memoizeFbtAndMacroOperandsInSameScope() — react Function Reference

Source Code

compiler/packages/babel-plugin-react-compiler/src/ReactiveScopes/MemoizeFbtAndMacroOperandsInSameScope.ts lines 73–95

export function memoizeFbtAndMacroOperandsInSameScope(
  fn: HIRFunction,
): Set<IdentifierId> {
  const macroKinds = new Map<Macro, MacroDefinition>([
    ...Array.from(FBT_TAGS.entries()),
    ...(fn.env.config.customMacros ?? []).map(
      name => [name, TRANSITIVE_MACRO] as [Macro, MacroDefinition],
    ),
  ]);
  /**
   * Forward data-flow analysis to identify all macro tags, including
   * things like `fbt.foo.bar(...)`
   */
  const macroTags = populateMacroTags(fn, macroKinds);

  /**
   * Reverse data-flow analysis to merge arguments to macro *invocations*
   * based on the kind of the macro
   */
  const macroValues = mergeMacroArguments(fn, macroTags, macroKinds);

  return macroValues;
}