experimental/**"
       - "!ql/**"
-      - "!rust/**"
       - ".github/workflows/check-change-note.yml"
 
 jobs:
   check-change-note:
-    env:
+    env: 
       REPO: ${{ github.repository }}
       PULL_REQUEST_NUMBER: ${{ github.event.number }}
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -34,7 +33,7 @@ jobs:
           !contains(github.event.pull_request.labels.*.name, 'no-change-note-required')
         run: |
           change_note_files=$(gh api "repos/$REPO/pulls/$PULL_REQUEST_NUMBER/files" --paginate --jq '.[].filename | select(test("/change-notes/.*[.]md$"))')
-
+          
           if [ -z "$change_note_files" ]; then
             echo "No change note found. Either add one, or add the 'no-change-note-required' label."
             exit 1

.github/workflows/cpp-swift-analysis.yml

@@ -37,7 +37,7 @@ jobs:
       with:
         languages: cpp
         config-file: ./.github/codeql/codeql-config.yml
-
+  
     - name: "[Ubuntu] Remove GCC 13 from runner image"
       shell: bash
       run: |
@@ -48,7 +48,7 @@ jobs:
     - name: "Build Swift extractor using Bazel"
       run: |
         bazel clean --expunge
-        bazel run //swift:create-extractor-pack --nouse_action_cache --noremote_accept_cached --noremote_upload_local_results --spawn_strategy=local
+        bazel run //swift:create-extractor-pack --nouse_action_cache --noremote_accept_cached --noremote_upload_local_results --spawn_strategy=local --features=-layering_check
         bazel shutdown
 
     - name: Perform CodeQL Analysis

.github/workflows/csharp-qltest.yml

@@ -29,6 +29,45 @@ permissions:
   contents: read
 
 jobs:
+  qlupgrade:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/actions/fetch-codeql
+      - name: Check DB upgrade scripts
+        run: |
+          echo >empty.trap
+          codeql dataset import -S ql/lib/upgrades/initial/semmlecode.csharp.dbscheme testdb empty.trap
+          codeql dataset upgrade testdb --additional-packs ql/lib
+          diff -q testdb/semmlecode.csharp.dbscheme ql/lib/semmlecode.csharp.dbscheme
+      - name: Check DB downgrade scripts
+        run: |
+          echo >empty.trap
+          rm -rf testdb; codeql dataset import -S ql/lib/semmlecode.csharp.dbscheme testdb empty.trap
+          codeql resolve upgrades --format=lines --allow-downgrades --additional-packs downgrades \
+           --dbscheme=ql/lib/semmlecode.csharp.dbscheme --target-dbscheme=downgrades/initial/semmlecode.csharp.dbscheme |
+           xargs codeql execute upgrades testdb
+          diff -q testdb/semmlecode.csharp.dbscheme downgrades/initial/semmlecode.csharp.dbscheme
+  qltest:
+    if: github.repository_owner == 'github'
+    runs-on: ubuntu-latest-xl
+    strategy:
+      fail-fast: false
+      matrix:
+        slice: ["1/2", "2/2"]
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./csharp/actions/create-extractor-pack
+      - name: Cache compilation cache
+        id: query-cache
+        uses: ./.github/actions/cache-query-compilation
+        with:
+          key: csharp-qltest-${{ matrix.slice }}
+      - name: Run QL tests
+        run: |
+          codeql test run --threads=0 --ram 50000 --slice ${{ matrix.slice }} --search-path "${{ github.workspace }}" --check-databases --check-undefined-labels --check-repeated-labels --check-redefined-labels --consistency-queries ql/consistency-queries ql/test --compilation-cache "${{ steps.query-cache.outputs.cache-dir }}"
+        env:
+          GITHUB_TOKEN: ${{ github.token }}
   unit-tests:
     strategy:
       matrix:

.github/workflows/go-tests.yml

@@ -3,7 +3,6 @@ on:
   push:
     paths:
       - "go/**"
-      - "shared/**"
       - .github/workflows/go-tests.yml
       - .github/actions/**
       - codeql-workspace.yml
@@ -13,7 +12,6 @@ on:
   pull_request:
     paths:
       - "go/**"
-      - "shared/**"
       - .github/workflows/go-tests.yml
       - .github/actions/**
       - codeql-workspace.yml

.github/workflows/ruby-build.yml

@@ -65,8 +65,8 @@ jobs:
         id: cache-extractor
         with:
           path: |
-            target/release/codeql-extractor-ruby
-            target/release/codeql-extractor-ruby.exe
+            ruby/extractor/target/release/codeql-extractor-ruby
+            ruby/extractor/target/release/codeql-extractor-ruby.exe
             ruby/extractor/ql/lib/codeql/ruby/ast/internal/TreeSitter.qll
           key: ${{ runner.os }}-${{ steps.os_version.outputs.version }}-ruby-extractor-${{ hashFiles('ruby/extractor/rust-toolchain.toml', 'ruby/extractor/Cargo.lock') }}-${{ hashFiles('shared/tree-sitter-extractor') }}-${{ hashFiles('ruby/extractor/**/*.rs') }}
       - uses: actions/cache@v3
@@ -75,7 +75,7 @@ jobs:
           path: |
             ~/.cargo/registry
             ~/.cargo/git
-            target
+            ruby/target
           key: ${{ runner.os }}-${{ steps.os_version.outputs.version }}-ruby-rust-cargo-${{ hashFiles('ruby/extractor/rust-toolchain.toml', 'ruby/extractor/**/Cargo.lock') }}
       - name: Check formatting
         if: steps.cache-extractor.outputs.cache-hit != 'true'
@@ -91,7 +91,7 @@ jobs:
         run: cd extractor && cargo build --release
       - name: Generate dbscheme
         if: ${{ matrix.os == 'ubuntu-latest' && steps.cache-extractor.outputs.cache-hit != 'true'}}
-        run: ../target/release/codeql-extractor-ruby generate --dbscheme ql/lib/ruby.dbscheme --library ql/lib/codeql/ruby/ast/internal/TreeSitter.qll
+        run: extractor/target/release/codeql-extractor-ruby generate --dbscheme ql/lib/ruby.dbscheme --library ql/lib/codeql/ruby/ast/internal/TreeSitter.qll
       - uses: actions/upload-artifact@v3
         if: ${{ matrix.os == 'ubuntu-latest' }}
         with:
@@ -106,8 +106,8 @@ jobs:
         with:
           name: extractor-${{ matrix.os }}
           path: |
-            target/release/codeql-extractor-ruby
-            target/release/codeql-extractor-ruby.exe
+            ruby/extractor/target/release/codeql-extractor-ruby
+            ruby/extractor/target/release/codeql-extractor-ruby.exe
           retention-days: 1
   compile-queries:
     if: github.repository_owner == 'github'
@@ -140,7 +140,6 @@ jobs:
           path: |
             ${{ runner.temp }}/query-packs/*
           retention-days: 1
-          include-hidden-files: true
 
   package:
     runs-on: ubuntu-latest
@@ -177,7 +176,6 @@ jobs:
           name: codeql-ruby-pack
           path: ruby/codeql-ruby.zip
           retention-days: 1
-          include-hidden-files: true
       - uses: actions/download-artifact@v3
         with:
           name: codeql-ruby-queries
@@ -195,7 +193,6 @@ jobs:
           name: codeql-ruby-bundle
           path: ruby/codeql-ruby-bundle.zip
           retention-days: 1
-          include-hidden-files: true
 
   test:
     defaults:

.github/workflows/rust.yml

@@ -1,58 +0,0 @@
-name: "Rust"
-
-on:
-  pull_request:
-    paths:
-      - "rust/**"
-      - "misc/bazel/**"
-      - "misc/codegen/**"
-      - "shared/**"
-      - "MODULE.bazel"
-      - .github/workflows/rust.yml
-      - .github/actions/**
-      - codeql-workspace.yml
-      - "!**/*.md"
-      - "!**/*.qhelp"
-    branches:
-      - rust-experiment
-      - main
-      - rc/*
-      - codeql-cli-*
-
-permissions:
-  contents: read
-
-jobs:
-  rust-code:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Format
-        working-directory: rust/extractor
-        shell: bash
-        run: |
-          cargo fmt --check
-      - name: Compilation
-        working-directory: rust/extractor
-        shell: bash
-        run: cargo check
-      - name: Clippy
-        working-directory: rust/extractor
-        shell: bash
-        run: |
-          cargo clippy --fix
-          git diff --exit-code
-  rust-codegen:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Install CodeQL
-        uses: ./.github/actions/fetch-codeql
-      - name: Code generation
-        shell: bash
-        run: |
-          bazel run //rust/codegen
-          git add .
-          git diff --exit-code HEAD

.gitignore

@@ -7,8 +7,8 @@
 .cache
 
 # qltest projects and artifacts
-*.actual
 */ql/test/**/*.testproj
+*/ql/test/**/*.actual
 */ql/test/**/go.sum
 
 # Visual studio temporaries, except a file used by QL4VS
@@ -65,9 +65,3 @@ node_modules/
 
 # bazel-built in-tree extractor packs
 /*/extractor-pack
-
-# Jetbrains IDE files
-.idea
-
-# cargo build directory
-/target

.pre-commit-config.yaml

@@ -5,9 +5,9 @@ repos:
     rev: v3.2.0
     hooks:
       - id: trailing-whitespace
-        exclude: /test/.*$(?<!\.qlref)|.*\.patch$|.*\.qll?$
+        exclude: /test/.*$(?<!\.ql)(?<!\.qll)(?<!\.qlref)|.*\.patch
       - id: end-of-file-fixer
-        exclude: /test/.*$(?<!\.qlref)|.*\.patch$|.*\.qll?$
+        exclude: /test/.*$(?<!\.ql)(?<!\.qll)(?<!\.qlref)|.*\.patch
 
   - repo: https://github.com/pre-commit/mirrors-clang-format
     rev: v17.0.6
@@ -15,7 +15,7 @@ repos:
       - id: clang-format
 
   - repo: https://github.com/pre-commit/mirrors-autopep8
-    rev: v2.0.4
+    rev: v1.6.0
     hooks:
       - id: autopep8
         files: ^misc/codegen/.*\.py
@@ -26,7 +26,7 @@ repos:
         name: Format bazel files
         files: \.(bazel|bzl)
         language: system
-        entry: bazel run //misc/bazel/buildifier
+        entry: bazel run //misc/bazel:buildifier
         pass_filenames: false
 
 #      DISABLED: can be enabled by copying this config and installing `pre-commit` with `--config` on the copy
@@ -45,7 +45,7 @@ repos:
 
       - id: sync-files
         name: Fix files required to be identical
-        files: \.(qll?|qhelp|swift|toml)$|^config/identical-files\.json$
+        files: \.(qll?|qhelp|swift)$|^config/identical-files\.json$
         language: system
         entry: python3 config/sync-files.py --latest
         pass_filenames: false
@@ -58,7 +58,7 @@ repos:
 
       - id: swift-codegen
         name: Run Swift checked in code generation
-        files: ^misc/codegen/|^swift/(schema.py$|codegen/|.*/generated/|ql/lib/(swift\.dbscheme$|codeql/swift/elements)|ql/\.generated.list)
+        files: ^swift/(schema.py$|codegen/|.*/generated/|ql/lib/(swift\.dbscheme$|codeql/swift/elements)|ql/\.generated.list)
         language: system
         entry: bazel run //swift/codegen -- --quiet
         pass_filenames: false
@@ -69,17 +69,3 @@ repos:
         language: system
         entry: bazel test //misc/codegen/test
         pass_filenames: false
-
-      - id: rust-codegen
-        name: Run Rust checked in code generation
-        files: ^misc/codegen/|^rust/(schema.py$|codegen/|.*/generated/|ql/lib/(rust\.dbscheme$|codeql/rust/elements)|\.generated.list)
-        language: system
-        entry: bazel run //rust/codegen -- --quiet
-        pass_filenames: false
-
-      - id: rust-lint
-        name: Run fmt and clippy on Rust code
-        files: ^rust/extractor/(.*rs|Cargo.toml)$
-        language: system
-        entry: python3 rust/lint.py
-        pass_filenames: false

Cargo.toml

@@ -1,16 +0,0 @@
-# This is the shared workspace file for extractor using shared/tree-sitter/extractor
-[workspace]
-
-resolver = "2"
-members = [
-    "shared/tree-sitter-extractor",
-    "ruby/extractor",
-    "rust/extractor",
-    "rust/extractor/macros",
-    "rust/ast-generator",
-]
-
-[patch.crates-io]
-# patch for build script bug preventing bazel build
-# see https://github.com/rust-lang/rustc_apfloat/pull/17
-rustc_apfloat = { git = "https://github.com/redsun82/rustc_apfloat.git", rev = "096d585100636bc2e9f09d7eefec38c5b334d47b" }

MODULE.bazel

@@ -1,7 +1,6 @@
 module(
-    name = "ql",
+    name = "codeql",
     version = "0.0",
-    repo_name = "codeql",
 )
 
 # this points to our internal repository when `codeql` is checked out as a submodule thereof
@@ -15,29 +14,27 @@ local_path_override(
 # see https://registry.bazel.build/ for a list of available packages
 
 bazel_dep(name = "platforms", version = "0.0.10")
-bazel_dep(name = "rules_go", version = "0.50.0")
-bazel_dep(name = "rules_pkg", version = "1.0.1")
+bazel_dep(name = "rules_go", version = "0.48.0")
+bazel_dep(name = "rules_pkg", version = "0.10.1")
 bazel_dep(name = "rules_nodejs", version = "6.2.0-codeql.1")
-bazel_dep(name = "rules_python", version = "0.35.0")
+bazel_dep(name = "rules_python", version = "0.32.2")
 bazel_dep(name = "bazel_skylib", version = "1.6.1")
 bazel_dep(name = "abseil-cpp", version = "20240116.0", repo_name = "absl")
 bazel_dep(name = "nlohmann_json", version = "3.11.3", repo_name = "json")
 bazel_dep(name = "fmt", version = "10.0.0")
-bazel_dep(name = "rules_kotlin", version = "2.0.0-codeql.1")
-bazel_dep(name = "gazelle", version = "0.38.0")
+bazel_dep(name = "rules_kotlin", version = "1.9.4-codeql.1")
+bazel_dep(name = "gazelle", version = "0.37.0")
 bazel_dep(name = "rules_dotnet", version = "0.15.1")
 bazel_dep(name = "googletest", version = "1.14.0.bcr.1")
-bazel_dep(name = "rules_rust", version = "0.52.2")
+bazel_dep(name = "rules_rust", version = "0.46.0")
 
 bazel_dep(name = "buildifier_prebuilt", version = "6.4.0", dev_dependency = True)
 
-# crate_py but shortened due to Windows file path considerations
-cp = use_extension(
+crate = use_extension(
     "@rules_rust//crate_universe:extension.bzl",
     "crate",
-    isolate = True,
 )
-cp.from_cargo(
+crate.from_cargo(
     name = "py_deps",
     cargo_lockfile = "//python/extractor/tsg-python:Cargo.lock",
     manifests = [
@@ -45,27 +42,15 @@ cp.from_cargo(
         "//python/extractor/tsg-python/tsp:Cargo.toml",
     ],
 )
-use_repo(cp, "py_deps")
-
-# deps for ruby+rust, but shortened due to windows file paths
-r = use_extension(
-    "@rules_rust//crate_universe:extension.bzl",
-    "crate",
-    isolate = True,
-)
-r.from_cargo(
-    name = "r",
-    cargo_lockfile = "//:Cargo.lock",
+crate.from_cargo(
+    name = "ruby_deps",
+    cargo_lockfile = "//ruby/extractor:Cargo.lock",
     manifests = [
-        "//:Cargo.toml",
         "//ruby/extractor:Cargo.toml",
-        "//rust/extractor:Cargo.toml",
-        "//rust/extractor/macros:Cargo.toml",
-        "//rust/ast-generator:Cargo.toml",
-        "//shared/tree-sitter-extractor:Cargo.toml",
+        "//ruby/extractor/codeql-extractor-fake-crate:Cargo.toml",
     ],
 )
-use_repo(r, tree_sitter_extractors_deps = "r")
+use_repo(crate, "py_deps", "ruby_deps")
 
 dotnet = use_extension("@rules_dotnet//dotnet:extensions.bzl", "dotnet")
 dotnet.toolchain(dotnet_version = "8.0.101")
@@ -128,7 +113,6 @@ use_repo(
     "kotlin-compiler-1.9.20-Beta",
     "kotlin-compiler-2.0.0-RC1",
     "kotlin-compiler-2.0.20-Beta2",
-    "kotlin-compiler-2.1.0-Beta1",
     "kotlin-compiler-embeddable-1.5.0",
     "kotlin-compiler-embeddable-1.5.10",
     "kotlin-compiler-embeddable-1.5.20",
@@ -142,7 +126,6 @@ use_repo(
     "kotlin-compiler-embeddable-1.9.20-Beta",
     "kotlin-compiler-embeddable-2.0.0-RC1",
     "kotlin-compiler-embeddable-2.0.20-Beta2",
-    "kotlin-compiler-embeddable-2.1.0-Beta1",
     "kotlin-stdlib-1.5.0",
     "kotlin-stdlib-1.5.10",
     "kotlin-stdlib-1.5.20",
@@ -156,11 +139,10 @@ use_repo(
     "kotlin-stdlib-1.9.20-Beta",
     "kotlin-stdlib-2.0.0-RC1",
     "kotlin-stdlib-2.0.20-Beta2",
-    "kotlin-stdlib-2.1.0-Beta1",
 )
 
 go_sdk = use_extension("@rules_go//go:extensions.bzl", "go_sdk")
-go_sdk.download(version = "1.23.1")
+go_sdk.download(version = "1.22.2")
 
 go_deps = use_extension("@gazelle//:extensions.bzl", "go_deps")
 go_deps.from_file(go_mod = "//go/extractor:go.mod")

config/identical-files.json

@@ -57,6 +57,10 @@
     "java/ql/lib/semmle/code/java/dataflow/internal/rangeanalysis/SsaReadPositionCommon.qll",
     "csharp/ql/lib/semmle/code/csharp/dataflow/internal/rangeanalysis/SsaReadPositionCommon.qll"
   ],
+  "Model as Data Generation Java/C# - CaptureModels": [
+    "java/ql/src/utils/modelgenerator/internal/CaptureModels.qll",
+    "csharp/ql/src/utils/modelgenerator/internal/CaptureModels.qll"
+  ],
   "Sign Java/C#": [
     "java/ql/lib/semmle/code/java/dataflow/internal/rangeanalysis/Sign.qll",
     "csharp/ql/lib/semmle/code/csharp/dataflow/internal/rangeanalysis/Sign.qll"
@@ -352,8 +356,8 @@
     "python/ql/test/library-tests/dataflow/model-summaries/InlineTaintTest.ext.yml",
     "python/ql/test/library-tests/dataflow/model-summaries/NormalDataflowTest.ext.yml"
   ],
-  "Diagnostics.qll": [
-    "ruby/ql/lib/codeql/ruby/Diagnostics.qll",
-    "rust/ql/lib/codeql/rust/Diagnostics.qll"
+  "shared tree-sitter extractor cargo.toml": [
+    "shared/tree-sitter-extractor/Cargo.toml",
+    "ruby/extractor/codeql-extractor-fake-crate/Cargo.toml"
   ]
 }

cpp/downgrades/02a123a1a681f98cf502f189a2a79b0dfb398e59/exprs.ql

@@ -1,17 +0,0 @@
-class Expr extends @expr {
-  string toString() { none() }
-}
-
-class Location extends @location_expr {
-  string toString() { none() }
-}
-
-predicate isExprWithNewBuiltin(Expr expr) {
-  exists(int kind | exprs(expr, kind, _) | 385 <= kind and kind <= 388)
-}
-
-from Expr expr, int kind, int kind_new, Location location
-where
-  exprs(expr, kind, location) and
-  if isExprWithNewBuiltin(expr) then kind_new = 1 else kind_new = kind
-select expr, kind_new, location

cpp/downgrades/02a123a1a681f98cf502f189a2a79b0dfb398e59/sizeof_bind.ql

@@ -1,14 +0,0 @@
-class Expr extends @expr {
-  string toString() { none() }
-}
-
-class Type extends @type {
-  string toString() { none() }
-}
-
-from Expr expr, Type type, int kind
-where
-  sizeof_bind(expr, type) and
-  exprs(expr, kind, _) and
-  (kind = 93 or kind = 94)
-select expr, type

cpp/downgrades/02a123a1a681f98cf502f189a2a79b0dfb398e59/upgrade.properties

@@ -1,4 +0,0 @@
-description: Add new builtin operations
-compatibility: partial
-exprs.rel: run exprs.qlo
-sizeof_bind.rel: run sizeof_bind.qlo

cpp/downgrades/0fea0ee7026c7c3f7d6faef4df4bf67847b67d71/downgrades.ql

@@ -1,32 +0,0 @@
-/*
- * Approach: replace conversion expressions of kind 389 (= @c11_generic) by
- * conversion expressions of kind 12 (= @parexpr), i.e., a `ParenthesisExpr`,
- * and drop the relation which its child expressions, which are just syntactic
- * sugar. Parenthesis expressions are equally benign as C11 _Generic expressions,
- * and behave similarly in the context of the IR.
- */
-
-class Expr extends @expr {
-  string toString() { none() }
-}
-
-class Location extends @location {
-  string toString() { none() }
-}
-
-class ExprParent extends @exprparent {
-  string toString() { none() }
-}
-
-query predicate new_exprs(Expr expr, int new_kind, Location loc) {
-  exists(int kind | exprs(expr, kind, loc) | if kind = 389 then new_kind = 12 else new_kind = kind)
-}
-
-query predicate new_exprparents(Expr expr, int index, ExprParent expr_parent) {
-  exprparents(expr, index, expr_parent) and
-  (
-    not expr_parent instanceof @expr
-    or
-    exists(int kind | exprs(expr_parent.(Expr), kind, _) | kind != 389)
-  )
-}

cpp/downgrades/0fea0ee7026c7c3f7d6faef4df4bf67847b67d71/upgrade.properties

@@ -1,4 +0,0 @@
-description: Expose C11 _Generics
-compatibility: partial
-exprs.rel: run downgrades.ql new_exprs
-exprparents.rel: run downgrades.ql new_exprparents

cpp/downgrades/68930f3b81bbe3fdbb91c850deca1fec8072d62a/upgrade.properties

@@ -1,3 +0,0 @@
-description: description: Support explicit(bool) specifiers
-compatibility: full
-explicit_specifier_exprs.rel: delete

cpp/downgrades/6f5d51e89e762fe4609fd4ac8ee3afb04221e873/exprs.ql

@@ -1,15 +0,0 @@
-class Expr extends @expr {
-  string toString() { none() }
-}
-
-class Location extends @location_expr {
-  string toString() { none() }
-}
-
-predicate isExprRequires(Expr expr) { exists(int kind | exprs(expr, kind, _) | kind = 390) }
-
-from Expr expr, int kind, int kind_new, Location location
-where
-  exprs(expr, kind, location) and
-  if isExprRequires(expr) then kind_new = 1 else kind_new = kind
-select expr, kind_new, location

cpp/downgrades/6f5d51e89e762fe4609fd4ac8ee3afb04221e873/upgrade.properties

@@ -1,3 +0,0 @@
-description: Add requires expr
-compatibility: partial
-exprs.rel: run exprs.qlo

cpp/downgrades/7ff6a6e53dbcff09d1b9b758b594bc6d17366863/coroutine.ql

@@ -1,18 +0,0 @@
-class Function extends @function {
-  string toString() { none() }
-}
-
-class Type extends @type {
-  string toString() { none() }
-}
-
-class Variable extends @variable {
-  string toString() { none() }
-}
-
-from Function func, Type traits, Variable handle, Variable promise
-where
-  coroutine(func, traits) and
-  coroutine_placeholder_variable(handle, 1, func) and
-  coroutine_placeholder_variable(promise, 2, func)
-select func, traits, handle, promise

cpp/downgrades/7ff6a6e53dbcff09d1b9b758b594bc6d17366863/upgrade.properties

@@ -1,4 +0,0 @@
-description: Improve handling of coroutine placeholder variables
-compatibility: full
-coroutine.rel: run coroutine.qlo
-coroutine_placeholder_variable.rel: delete

cpp/downgrades/e197626a6ebccd052d5c891975fccf8aebcc9803/upgrade.properties

@@ -1,3 +0,0 @@
-description: Add relation between deduction guides and class templates
-compatibility: full
-deduction_guide_for_class.rel: delete

cpp/downgrades/e51fad7a2436caefab0c6bd52f05e28e7cce4d92/exprs.ql

@@ -1,17 +0,0 @@
-class Expr extends @expr {
-  string toString() { none() }
-}
-
-class Location extends @location_expr {
-  string toString() { none() }
-}
-
-predicate isExprRequirement(Expr expr) {
-  exists(int kind | exprs(expr, kind, _) | kind = [391, 392, 393])
-}
-
-from Expr expr, int kind, int kind_new, Location location
-where
-  exprs(expr, kind, location) and
-  if isExprRequirement(expr) then kind_new = 1 else kind_new = kind
-select expr, kind_new, location

cpp/downgrades/e51fad7a2436caefab0c6bd52f05e28e7cce4d92/params.ql

@@ -1,17 +0,0 @@
-class Parameter extends @parameter {
-  string toString() { none() }
-}
-
-class ParameterizedElement extends @parameterized_element {
-  string toString() { none() }
-}
-
-class Type extends @type {
-  string toString() { none() }
-}
-
-from Parameter param, ParameterizedElement pe, int index, Type type
-where
-  params(param, pe, index, type) and
-  not pe instanceof @requires_expr
-select param, pe, index, type

cpp/downgrades/e51fad7a2436caefab0c6bd52f05e28e7cce4d92/upgrade.properties

@@ -1,5 +0,0 @@
-description: Support C++20 requires expressions
-compatibility: partial
-compound_requirement_is_noexcept.rel: delete
-exprs.rel: run exprs.qlo
-params.rel: run params.qlo

cpp/ql/lib/CHANGELOG.md

@@ -1,61 +1,3 @@
-## 2.0.2
-
-### Minor Analysis Improvements
-
-* Added taint flow model for `fopen` and related functions.
-* The `SimpleRangeAnalysis` library (`semmle.code.cpp.rangeanalysis.SimpleRangeAnalysis`) now generates more precise ranges for calls to `fgetc` and `getc`.
-
-## 2.0.1
-
-No user-facing changes.
-
-## 2.0.0
-
-### Breaking Changes
-
-* Deleted many deprecated taint-tracking configurations based on `TaintTracking::Configuration`. 
-* Deleted many deprecated dataflow configurations based on `DataFlow::Configuration`. 
-* Deleted the deprecated `hasQualifiedName` and `isDefined` predicates from the `Declaration` class, use `hasGlobalName` and `hasDefinition` respectively instead.
-* Deleted the `getFullSignature` predicate from the `Function` class, use `getIdentityString(Declaration)` from `semmle.code.cpp.Print` instead.
-* Deleted the deprecated `freeCall` predicate from `Alloc.qll`. Use `DeallocationExpr` instead.
-* Deleted the deprecated `explorationLimit` predicate from `DataFlow::Configuration`, use `FlowExploration<explorationLimit>` instead.
-* Deleted the deprecated `getFieldExpr` predicate from `ClassAggregateLiteral`, use `getAFieldExpr` instead.
-* Deleted the deprecated `getElementExpr` predicate from `ArrayOrVectorAggregateLiteral`, use `getAnElementExpr` instead.
-
-### New Features
-
-* Added a class `C11GenericExpr` to represent C11 generic selection expressions. The generic selection is represented as a `Conversion` on the expression that will be selected.
-* Added subclasses of `BuiltInOperations` for the `__is_scoped_enum`, `__is_trivially_equality_comparable`, and `__is_trivially_relocatable` builtin operations.
-* Added a subclass of `Expr` for `__datasizeof` expressions.
-
-### Minor Analysis Improvements
-
-* Added a data flow model for `swap` member functions, which were previously modeled as taint tracking functions. This change improves the precision of queries where flow through `swap` member functions might affect the results.
-* Added a data flow model for `realloc`-like functions, which were previously modeled as a taint tracking functions. This change improves the precision of queries where flow through `realloc`-like functions might affect the results.
-
-## 1.4.2
-
-No user-facing changes.
-
-## 1.4.1
-
-No user-facing changes.
-
-## 1.4.0
-
-### New Features
-
-* A `getTemplateClass` predicate was added to the `DeductionGuide` class to get the class template for which the deduction guide is a guide.
-* An `isExplicit` predicate was added to the `Function` class that determines whether the function was declared as explicit.
-* A `getExplicitExpr` predicate was added to the `Function` class that yields the constant boolean expression (if any) that conditionally determines whether the function is explicit.
-* A `isDestroyingDeleteDeallocation` predicate was added to the `NewOrNewArrayExpr` and `DeleteOrDeleteArrayExpr` classes to indicate whether the deallocation function is a destroying delete. 
-
-### Minor Analysis Improvements
-
-* The controlling expression of a `constexpr if` is now always recognized as an unevaluated expression.
-* Improved performance of alias analysis of large function bodies. In rare cases, alerts that depend on alias analysis of large function bodies may be affected.
-* A `UsingEnumDeclarationEntry` class has been added for C++ `using enum` declarations. As part of this, synthesized `UsingDeclarationEntry`s are no longer emitted for individual enumerators of the referenced enumeration.
-
 ## 1.3.0
 
 ### New Features

cpp/ql/lib/change-notes/2014-10-11-requires-expressions.md

@@ -1,4 +0,0 @@
----
-category: feature
----
-* Added classes `RequiresExpr`, `SimpleRequirementExpr`, `TypeRequirementExpr`, `CompoundRequirementExpr`, and `NestedRequirementExpr` to represent C++20 requires expressions and the simple, type, compound, and nested requirements that can occur in `requires` expressions.

cpp/ql/lib/change-notes/2024-07-23-using-enum-declaration copy.md

@@ -0,0 +1,4 @@
+---
+category: feature
+---
+* A `isDestroyingDeleteDeallocation` predicate was added to the `NewOrNewArrayExpr` and `DeleteOrDeleteArrayExpr` classes to indicate whether the deallocation function is a destroying delete. 

cpp/ql/lib/change-notes/2024-07-23-using-enum-declaration.md

@@ -0,0 +1,4 @@
+---
+category: minorAnalysis
+---
+* A `UsingEnumDeclarationEntry` class has been added for C++ `using enum` declarations. As part of this, synthesized `UsingDeclarationEntry`s are no longer emitted for individual enumerators of the referenced enumeration.

cpp/ql/lib/change-notes/2024-07-25-alias-analysis-perf.md

@@ -0,0 +1,4 @@
+---
+category: minorAnalysis
+---
+* Improved performance of alias analysis of large function bodies. In rare cases, alerts that depend on alias analysis of large function bodies may be affected.

cpp/ql/lib/change-notes/2024-10-16-function-pointer-resolution.md

@@ -1,4 +0,0 @@
----
-category: minorAnalysis
----
-* The function call target resolution algorithm has been improved to resolve more calls through function pointers. As a result, dataflow queries may have more results.

cpp/ql/lib/change-notes/2024-10-16-new-api-for-call-target-resolution.md

@@ -1,4 +0,0 @@
----
-category: feature
----
-* Added a new predicate `DataFlow::getARuntimeTarget` for getting a function that may be invoked by a `Call` expression. Unlike `Call.getTarget` this new predicate may also resolve function pointers.

cpp/ql/lib/change-notes/released/1.4.0.md

@@ -1,14 +0,0 @@
-## 1.4.0
-
-### New Features
-
-* A `getTemplateClass` predicate was added to the `DeductionGuide` class to get the class template for which the deduction guide is a guide.
-* An `isExplicit` predicate was added to the `Function` class that determines whether the function was declared as explicit.
-* A `getExplicitExpr` predicate was added to the `Function` class that yields the constant boolean expression (if any) that conditionally determines whether the function is explicit.
-* A `isDestroyingDeleteDeallocation` predicate was added to the `NewOrNewArrayExpr` and `DeleteOrDeleteArrayExpr` classes to indicate whether the deallocation function is a destroying delete. 
-
-### Minor Analysis Improvements
-
-* The controlling expression of a `constexpr if` is now always recognized as an unevaluated expression.
-* Improved performance of alias analysis of large function bodies. In rare cases, alerts that depend on alias analysis of large function bodies may be affected.
-* A `UsingEnumDeclarationEntry` class has been added for C++ `using enum` declarations. As part of this, synthesized `UsingDeclarationEntry`s are no longer emitted for individual enumerators of the referenced enumeration.

cpp/ql/lib/change-notes/released/1.4.1.md

@@ -1,3 +0,0 @@
-## 1.4.1
-
-No user-facing changes.

cpp/ql/lib/change-notes/released/1.4.2.md

@@ -1,3 +0,0 @@
-## 1.4.2
-
-No user-facing changes.

cpp/ql/lib/change-notes/released/2.0.0.md

@@ -1,23 +0,0 @@
-## 2.0.0
-
-### Breaking Changes
-
-* Deleted many deprecated taint-tracking configurations based on `TaintTracking::Configuration`. 
-* Deleted many deprecated dataflow configurations based on `DataFlow::Configuration`. 
-* Deleted the deprecated `hasQualifiedName` and `isDefined` predicates from the `Declaration` class, use `hasGlobalName` and `hasDefinition` respectively instead.
-* Deleted the `getFullSignature` predicate from the `Function` class, use `getIdentityString(Declaration)` from `semmle.code.cpp.Print` instead.
-* Deleted the deprecated `freeCall` predicate from `Alloc.qll`. Use `DeallocationExpr` instead.
-* Deleted the deprecated `explorationLimit` predicate from `DataFlow::Configuration`, use `FlowExploration<explorationLimit>` instead.
-* Deleted the deprecated `getFieldExpr` predicate from `ClassAggregateLiteral`, use `getAFieldExpr` instead.
-* Deleted the deprecated `getElementExpr` predicate from `ArrayOrVectorAggregateLiteral`, use `getAnElementExpr` instead.
-
-### New Features
-
-* Added a class `C11GenericExpr` to represent C11 generic selection expressions. The generic selection is represented as a `Conversion` on the expression that will be selected.
-* Added subclasses of `BuiltInOperations` for the `__is_scoped_enum`, `__is_trivially_equality_comparable`, and `__is_trivially_relocatable` builtin operations.
-* Added a subclass of `Expr` for `__datasizeof` expressions.
-
-### Minor Analysis Improvements
-
-* Added a data flow model for `swap` member functions, which were previously modeled as taint tracking functions. This change improves the precision of queries where flow through `swap` member functions might affect the results.
-* Added a data flow model for `realloc`-like functions, which were previously modeled as a taint tracking functions. This change improves the precision of queries where flow through `realloc`-like functions might affect the results.

cpp/ql/lib/change-notes/released/2.0.1.md

@@ -1,3 +0,0 @@
-## 2.0.1
-
-No user-facing changes.

cpp/ql/lib/change-notes/released/2.0.2.md

@@ -1,6 +0,0 @@
-## 2.0.2
-
-### Minor Analysis Improvements
-
-* Added taint flow model for `fopen` and related functions.
-* The `SimpleRangeAnalysis` library (`semmle.code.cpp.rangeanalysis.SimpleRangeAnalysis`) now generates more precise ranges for calls to `fgetc` and `getc`.

cpp/ql/lib/codeql-pack.release.yml

@@ -1,2 +1,2 @@
 ---
-lastReleaseVersion: 2.0.2
+lastReleaseVersion: 1.3.0

cpp/ql/lib/cpp.qll

@@ -17,7 +17,6 @@ import semmle.code.cpp.File
 import semmle.code.cpp.Linkage
 import semmle.code.cpp.Location
 import semmle.code.cpp.Compilation
-import semmle.code.cpp.Concept
 import semmle.code.cpp.Element
 import semmle.code.cpp.Namespace
 import semmle.code.cpp.Specifier

cpp/ql/lib/experimental/semmle/code/cpp/security/PrivateCleartextWrite.qll

@@ -36,6 +36,16 @@ module PrivateCleartextWrite {
     }
   }
 
+  deprecated class WriteConfig extends TaintTracking::Configuration {
+    WriteConfig() { this = "Write configuration" }
+
+    override predicate isSource(DataFlow::Node source) { source instanceof Source }
+
+    override predicate isSink(DataFlow::Node sink) { sink instanceof Sink }
+
+    override predicate isSanitizer(DataFlow::Node node) { node instanceof Sanitizer }
+  }
+
   private module WriteConfig implements DataFlow::ConfigSig {
     predicate isSource(DataFlow::Node source) { source instanceof Source }
 

cpp/ql/lib/ext/std.format.model.yml

@@ -1,14 +0,0 @@
-extensions:
-  - addsTo:
-      pack: codeql/cpp-all
-      extensible: summaryModel
-    data: # namespace, type, subtypes, name, signature, ext, input, output, kind, provenance
-      - ["std", "", False, "format<Args>", "(format_string,Args &&)", "", "Argument[0]", "ReturnValue", "taint", "manual"]
-      - ["std", "", False, "format<Args>", "(format_string,Args &&)", "", "Argument[*1]", "ReturnValue", "taint", "manual"]
-      - ["std", "", False, "format<Args>", "(format_string,Args &&)", "", "Argument[*2]", "ReturnValue", "taint", "manual"]
-      - ["std", "", False, "format<Args>", "(format_string,Args &&)", "", "Argument[*3]", "ReturnValue", "taint", "manual"]
-      - ["std", "", False, "format<Args>", "(format_string,Args &&)", "", "Argument[*4]", "ReturnValue", "taint", "manual"]
-      - ["std", "", False, "format<Args>", "(format_string,Args &&)", "", "Argument[*5]", "ReturnValue", "taint", "manual"]
-      - ["std", "", False, "format<Args>", "(format_string,Args &&)", "", "Argument[*6]", "ReturnValue", "taint", "manual"]
-      - ["std", "", False, "format<Args>", "(format_string,Args &&)", "", "Argument[*7]", "ReturnValue", "taint", "manual"]
-      - ["std", "", False, "format<Args>", "(format_string,Args &&)", "", "Argument[*8]", "ReturnValue", "taint", "manual"]

cpp/ql/lib/qlpack.yml

@@ -1,5 +1,5 @@
 name: codeql/cpp-all
-version: 2.0.3-dev
+version: 1.3.1-dev
 groups: cpp
 dbscheme: semmlecode.cpp.dbscheme
 extractor: cpp

cpp/ql/lib/semmle/code/cpp/Concept.qll

@@ -1,161 +0,0 @@
-/**
- * Provides classes for working with C++ concepts.
- */
-
-import semmle.code.cpp.exprs.Expr
-
-/**
- * A C++ requires expression.
- *
- * For example, with `T` and `U` template parameters:
- * ```cpp
- * requires (T x, U y) { x + y; };
- * ```
- */
-class RequiresExpr extends Expr, @requires_expr {
-  override string toString() {
-    if exists(this.getAParameter())
-    then result = "requires(...) { ... }"
-    else result = "requires { ... }"
-  }
-
-  override string getAPrimaryQlClass() { result = "RequiresExpr" }
-
-  /**
-   * Gets a requirement in this requires expression.
-   */
-  RequirementExpr getARequirement() { result = this.getAChild() }
-
-  /**
-   * Gets the nth requirement in this requires expression.
-   */
-  RequirementExpr getRequirement(int n) { result = this.getChild(n) }
-
-  /**
-   * Gets the number of requirements in this requires expression.
-   */
-  int getNumberOfRequirements() { result = count(this.getARequirement()) }
-
-  /**
-   * Gets a parameter of this requires expression, if any.
-   */
-  Parameter getAParameter() { result.getRequiresExpr() = underlyingElement(this) }
-
-  /**
-   * Gets the the nth parameter of this requires expression.
-   */
-  Parameter getParameter(int n) {
-    result.getRequiresExpr() = underlyingElement(this) and result.getIndex() = n
-  }
-
-  /**
-   * Gets the number of parameters of this requires expression.
-   */
-  int getNumberOfParameters() { result = count(this.getAParameter()) }
-}
-
-/**
- * A C++ requirement in a requires expression.
- */
-class RequirementExpr extends Expr { }
-
-/**
- * A C++ simple requirement in a requires expression.
- *
- * For example, if:
- * ```cpp
- * requires(T x, U y) { x + y; };
- * ```
- * with `T` and `U` template parameters, then `x + y;` is a simple requirement.
- */
-class SimpleRequirementExpr extends RequirementExpr {
-  SimpleRequirementExpr() {
-    this.getParent() instanceof RequiresExpr and
-    not this instanceof TypeRequirementExpr and
-    not this instanceof CompoundRequirementExpr and
-    not this instanceof NestedRequirementExpr
-  }
-
-  override string getAPrimaryQlClass() { result = "SimpleRequirementExpr" }
-}
-
-/**
- * A C++ type requirement in a requires expression.
- *
- * For example, if:
- * ```cpp
- * requires { typename T::a_field; };
- * ```
- * with `T` a template parameter, then `typename T::a_field;` is a type requirement.
- */
-class TypeRequirementExpr extends RequirementExpr, TypeName {
-  TypeRequirementExpr() { this.getParent() instanceof RequiresExpr }
-
-  override string getAPrimaryQlClass() { result = "TypeRequirementExpr" }
-}
-
-/**
- * A C++ compound requirement in a requires expression.
- *
- * For example, if:
- * ```cpp
- * requires(T x) { { x } noexcept -> std::same_as<int>; };
- * ```
- * with `T` a template parameter, then `{ x } noexcept -> std::same_as<int>;` is
- * a compound requirement.
- */
-class CompoundRequirementExpr extends RequirementExpr, @compound_requirement {
-  override string toString() {
-    if exists(this.getReturnTypeRequirement())
-    then result = "{ ... } -> ..."
-    else result = "{ ... }"
-  }
-
-  override string getAPrimaryQlClass() { result = "CompoundRequirementExpr" }
-
-  /**
-   * Gets the expression from the compound requirement.
-   */
-  Expr getExpr() { result = this.getChild(0) }
-
-  /**
-   * Gets the return type requirement from the compound requirement, if any.
-   */
-  Expr getReturnTypeRequirement() { result = this.getChild(1) }
-
-  /**
-   * Holds if the expression from the compound requirement must not be
-   * potentially throwing.
-   */
-  predicate isNoExcept() { compound_requirement_is_noexcept(underlyingElement(this)) }
-}
-
-/**
- * A C++ nested requirement in a requires expression.
- *
- * For example, if:
- * ```cpp
- * requires { requires std::is_same<T, int>::value; };
- * ```
- * with `T` a template parameter, then `requires std::is_same<T, int>::value;` is
- * a nested requirement.
- */
-class NestedRequirementExpr extends Expr, @nested_requirement {
-  override string toString() { result = "requires ..." }
-
-  override string getAPrimaryQlClass() { result = "NestedRequirementExpr" }
-
-  /**
-   * Gets the constraint from the nested requirement.
-   */
-  Expr getConstraint() { result = this.getChild(0) }
-}
-
-/**
- * A C++ concept id expression.
- */
-class ConceptIdExpr extends RequirementExpr, @concept_id {
-  override string toString() { result = "concept<...>" }
-
-  override string getAPrimaryQlClass() { result = "ConceptIdExpr" }
-}

cpp/ql/lib/semmle/code/cpp/Declaration.qll

@@ -60,6 +60,18 @@ class Declaration extends Locatable, @declaration {
    */
   string getQualifiedName() { result = underlyingElement(this).(Q::Declaration).getQualifiedName() }
 
+  /**
+   * DEPRECATED: Prefer `hasGlobalName` or the 2-argument or 3-argument
+   * `hasQualifiedName` predicates. To get the exact same results as this
+   * predicate in all edge cases, use `getQualifiedName()`.
+   *
+   * Holds if this declaration has the fully-qualified name `qualifiedName`.
+   * See `getQualifiedName`.
+   */
+  deprecated predicate hasQualifiedName(string qualifiedName) {
+    this.getQualifiedName() = qualifiedName
+  }
+
   /**
    * Holds if this declaration has a fully-qualified name with a name-space
    * component of `namespaceQualifier`, a declaring type of `typeQualifier`,
@@ -173,6 +185,9 @@ class Declaration extends Locatable, @declaration {
   /** Holds if the declaration has a definition. */
   predicate hasDefinition() { exists(this.getDefinition()) }
 
+  /** DEPRECATED: Use `hasDefinition` instead. */
+  deprecated predicate isDefined() { this.hasDefinition() }
+
   /** Gets the preferred location of this declaration, if any. */
   override Location getLocation() { none() }
 

cpp/ql/lib/semmle/code/cpp/Element.qll

@@ -129,7 +129,7 @@ class Element extends ElementBase {
    * or certain kinds of `Statement`.
    */
   Element getParentScope() {
-    // result instanceof Class
+    // result instanceof class
     exists(Declaration m |
       m = this and
       result = m.getDeclaringType() and
@@ -138,40 +138,31 @@ class Element extends ElementBase {
     or
     exists(TemplateClass tc | this = tc.getATemplateArgument() and result = tc)
     or
-    // result instanceof Namespace
+    // result instanceof namespace
     exists(Namespace n | result = n and n.getADeclaration() = this)
     or
     exists(FriendDecl d, Namespace n | this = d and n.getADeclaration() = d and result = n)
     or
     exists(Namespace n | this = n and result = n.getParentNamespace())
     or
-    // result instanceof Stmt
+    // result instanceof stmt
     exists(LocalVariable v |
       this = v and
       exists(DeclStmt ds | ds.getADeclaration() = v and result = ds.getParent())
     )
     or
-    exists(Parameter p |
-      this = p and
-      (
-        result = p.getFunction() or
-        result = p.getCatchBlock().getParent().(Handler).getParent().(TryStmt).getParent() or
-        result = p.getRequiresExpr().getEnclosingStmt().getParent()
-      )
-    )
+    exists(Parameter p | this = p and result = p.getFunction())
     or
     exists(GlobalVariable g, Namespace n | this = g and n.getADeclaration() = g and result = n)
     or
-    exists(TemplateVariable tv | this = tv.getATemplateArgument() and result = tv)
-    or
     exists(EnumConstant e | this = e and result = e.getDeclaringEnum())
     or
-    // result instanceof Block|Function
+    // result instanceof block|function
     exists(BlockStmt b | this = b and blockscope(unresolveElement(b), unresolveElement(result)))
     or
     exists(TemplateFunction tf | this = tf.getATemplateArgument() and result = tf)
     or
-    // result instanceof Stmt
+    // result instanceof stmt
     exists(ControlStructure s | this = s and result = s.getParent())
     or
     using_container(unresolveElement(result), underlyingElement(this))

cpp/ql/lib/semmle/code/cpp/Function.qll

@@ -30,6 +30,46 @@ class Function extends Declaration, ControlFlowNode, AccessHolder, @function {
 
   override string getName() { functions(underlyingElement(this), result, _) }
 
+  /**
+   * DEPRECATED: Use `getIdentityString(Declaration)` from `semmle.code.cpp.Print` instead.
+   * Gets the full signature of this function, including return type, parameter
+   * types, and template arguments.
+   *
+   * For example, in the following code:
+   * ```
+   * template<typename T> T min(T x, T y);
+   * int z = min(5, 7);
+   * ```
+   * The full signature of the function called on the last line would be
+   * `min<int>(int, int) -> int`, and the full signature of the uninstantiated
+   * template on the first line would be `min<T>(T, T) -> T`.
+   */
+  deprecated string getFullSignature() {
+    exists(string name, string templateArgs, string args |
+      result = name + templateArgs + args + " -> " + this.getType().toString() and
+      name = this.getQualifiedName() and
+      (
+        if exists(this.getATemplateArgument())
+        then
+          templateArgs =
+            "<" +
+              concat(int i |
+                exists(this.getTemplateArgument(i))
+              |
+                this.getTemplateArgument(i).toString(), ", " order by i
+              ) + ">"
+        else templateArgs = ""
+      ) and
+      args =
+        "(" +
+          concat(int i |
+            exists(this.getParameter(i))
+          |
+            this.getParameter(i).getType().toString(), ", " order by i
+          ) + ")"
+    )
+  }
+
   /** Gets a specifier of this function. */
   override Specifier getASpecifier() {
     funspecifiers(underlyingElement(this), unresolveElement(result)) or
@@ -118,26 +158,6 @@ class Function extends Declaration, ControlFlowNode, AccessHolder, @function {
    */
   predicate isConsteval() { this.hasSpecifier("is_consteval") }
 
-  /**
-   * Holds if this function is declared to be `explicit`.
-   */
-  predicate isExplicit() { this.hasSpecifier("explicit") }
-
-  /**
-   * Gets the constant expression that determines whether the function is explicit.
-   *
-   * For example, for the following code the result is the expression `sizeof(T) == 1`:
-   * ```
-   * template<typename T> struct C {
-   *   explicit(sizeof(T) == 1)
-   *   C(const T);
-   * };
-   * ```
-   */
-  Expr getExplicitExpr() {
-    explicit_specifier_exprs(underlyingElement(this), unresolveElement(result))
-  }
-
   /**
    * Holds if this function is declared with `__attribute__((naked))` or
    * `__declspec(naked)`.
@@ -500,17 +520,6 @@ class Function extends Declaration, ControlFlowNode, AccessHolder, @function {
    * Gets the nearest enclosing AccessHolder.
    */
   override AccessHolder getEnclosingAccessHolder() { result = this.getDeclaringType() }
-
-  /**
-   * Holds if this function has extraction errors that create an `ErrorExpr`.
-   */
-  predicate hasErrors() {
-    exists(ErrorExpr e |
-      e.getEnclosingFunction() = this and
-      // Exclude the first allocator call argument because it is always extracted as `ErrorExpr`.
-      not exists(NewOrNewArrayExpr new | e = new.getAllocatorCall().getArgument(0))
-    )
-  }
 }
 
 pragma[noinline]
@@ -662,8 +671,7 @@ class FunctionDeclarationEntry extends DeclarationEntry, @fun_decl {
 
   /**
    * Holds if this declaration is an implicit function declaration, that is,
-   * where a function is used before it is declared (under older C standards,
-   * or when there were parse errors).
+   * where a function is used before it is declared (under older C standards).
    */
   predicate isImplicit() { fun_implicit(underlyingElement(this)) }
 
@@ -890,11 +898,4 @@ class UserDefinedLiteral extends Function {
  */
 class DeductionGuide extends Function {
   DeductionGuide() { functions(underlyingElement(this), _, 8) }
-
-  /**
-   * Gets the class template for which this is a deduction guide.
-   */
-  TemplateClass getTemplateClass() {
-    deduction_guide_for_class(underlyingElement(this), unresolveElement(result))
-  }
 }

cpp/ql/lib/semmle/code/cpp/Parameter.qll

@@ -7,8 +7,8 @@ import semmle.code.cpp.Declaration
 private import semmle.code.cpp.internal.ResolveClass
 
 /**
- * A C/C++ function parameter, catch block parameter, or requires expression parameter.
- * For example the function parameter `p` and the catch block parameter `e` in the following
+ * A C/C++ function parameter or catch block parameter. For example the
+ * function parameter `p` and the catch block parameter `e` in the following
  * code:
  * ```
  * void myFunction(int p) {
@@ -20,8 +20,8 @@ private import semmle.code.cpp.internal.ResolveClass
  * }
  * ```
  *
- * For catch block parameters and expression , there is a one-to-one
- * correspondence between the `Parameter` and its `VariableDeclarationEntry`.
+ * For catch block parameters, there is a one-to-one correspondence between
+ * the `Parameter` and its `ParameterDeclarationEntry`.
  *
  * For function parameters, there is a one-to-many relationship between
  * `Parameter` and `ParameterDeclarationEntry`, because one function can
@@ -73,8 +73,7 @@ class Parameter extends LocalScopeVariable, @parameter {
   }
 
   private VariableDeclarationEntry getANamedDeclarationEntry() {
-    result = this.getAnEffectiveDeclarationEntry() and
-    exists(string name | var_decls(unresolveElement(result), _, _, name, _) | name != "")
+    result = this.getAnEffectiveDeclarationEntry() and result.getName() != ""
   }
 
   /**
@@ -119,12 +118,6 @@ class Parameter extends LocalScopeVariable, @parameter {
    */
   BlockStmt getCatchBlock() { params(underlyingElement(this), unresolveElement(result), _, _) }
 
-  /**
-   * Gets the requires expression to which the parameter belongs, if it is a
-   * requires expression parameter.
-   */
-  RequiresExpr getRequiresExpr() { params(underlyingElement(this), unresolveElement(result), _, _) }
-
   /**
    * Gets the zero-based index of this parameter.
    *

cpp/ql/lib/semmle/code/cpp/PrintAST.qll

@@ -80,10 +80,6 @@ private Declaration getAnEnclosingDeclaration(Locatable ast) {
   or
   result = ast.(Parameter).getFunction()
   or
-  result = ast.(Parameter).getCatchBlock().getEnclosingFunction()
-  or
-  result = ast.(Parameter).getRequiresExpr().getEnclosingFunction()
-  or
   result = ast.(Expr).getEnclosingDeclaration()
   or
   result = ast.(Initializer).getDeclaration()
@@ -103,10 +99,7 @@ private newtype TPrintAstNode =
     stmt.getADeclarationEntry() = entry and
     shouldPrintDeclaration(stmt.getEnclosingFunction())
   } or
-  TFunctionParametersNode(Function func) { shouldPrintDeclaration(func) } or
-  TRequiresExprParametersNode(RequiresExpr req) {
-    shouldPrintDeclaration(getAnEnclosingDeclaration(req))
-  } or
+  TParametersNode(Function func) { shouldPrintDeclaration(func) } or
   TConstructorInitializersNode(Constructor ctor) {
     ctor.hasEntryPoint() and
     shouldPrintDeclaration(ctor)
@@ -293,6 +286,9 @@ abstract class BaseAstNode extends PrintAstNode {
    * Gets the AST represented by this node.
    */
   final Locatable getAst() { result = ast }
+
+  /** DEPRECATED: Alias for getAst */
+  deprecated Locatable getAST() { result = this.getAst() }
 }
 
 /**
@@ -310,14 +306,14 @@ class ExprNode extends AstNode {
 
   ExprNode() { expr = ast }
 
-  override PrintAstNode getChildInternal(int childIndex) {
-    result.(AstNode).getAst() = expr.getChild(childIndex)
+  override AstNode getChildInternal(int childIndex) {
+    result.getAst() = expr.getChild(childIndex)
     or
     childIndex = max(int index | exists(expr.getChild(index)) or index = 0) + 1 and
-    result.(AstNode).getAst() = expr.(ConditionDeclExpr).getInitializingExpr()
+    result.getAst() = expr.(ConditionDeclExpr).getInitializingExpr()
     or
     exists(int destructorIndex |
-      result.(AstNode).getAst() = expr.getImplicitDestructorCall(destructorIndex) and
+      result.getAst() = expr.getImplicitDestructorCall(destructorIndex) and
       childIndex = destructorIndex + max(int index | exists(expr.getChild(index)) or index = 0) + 2
     )
   }
@@ -336,8 +332,7 @@ class ExprNode extends AstNode {
   }
 
   override string getChildAccessorPredicateInternal(int childIndex) {
-    result =
-      getChildAccessorWithoutConversions(ast, this.getChildInternal(childIndex).(AstNode).getAst())
+    result = getChildAccessorWithoutConversions(ast, this.getChildInternal(childIndex).getAst())
   }
 
   /**
@@ -390,21 +385,6 @@ class CastNode extends ConversionNode {
   }
 }
 
-/**
- * A node representing a `C11GenericExpr`.
- */
-class C11GenericNode extends ConversionNode {
-  C11GenericExpr generic;
-
-  C11GenericNode() { generic = conv }
-
-  override AstNode getChildInternal(int childIndex) {
-    result = super.getChildInternal(childIndex - count(generic.getAChild()))
-    or
-    result.getAst() = generic.getChild(childIndex)
-  }
-}
-
 /**
  * A node representing a `StmtExpr`.
  */
@@ -417,26 +397,6 @@ class StmtExprNode extends ExprNode {
   }
 }
 
-/**
- * A node representing a `RequiresExpr`
- */
-class RequiresExprNode extends ExprNode {
-  override RequiresExpr expr;
-
-  override PrintAstNode getChildInternal(int childIndex) {
-    result = super.getChildInternal(childIndex)
-    or
-    childIndex = -1 and
-    result.(RequiresExprParametersNode).getRequiresExpr() = expr
-  }
-
-  override string getChildAccessorPredicateInternal(int childIndex) {
-    result = super.getChildAccessorPredicateInternal(childIndex)
-    or
-    childIndex = -1 and result = "<params>"
-  }
-}
-
 /**
  * A node representing a `DeclarationEntry`.
  */
@@ -538,22 +498,6 @@ class DeclStmtNode extends StmtNode {
   }
 }
 
-/**
- * A node representing a `Handler`.
- */
-class HandlerNode extends ChildStmtNode {
-  Handler handler;
-
-  HandlerNode() { handler = stmt }
-
-  override BaseAstNode getChildInternal(int childIndex) {
-    result = super.getChildInternal(childIndex)
-    or
-    childIndex = -1 and
-    result.getAst() = handler.getParameter()
-  }
-}
-
 /**
  * A node representing a `Parameter`.
  */
@@ -596,10 +540,10 @@ class InitializerNode extends AstNode {
 /**
  * A node representing the parameters of a `Function`.
  */
-class FunctionParametersNode extends PrintAstNode, TFunctionParametersNode {
+class ParametersNode extends PrintAstNode, TParametersNode {
   Function func;
 
-  FunctionParametersNode() { this = TFunctionParametersNode(func) }
+  ParametersNode() { this = TParametersNode(func) }
 
   final override string toString() { result = "" }
 
@@ -620,33 +564,6 @@ class FunctionParametersNode extends PrintAstNode, TFunctionParametersNode {
   final Function getFunction() { result = func }
 }
 
-/**
- * A node representing the parameters of a `RequiresExpr`.
- */
-class RequiresExprParametersNode extends PrintAstNode, TRequiresExprParametersNode {
-  RequiresExpr req;
-
-  RequiresExprParametersNode() { this = TRequiresExprParametersNode(req) }
-
-  final override string toString() { result = "" }
-
-  final override Location getLocation() { result = getRepresentativeLocation(req) }
-
-  override AstNode getChildInternal(int childIndex) {
-    result.getAst() = req.getParameter(childIndex)
-  }
-
-  override string getChildAccessorPredicateInternal(int childIndex) {
-    exists(this.getChildInternal(childIndex)) and
-    result = "getParameter(" + childIndex.toString() + ")"
-  }
-
-  /**
-   * Gets the `RequiresExpr` for which this node represents the parameters.
-   */
-  final RequiresExpr getRequiresExpr() { result = req }
-}
-
 /**
  * A node representing the initializer list of a `Constructor`.
  */
@@ -750,7 +667,7 @@ class FunctionNode extends FunctionOrGlobalOrNamespaceVariableNode {
 
   override PrintAstNode getChildInternal(int childIndex) {
     childIndex = 0 and
-    result.(FunctionParametersNode).getFunction() = func
+    result.(ParametersNode).getFunction() = func
     or
     childIndex = 1 and
     result.(ConstructorInitializersNode).getConstructor() = func
@@ -825,8 +742,6 @@ private predicate namedStmtChildPredicates(Locatable s, Element e, string pred)
     or
     s.(ConstexprIfStmt).getElse() = e and pred = "getElse()"
     or
-    s.(Handler).getParameter() = e and pred = "getParameter()"
-    or
     s.(IfStmt).getInitialization() = e and pred = "getInitialization()"
     or
     s.(IfStmt).getCondition() = e and pred = "getCondition()"
@@ -945,15 +860,6 @@ private predicate namedExprChildPredicates(Expr expr, Element ele, string pred)
     or
     expr.(BuiltInVarArgsStart).getLastNamedParameter() = ele and pred = "getLastNamedParameter()"
     or
-    expr.(C11GenericExpr).getControllingExpr() = ele and pred = "getControllingExpr()"
-    or
-    exists(int n |
-      expr.(C11GenericExpr).getAssociationType(n) = ele.(TypeName).getType() and
-      pred = "getAssociationType(" + n + ")"
-      or
-      expr.(C11GenericExpr).getAssociationExpr(n) = ele and pred = "getAssociationExpr(" + n + ")"
-    )
-    or
     expr.(Call).getQualifier() = ele and pred = "getQualifier()"
     or
     exists(int n | expr.(Call).getArgument(n) = ele and pred = "getArgument(" + n.toString() + ")")
@@ -974,11 +880,6 @@ private predicate namedExprChildPredicates(Expr expr, Element ele, string pred)
     or
     expr.(CommaExpr).getRightOperand() = ele and pred = "getRightOperand()"
     or
-    expr.(CompoundRequirementExpr).getExpr() = ele and pred = "getExpr()"
-    or
-    expr.(CompoundRequirementExpr).getReturnTypeRequirement() = ele and
-    pred = "getReturnTypeRequirement()"
-    or
     expr.(ConditionDeclExpr).getVariableAccess() = ele and pred = "getVariableAccess()"
     or
     expr.(ConstructorFieldInit).getExpr() = ele and pred = "getExpr()"
@@ -999,8 +900,6 @@ private predicate namedExprChildPredicates(Expr expr, Element ele, string pred)
     or
     expr.(LambdaExpression).getInitializer() = ele and pred = "getInitializer()"
     or
-    expr.(NestedRequirementExpr).getConstraint() = ele and pred = "getConstraint()"
-    or
     expr.(NewOrNewArrayExpr).getAllocatorCall() = ele and pred = "getAllocatorCall()"
     or
     expr.(NewOrNewArrayExpr).getAlignmentArgument() = ele and pred = "getAlignmentArgument()"
@@ -1040,11 +939,6 @@ private predicate namedExprChildPredicates(Expr expr, Element ele, string pred)
     or
     expr.(UnaryOperation).getOperand() = ele and pred = "getOperand()"
     or
-    exists(int n |
-      expr.(RequiresExpr).getRequirement(n) = ele and
-      pred = "getRequirement(" + n + ")"
-    )
-    or
     expr.(SizeofExprOperator).getExprOperand() = ele and pred = "getExprOperand()"
     or
     expr.(StmtExpr).getStmt() = ele and pred = "getStmt()"

cpp/ql/lib/semmle/code/cpp/Type.qll

@@ -39,8 +39,8 @@ class Type extends Locatable, @type {
 
   /**
    * Gets a specifier of this type, recursively looking through `typedef` and
-   * `decltype`. For example, in the context of `typedef const int *restrict t`,
-   * the type `volatile t` has specifiers `volatile` and `restrict` but not
+   * `decltype`. For example, in the context of `typedef const int *restrict
+   * t`, the type `volatile t` has specifiers `volatile` and `restrict` but not
    * `const` since the `const` is attached to the type being pointed to rather
    * than the pointer itself.
    */

cpp/ql/lib/semmle/code/cpp/Variable.qll

@@ -241,10 +241,6 @@ class VariableDeclarationEntry extends DeclarationEntry, @var_decl {
         name != "" and result = name
         or
         name = "" and result = this.getVariable().(LocalVariable).getName()
-        or
-        name = "" and
-        not this instanceof ParameterDeclarationEntry and
-        result = this.getVariable().(Parameter).getName()
       )
     )
   }
@@ -299,11 +295,19 @@ class ParameterDeclarationEntry extends VariableDeclarationEntry {
 
   private string getAnonymousParameterDescription() {
     not exists(this.getName()) and
-    exists(string anon |
-      anon = "(unnamed parameter " + this.getIndex().toString() + ")" and
+    exists(string idx |
+      idx =
+        ((this.getIndex() + 1).toString() + "th")
+            .replaceAll("1th", "1st")
+            .replaceAll("2th", "2nd")
+            .replaceAll("3th", "3rd")
+            .replaceAll("11st", "11th")
+            .replaceAll("12nd", "12th")
+            .replaceAll("13rd", "13th") and
       if exists(this.getCanonicalName())
-      then result = "declaration of " + this.getCanonicalName() + " as " + anon
-      else result = "declaration of " + anon
+      then
+        result = "declaration of " + this.getCanonicalName() + " as anonymous " + idx + " parameter"
+      else result = "declaration of " + idx + " parameter"
     )
   }
 
@@ -405,18 +409,11 @@ class LocalVariable extends LocalScopeVariable, @localvariable {
     exists(ConditionDeclExpr e | e.getVariable() = this and e.getEnclosingFunction() = result)
     or
     orphaned_variables(underlyingElement(this), unresolveElement(result))
-    or
-    coroutine_placeholder_variable(underlyingElement(this), _, unresolveElement(result))
   }
 
   override predicate isStatic() {
     super.isStatic() or orphaned_variables(underlyingElement(this), _)
   }
-
-  override predicate isCompilerGenerated() {
-    super.isCompilerGenerated() or
-    coroutine_placeholder_variable(underlyingElement(this), _, _)
-  }
 }
 
 /**

cpp/ql/lib/semmle/code/cpp/commons/Alloc.qll

@@ -7,6 +7,15 @@ import semmle.code.cpp.models.interfaces.Deallocation
  */
 predicate freeFunction(Function f, int argNum) { argNum = f.(DeallocationFunction).getFreedArg() }
 
+/**
+ * A call to a library routine that frees memory.
+ *
+ * DEPRECATED: Use `DeallocationExpr` instead (this also includes `delete` expressions).
+ */
+deprecated predicate freeCall(FunctionCall fc, Expr arg) {
+  arg = fc.(DeallocationExpr).getFreedExpr()
+}
+
 /**
  * Is e some kind of allocation or deallocation (`new`, `alloc`, `realloc`, `delete`, `free` etc)?
  */

cpp/ql/lib/semmle/code/cpp/commons/Buffer.qll

@@ -57,7 +57,7 @@ private int isSource(Expr bufferExpr, Element why) {
   exists(Type bufferType |
     // buffer is the address of a variable
     why = bufferExpr.(AddressOfExpr).getAddressable() and
-    bufferType = why.(Variable).getUnspecifiedType() and
+    bufferType = why.(Variable).getType() and
     result = bufferType.getSize() and
     not bufferType instanceof ReferenceType and
     not any(Union u).getAMemberVariable() = why

cpp/ql/lib/semmle/code/cpp/dataflow/ExternalFlow.qll

@@ -435,17 +435,12 @@ private predicate elementSpec(
 }
 
 /** Gets the fully templated version of `f`. */
-private Function getFullyTemplatedFunction(Function f) {
+private Function getFullyTemplatedMemberFunction(Function f) {
   not f.isFromUninstantiatedTemplate(_) and
-  (
-    exists(Class c, Class templateClass, int i |
-      c.isConstructedFrom(templateClass) and
-      f = c.getAMember(i) and
-      result = templateClass.getCanonicalMember(i)
-    )
-    or
-    not exists(f.getDeclaringType()) and
-    f.isConstructedFrom(result)
+  exists(Class c, Class templateClass, int i |
+    c.isConstructedFrom(templateClass) and
+    f = c.getAMember(i) and
+    result = templateClass.getCanonicalMember(i)
   )
 }
 
@@ -469,14 +464,14 @@ string getParameterTypeWithoutTemplateArguments(Function f, int n) {
  */
 private string getTypeNameWithoutFunctionTemplates(Function f, int n, int remaining) {
   exists(Function templateFunction |
-    templateFunction = getFullyTemplatedFunction(f) and
+    templateFunction = getFullyTemplatedMemberFunction(f) and
     remaining = templateFunction.getNumberOfTemplateArguments() and
     result = getParameterTypeWithoutTemplateArguments(templateFunction, n)
   )
   or
   exists(string mid, TemplateParameter tp, Function templateFunction |
     mid = getTypeNameWithoutFunctionTemplates(f, n, remaining + 1) and
-    templateFunction = getFullyTemplatedFunction(f) and
+    templateFunction = getFullyTemplatedMemberFunction(f) and
     tp = templateFunction.getTemplateArgument(remaining) and
     result = mid.replaceAll(tp.getName(), "func:" + remaining.toString())
   )
@@ -487,18 +482,12 @@ private string getTypeNameWithoutFunctionTemplates(Function f, int n, int remain
  * with `class:N` (where `N` is the index of the template).
  */
 private string getTypeNameWithoutClassTemplates(Function f, int n, int remaining) {
-  // If there is a declaring type then we start by expanding the function templates
   exists(Class template |
     f.getDeclaringType().isConstructedFrom(template) and
     remaining = template.getNumberOfTemplateArguments() and
     result = getTypeNameWithoutFunctionTemplates(f, n, 0)
   )
   or
-  // If there is no declaring type we're done after expanding the function templates
-  not exists(f.getDeclaringType()) and
-  remaining = 0 and
-  result = getTypeNameWithoutFunctionTemplates(f, n, 0)
-  or
   exists(string mid, TemplateParameter tp, Class template |
     mid = getTypeNameWithoutClassTemplates(f, n, remaining + 1) and
     f.getDeclaringType().isConstructedFrom(template) and
@@ -581,6 +570,38 @@ private string getSignatureWithoutFunctionTemplateNames(
   )
 }
 
+private string paramsStringPart(Function c, int i) {
+  not c.isFromUninstantiatedTemplate(_) and
+  (
+    i = -1 and result = "(" and exists(c)
+    or
+    exists(int n, string p | getParameterTypeName(c, n) = p |
+      i = 2 * n and result = p
+      or
+      i = 2 * n - 1 and result = "," and n != 0
+    )
+    or
+    i = 2 * c.getNumberOfParameters() and result = ")"
+  )
+}
+
+/**
+ * Gets a parenthesized string containing all parameter types of this callable, separated by a comma.
+ *
+ * Returns the empty string if the callable has no parameters.
+ * Parameter types are represented by their type erasure.
+ */
+cached
+private string paramsString(Function c) {
+  result = concat(int i | | paramsStringPart(c, i) order by i)
+}
+
+bindingset[func]
+private predicate matchesSignature(Function func, string signature) {
+  signature = "" or
+  paramsString(func) = signature
+}
+
 /**
  * Holds if `elementSpec(_, type, _, name, signature, _)` holds and
  * - `typeArgs` represents the named template parameters supplied to `type`, and
@@ -729,17 +750,17 @@ private predicate elementSpecWithArguments0(
 
 /**
  * Holds if `elementSpec(namespace, type, subtypes, name, signature, _)` and
- * `func`'s signature matches `signature`.
+ * `method`'s signature matches `signature`.
  *
  * `signature` may contain template parameter names that are bound by `type` and `name`.
  */
 pragma[nomagic]
 private predicate elementSpecMatchesSignature(
-  Function func, string namespace, string type, boolean subtypes, string name, string signature
+  Function method, string namespace, string type, boolean subtypes, string name, string signature
 ) {
   elementSpec(namespace, pragma[only_bind_into](type), subtypes, pragma[only_bind_into](name),
     pragma[only_bind_into](signature), _) and
-  signatureMatches(func, signature, type, name, 0)
+  signatureMatches(method, signature, type, name, 0)
 }
 
 /**
@@ -755,22 +776,13 @@ private predicate hasClassAndName(Class classWithMethod, Function method, string
   )
 }
 
-bindingset[name]
-pragma[inline_late]
-private predicate funcHasQualifiedName(Function func, string namespace, string name) {
-  exists(string nameWithoutArgs |
-    parseAngles(name, nameWithoutArgs, _, "") and
-    func.hasQualifiedName(namespace, nameWithoutArgs)
-  )
-}
-
 /**
  * Holds if `namedClass` is in namespace `namespace` and has
  * name `type` (excluding any template parameters).
  */
 bindingset[type, namespace]
 pragma[inline_late]
-private predicate classHasQualifiedName(Class namedClass, string namespace, string type) {
+private predicate hasQualifiedName(Class namedClass, string namespace, string type) {
   exists(string typeWithoutArgs |
     parseAngles(type, typeWithoutArgs, _, "") and
     namedClass.hasQualifiedName(namespace, typeWithoutArgs)
@@ -792,16 +804,15 @@ private Element interpretElement0(
   string namespace, string type, boolean subtypes, string name, string signature
 ) {
   (
-    // Non-member functions
     elementSpec(namespace, type, subtypes, name, signature, _) and
-    subtypes = false and
-    type = "" and
-    (
-      elementSpecMatchesSignature(result, namespace, type, subtypes, name, signature)
-      or
-      signature = "" and
-      elementSpec(namespace, type, subtypes, name, "", _) and
-      funcHasQualifiedName(result, namespace, name)
+    // Non-member functions
+    exists(Function func |
+      func.hasQualifiedName(namespace, name) and
+      type = "" and
+      matchesSignature(func, signature) and
+      subtypes = false and
+      not exists(func.getDeclaringType()) and
+      result = func
     )
     or
     // Member functions
@@ -814,7 +825,7 @@ private Element interpretElement0(
         elementSpec(namespace, type, subtypes, name, "", _) and
         hasClassAndName(classWithMethod, result, name)
       ) and
-      classHasQualifiedName(namedClass, namespace, type) and
+      hasQualifiedName(namedClass, namespace, type) and
       (
         // member declared in the named type or a subtype of it
         subtypes = true and
@@ -953,3 +964,21 @@ private class SummarizedCallableAdapter extends SummarizedCallable {
     interpretSummary(this, _, _, _, provenance, _)
   }
 }
+
+// adapter class for converting Mad neutrals to `NeutralCallable`s
+private class NeutralCallableAdapter extends NeutralCallable {
+  string kind;
+  string provenance_;
+
+  NeutralCallableAdapter() {
+    // Neutral models have not been implemented for CPP.
+    none() and
+    exists(this) and
+    exists(kind) and
+    exists(provenance_)
+  }
+
+  override string getKind() { result = kind }
+
+  override predicate hasProvenance(Provenance provenance) { provenance = provenance_ }
+}

cpp/ql/lib/semmle/code/cpp/dataflow/internal/DataFlowImpl1.qll

@@ -168,6 +168,14 @@ abstract deprecated class Configuration extends string {
    */
   predicate hasFlowToExpr(DataFlowExpr sink) { this.hasFlowTo(exprNode(sink)) }
 
+  /**
+   * DEPRECATED: Use `FlowExploration<explorationLimit>` instead.
+   *
+   * Gets the exploration limit for `hasPartialFlow` and `hasPartialFlowRev`
+   * measured in approximate number of interprocedural steps.
+   */
+  deprecated int explorationLimit() { none() }
+
   /**
    * Holds if hidden nodes should be included in the data flow graph.
    *
@@ -282,9 +290,15 @@ deprecated private module Config implements FullStateConfigSig {
 
   FlowFeature getAFeature() { result = any(Configuration config).getAFeature() }
 
-  predicate includeHiddenNodes() { any(Configuration config).includeHiddenNodes() }
+  predicate sourceGrouping(Node source, string sourceGroup) {
+    any(Configuration config).sourceGrouping(source, sourceGroup)
+  }
 
-  predicate observeDiffInformedIncrementalMode() { none() }
+  predicate sinkGrouping(Node sink, string sinkGroup) {
+    any(Configuration config).sinkGrouping(sink, sinkGroup)
+  }
+
+  predicate includeHiddenNodes() { any(Configuration config).includeHiddenNodes() }
 }
 
 deprecated private import Impl<Config> as I

cpp/ql/lib/semmle/code/cpp/dataflow/internal/DataFlowImpl2.qll

@@ -168,6 +168,14 @@ abstract deprecated class Configuration extends string {
    */
   predicate hasFlowToExpr(DataFlowExpr sink) { this.hasFlowTo(exprNode(sink)) }
 
+  /**
+   * DEPRECATED: Use `FlowExploration<explorationLimit>` instead.
+   *
+   * Gets the exploration limit for `hasPartialFlow` and `hasPartialFlowRev`
+   * measured in approximate number of interprocedural steps.
+   */
+  deprecated int explorationLimit() { none() }
+
   /**
    * Holds if hidden nodes should be included in the data flow graph.
    *
@@ -282,9 +290,15 @@ deprecated private module Config implements FullStateConfigSig {
 
   FlowFeature getAFeature() { result = any(Configuration config).getAFeature() }
 
-  predicate includeHiddenNodes() { any(Configuration config).includeHiddenNodes() }
+  predicate sourceGrouping(Node source, string sourceGroup) {
+    any(Configuration config).sourceGrouping(source, sourceGroup)
+  }
 
-  predicate observeDiffInformedIncrementalMode() { none() }
+  predicate sinkGrouping(Node sink, string sinkGroup) {
+    any(Configuration config).sinkGrouping(sink, sinkGroup)
+  }
+
+  predicate includeHiddenNodes() { any(Configuration config).includeHiddenNodes() }
 }
 
 deprecated private import Impl<Config> as I

cpp/ql/lib/semmle/code/cpp/dataflow/internal/DataFlowImpl3.qll

@@ -168,6 +168,14 @@ abstract deprecated class Configuration extends string {
    */
   predicate hasFlowToExpr(DataFlowExpr sink) { this.hasFlowTo(exprNode(sink)) }
 
+  /**
+   * DEPRECATED: Use `FlowExploration<explorationLimit>` instead.
+   *
+   * Gets the exploration limit for `hasPartialFlow` and `hasPartialFlowRev`
+   * measured in approximate number of interprocedural steps.
+   */
+  deprecated int explorationLimit() { none() }
+
   /**
    * Holds if hidden nodes should be included in the data flow graph.
    *
@@ -282,9 +290,15 @@ deprecated private module Config implements FullStateConfigSig {
 
   FlowFeature getAFeature() { result = any(Configuration config).getAFeature() }
 
-  predicate includeHiddenNodes() { any(Configuration config).includeHiddenNodes() }
+  predicate sourceGrouping(Node source, string sourceGroup) {
+    any(Configuration config).sourceGrouping(source, sourceGroup)
+  }
 
-  predicate observeDiffInformedIncrementalMode() { none() }
+  predicate sinkGrouping(Node sink, string sinkGroup) {
+    any(Configuration config).sinkGrouping(sink, sinkGroup)
+  }
+
+  predicate includeHiddenNodes() { any(Configuration config).includeHiddenNodes() }
 }
 
 deprecated private import Impl<Config> as I

cpp/ql/lib/semmle/code/cpp/dataflow/internal/DataFlowImpl4.qll

@@ -168,6 +168,14 @@ abstract deprecated class Configuration extends string {
    */
   predicate hasFlowToExpr(DataFlowExpr sink) { this.hasFlowTo(exprNode(sink)) }
 
+  /**
+   * DEPRECATED: Use `FlowExploration<explorationLimit>` instead.
+   *
+   * Gets the exploration limit for `hasPartialFlow` and `hasPartialFlowRev`
+   * measured in approximate number of interprocedural steps.
+   */
+  deprecated int explorationLimit() { none() }
+
   /**
    * Holds if hidden nodes should be included in the data flow graph.
    *
@@ -282,9 +290,15 @@ deprecated private module Config implements FullStateConfigSig {
 
   FlowFeature getAFeature() { result = any(Configuration config).getAFeature() }
 
-  predicate includeHiddenNodes() { any(Configuration config).includeHiddenNodes() }
+  predicate sourceGrouping(Node source, string sourceGroup) {
+    any(Configuration config).sourceGrouping(source, sourceGroup)
+  }
 
-  predicate observeDiffInformedIncrementalMode() { none() }
+  predicate sinkGrouping(Node sink, string sinkGroup) {
+    any(Configuration config).sinkGrouping(sink, sinkGroup)
+  }
+
+  predicate includeHiddenNodes() { any(Configuration config).includeHiddenNodes() }
 }
 
 deprecated private import Impl<Config> as I

cpp/ql/lib/semmle/code/cpp/dataflow/internal/DataFlowImplLocal.qll

@@ -168,6 +168,14 @@ abstract deprecated class Configuration extends string {
    */
   predicate hasFlowToExpr(DataFlowExpr sink) { this.hasFlowTo(exprNode(sink)) }
 
+  /**
+   * DEPRECATED: Use `FlowExploration<explorationLimit>` instead.
+   *
+   * Gets the exploration limit for `hasPartialFlow` and `hasPartialFlowRev`
+   * measured in approximate number of interprocedural steps.
+   */
+  deprecated int explorationLimit() { none() }
+
   /**
    * Holds if hidden nodes should be included in the data flow graph.
    *
@@ -282,9 +290,15 @@ deprecated private module Config implements FullStateConfigSig {
 
   FlowFeature getAFeature() { result = any(Configuration config).getAFeature() }
 
-  predicate includeHiddenNodes() { any(Configuration config).includeHiddenNodes() }
+  predicate sourceGrouping(Node source, string sourceGroup) {
+    any(Configuration config).sourceGrouping(source, sourceGroup)
+  }
 
-  predicate observeDiffInformedIncrementalMode() { none() }
+  predicate sinkGrouping(Node sink, string sinkGroup) {
+    any(Configuration config).sinkGrouping(sink, sinkGroup)
+  }
+
+  predicate includeHiddenNodes() { any(Configuration config).includeHiddenNodes() }
 }
 
 deprecated private import Impl<Config> as I

cpp/ql/lib/semmle/code/cpp/exprs/BuiltInOperations.qll

@@ -1885,59 +1885,3 @@ class BuiltInOperationIsWinInterface extends BuiltInOperation, @iswininterface {
 
   override string getAPrimaryQlClass() { result = "BuiltInOperationIsWinInterface" }
 }
-
-/**
- * A C++ `__is_trivially_equality_comparable` built-in operation.
- *
- * Returns `true` if comparing two objects of type `_Tp` is equivalent to
- * comparing their object representations.
- *
- * ```
- * template<typename _Tp>
- *   struct is_trivially_equality_comparable
- *   : public integral_constant<bool, __is_trivially_equality_comparable(_Tp)>
- *   {};
- * ```
- */
-class BuiltInOperationIsTriviallyEqualityComparable extends BuiltInOperation,
-  @istriviallyequalitycomparable
-{
-  override string toString() { result = "__is_trivially_equality_comparable" }
-
-  override string getAPrimaryQlClass() { result = "BuiltInOperationIsTriviallyEqualityComparable" }
-}
-
-/**
- * A C++ `__is_scoped_enum` built-in operation (used by some implementations
- * of the `<type_traits>` header).
- *
- * Returns `true` if a type is a scoped enum.
- * ```
- * template<typename _Tp>
- * constexpr bool is_scoped_enum = __is_scoped_enum(_Tp);
- * ```
- */
-class BuiltInOperationIsScopedEnum extends BuiltInOperation, @isscopedenum {
-  override string toString() { result = "__is_scoped_enum" }
-
-  override string getAPrimaryQlClass() { result = "BuiltInOperationIsScopedEnum" }
-}
-
-/**
- * A C++ `__is_trivially_relocatable` built-in operation.
- *
- * Returns `true` if moving an object of type `_Tp` is equivalent to
- * copying the underlying bytes.
- *
- * ```
- * template<typename _Tp>
- *   struct is_trivially_relocatable
- *   : public integral_constant<bool, __is_trivially_relocatable(_Tp)>
- *   {};
- * ```
- */
-class BuiltInOperationIsTriviallyRelocatable extends BuiltInOperation, @istriviallyrelocatable {
-  override string toString() { result = "__is_trivially_relocatable" }
-
-  override string getAPrimaryQlClass() { result = "BuiltInOperationIsTriviallyRelocatable" }
-}

cpp/ql/lib/semmle/code/cpp/exprs/Cast.qll

@@ -791,53 +791,6 @@ class AlignofTypeOperator extends AlignofOperator {
   override string toString() { result = "alignof(" + this.getTypeOperand().getName() + ")" }
 }
 
-/**
- * A C++ `__datasizeof` expression (used by some implementations
- * of the `<type_traits>` header).
- *
- * The `__datasizeof` expression behaves identically to `sizeof` except
- * that the result ignores tail padding.
- */
-class DatasizeofOperator extends Expr, @datasizeof {
-  override int getPrecedence() { result = 16 }
-}
-
-/**
- * A C++ `__datasizeof` expression whose operand is an expression.
- */
-class DatasizeofExprOperator extends DatasizeofOperator {
-  DatasizeofExprOperator() { exists(this.getChild(0)) }
-
-  override string getAPrimaryQlClass() { result = "DatasizeofExprOperator" }
-
-  /** Gets the contained expression. */
-  Expr getExprOperand() { result = this.getChild(0) }
-
-  override string toString() { result = "__datasizeof(<expr>)" }
-
-  override predicate mayBeImpure() { this.getExprOperand().mayBeImpure() }
-
-  override predicate mayBeGloballyImpure() { this.getExprOperand().mayBeGloballyImpure() }
-}
-
-/**
- * A C++ `__datasizeof` expression whose operand is a type name.
- */
-class DatasizeofTypeOperator extends DatasizeofOperator {
-  DatasizeofTypeOperator() { sizeof_bind(underlyingElement(this), _) }
-
-  override string getAPrimaryQlClass() { result = "DatasizeofTypeOperator" }
-
-  /** Gets the contained type. */
-  Type getTypeOperand() { sizeof_bind(underlyingElement(this), unresolveElement(result)) }
-
-  override string toString() { result = "__datasizeof(" + this.getTypeOperand().getName() + ")" }
-
-  override predicate mayBeImpure() { none() }
-
-  override predicate mayBeGloballyImpure() { none() }
-}
-
 /**
  * A C/C++ array to pointer conversion.
  *

cpp/ql/lib/semmle/code/cpp/exprs/Expr.qll

@@ -304,15 +304,9 @@ class Expr extends StmtParent, @expr {
       e instanceof NoExceptExpr
       or
       e instanceof AlignofOperator
-      or
-      e instanceof DatasizeofOperator
     )
     or
     exists(Decltype d | d.getExpr() = this.getParentWithConversions*())
-    or
-    exists(ConstexprIfStmt constIf |
-      constIf.getControllingExpr() = this.getParentWithConversions*()
-    )
   }
 
   /**
@@ -632,106 +626,6 @@ class ParenthesisExpr extends Conversion, @parexpr {
   override string getAPrimaryQlClass() { result = "ParenthesisExpr" }
 }
 
-/**
- * A node representing a C11 `_Generic` selection expression.
- *
- * For example:
- * ```
- * _Generic(e, int: "int", default: "unknown")
- * ```
- */
-class C11GenericExpr extends Conversion, @c11_generic {
-  int associationCount;
-
-  C11GenericExpr() { associationCount = (count(this.getAChild()) - 1) / 2 }
-
-  override string toString() { result = "_Generic" }
-
-  override string getAPrimaryQlClass() { result = "C11GenericExpr" }
-
-  /**
-   * Gets the controlling expression of the generic selection.
-   *
-   * For example, for
-   * ```
-   * _Generic(e, int: "a", default: "b")
-   * ```
-   * the result is `e`.
-   */
-  Expr getControllingExpr() { result = this.getChild(0) }
-
-  /**
-   * Gets the type of the `n`th element in the association list of the generic selection.
-   *
-   * For example, for
-   * ```
-   * _Generic(e, int: "a", default: "b")
-   * ```
-   * the type of the 0th element is `int`. In the case of the default element the
-   * type will an instance of `VoidType`.
-   */
-  Type getAssociationType(int n) {
-    n in [0 .. associationCount - 1] and
-    result = this.getChild(n * 2 + 1).(TypeName).getType()
-  }
-
-  /**
-   * Gets the type of an element in the association list of the generic selection.
-   */
-  Type getAnAssociationType() { result = this.getAssociationType(_) }
-
-  /**
-   * Gets the expression of the `n`th element in the association list of
-   * the generic selection.
-   *
-   * For example, for
-   * ```
-   * _Generic(e, int: "a", default: "b")
-   * ```
-   * the expression for 0th element is `"a"`, and the expression for the
-   * 1st element is `"b"`. For the selected expression, this predicate
-   * will yield a `ReuseExpr`, such that
-   * ```
-   * this.getAssociationExpr(n).(ReuseExpr).getReusedExpr() = this.getExpr()
-   * ```
-   */
-  Expr getAssociationExpr(int n) {
-    n in [0 .. associationCount - 1] and
-    result = this.getChild(n * 2 + 2)
-  }
-
-  /**
-   * Gets the expression of an element in the association list of the generic selection.
-   */
-  Expr getAnAssociationExpr() { result = this.getAssociationExpr(_) }
-
-  /**
-   * Holds if the `n`th element of the association list of the generic selection is the
-   * default element.
-   *
-   * For example, for
-   * ```
-   * _Generic(e, int: "a", default: "b")
-   * ```
-   * this holds for 1.
-   */
-  predicate isDefaultAssociation(int n) { this.getAssociationType(n) instanceof VoidType }
-
-  /**
-   * Holds if the `n`th element of the association list of the generic selection is the
-   * one whose expression was selected.
-   *
-   * For example, with `e` of type `int` and
-   * ```
-   * _Generic(e, int: "a", default: "b")
-   * ```
-   * this holds for 0.
-   */
-  predicate isSelectedAssociation(int n) {
-    this.getAssociationExpr(n).(ReuseExpr).getReusedExpr() = this.getExpr()
-  }
-}
-
 /**
  * A C/C++ expression that could not be resolved, or that can no longer be
  * represented due to a database upgrade or downgrade.
@@ -768,8 +662,6 @@ class AssumeExpr extends Expr, @assume {
 
 /**
  * A C/C++ comma expression.
- *
- * For example:
  * ```
  * int c = compute1(), compute2(), resulting_value;
  * ```

cpp/ql/lib/semmle/code/cpp/exprs/Literal.qll

@@ -195,6 +195,17 @@ class ClassAggregateLiteral extends AggregateLiteral {
    */
   Expr getAFieldExpr(Field field) { result = this.getFieldExpr(field, _) }
 
+  /**
+   * DEPRECATED: Use `getAFieldExpr` instead.
+   *
+   * Gets the expression within the aggregate literal that is used to initialize
+   * field `field`, if present.
+   *
+   * This predicate may have multiple results since a field can be initialized
+   * multiple times in the same initializer.
+   */
+  deprecated Expr getFieldExpr(Field field) { result = this.getFieldExpr(field, _) }
+
   /**
    * Gets the expression within the aggregate literal that is used to initialize
    * field `field`, if present. The expression is the `position`'th entry in the
@@ -289,6 +300,17 @@ class ArrayOrVectorAggregateLiteral extends AggregateLiteral {
    */
   Expr getAnElementExpr(int elementIndex) { result = this.getElementExpr(elementIndex, _) }
 
+  /**
+   * DEPRECATED: Use `getAnElementExpr` instead.
+   *
+   * Gets the expression within the aggregate literal that is used to initialize
+   * element `elementIndex`, if present.
+   *
+   * This predicate may have multiple results since an element can be initialized
+   * multiple times in the same initializer.
+   */
+  deprecated Expr getElementExpr(int elementIndex) { result = this.getElementExpr(elementIndex, _) }
+
   /**
    * Gets the expression within the aggregate literal that is used to initialize
    * element `elementIndex`, if present. The expression is the `position`'th entry

cpp/ql/lib/semmle/code/cpp/internal/QualifiedName.qll

@@ -181,7 +181,12 @@ class VariableDeclarationEntry extends @var_decl {
   string getName() { var_decls(this, _, _, result, _) and result != "" }
 }
 
-class Parameter extends LocalScopeVariable, @parameter { }
+class Parameter extends LocalScopeVariable, @parameter {
+  @functionorblock function;
+  int index;
+
+  Parameter() { params(this, function, index, _) }
+}
 
 class GlobalOrNamespaceVariable extends Variable, @globalvariable { }
 

cpp/ql/lib/semmle/code/cpp/ir/dataflow/internal/DataFlowImpl1.qll

@@ -168,6 +168,14 @@ abstract deprecated class Configuration extends string {
    */
   predicate hasFlowToExpr(DataFlowExpr sink) { this.hasFlowTo(exprNode(sink)) }
 
+  /**
+   * DEPRECATED: Use `FlowExploration<explorationLimit>` instead.
+   *
+   * Gets the exploration limit for `hasPartialFlow` and `hasPartialFlowRev`
+   * measured in approximate number of interprocedural steps.
+   */
+  deprecated int explorationLimit() { none() }
+
   /**
    * Holds if hidden nodes should be included in the data flow graph.
    *
@@ -282,9 +290,15 @@ deprecated private module Config implements FullStateConfigSig {
 
   FlowFeature getAFeature() { result = any(Configuration config).getAFeature() }
 
-  predicate includeHiddenNodes() { any(Configuration config).includeHiddenNodes() }
+  predicate sourceGrouping(Node source, string sourceGroup) {
+    any(Configuration config).sourceGrouping(source, sourceGroup)
+  }
 
-  predicate observeDiffInformedIncrementalMode() { none() }
+  predicate sinkGrouping(Node sink, string sinkGroup) {
+    any(Configuration config).sinkGrouping(sink, sinkGroup)
+  }
+
+  predicate includeHiddenNodes() { any(Configuration config).includeHiddenNodes() }
 }
 
 deprecated private import Impl<Config> as I

cpp/ql/lib/semmle/code/cpp/ir/dataflow/internal/DataFlowImpl2.qll

@@ -168,6 +168,14 @@ abstract deprecated class Configuration extends string {
    */
   predicate hasFlowToExpr(DataFlowExpr sink) { this.hasFlowTo(exprNode(sink)) }
 
+  /**
+   * DEPRECATED: Use `FlowExploration<explorationLimit>` instead.
+   *
+   * Gets the exploration limit for `hasPartialFlow` and `hasPartialFlowRev`
+   * measured in approximate number of interprocedural steps.
+   */
+  deprecated int explorationLimit() { none() }
+
   /**
    * Holds if hidden nodes should be included in the data flow graph.
    *
@@ -282,9 +290,15 @@ deprecated private module Config implements FullStateConfigSig {
 
   FlowFeature getAFeature() { result = any(Configuration config).getAFeature() }
 
-  predicate includeHiddenNodes() { any(Configuration config).includeHiddenNodes() }
+  predicate sourceGrouping(Node source, string sourceGroup) {
+    any(Configuration config).sourceGrouping(source, sourceGroup)
+  }
 
-  predicate observeDiffInformedIncrementalMode() { none() }
+  predicate sinkGrouping(Node sink, string sinkGroup) {
+    any(Configuration config).sinkGrouping(sink, sinkGroup)
+  }
+
+  predicate includeHiddenNodes() { any(Configuration config).includeHiddenNodes() }
 }
 
 deprecated private import Impl<Config> as I

cpp/ql/lib/semmle/code/cpp/ir/dataflow/internal/DataFlowImpl3.qll

@@ -168,6 +168,14 @@ abstract deprecated class Configuration extends string {
    */
   predicate hasFlowToExpr(DataFlowExpr sink) { this.hasFlowTo(exprNode(sink)) }
 
+  /**
+   * DEPRECATED: Use `FlowExploration<explorationLimit>` instead.
+   *
+   * Gets the exploration limit for `hasPartialFlow` and `hasPartialFlowRev`
+   * measured in approximate number of interprocedural steps.
+   */
+  deprecated int explorationLimit() { none() }
+
   /**
    * Holds if hidden nodes should be included in the data flow graph.
    *
@@ -282,9 +290,15 @@ deprecated private module Config implements FullStateConfigSig {
 
   FlowFeature getAFeature() { result = any(Configuration config).getAFeature() }
 
-  predicate includeHiddenNodes() { any(Configuration config).includeHiddenNodes() }
+  predicate sourceGrouping(Node source, string sourceGroup) {
+    any(Configuration config).sourceGrouping(source, sourceGroup)
+  }
 
-  predicate observeDiffInformedIncrementalMode() { none() }
+  predicate sinkGrouping(Node sink, string sinkGroup) {
+    any(Configuration config).sinkGrouping(sink, sinkGroup)
+  }
+
+  predicate includeHiddenNodes() { any(Configuration config).includeHiddenNodes() }
 }
 
 deprecated private import Impl<Config> as I

cpp/ql/lib/semmle/code/cpp/ir/dataflow/internal/DataFlowImpl4.qll

@@ -168,6 +168,14 @@ abstract deprecated class Configuration extends string {
    */
   predicate hasFlowToExpr(DataFlowExpr sink) { this.hasFlowTo(exprNode(sink)) }
 
+  /**
+   * DEPRECATED: Use `FlowExploration<explorationLimit>` instead.
+   *
+   * Gets the exploration limit for `hasPartialFlow` and `hasPartialFlowRev`
+   * measured in approximate number of interprocedural steps.
+   */
+  deprecated int explorationLimit() { none() }
+
   /**
    * Holds if hidden nodes should be included in the data flow graph.
    *
@@ -282,9 +290,15 @@ deprecated private module Config implements FullStateConfigSig {
 
   FlowFeature getAFeature() { result = any(Configuration config).getAFeature() }
 
-  predicate includeHiddenNodes() { any(Configuration config).includeHiddenNodes() }
+  predicate sourceGrouping(Node source, string sourceGroup) {
+    any(Configuration config).sourceGrouping(source, sourceGroup)
+  }
 
-  predicate observeDiffInformedIncrementalMode() { none() }
+  predicate sinkGrouping(Node sink, string sinkGroup) {
+    any(Configuration config).sinkGrouping(sink, sinkGroup)
+  }
+
+  predicate includeHiddenNodes() { any(Configuration config).includeHiddenNodes() }
 }
 
 deprecated private import Impl<Config> as I

cpp/ql/lib/semmle/code/cpp/ir/dataflow/internal/DataFlowPrivate.qll

@@ -1328,10 +1328,7 @@ predicate lambdaCreation(Node creation, LambdaCallKind kind, DataFlowCallable c)
 
 /** Holds if `call` is a lambda call of kind `kind` where `receiver` is the lambda expression. */
 predicate lambdaCall(DataFlowCall call, LambdaCallKind kind, Node receiver) {
-  (
-    call.(SummaryCall).getReceiver() = receiver.(FlowSummaryNode).getSummaryNode() or
-    call.asCallInstruction().getCallTargetOperand() = receiver.asOperand()
-  ) and
+  call.(SummaryCall).getReceiver() = receiver.(FlowSummaryNode).getSummaryNode() and
   exists(kind)
 }
 

cpp/ql/lib/semmle/code/cpp/ir/dataflow/internal/DataFlowUtil.qll

@@ -17,7 +17,6 @@ private import SsaInternals as Ssa
 private import DataFlowImplCommon as DataFlowImplCommon
 private import codeql.util.Unit
 private import Node0ToString
-private import DataFlowDispatch as DataFlowDispatch
 import ExprNodes
 
 /**
@@ -2498,16 +2497,3 @@ class AdditionalCallTarget extends Unit {
    */
   abstract Declaration viableTarget(Call call);
 }
-
-/**
- * Gets a function that may be called by `call`.
- *
- * Note that `call` may be a call to a function pointer expression.
- */
-Function getARuntimeTarget(Call call) {
-  exists(DataFlowCall dfCall | dfCall.asCallInstruction().getUnconvertedResultExpression() = call |
-    result = DataFlowDispatch::viableCallable(dfCall).asSourceCallable()
-    or
-    result = DataFlowImplCommon::viableCallableLambda(dfCall, _).asSourceCallable()
-  )
-}

cpp/ql/lib/semmle/code/cpp/ir/dataflow/internal/ProductFlow.qll

@@ -546,7 +546,7 @@ module ProductFlow {
       Flow1::PathGraph::edges(pred1, succ1, _, _) and
       exists(ReturnKindExt returnKind |
         succ1.getNode() = returnKind.getAnOutNode(call) and
-        returnKind = getParamReturnPosition(_, pred1.asParameterReturnNode()).getKind()
+        paramReturnNode(_, pred1.asParameterReturnNode(), _, returnKind)
       )
     }
 
@@ -574,7 +574,7 @@ module ProductFlow {
       Flow2::PathGraph::edges(pred2, succ2, _, _) and
       exists(ReturnKindExt returnKind |
         succ2.getNode() = returnKind.getAnOutNode(call) and
-        returnKind = getParamReturnPosition(_, pred2.asParameterReturnNode()).getKind()
+        paramReturnNode(_, pred2.asParameterReturnNode(), _, returnKind)
       )
     }
 

cpp/ql/lib/semmle/code/cpp/ir/implementation/aliased_ssa/IRVariable.qll

@@ -50,6 +50,9 @@ abstract private class AbstractIRVariable extends TIRVariable {
    */
   abstract Language::AST getAst();
 
+  /** DEPRECATED: Alias for getAst */
+  deprecated Language::AST getAST() { result = this.getAst() }
+
   /**
    * Gets an identifier string for the variable. This identifier is unique
    * within the function.
@@ -93,6 +96,9 @@ class IRUserVariable extends AbstractIRVariable, TIRUserVariable {
 
   final override Language::AST getAst() { result = var }
 
+  /** DEPRECATED: Alias for getAst */
+  deprecated override Language::AST getAST() { result = this.getAst() }
+
   final override string getUniqueId() {
     result = this.getVariable().toString() + " " + this.getVariable().getLocation().toString()
   }
@@ -157,6 +163,9 @@ abstract private class AbstractIRGeneratedVariable extends AbstractIRVariable {
 
   final override Language::AST getAst() { result = ast }
 
+  /** DEPRECATED: Alias for getAst */
+  deprecated override Language::AST getAST() { result = this.getAst() }
+
   override string toString() { result = this.getBaseString() + this.getLocationString() }
 
   override string getUniqueId() { none() }

cpp/ql/lib/semmle/code/cpp/ir/implementation/aliased_ssa/PrintIR.qll

@@ -6,112 +6,6 @@
  * uses, however, it is better to write a query that imports `PrintIR.qll`, extends
  * `PrintIRConfiguration`, and overrides `shouldPrintDeclaration()` to select a subset of declarations
  * to dump.
- *
- * Anatomy of a printed IR instruction
- *
- * An instruction:
- *
- * ```
- * # 2281|     v2281_19(void) = Call[~String]     : func:r2281_18, this:r2281_17
- * ```
- *
- * The prefix `# 2281|` specifies that this instruction was generated by the C++ source code on line 2281.
- * Scrolling up in the printed output, one will eventually find the name of the file to which the line
- * belongs.
- *
- * `v2281_19(void)` is the result of the instruction. Here, `v` means this is a void result or operand (so
- * there should be no later uses of the result; see below for other possible values). The `2281_19` is a
- * unique ID for the result. This is usually just the line number plus a small integer suffix to make it
- * unique within the function. The type of the result is `void`. In this case, it is `void`, because
- * `~String` returns `void`. The type of the result is usually just the name of the appropriate C++ type,
- * but it will sometimes be a type like `glval<int>`, which means result holds a glvalue, which at the
- * IR level works like a pointer. In other words, in the source code the type was `int`, but it is really
- * more like an `int*`. We see this, for example, in `x = y;`, where `x` is a glvalue.
- *
- * `Call` is the opcode of the instruction. Common opcodes include:
- *
- * * Arithmetic operations: `Add`, `Sub`, `Mul`, etc.
- * * Memory access operations: `Load`, `Store`.
- * * Function calls: `Call`.
- * * Literals: `Constant`.
- * * Variable addresses: `VariableAddress`.
- * * Function entry points: `EnterFunction`.
- * * Return from a function: `Return`, `ReturnVoid`. Note that the value being returned is set separately by a
- *   `Store` to a special `#return` variable.
- * * Stack unwinding for C++ function that throw and where the exception escapes the function: `Unwind`.
- * * Common exit point for `Unwind` and `Return`: `ExitFunction`.
- * * SSA-related opcodes: `Phi`, `Chi`.
- *
- * `[~String]` denotes additional information. The information might be present earlier in the IR, as is the case
- * for `Call`, where it is the name of the called function. This is also the case for `Load` and `Store`, where it
- * is the name of the variable that loaded or stored (if known). In the case of `Constant`, `FieldAddress`, and
- * `VariableAddress`, the information between brackets does not occur earlier.
- *
- * `func:r2281_18` and `this:r28281_17` are the operands of the instruction. The `func:` prefix denotes the operand
- * that holds the address of the called function. The `this:` prefix denotes the argument to the special `this`
- * parameter of an instance member function. `r2281_18`, `r2281_17` are the unique IDs of the operands. Each of these
- * matches the ID of a previously seen result, showing where that value came from. The `r` means that these are
- * "register" operands (see below).
- *
- * Result and operand kinds:
- *
- * Every result and operand is one of these three kinds:
- *
- * * `r` "register". These operands are not stored in any particular memory location. We can think of them as
- *   temporary values created during the evaluation of an expression. A register operand almost always has one
- *   use, often in the same block as its definition.
- * *  `m` "memory". These operands represents accesses to a specific memory location. The location could be a
- *    local variable, a global variable, a field of an object, an element of an array, or any memory that we happen
- *    to have a pointer to. These only occur as the result of a `Store`, the source operand of a `Load` or on the
- *    SSA instructions (`Phi`, `Chi`).
- * * `v` "void". Really just a register operand, but we mark register operands of type void with this special prefix
- *   so we know that there is no actual value there.
- *
- * Branches in the IR:
- *
- * The IR is divided into basic blocks. At the end of each block, there are one or more edges showing the possible
- * control flow successors of the block.
- *
- * ```
- * #   44|     v44_3(void)    = ConditionalBranch : r44_2
- * #-----|   False -> Block 4
- * #-----|   True -> Block 3
- * ```
- * Here we have a block that ends with a conditional branch. The two edges show where the control flows to depending
- * on whether the condition is true or false.
- *
- * SSA instructions:
- *
- * We use `Phi` instructions in SSA to create a single definition for a variable that might be assigned on multiple
- * control flow paths. The `Phi` instruction merges the potential values of that variable from each predecessor edge,
- * and the resulting definition is then used wherever that variable is accessed later on.
- *
- * When dealing with aliased memory, we use the `Chi` instruction to create a single definition for memory that might
- * or might not have been updated by a store, depending on the actual address that was written to. For example, take:
- *
- * ```cpp
- * int x = 5;
- * int y = 7;
- * int* p = condition ? &x : &y;
- * *p = 6;
- * return x;
- * ```
- *
- * At the point where we store to `*p`, we do not know whether `p` points to `x` or `y`. Thus, we do not know whether
- * `return x;` is going to return the value that `x` was originally initialized to (5), or whether it will return 6,
- *  because it was overwritten by `*p = 6;`. We insert a `Chi` instruction immediately after the store to `*p`:
- *
- * ```
- * r2(int)     = Constant[6]
- * r3(int*)    = <<value of p>>
- * m4(int)     = Store           : &r3, r2  // Stores the constant 6 to *p
- * m5(unknown) = Chi             : total:m1, partial:m4
- * ```
- * The `partial:` operand represents the memory that was just stored. The `total:` operand represents the previous
- * contents of all of the memory that `p` might have pointed to (in this case, both `x` and `y`). The result of the
- * `Chi` represents the new contents of whatever memory the `total:` operand referred to. We usually do not know exactly
- * which parts of that memory were overwritten, but it does model that any of that memory could have been modified, so
- * that later instructions do not assume that the memory was unchanged.
  */
 
 private import internal.IRInternal

cpp/ql/lib/semmle/code/cpp/ir/implementation/aliased_ssa/internal/AliasedSSA.qll

@@ -285,6 +285,9 @@ abstract private class MemoryLocation0 extends TMemoryLocation {
   predicate isAlwaysAllocatedOnStack() { none() }
 
   final predicate canReuseSsa() { none() }
+
+  /** DEPRECATED: Alias for canReuseSsa */
+  deprecated predicate canReuseSSA() { this.canReuseSsa() }
 }
 
 /**
@@ -683,13 +686,8 @@ private Overlap getExtentOverlap(MemoryLocation0 def, MemoryLocation0 use) {
     def.getVirtualVariable() = use.getVirtualVariable() and
     def instanceof EntireAllocationMemoryLocation and
     (
-      // EntireAllocationMemoryLocation exactly overlaps any EntireAllocationMemoryLocation for the
-      // same allocation. Checking the allocation, rather than the memory location itself, ensures
-      // that we get the right relationship between the "must" and "may" memory locations for that
-      // allocation.
-      // Note that if one of the locations is a "may" access, the overlap will be downgraded to
-      // `MustTotallyOverlap` or `MayPartialOverlap` in `getOverlap()`.
-      use.(EntireAllocationMemoryLocation).getAnAllocation() = def.getAnAllocation() and
+      // EntireAllocationMemoryLocation exactly overlaps itself.
+      use instanceof EntireAllocationMemoryLocation and
       result instanceof MustExactlyOverlap
       or
       not use instanceof EntireAllocationMemoryLocation and

cpp/ql/lib/semmle/code/cpp/ir/implementation/raw/IRVariable.qll

@@ -50,6 +50,9 @@ abstract private class AbstractIRVariable extends TIRVariable {
    */
   abstract Language::AST getAst();
 
+  /** DEPRECATED: Alias for getAst */
+  deprecated Language::AST getAST() { result = this.getAst() }
+
   /**
    * Gets an identifier string for the variable. This identifier is unique
    * within the function.
@@ -93,6 +96,9 @@ class IRUserVariable extends AbstractIRVariable, TIRUserVariable {
 
   final override Language::AST getAst() { result = var }
 
+  /** DEPRECATED: Alias for getAst */
+  deprecated override Language::AST getAST() { result = this.getAst() }
+
   final override string getUniqueId() {
     result = this.getVariable().toString() + " " + this.getVariable().getLocation().toString()
   }
@@ -157,6 +163,9 @@ abstract private class AbstractIRGeneratedVariable extends AbstractIRVariable {
 
   final override Language::AST getAst() { result = ast }
 
+  /** DEPRECATED: Alias for getAst */
+  deprecated override Language::AST getAST() { result = this.getAst() }
+
   override string toString() { result = this.getBaseString() + this.getLocationString() }
 
   override string getUniqueId() { none() }

cpp/ql/lib/semmle/code/cpp/ir/implementation/raw/PrintIR.qll

@@ -6,112 +6,6 @@
  * uses, however, it is better to write a query that imports `PrintIR.qll`, extends
  * `PrintIRConfiguration`, and overrides `shouldPrintDeclaration()` to select a subset of declarations
  * to dump.
- *
- * Anatomy of a printed IR instruction
- *
- * An instruction:
- *
- * ```
- * # 2281|     v2281_19(void) = Call[~String]     : func:r2281_18, this:r2281_17
- * ```
- *
- * The prefix `# 2281|` specifies that this instruction was generated by the C++ source code on line 2281.
- * Scrolling up in the printed output, one will eventually find the name of the file to which the line
- * belongs.
- *
- * `v2281_19(void)` is the result of the instruction. Here, `v` means this is a void result or operand (so
- * there should be no later uses of the result; see below for other possible values). The `2281_19` is a
- * unique ID for the result. This is usually just the line number plus a small integer suffix to make it
- * unique within the function. The type of the result is `void`. In this case, it is `void`, because
- * `~String` returns `void`. The type of the result is usually just the name of the appropriate C++ type,
- * but it will sometimes be a type like `glval<int>`, which means result holds a glvalue, which at the
- * IR level works like a pointer. In other words, in the source code the type was `int`, but it is really
- * more like an `int*`. We see this, for example, in `x = y;`, where `x` is a glvalue.
- *
- * `Call` is the opcode of the instruction. Common opcodes include:
- *
- * * Arithmetic operations: `Add`, `Sub`, `Mul`, etc.
- * * Memory access operations: `Load`, `Store`.
- * * Function calls: `Call`.
- * * Literals: `Constant`.
- * * Variable addresses: `VariableAddress`.
- * * Function entry points: `EnterFunction`.
- * * Return from a function: `Return`, `ReturnVoid`. Note that the value being returned is set separately by a
- *   `Store` to a special `#return` variable.
- * * Stack unwinding for C++ function that throw and where the exception escapes the function: `Unwind`.
- * * Common exit point for `Unwind` and `Return`: `ExitFunction`.
- * * SSA-related opcodes: `Phi`, `Chi`.
- *
- * `[~String]` denotes additional information. The information might be present earlier in the IR, as is the case
- * for `Call`, where it is the name of the called function. This is also the case for `Load` and `Store`, where it
- * is the name of the variable that loaded or stored (if known). In the case of `Constant`, `FieldAddress`, and
- * `VariableAddress`, the information between brackets does not occur earlier.
- *
- * `func:r2281_18` and `this:r28281_17` are the operands of the instruction. The `func:` prefix denotes the operand
- * that holds the address of the called function. The `this:` prefix denotes the argument to the special `this`
- * parameter of an instance member function. `r2281_18`, `r2281_17` are the unique IDs of the operands. Each of these
- * matches the ID of a previously seen result, showing where that value came from. The `r` means that these are
- * "register" operands (see below).
- *
- * Result and operand kinds:
- *
- * Every result and operand is one of these three kinds:
- *
- * * `r` "register". These operands are not stored in any particular memory location. We can think of them as
- *   temporary values created during the evaluation of an expression. A register operand almost always has one
- *   use, often in the same block as its definition.
- * *  `m` "memory". These operands represents accesses to a specific memory location. The location could be a
- *    local variable, a global variable, a field of an object, an element of an array, or any memory that we happen
- *    to have a pointer to. These only occur as the result of a `Store`, the source operand of a `Load` or on the
- *    SSA instructions (`Phi`, `Chi`).
- * * `v` "void". Really just a register operand, but we mark register operands of type void with this special prefix
- *   so we know that there is no actual value there.
- *
- * Branches in the IR:
- *
- * The IR is divided into basic blocks. At the end of each block, there are one or more edges showing the possible
- * control flow successors of the block.
- *
- * ```
- * #   44|     v44_3(void)    = ConditionalBranch : r44_2
- * #-----|   False -> Block 4
- * #-----|   True -> Block 3
- * ```
- * Here we have a block that ends with a conditional branch. The two edges show where the control flows to depending
- * on whether the condition is true or false.
- *
- * SSA instructions:
- *
- * We use `Phi` instructions in SSA to create a single definition for a variable that might be assigned on multiple
- * control flow paths. The `Phi` instruction merges the potential values of that variable from each predecessor edge,
- * and the resulting definition is then used wherever that variable is accessed later on.
- *
- * When dealing with aliased memory, we use the `Chi` instruction to create a single definition for memory that might
- * or might not have been updated by a store, depending on the actual address that was written to. For example, take:
- *
- * ```cpp
- * int x = 5;
- * int y = 7;
- * int* p = condition ? &x : &y;
- * *p = 6;
- * return x;
- * ```
- *
- * At the point where we store to `*p`, we do not know whether `p` points to `x` or `y`. Thus, we do not know whether
- * `return x;` is going to return the value that `x` was originally initialized to (5), or whether it will return 6,
- *  because it was overwritten by `*p = 6;`. We insert a `Chi` instruction immediately after the store to `*p`:
- *
- * ```
- * r2(int)     = Constant[6]
- * r3(int*)    = <<value of p>>
- * m4(int)     = Store           : &r3, r2  // Stores the constant 6 to *p
- * m5(unknown) = Chi             : total:m1, partial:m4
- * ```
- * The `partial:` operand represents the memory that was just stored. The `total:` operand represents the previous
- * contents of all of the memory that `p` might have pointed to (in this case, both `x` and `y`). The result of the
- * `Chi` represents the new contents of whatever memory the `total:` operand referred to. We usually do not know exactly
- * which parts of that memory were overwritten, but it does model that any of that memory could have been modified, so
- * that later instructions do not assume that the memory was unchanged.
  */
 
 private import internal.IRInternal

cpp/ql/lib/semmle/code/cpp/ir/implementation/raw/internal/TranslatedCall.qll

@@ -216,6 +216,9 @@ abstract class TranslatedSideEffects extends TranslatedElement {
 
   final override Locatable getAst() { result = this.getExpr() }
 
+  /** DEPRECATED: Alias for getAst */
+  deprecated override Locatable getAST() { result = this.getAst() }
+
   final override Declaration getFunction() { result = getEnclosingDeclaration(this.getExpr()) }
 
   final override TranslatedElement getChild(int i) {
@@ -613,6 +616,9 @@ class TranslatedArgumentExprSideEffect extends TranslatedArgumentSideEffect,
 
   final override Locatable getAst() { result = arg }
 
+  /** DEPRECATED: Alias for getAst */
+  deprecated override Locatable getAST() { result = this.getAst() }
+
   final override Type getIndirectionType() {
     result = arg.getUnspecifiedType().(DerivedType).getBaseType()
     or
@@ -645,6 +651,9 @@ class TranslatedStructorQualifierSideEffect extends TranslatedArgumentSideEffect
 
   final override Locatable getAst() { result = call }
 
+  /** DEPRECATED: Alias for getAst */
+  deprecated override Locatable getAST() { result = this.getAst() }
+
   final override Type getIndirectionType() { result = call.getTarget().getDeclaringType() }
 
   final override string getArgString() { result = "this" }
@@ -666,6 +675,9 @@ class TranslatedCallSideEffect extends TranslatedSideEffect, TTranslatedCallSide
 
   override Locatable getAst() { result = expr }
 
+  /** DEPRECATED: Alias for getAst */
+  deprecated override Locatable getAST() { result = this.getAst() }
+
   override Expr getPrimaryExpr() { result = expr }
 
   override predicate sortOrder(int group, int indexInGroup) {
@@ -704,6 +716,9 @@ class TranslatedAllocationSideEffect extends TranslatedSideEffect, TTranslatedAl
 
   override Locatable getAst() { result = expr }
 
+  /** DEPRECATED: Alias for getAst */
+  deprecated override Locatable getAST() { result = this.getAst() }
+
   override Expr getPrimaryExpr() { result = expr }
 
   override predicate sortOrder(int group, int indexInGroup) {

cpp/ql/lib/semmle/code/cpp/ir/implementation/raw/internal/TranslatedCondition.qll

@@ -29,6 +29,9 @@ abstract class TranslatedCondition extends TranslatedElement {
 
   final override Locatable getAst() { result = expr }
 
+  /** DEPRECATED: Alias for getAst */
+  deprecated override Locatable getAST() { result = this.getAst() }
+
   final ConditionContext getConditionContext() { result = this.getParent() }
 
   final Expr getExpr() { result = expr }

cpp/ql/lib/semmle/code/cpp/ir/implementation/raw/internal/TranslatedDeclarationEntry.qll

@@ -45,6 +45,9 @@ abstract class TranslatedDeclarationEntry extends TranslatedElement, TTranslated
   final override string toString() { result = entry.toString() }
 
   final override Locatable getAst() { result = entry.getAst() }
+
+  /** DEPRECATED: Alias for getAst */
+  deprecated override Locatable getAST() { result = this.getAst() }
 }
 
 /**
@@ -245,6 +248,9 @@ class TranslatedStaticLocalVariableInitialization extends TranslatedElement,
 
   final override Locatable getAst() { result = entry.getAst() }
 
+  /** DEPRECATED: Alias for getAst */
+  deprecated override Locatable getAST() { result = this.getAst() }
+
   final override LocalVariable getVariable() { result = var }
 
   final override Declaration getFunction() { result = var.getFunction() }
@@ -271,6 +277,9 @@ class TranslatedConditionDecl extends TranslatedLocalVariableDeclaration, TTrans
 
   override Locatable getAst() { result = conditionDeclExpr }
 
+  /** DEPRECATED: Alias for getAst */
+  deprecated override Locatable getAST() { result = this.getAst() }
+
   override Declaration getFunction() { result = getEnclosingFunction(conditionDeclExpr) }
 
   override LocalVariable getVariable() { result = conditionDeclExpr.getVariable() }