getContinueTarget() — react Function Reference

Source Code

compiler/packages/babel-plugin-react-compiler/src/ReactiveScopes/BuildReactiveFunction.ts lines 1433–1468

  getContinueTarget(
    block: BlockId,
  ): {block: BlockId; type: ReactiveTerminalTargetKind} | null {
    let hasPrecedingLoop = false;
    for (let i = this.#controlFlowStack.length - 1; i >= 0; i--) {
      const target = this.#controlFlowStack[i]!;
      if (target.type == 'loop' && target.continueBlock === block) {
        let type: ReactiveTerminalTargetKind;
        if (hasPrecedingLoop) {
          /*
           * continuing to a loop that is not the innermost loop always requires
           * a label
           */
          type = 'labeled';
        } else if (i === this.#controlFlowStack.length - 1) {
          /*
           * continuing to the last break point, which is where control will
           * transfer to naturally
           */
          type = 'implicit';
        } else {
          /*
           * the continue is inside some conditional logic, requires an explicit
           * continue
           */
          type = 'unlabeled';
        }
        return {
          block: target.block,
          type,
        };
      }
      hasPrecedingLoop ||= target.type === 'loop';
    }
    return null;
  }