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Add RustPython runtime AST fields#2

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youknowone merged 1 commit into
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runtime-field
Jun 25, 2026
Merged

Add RustPython runtime AST fields#2
youknowone merged 1 commit into
mainfrom
runtime-field

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@youknowone youknowone commented Jun 25, 2026 •
edited by coderabbitai Bot
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Summary

Test Plan

Summary by CodeRabbit

  • New Features

    • Added support for constant expressions across parsing, traversal, and comparison logic.
    • Expanded syntax handling for f-strings, t-strings, match patterns, and several statement forms with richer runtime-aware AST coverage.

  • Bug Fixes

    • Improved handling of boolean, None, and ellipsis-style constants in expression analysis and precedence detection.
    • Fixed source-order and transform traversal so constant expressions are processed consistently.
    • Updated relocation and parsing paths to preserve the new AST structure during edits and recovery.

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coderabbitai Bot commented Jun 25, 2026 •
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📝 Walkthrough

Walkthrough

The AST schema adds ConstantValue, ExprConstant, and runtime_* storage across statements, expressions, patterns, and modules. Parsers initialize the new fields, and visitors, helpers, precedence, relocation, and comparable-node code add handling for Expr::Constant.

Changes

Constant AST runtime support

Layer / File(s) Summary
AST field contracts
crates/ruff_python_ast/ast.toml, crates/ruff_python_ast/src/nodes.rs, crates/ruff_python_ast/generate.py, crates/ruff_python_ast/src/generated.rs		 ConstantValue and the new runtime_* fields are declared across AST schema and generated node structs, and the generator prefix list is extended for ConstantValue.
Constant expression wrappers
crates/ruff_python_ast/src/generated.rs		 ExprConstant is wired through the generated expression wrappers, refs, node kinds, accessors, and root-node conversion APIs.
Expression parser runtime data
crates/ruff_python_parser/src/parser/expression.rs, crates/ruff_python_parser/src/parser/helpers.rs, crates/ruff_python_parser/src/parser/recovery.rs		 Expression parser paths initialize runtime_* fields for args, containers, strings, comparisons, and comprehensions, and constant literals are recognized in parser helpers and recovery.
Statements, module, and pattern runtime data
crates/ruff_python_parser/src/parser/mod.rs, crates/ruff_python_parser/src/parser/statement.rs, crates/ruff_python_parser/src/parser/pattern.rs		 Module, statement, and pattern parsing paths initialize the corresponding runtime_* fields on bodies, decorators, targets, match patterns, parameters, and type parameters.
Constant-aware semantics
crates/ruff_python_ast/src/comparable.rs, crates/ruff_python_ast/src/helpers.rs, crates/ruff_python_ast/src/operator_precedence.rs, crates/ruff_python_ast/src/relocate.rs		 Comparable and helper logic treat Expr::Constant and ConstantValue as literal-like values for comparison, hashing, truthiness, singleton detection, operator precedence, and relocation.
Traversal and visitor updates
crates/ruff_python_ast/src/node.rs, crates/ruff_python_ast/src/visitor.rs, crates/ruff_python_ast/src/visitor/source_order.rs, crates/ruff_python_ast/src/visitor/transformer.rs, crates/ruff_python_ast/src/generated.rs		 Traversal code visits Expr::Constant and broadens struct patterns to ignore the added runtime_* fields in source-order, walker, and transformer paths.

Estimated code review effort

🎯 4 (Complex) | ⏱️ ~60 minutes

Poem

I hopped through Expr::Constant with a twitching nose,
And tucked runtime_* carrots where the AST grows.
I nibbled truthiness, then bounded through the trees,
While visitors and parsers rustled in the breeze.
🐇✨

✨ Finishing Touches
📝 Generate docstrings
  • Create stacked PR
  • Commit on current branch
🧪 Generate unit tests (beta)
  • Create PR with unit tests
  • Commit unit tests in branch runtime-field

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@youknowone youknowone merged commit 3c1ab2d into main Jun 25, 2026
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@youknowone youknowone deleted the runtime-field branch June 25, 2026 04:47
@youknowone youknowone mentioned this pull request Jun 25, 2026
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