parse(context, start) {
      this.context = context;
      const {
        src
      } = context;

      let offset = _Node.default.endOfIdentifier(src, start + 1);

      this.valueRange = new _Range.default(start + 1, offset);
      offset = _Node.default.endOfWhiteSpace(src, offset);
      offset = this.parseComment(offset);
      return offset;
    }
Parses an *alias from the source

@param {ParseContext} context
@param {number} start - Index of first character
@returns {number} - Index of the character after this scalar