Java Code Examples for com.google.javascript.rhino.Token#EQUALS

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Example 1
Source File: TypeAnnotationPass.java    From clutz with MIT License 5 votes vote down vote up 
/**
 * Attempts to set the type of parameter represented by node by extracting it from @param
 * annotations in the function's jsDoc. Returns true if it succeeds (i.e. if it finds the type).
 */
private boolean setParameterTypeFromFunctionDoc(Node node, Node parent) {
  JSDocInfo parentDocInfo = NodeUtil.getBestJSDocInfo(parent.getParent());
  if (parentDocInfo == null) {
    return false;
  }
  String parameterName =
      node.isObjectPattern()
          ? parentDocInfo.getParameterNameAt(parent.getIndexOfChild(node))
          : node.getString();
  JSTypeExpression parameterType = parentDocInfo.getParameterType(parameterName);
  if (parameterType == null) {
    return false;
  }
  TypeDeclarationNode parameterTypeNode = convertTypeNodeAST(parameterType.getRoot());
  // Parameter is declared using verbose @param syntax before the function definition.
  Node attachTypeExpr = node;
  // Modify the primary AST to represent a function parameter as a
  // REST node, if the type indicates it is a rest parameter.
  if (parameterType.getRoot().getToken() == Token.ITER_REST) {
    attachTypeExpr = IR.iterRest(IR.name(node.getString()));
    nodeComments.replaceWithComment(node, attachTypeExpr);
  }
  // Modify the AST to represent an optional parameter
  if (parameterType.getRoot().getToken() == Token.EQUALS) {
    attachTypeExpr = IR.name(node.getString());
    if (!node.getParent().isDefaultValue()) {
      attachTypeExpr.putBooleanProp(Node.OPT_ES6_TYPED, true);
    } else if (node.getParent().getSecondChild().isName()
        && node.getParent().getSecondChild().getString().equals("undefined")) {
      // if default value is "undefined" add undefined to the type
      parameterTypeNode = flatUnionType(ImmutableList.of(parameterTypeNode, undefinedType()));
    }
    nodeComments.replaceWithComment(node, attachTypeExpr);
  }
  setTypeExpression(attachTypeExpr, parameterTypeNode);
  return true;
}