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[ty] Add comment explaining why HasTrackedScope is implemented for Identifier and why it works (#21057)

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This commit is contained in:
Micha Reiser
2025-10-24 09:48:57 +02:00
committed by GitHub
parent be5a62f7e5
commit 4522f35ea7
1 changed files with 4 additions and 2 deletions
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6
crates/ty_python_semantic/src/semantic_model.rs
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@@ -505,8 +505,10 @@ impl HasTrackedScope for ast::Expr {}
impl HasTrackedScope for ast::ExprRef<'_> {}
impl HasTrackedScope for &ast::ExprRef<'_> {}
// See https://github.com/astral-sh/ty/issues/572 why this implementation exists
// even when we never register identifiers during semantic index building.
// We never explicitly register the scope of an `Identifier`.
// However, `ExpressionsScopeMap` stores the text ranges of each scope.
// That allows us to look up the identifier's scope for as long as it's
// inside an expression (because the ranges overlap).
impl HasTrackedScope for ast::Identifier {}
#[cfg(test)]