Function addMetadata

packages/compiler-cli/src/ngtsc/metadata/src/inheritance.ts:46–83

(meta: DirectiveMeta)

  let isStructural: boolean = false;

  const addMetadata = (meta: DirectiveMeta): void => {
    if (meta.baseClass === 'dynamic') {
      isDynamic = true;
    } else if (meta.baseClass !== null) {
      const baseMeta = reader.getDirectiveMetadata(meta.baseClass);
      if (baseMeta !== null) {
        addMetadata(baseMeta);
      } else {
        // Missing metadata for the base class means it's effectively dynamic.
        isDynamic = true;
      }
    }

    isStructural = isStructural || meta.isStructural;

    inputs = ClassPropertyMapping.merge(inputs, meta.inputs);
    outputs = ClassPropertyMapping.merge(outputs, meta.outputs);

    for (const coercedInputField of meta.coercedInputFields) {
      coercedInputFields.add(coercedInputField);
    }
    for (const undeclaredInputField of meta.undeclaredInputFields) {
      undeclaredInputFields.add(undeclaredInputField);
    }
    for (const restrictedInputField of meta.restrictedInputFields) {
      restrictedInputFields.add(restrictedInputField);
    }
    for (const field of meta.stringLiteralInputFields) {
      stringLiteralInputFields.add(field);
    }
    for (const name of meta.publicMethods) {
      publicMethods.add(name);
    }
    if (meta.hostDirectives !== null && meta.hostDirectives.length > 0) {
      hostDirectives ??= [];
      hostDirectives.push(...meta.hostDirectives);
    }
  };

  addMetadata(topMeta);