Codegen/Rust: allow renaming in QL

This adds a `ql.name` codegen pragma to change the name of a property on
the QL side. This is useful to give more meaningful names than what we
get from the generated rust AST.

misc/codegen/generators/qlgen.py

@@ -118,17 +118,18 @@ def get_ql_property(cls: schema.Class, prop: schema.Property, lookup: typing.Dic
         type_is_hideable="ql_hideable" in lookup[prop.type].pragmas if prop.type in lookup else False,
         internal="ql_internal" in prop.pragmas,
     )
+    ql_name = prop.pragmas.get("ql_name", prop.name)
     if prop.is_single:
         args.update(
-            singular=inflection.camelize(prop.name),
+            singular=inflection.camelize(ql_name),
             tablename=inflection.tableize(cls.name),
             tableparams=["this"] + ["result" if p is prop else "_" for p in cls.properties if p.is_single],
             doc=_get_doc(cls, prop),
         )
     elif prop.is_repeated:
         args.update(
-            singular=inflection.singularize(inflection.camelize(prop.name)),
+            singular=inflection.singularize(inflection.camelize(ql_name)),
-            plural=inflection.pluralize(inflection.camelize(prop.name)),
+            plural=inflection.pluralize(inflection.camelize(ql_name)),
             tablename=inflection.tableize(f"{cls.name}_{prop.name}"),
             tableparams=["this", "index", "result"] if not prop.is_unordered else ["this", "result"],
             doc=_get_doc(cls, prop, plural=False),
@@ -136,14 +137,14 @@ def get_ql_property(cls: schema.Class, prop: schema.Property, lookup: typing.Dic
         )
     elif prop.is_optional:
         args.update(
-            singular=inflection.camelize(prop.name),
+            singular=inflection.camelize(ql_name),
             tablename=inflection.tableize(f"{cls.name}_{prop.name}"),
             tableparams=["this", "result"],
             doc=_get_doc(cls, prop),
         )
     elif prop.is_predicate:
         args.update(
-            singular=inflection.camelize(prop.name, uppercase_first_letter=False),
+            singular=inflection.camelize(ql_name, uppercase_first_letter=False),
             tablename=inflection.underscore(f"{cls.name}_{prop.name}"),
             tableparams=["this"],
             doc=_get_doc(cls, prop),
@@ -154,6 +155,8 @@ def get_ql_property(cls: schema.Class, prop: schema.Property, lookup: typing.Dic
 
 
 def get_ql_class(cls: schema.Class, lookup: typing.Dict[str, schema.Class]) -> ql.Class:
+    if "ql_name" in cls.pragmas:
+        raise Error("ql_name is not supported yet for classes, only for properties")
     prev_child = ""
     properties = []
     for p in cls.properties:

misc/codegen/lib/schemadefs.py

@@ -72,11 +72,11 @@ def include(source: str):
 @_dataclass
 class _Namespace:
     """ simple namespacing mechanism """
-    name: str
+    _name: str
 
     def add(self, pragma: "_PragmaBase", key: str | None = None):
         self.__dict__[pragma.pragma] = pragma
-        pragma.pragma = key or f"{self.name}_{pragma.pragma}"
+        pragma.pragma = key or f"{self._name}_{pragma.pragma}"
 
 
 @_dataclass
@@ -87,7 +87,7 @@ class _SynthModifier(_schema.PropertyModifier, _Namespace):
         prop.synth = self.synth
 
     def negate(self) -> _schema.PropertyModifier:
-        return _SynthModifier(self.name, False)
+        return _SynthModifier(self._name, False)
 
 
 qltest = _Namespace("qltest")
@@ -239,6 +239,7 @@ qltest.add(_ParametrizedClassPragma("test_with", inherited=True, factory=_schema
 ql.add(_ParametrizedClassPragma("default_doc_name", factory=lambda doc: doc))
 ql.add(_ClassPragma("hideable", inherited=True))
 ql.add(_Pragma("internal"))
+ql.add(_ParametrizedPragma("name", factory=lambda name: name))
 
 cpp.add(_Pragma("skip"))
 
@@ -256,30 +257,24 @@ synth.add(_ParametrizedClassPragma("on_arguments", factory=lambda **kwargs:
                                    _schema.SynthInfo(on_arguments={k: _schema.get_type_name(t) for k, t in kwargs.items()})), key="synth")
 
 
+@_dataclass(frozen=True)
 class _PropertyModifierList(_schema.PropertyModifier):
-    def __init__(self):
+    _mods: tuple[_schema.PropertyModifier, ...]
-        self._mods = []
 
     def __or__(self, other: _schema.PropertyModifier):
-        self._mods.append(other)
+        return _PropertyModifierList(self._mods + (other,))
-        return self
 
     def modify(self, prop: Property):
         for m in self._mods:
             m.modify(prop)
 
 
-class _PropertyAnnotation:
+_ = _PropertyModifierList(())
-    def __or__(self, other: _schema.PropertyModifier):
-        return _PropertyModifierList() | other
-
-
-_ = _PropertyAnnotation()
 
 drop = object()
 
 
-def annotate(annotated_cls: type, add_bases: _Iterable[type] | None = None, replace_bases: _Dict[type, type] | None = None, cfg: bool = False) -> _Callable[[type], _PropertyAnnotation]:
+def annotate(annotated_cls: type, add_bases: _Iterable[type] | None = None, replace_bases: _Dict[type, type] | None = None, cfg: bool = False) -> _Callable[[type], _PropertyModifierList]:
     """
     Add or modify schema annotations after a class has been defined previously.
 
@@ -287,7 +282,7 @@ def annotate(annotated_cls: type, add_bases: _Iterable[type] | None = None, repl
 
     `replace_bases` can be used to replace bases on the annotated class.
     """
-    def decorator(cls: type) -> _PropertyAnnotation:
+    def decorator(cls: type) -> _PropertyModifierList:
         if cls.__name__ != "_":
             raise _schema.Error("Annotation classes must be named _")
         if cls.__doc__ is not None:
@@ -307,7 +302,7 @@ def annotate(annotated_cls: type, add_bases: _Iterable[type] | None = None, repl
                 del annotated_cls.__annotations__[p]
             elif p in annotated_cls.__annotations__:
                 annotated_cls.__annotations__[p] |= a
-            elif isinstance(a, (_PropertyAnnotation, _PropertyModifierList)):
+            elif isinstance(a, (_PropertyModifierList, _PropertyModifierList)):
                 raise _schema.Error(f"annotated property {p} not present in annotated class "
                                     f"{annotated_cls.__name__}")
             else:

rust/ql/.generated.list

@@ -1,4 +1,4 @@
-lib/codeql/rust/controlflow/internal/generated/CfgNodes.qll e1d6ad3a582c15addb042ce1e054a916f81030f7a10a69408ab929679e9a92ad f1837efe28fb1ae5162437a482d35d24a792e133e10879284202c45e90c62ff6
+lib/codeql/rust/controlflow/internal/generated/CfgNodes.qll c0438ab3e984fbf7ce2cc4ac64aafa115f36f2be700a819fd81f15d777f363b6 bc57c07b7f9472156cff3f878459872255c7ee4ba0767258129d0258789f98df
 lib/codeql/rust/elements/Abi.qll 4c973d28b6d628f5959d1f1cc793704572fd0acaae9a97dfce82ff9d73f73476 250f68350180af080f904cd34cb2af481c5c688dc93edf7365fd0ae99855e893
 lib/codeql/rust/elements/ArgList.qll 661f5100f5d3ef8351452d9058b663a2a5c720eea8cf11bedd628969741486a2 28e424aac01a90fb58cd6f9f83c7e4cf379eea39e636bc0ba07efc818be71c71
 lib/codeql/rust/elements/ArrayExpr.qll a3e6e122632f4011644ec31b37f88b32fe3f2b7e388e7e878a6883309937049f 12ccb5873d95c433da5606fd371d182ef2f71b78d0c53c2d6dec10fa45852bdc
@@ -495,7 +495,7 @@ lib/codeql/rust/elements/internal/generated/MacroStmts.qll cb4f3c2721a4d0c8522e5
 lib/codeql/rust/elements/internal/generated/MacroType.qll c462824df4a002956c036966d15cd0bce206e664888f8d0c7834dedb38b3c0bf 947480f07c40128ef3d00ad4c3a29a685472b3e20a661680c22f6bb318205ed1
 lib/codeql/rust/elements/internal/generated/MatchArm.qll 8fb740a0f2e308782d9cf390672969cd7cf6e698e5b847fb02ae3fa6c205646f 42bfe8dd94fc24ec925fbd44016df111600f99d1216c9a698631373bb6048830
 lib/codeql/rust/elements/internal/generated/MatchArmList.qll 13362680c037fe83fef4653562cc10a4429078316b5ec7c47b076336cf4aca2e 41c674293c13eceaca62134ae0c6778541f6a5201cbc5c146f0ba01b898dc267
-lib/codeql/rust/elements/internal/generated/MatchExpr.qll 689d65f690fe05bc262d0a5bfe69bb4f8a142db387c5765fcc4958a9b49989f8 2979cd2017d0538870d17b2b7592c75cc05b706bd36c9de3e5dc38fa3a957e5b
+lib/codeql/rust/elements/internal/generated/MatchExpr.qll e1e5bf4623511028a6c2ebc6bb6e3c18ec9fe4f49ef4cd8654e5dc376121088d c0760592040b2df9a571cd766397a0f9c68684d24d72780756cae7a1878d102a
 lib/codeql/rust/elements/internal/generated/MatchGuard.qll 521a507883963106780f1782084c581fbcf1179863c7c15438c4db79e30e78dd 6226feffaaa8d828a42ece0c693e616cd375672eb987c3b7ff1ca15fa23c116a
 lib/codeql/rust/elements/internal/generated/Meta.qll 38fca2c9958b4179de311546fe0850319010aca9cd17c97d57e12b521c5d0947 740f99c9d41044ceebfcc9d29baaa22f59c11a40f45502a34aa587d423c018f8
 lib/codeql/rust/elements/internal/generated/MethodCallExpr.qll 17bffcc826851a8be32a1900b8fdf777f9bab6aed9f8268d566173c4974c1cf9 134a2860bdf16daafdb3e574c52a69d2598210653db89c2fa062ca25e8f8a649
@@ -512,7 +512,7 @@ lib/codeql/rust/elements/internal/generated/ParamList.qll c808c9d84dd7800573832b
 lib/codeql/rust/elements/internal/generated/ParenExpr.qll bc0731505bfe88516205ec360582a4222d2681d11342c93e15258590ddee82f2 d4bd6e0c80cf1d63746c88d4bcb3a01d4c75732e5da09e3ebd9437ced227fb60
 lib/codeql/rust/elements/internal/generated/ParenPat.qll ce24b8f8ecbf0f204af200317405724063887257460c80cf250c39b2fdf37185 e7c87d37e1a0ca7ea03840017e1aa9ddb7f927f1f3b6396c0305b46aeee33db6
 lib/codeql/rust/elements/internal/generated/ParenType.qll 9cc954d73f8330dcac7b475f97748b63af5c8766dee9d2f2872c0a7e4c903537 c07534c8a9c683c4a9b11d490095647e420de0a0bfc23273eaf6f31b00244273
-lib/codeql/rust/elements/internal/generated/ParentChild.qll ae0288399423b8b69a98a520ff4d2cb53d15ec404696cf62b0ceea965e2258ba aed73c416d74b504c02ee2e9bc2a72881d851ad0819b331b59728a4084e14fdd
+lib/codeql/rust/elements/internal/generated/ParentChild.qll a19adfe192c88023b77f938d91f8539df6e42fa14172389537069decfe8baa7d 6be35ca8755d80c0365eeb9ecc51982fb0e24d2ed53ec6b17a15da4af6fbe6e6
 lib/codeql/rust/elements/internal/generated/Pat.qll 3605ac062be2f294ee73336e9669027b8b655f4ad55660e1eab35266275154ee 7f9400db2884d336dd1d21df2a8093759c2a110be9bf6482ce8e80ae0fd74ed4
 lib/codeql/rust/elements/internal/generated/Path.qll 4c1c8e840ed57880e574142b081b11d7a7428a009f10e3aa8f4645e211f6b2e0 989668cf0f1bdee7557e2f97c01e41d2a56848227fed41477833f5fc1e1d35f6
 lib/codeql/rust/elements/internal/generated/PathExpr.qll 2096e3c1db22ee488a761690adabfc9cfdea501c99f7c5d96c0019cb113fc506 54245ce0449c4e263173213df01e079d5168a758503a5dbd61b25ad35a311140
@@ -525,7 +525,7 @@ lib/codeql/rust/elements/internal/generated/PtrType.qll 40099c5a4041314b66932dfd
 lib/codeql/rust/elements/internal/generated/PureSynthConstructors.qll ea294a3ba33fd1bc632046c4fedbcb84dcb961a8e4599969d65893b19d90e590 ea294a3ba33fd1bc632046c4fedbcb84dcb961a8e4599969d65893b19d90e590
 lib/codeql/rust/elements/internal/generated/RangeExpr.qll 23cca03bf43535f33b22a38894f70d669787be4e4f5b8fe5c8f7b964d30e9027 18624cef6c6b679eeace2a98737e472432e0ead354cca02192b4d45330f047c9
 lib/codeql/rust/elements/internal/generated/RangePat.qll efd93730de217cf50dcba5875595263a5eadf9f7e4e1272401342a094d158614 229b251b3d118932e31e78ac4dfb75f48b766f240f20d436062785606d44467b
-lib/codeql/rust/elements/internal/generated/Raw.qll ee5642a7a5ad75f48d4db10eccb197b1a11db2fc3432cf2e24a8bcbe83a474e2 134f2e0c87039d052dd31991017fb35597f37f28879abd702b62ec1d880118c6
+lib/codeql/rust/elements/internal/generated/Raw.qll f1af475812318f9fbfd1731a1e97ae77783bcc8a7ad45463cd9916e4c46e783a 1e06a7cd87c4c704f76bbc70ba3d7601ca6f1b3dd11f124ee448d8b834f7ce55
 lib/codeql/rust/elements/internal/generated/RecordExpr.qll eb6cb662e463f9260efae1a6ce874fa781172063b916ef1963f861e9942d308d 1a21cbccc8f3799ff13281e822818ebfb21d81591720a427cac3625512cb9d40
 lib/codeql/rust/elements/internal/generated/RecordExprField.qll 7e9f8663d3b74ebbc9603b10c9912f082febba6bd73d344b100bbd3edf837802 fbe6b578e7fd5d5a6f21bbb8c388957ab7210a6a249ec71510a50fb35b319ea1
 lib/codeql/rust/elements/internal/generated/RecordExprFieldList.qll 179a97211fe7aa6265085d4d54115cdbc0e1cd7c9b2135591e8f36d6432f13d3 dd44bbbc1e83a1ed3a587afb729d7debf7aeb7b63245de181726af13090e50c0
@@ -845,10 +845,10 @@ test/extractor-tests/generated/MatchArm/MatchArm_getPat.ql b346bca229226414b32ac
 test/extractor-tests/generated/MatchArmList/MatchArmList.ql 14b5e110d48e2b77c85b7a188262e6a98300e0d4d507bb7ed9179c5802251dd6 4d091f06b12fef0fffe1c80a10f74438d8068f2fa09c50d5e240b6d140e60d90
 test/extractor-tests/generated/MatchArmList/MatchArmList_getArm.ql 4781d002538a92b7f40fb0ec3d61aeedb6348341ddc354bbdd3ff61b74d59767 ae0da9497a30ce006e03bdb70e0ee24b685df529ac15a7d99a6869b5f7d7b371
 test/extractor-tests/generated/MatchArmList/MatchArmList_getAttr.ql 4d7e6d152d2dbeb4c9f594becabea27d3b25fecbde40d791a2907c69cc0c9631 4be9be658bb22e1b764c4ebc8d6b99bf50fd939f35ea44fbb869056c14632bd4
-test/extractor-tests/generated/MatchExpr/MatchExpr.ql ec116bca37079488977a50beeba508c440cf337799947fcb810b6bd7a7605255 42dc7b5f0dd6fd91417d9846a7b4f678cbfcf095791aaf57c8d3b4548ce2dd98
+test/extractor-tests/generated/MatchExpr/MatchExpr.ql 22a3ace49ec98524388ccfb031c180eedc741cbc5b58a4815cc9e52fe292e6b3 5b56c71cbc02ac3aecfcbe93e7bbdb55727aae39d7949a7d8db3d6f93ea7ca80
 test/extractor-tests/generated/MatchExpr/MatchExpr_getAttr.ql cb8057372dcf24dfa02896ebf4e60a0b757dc4742b94011edc38f5b898ed4d25 6809695c2d3ac3b92c06049c9b920e8c0e99ee1998a11a7f181f2b0ceb47c197
-test/extractor-tests/generated/MatchExpr/MatchExpr_getExpr.ql 7baaa64071cf2666e3b2bc05630d92a7a3b6cf04a026b1f7053c5e2a735bcaa8 d9ba8d8bbff05cfc0461ab41295f921b48429b4376c29adf54428bd5a9aa5298
 test/extractor-tests/generated/MatchExpr/MatchExpr_getMatchArmList.ql d97055bcb0431e8b258b5ecdd98aa07cb24ece06b0cd658b697cd71da4ede8fc 5e9c03b2665ef6b2af98897996abb2e0a9c18d54eb64588340b8efbcee9793bd
+test/extractor-tests/generated/MatchExpr/MatchExpr_getMatchedExpr.ql 478585d26c2b301f474f04569deb79728c80b3f67fe5c2536b64f5a29dcccf30 750d24c48dc0f57992265c3fc60fbfa400263f58f74b7951774a383d3ae4ae0a
 test/extractor-tests/generated/MatchGuard/MatchGuard.ql 23e47ec1b13e2d80e31b57894a46ec789d6ab5ed1eb66bdb6bba9bd5ae71d3ef 7302f4a93108a83228e0ebd5b4a1bc6bccc1f6f0f3272054866fa90378c0dcc4
 test/extractor-tests/generated/MatchGuard/MatchGuard_getCondition.ql 8a79dd46798f111f8d0d5a975380b5cebe5e337267752b77b3718b268ba2773d 6691d8fb483f64fc7e3ad3f46e3129e0a1184d7beb9f83a1000acdbb081c8b5e
 test/extractor-tests/generated/Meta/Meta.ql 16f163f00ba2bbaa0a8c6f3f6710c860a8f61d02d43321c78e05a10a3606e39b ba982c6bb93ddb4fc2c44d24635bd487128a5b1d1f885214044c989a21f4d05a

rust/ql/.gitattributes

@@ -849,8 +849,8 @@
 /test/extractor-tests/generated/MatchArmList/MatchArmList_getAttr.ql linguist-generated
 /test/extractor-tests/generated/MatchExpr/MatchExpr.ql linguist-generated
 /test/extractor-tests/generated/MatchExpr/MatchExpr_getAttr.ql linguist-generated
-/test/extractor-tests/generated/MatchExpr/MatchExpr_getExpr.ql linguist-generated
 /test/extractor-tests/generated/MatchExpr/MatchExpr_getMatchArmList.ql linguist-generated
+/test/extractor-tests/generated/MatchExpr/MatchExpr_getMatchedExpr.ql linguist-generated
 /test/extractor-tests/generated/MatchGuard/MatchGuard.ql linguist-generated
 /test/extractor-tests/generated/MatchGuard/MatchGuard_getCondition.ql linguist-generated
 /test/extractor-tests/generated/Meta/Meta.ql linguist-generated

rust/ql/lib/codeql/rust/controlflow/internal/ControlFlowGraphImpl.qll

@@ -514,14 +514,14 @@ module ExprTrees {
 
   class MatchExprTree extends PostOrderTree instanceof MatchExpr {
     override predicate propagatesAbnormal(AstNode child) {
-      child = [super.getExpr(), super.getAnArm().getExpr()]
+      child = [super.getMatchedExpr(), super.getAnArm().getExpr()]
     }
 
-    override predicate first(AstNode node) { first(super.getExpr(), node) }
+    override predicate first(AstNode node) { first(super.getMatchedExpr(), node) }
 
     override predicate succ(AstNode pred, AstNode succ, Completion c) {
       // Edge from the scrutinee to the first arm or to the match expression if no arms.
-      last(super.getExpr(), pred, c) and
+      last(super.getMatchedExpr(), pred, c) and
       (
         first(super.getArm(0).getPat(), succ)
         or

rust/ql/lib/codeql/rust/controlflow/internal/generated/CfgNodes.qll

@@ -1709,7 +1709,7 @@ module MakeCfgNodes<LocationSig Loc, InputSig<Loc> Input> {
       override predicate relevantChild(AstNode child) {
         none()
         or
-        child = this.getExpr()
+        child = this.getMatchedExpr()
       }
     }
 
@@ -1754,14 +1754,14 @@ module MakeCfgNodes<LocationSig Loc, InputSig<Loc> Input> {
       /**
        * Gets the expression of this match expression, if it exists.
        */
-      ExprCfgNode getExpr() {
+      ExprCfgNode getMatchedExpr() {
-        any(ChildMapping mapping).hasCfgChild(node, node.getExpr(), this, result)
+        any(ChildMapping mapping).hasCfgChild(node, node.getMatchedExpr(), this, result)
       }
 
       /**
-       * Holds if `getExpr()` exists.
+       * Holds if `getMatchedExpr()` exists.
        */
-      predicate hasExpr() { exists(this.getExpr()) }
+      predicate hasMatchedExpr() { exists(this.getMatchedExpr()) }
 
       /**
        * Gets the match arm list of this match expression, if it exists.
@@ -3451,14 +3451,14 @@ module MakeCfgNodes<LocationSig Loc, InputSig<Loc> Input> {
           cfgNode
         )
       or
-      pred = "getExpr" and
+      pred = "getMatchedExpr" and
       parent =
         any(Nodes::MatchExprCfgNode cfgNode, MatchExpr astNode |
           astNode = cfgNode.getMatchExpr() and
-          child = getDesugared(astNode.getExpr()) and
+          child = getDesugared(astNode.getMatchedExpr()) and
           i = -1 and
           hasCfgNode(child) and
-          not child = cfgNode.getExpr().getAstNode()
+          not child = cfgNode.getMatchedExpr().getAstNode()
         |
           cfgNode
         )

rust/ql/lib/codeql/rust/elements/internal/generated/MatchExpr.qll

@@ -57,15 +57,17 @@ module Generated {
     /**
      * Gets the expression of this match expression, if it exists.
      */
-    Expr getExpr() {
+    Expr getMatchedExpr() {
       result =
-        Synth::convertExprFromRaw(Synth::convertMatchExprToRaw(this).(Raw::MatchExpr).getExpr())
+        Synth::convertExprFromRaw(Synth::convertMatchExprToRaw(this)
+              .(Raw::MatchExpr)
+              .getMatchedExpr())
     }
 
     /**
-     * Holds if `getExpr()` exists.
+     * Holds if `getMatchedExpr()` exists.
      */
-    final predicate hasExpr() { exists(this.getExpr()) }
+    final predicate hasMatchedExpr() { exists(this.getMatchedExpr()) }
 
     /**
      * Gets the match arm list of this match expression, if it exists.

rust/ql/lib/codeql/rust/elements/internal/generated/ParentChild.qll

@@ -2030,13 +2030,13 @@ private module Impl {
   }
 
   private Element getImmediateChildOfMatchExpr(MatchExpr e, int index, string partialPredicateCall) {
-    exists(int b, int bExpr, int n, int nAttr, int nExpr, int nMatchArmList |
+    exists(int b, int bExpr, int n, int nAttr, int nMatchedExpr, int nMatchArmList |
       b = 0 and
       bExpr = b + 1 + max(int i | i = -1 or exists(getImmediateChildOfExpr(e, i, _)) | i) and
       n = bExpr and
       nAttr = n + 1 + max(int i | i = -1 or exists(e.getAttr(i)) | i) and
-      nExpr = nAttr + 1 and
+      nMatchedExpr = nAttr + 1 and
-      nMatchArmList = nExpr + 1 and
+      nMatchArmList = nMatchedExpr + 1 and
       (
         none()
         or
@@ -2045,9 +2045,11 @@ private module Impl {
         result = e.getAttr(index - n) and
         partialPredicateCall = "Attr(" + (index - n).toString() + ")"
         or
-        index = nAttr and result = e.getExpr() and partialPredicateCall = "Expr()"
+        index = nAttr and result = e.getMatchedExpr() and partialPredicateCall = "MatchedExpr()"
         or
-        index = nExpr and result = e.getMatchArmList() and partialPredicateCall = "MatchArmList()"
+        index = nMatchedExpr and
+        result = e.getMatchArmList() and
+        partialPredicateCall = "MatchArmList()"
       )
     )
   }

rust/ql/lib/codeql/rust/elements/internal/generated/Raw.qll

@@ -2172,7 +2172,7 @@ module Raw {
     /**
      * Gets the expression of this match expression, if it exists.
      */
-    Expr getExpr() { match_expr_exprs(this, result) }
+    Expr getMatchedExpr() { match_expr_exprs(this, result) }
 
     /**
      * Gets the match arm list of this match expression, if it exists.

rust/ql/test/extractor-tests/generated/MatchExpr/MatchExpr.expected

@@ -1,2 +1,2 @@
-| gen_match_expr.rs:5:5:8:5 | match x { ... } | getNumberOfAttrs: | 0 | hasExpr: | yes | hasMatchArmList: | yes |
+| gen_match_expr.rs:5:5:8:5 | match x { ... } | getNumberOfAttrs: | 0 | hasMatched: | yes | hasMatchArmList: | yes |
-| gen_match_expr.rs:9:5:12:5 | match x { ... } | getNumberOfAttrs: | 0 | hasExpr: | yes | hasMatchArmList: | yes |
+| gen_match_expr.rs:9:5:12:5 | match x { ... } | getNumberOfAttrs: | 0 | hasMatched: | yes | hasMatchArmList: | yes |

rust/ql/test/extractor-tests/generated/MatchExpr/MatchExpr.ql

@@ -2,12 +2,12 @@
 import codeql.rust.elements
 import TestUtils
 
-from MatchExpr x, int getNumberOfAttrs, string hasExpr, string hasMatchArmList
+from MatchExpr x, int getNumberOfAttrs, string hasMatchedExpr, string hasMatchArmList
 where
   toBeTested(x) and
   not x.isUnknown() and
   getNumberOfAttrs = x.getNumberOfAttrs() and
-  (if x.hasExpr() then hasExpr = "yes" else hasExpr = "no") and
+  (if x.hasMatchedExpr() then hasMatchedExpr = "yes" else hasMatchedExpr = "no") and
   if x.hasMatchArmList() then hasMatchArmList = "yes" else hasMatchArmList = "no"
-select x, "getNumberOfAttrs:", getNumberOfAttrs, "hasExpr:", hasExpr, "hasMatchArmList:",
+select x, "getNumberOfAttrs:", getNumberOfAttrs, "hasMatchedExpr:", hasMatchedExpr,
-  hasMatchArmList
+  "hasMatchArmList:", hasMatchArmList

rust/ql/test/extractor-tests/generated/MatchExpr/MatchExpr_getMatched.expected

@@ -0,0 +1,2 @@
+| gen_match_expr.rs:5:5:8:5 | match x { ... } | gen_match_expr.rs:5:11:5:11 | x |
+| gen_match_expr.rs:9:5:12:5 | match x { ... } | gen_match_expr.rs:9:11:9:11 | x |

rust/ql/test/extractor-tests/generated/MatchExpr/MatchExpr_getMatchedExpr.ql

@@ -4,4 +4,4 @@ import TestUtils
 
 from MatchExpr x
 where toBeTested(x) and not x.isUnknown()
-select x, x.getExpr()
+select x, x.getMatchedExpr()

rust/schema/annotations.py

@@ -289,6 +289,7 @@ class _:
     }
     ```
     """
+    expr: _ | ql.name("matched_expr")
 
 
 @annotate(ContinueExpr, cfg = True)