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copilot/add-cpp-regular-expression-parser
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57 Commits

Author SHA1 Message Date
Taus
a0a0e9e9a7 yeast: Add test for chained rules with output-only kinds 
Adds a regression test verifying that desugaring rules can chain across
output-only node kinds: a first rule rewrites an input kind to an
output-only kind, and a second rule then rewrites that output-only
kind into another output-only kind. This exercises the schema lookup
for query patterns whose root kind is not present in the input
tree-sitter grammar.
 2026-05-06 11:45:53 +00:00
Taus
60dcf88b50 yeast: Add Bazel build rules for yeast crates 
Add BUILD.bazel files for the yeast and yeast-macros crates, register
them as dependencies of the shared tree-sitter extractor, and refresh
the vendored crate dependencies via update_tree_sitter_extractors_deps.sh.
 2026-05-06 11:34:09 +00:00
Taus
cc28ff9a48 yeast: Add yeast documentation 
Covers architecture, query language, template language
(tree!/trees!/rule!),
capture semantics, fresh identifiers, and extractor integration.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
 2026-05-06 11:34:09 +00:00
Taus
6e580446fd yeast: Add yeast test suite 
12 tests covering parsing, queries, tree building, desugaring rules,
cursor navigation, and the shorthand rule! syntax.

Tests use a custom output node-types.yml with named fields for all
children (parameter, stmt, index), loaded via
schema_from_yaml_with_language.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
 2026-05-06 11:34:09 +00:00
Taus
4c5548363c yeast: Add AST dumper for human-readable tree output 
Produces indented text showing node kinds, named fields, and leaf
content. Unnamed tokens are hidden unless inside a named field.
Used by tests for readable assertions.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
 2026-05-06 11:34:09 +00:00
Taus
8a9e53cc58 yeast: Add YAML node-types format and converter 
Human-friendly YAML alternative to tree-sitter node-types.json with
three sections: supertypes, named, unnamed. Supports bidirectional
conversion and building Schema objects from YAML.

Includes CLI binary (node_types_yaml) and documentation.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
 2026-05-06 11:34:09 +00:00
Taus
04f587190e yeast: AST desugaring framework with proc-macro DSL 
YEAST (YEAST Elaborates Abstract Syntax Trees) is a framework for
transforming tree-sitter parse trees before CodeQL extraction.

Core components:
- shared/yeast/ — Ast, Node, Schema, query matching engine, captures,
  FreshScope, BuildCtx
- shared/yeast-macros/ — proc macros: query!, tree!, trees!, rule!

The query language is inspired by tree-sitter queries:
  (assignment left: (_) @lhs right: (_) @rhs)

Templates support embedded Rust ({expr}), splicing ({..expr}),
computed literals (#{expr}), and fresh identifiers ($name).

The rule! macro combines query and transform:
  rule!((for pattern: (_) @pat ...) => (call receiver: {val} ...))

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
 2026-05-06 11:34:09 +00:00