lookupBreak() — react Function Reference

Architecture documentation for the lookupBreak() function in HIRBuilder.ts from the react codebase.

Function typescript MIRInfrastructure HIR calls 1 called by 1

Entity Profile

MIRInfrastructure→ HIR→ lookupBreak() — react Function Reference

Dependency Diagram

graph TD
  89c5317a_d69c_9776_6a66_7d55d41c5dc0["lookupBreak()"]
  d1b85268_f4cd_bc3c_7ba0_ee15dcc8a845["HIRBuilder"]
  89c5317a_d69c_9776_6a66_7d55d41c5dc0 -->|defined in| d1b85268_f4cd_bc3c_7ba0_ee15dcc8a845
  c01b12bd_811d_9f90_f641_fac8e518dbb7["lowerStatement()"]
  c01b12bd_811d_9f90_f641_fac8e518dbb7 -->|calls| 89c5317a_d69c_9776_6a66_7d55d41c5dc0
  041ca752_10c1_3cda_1f5c_02f44a01310e["invariant()"]
  89c5317a_d69c_9776_6a66_7d55d41c5dc0 -->|calls| 041ca752_10c1_3cda_1f5c_02f44a01310e
  style 89c5317a_d69c_9776_6a66_7d55d41c5dc0 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

compiler/packages/babel-plugin-react-compiler/src/HIR/HIRBuilder.ts lines 574–589

  lookupBreak(label: string | null): BlockId {
    for (let ii = this.#scopes.length - 1; ii >= 0; ii--) {
      const scope = this.#scopes[ii];
      if (
        (label === null &&
          (scope.kind === 'loop' || scope.kind === 'switch')) ||
        label === scope.label
      ) {
        return scope.breakBlock;
      }
    }
    CompilerError.invariant(false, {
      reason: 'Expected a loop or switch to be in scope',
      loc: GeneratedSource,
    });
  }