inferReactiveIdentifiers() — react Function Reference

Source Code

compiler/packages/babel-plugin-react-compiler/src/Inference/InferEffectDependencies.ts lines 492–515

function inferReactiveIdentifiers(fn: HIRFunction): Set<IdentifierId> {
  const reactiveIds: Set<IdentifierId> = new Set();
  for (const [, block] of fn.body.blocks) {
    for (const instr of block.instructions) {
      /**
       * No need to traverse into nested functions as
       * 1. their effects are recorded in `LoweredFunction.dependencies`
       * 2. we don't mark `reactive` in these anyways
       */
      for (const place of eachInstructionOperand(instr)) {
        if (place.reactive) {
          reactiveIds.add(place.identifier.id);
        }
      }
    }

    for (const place of eachTerminalOperand(block.terminal)) {
      if (place.reactive) {
        reactiveIds.add(place.identifier.id);
      }
    }
  }
  return reactiveIds;
}