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visitScope() — react Function Reference

Architecture documentation for the visitScope() function in PruneNonEscapingScopes.ts from the react codebase.

Function typescript BabelCompiler Validation calls 3 called by 1

Entity Profile

Dependency Diagram

graph TD
  8964b840_74b5_2c96_c227_89dd281fdf38["visitScope()"]
  714af45f_cbe2_027b_49c5_27e47069c22c["CollectDependenciesVisitor"]
  8964b840_74b5_2c96_c227_89dd281fdf38 -->|defined in| 714af45f_cbe2_027b_49c5_27e47069c22c
  f6b0f572_362c_d22e_89ed_27e1eef4d74e["transformScope()"]
  f6b0f572_362c_d22e_89ed_27e1eef4d74e -->|calls| 8964b840_74b5_2c96_c227_89dd281fdf38
  2eebfc2b_b1f6_9f25_ad32_78be0b56f06b["traverseScope()"]
  8964b840_74b5_2c96_c227_89dd281fdf38 -->|calls| 2eebfc2b_b1f6_9f25_ad32_78be0b56f06b
  4acb57df_5348_9aab_9691_41cf35127db4["visitScope()"]
  8964b840_74b5_2c96_c227_89dd281fdf38 -->|calls| 4acb57df_5348_9aab_9691_41cf35127db4
  041ca752_10c1_3cda_1f5c_02f44a01310e["invariant()"]
  8964b840_74b5_2c96_c227_89dd281fdf38 -->|calls| 041ca752_10c1_3cda_1f5c_02f44a01310e
  style 8964b840_74b5_2c96_c227_89dd281fdf38 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

compiler/packages/babel-plugin-react-compiler/src/ReactiveScopes/PruneNonEscapingScopes.ts lines 983–1007

  override visitScope(
    scope: ReactiveScopeBlock,
    scopes: Array<ReactiveScope>,
  ): void {
    /*
     * If a scope reassigns any variables, set the chain of active scopes as a dependency
     * of those variables. This ensures that if the variable escapes that we treat the
     * reassignment scopes — and importantly their dependencies — as needing memoization.
     */
    for (const reassignment of scope.scope.reassignments) {
      const identifierNode = this.state.identifiers.get(
        reassignment.declarationId,
      );
      CompilerError.invariant(identifierNode !== undefined, {
        reason: 'Expected identifier to be initialized',
        loc: reassignment.loc,
      });
      for (const scope of scopes) {
        identifierNode.scopes.add(scope.id);
      }
      identifierNode.scopes.add(scope.scope.id);
    }

    this.traverseScope(scope, [...scopes, scope.scope]);
  }

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Defined In

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Called By

Source

Frequently Asked Questions

What does visitScope() do?
visitScope() is a function in the react codebase, defined in compiler/packages/babel-plugin-react-compiler/src/ReactiveScopes/PruneNonEscapingScopes.ts.
Where is visitScope() defined?
visitScope() is defined in compiler/packages/babel-plugin-react-compiler/src/ReactiveScopes/PruneNonEscapingScopes.ts at line 983.
What does visitScope() call?
visitScope() calls 3 function(s): invariant, traverseScope, visitScope.
What calls visitScope()?
visitScope() is called by 1 function(s): transformScope.

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