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visitScope() — react Function Reference

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

Function typescript BabelCompiler Validation calls 3

Entity Profile

Dependency Diagram

graph TD
  5e066f27_b301_d78c_0fde_a2fbb735acd8["visitScope()"]
  0978ed10_d7af_9dac_ac08_cbaa51b0ff27["PromoteTemporaries"]
  5e066f27_b301_d78c_0fde_a2fbb735acd8 -->|defined in| 0978ed10_d7af_9dac_ac08_cbaa51b0ff27
  2eebfc2b_b1f6_9f25_ad32_78be0b56f06b["traverseScope()"]
  5e066f27_b301_d78c_0fde_a2fbb735acd8 -->|calls| 2eebfc2b_b1f6_9f25_ad32_78be0b56f06b
  81fadb8d_22f1_6208_bbd3_8af4016beda9["promoteIdentifier()"]
  5e066f27_b301_d78c_0fde_a2fbb735acd8 -->|calls| 81fadb8d_22f1_6208_bbd3_8af4016beda9
  4acb57df_5348_9aab_9691_41cf35127db4["visitScope()"]
  5e066f27_b301_d78c_0fde_a2fbb735acd8 -->|calls| 4acb57df_5348_9aab_9691_41cf35127db4
  style 5e066f27_b301_d78c_0fde_a2fbb735acd8 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

compiler/packages/babel-plugin-react-compiler/src/ReactiveScopes/PromoteUsedTemporaries.ts lines 34–54

  override visitScope(scopeBlock: ReactiveScopeBlock, state: State): void {
    for (const dep of scopeBlock.scope.dependencies) {
      const {identifier} = dep;
      if (identifier.name == null) {
        promoteIdentifier(identifier, state);
      }
    }
    /*
     * This is technically optional. We could prune ReactiveScopes
     * whose outputs are not used in another computation or return
     * value.
     * Many of our current test fixtures do not return a value, so
     * it is better for now to promote (and memoize) every output.
     */
    for (const [, declaration] of scopeBlock.scope.declarations) {
      if (declaration.identifier.name == null) {
        promoteIdentifier(declaration.identifier, state);
      }
    }
    this.traverseScope(scopeBlock, state);
  }

Domain

Subdomains

Defined In

Calls

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/PromoteUsedTemporaries.ts.
Where is visitScope() defined?
visitScope() is defined in compiler/packages/babel-plugin-react-compiler/src/ReactiveScopes/PromoteUsedTemporaries.ts at line 34.
What does visitScope() call?
visitScope() calls 3 function(s): promoteIdentifier, traverseScope, visitScope.

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