collectHoistablePropertyLoads() — react Function Reference

Source Code

compiler/packages/babel-plugin-react-compiler/src/HIR/CollectHoistablePropertyLoads.ts lines 98–130

export function collectHoistablePropertyLoads(
  fn: HIRFunction,
  temporaries: ReadonlyMap<IdentifierId, ReactiveScopeDependency>,
  hoistableFromOptionals: ReadonlyMap<BlockId, ReactiveScopeDependency>,
): ReadonlyMap<BlockId, BlockInfo> {
  const registry = new PropertyPathRegistry();
  /**
   * Due to current limitations of mutable range inference, there are edge cases in
   * which we infer known-immutable values (e.g. props or hook params) to have a
   * mutable range and scope.
   * (see `destructure-array-declaration-to-context-var` fixture)
   * We track known immutable identifiers to reduce regressions (as PropagateScopeDeps
   * is being rewritten to HIR).
   */
  const knownImmutableIdentifiers = new Set<IdentifierId>();
  if (fn.fnType === 'Component' || fn.fnType === 'Hook') {
    for (const p of fn.params) {
      if (p.kind === 'Identifier') {
        knownImmutableIdentifiers.add(p.identifier.id);
      }
    }
  }
  return collectHoistablePropertyLoadsImpl(fn, {
    temporaries,
    knownImmutableIdentifiers,
    hoistableFromOptionals,
    registry,
    nestedFnImmutableContext: null,
    assumedInvokedFns: fn.env.config.enableTreatFunctionDepsAsConditional
      ? new Set()
      : getAssumedInvokedFunctions(fn),
  });
}