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transformInstruction() — react Function Reference

Architecture documentation for the transformInstruction() function in PruneAlwaysInvalidatingScopes.ts from the react codebase.

Function typescript BabelCompiler Validation

Entity Profile

Dependency Diagram

graph TD
  ab01b4ae_5d3f_c6b4_3512_fc828a66df7c["transformInstruction()"]
  d9cfc6c8_2b94_462b_69b8_bedddf5c2c61["Transform"]
  ab01b4ae_5d3f_c6b4_3512_fc828a66df7c -->|defined in| d9cfc6c8_2b94_462b_69b8_bedddf5c2c61
  style ab01b4ae_5d3f_c6b4_3512_fc828a66df7c fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

compiler/packages/babel-plugin-react-compiler/src/ReactiveScopes/PruneAlwaysInvalidatingScopes.ts lines 35–82

  override transformInstruction(
    instruction: ReactiveInstruction,
    withinScope: boolean,
  ): Transformed<ReactiveStatement> {
    this.visitInstruction(instruction, withinScope);

    const {lvalue, value} = instruction;
    switch (value.kind) {
      case 'ArrayExpression':
      case 'ObjectExpression':
      case 'JsxExpression':
      case 'JsxFragment':
      case 'NewExpression': {
        if (lvalue !== null) {
          this.alwaysInvalidatingValues.add(lvalue.identifier);
          if (!withinScope) {
            this.unmemoizedValues.add(lvalue.identifier);
          }
        }
        break;
      }
      case 'StoreLocal': {
        if (this.alwaysInvalidatingValues.has(value.value.identifier)) {
          this.alwaysInvalidatingValues.add(value.lvalue.place.identifier);
        }
        if (this.unmemoizedValues.has(value.value.identifier)) {
          this.unmemoizedValues.add(value.lvalue.place.identifier);
        }
        break;
      }
      case 'LoadLocal': {
        if (
          lvalue !== null &&
          this.alwaysInvalidatingValues.has(value.place.identifier)
        ) {
          this.alwaysInvalidatingValues.add(lvalue.identifier);
        }
        if (
          lvalue !== null &&
          this.unmemoizedValues.has(value.place.identifier)
        ) {
          this.unmemoizedValues.add(lvalue.identifier);
        }
        break;
      }
    }
    return {kind: 'keep'};
  }

Domain

Subdomains

Defined In

Source

Frequently Asked Questions

What does transformInstruction() do?
transformInstruction() is a function in the react codebase, defined in compiler/packages/babel-plugin-react-compiler/src/ReactiveScopes/PruneAlwaysInvalidatingScopes.ts.
Where is transformInstruction() defined?
transformInstruction() is defined in compiler/packages/babel-plugin-react-compiler/src/ReactiveScopes/PruneAlwaysInvalidatingScopes.ts at line 35.

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