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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>
CodeQL Shared Libraries
This folder contains shared, language-agnostic CodeQL libraries.
Libraries are organized into separate query packs, in order to allow for
individual versioning. For example, the shared static single assignment (SSA)
library exists in the codeql/ssa pack, which can be referenced by adding
dependencies:
codeql/ssa: 0.0.1
to qlpack.yml.
All shared libraries will belong to a codeql/<name> pack, and live in the
namespace codeql.<name>.