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areLValuesLastUsedByScope() — react Function Reference

Architecture documentation for the areLValuesLastUsedByScope() function in MergeReactiveScopesThatInvalidateTogether.ts from the react codebase.

Function typescript BabelCompiler Validation calls 1 called by 1

Entity Profile

Dependency Diagram

graph TD
  34751151_352b_2ab2_756a_e87e6700e5d1["areLValuesLastUsedByScope()"]
  006711fe_6949_9be8_4726_2031284f3328["MergeReactiveScopesThatInvalidateTogether.ts"]
  34751151_352b_2ab2_756a_e87e6700e5d1 -->|defined in| 006711fe_6949_9be8_4726_2031284f3328
  11690004_c468_3b6b_f07f_36a6501f870a["visitBlock()"]
  11690004_c468_3b6b_f07f_36a6501f870a -->|calls| 34751151_352b_2ab2_756a_e87e6700e5d1
  2ac731a7_1748_e943_7a74_4b9c344e4398["log()"]
  34751151_352b_2ab2_756a_e87e6700e5d1 -->|calls| 2ac731a7_1748_e943_7a74_4b9c344e4398
  style 34751151_352b_2ab2_756a_e87e6700e5d1 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

compiler/packages/babel-plugin-react-compiler/src/ReactiveScopes/MergeReactiveScopesThatInvalidateTogether.ts lines 422–435

function areLValuesLastUsedByScope(
  scope: ReactiveScope,
  lvalues: Set<DeclarationId>,
  lastUsage: Map<DeclarationId, InstructionId>,
): boolean {
  for (const lvalue of lvalues) {
    const lastUsedAt = lastUsage.get(lvalue)!;
    if (lastUsedAt >= scope.range.end) {
      log(`  lvalue ${lvalue} used after scope @${scope.id}, cannot merge`);
      return false;
    }
  }
  return true;
}

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Defined In

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Frequently Asked Questions

What does areLValuesLastUsedByScope() do?
areLValuesLastUsedByScope() is a function in the react codebase, defined in compiler/packages/babel-plugin-react-compiler/src/ReactiveScopes/MergeReactiveScopesThatInvalidateTogether.ts.
Where is areLValuesLastUsedByScope() defined?
areLValuesLastUsedByScope() is defined in compiler/packages/babel-plugin-react-compiler/src/ReactiveScopes/MergeReactiveScopesThatInvalidateTogether.ts at line 422.
What does areLValuesLastUsedByScope() call?
areLValuesLastUsedByScope() calls 1 function(s): log.
What calls areLValuesLastUsedByScope()?
areLValuesLastUsedByScope() is called by 1 function(s): visitBlock.

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