numenor/lib/Parser/Parselet/Sequence.js

Customizable, safe evaluator of JavaScript-like expressions.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.Sequence = void 0;

var ExpressionType = _interopRequireWildcard(require("../ExpressionType"));

var _ = require("./");

var _Lexer = require("../../Lexer");

var _Error = require("../Error");

var _Precedence = require("../Precedence");

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }

var parselet = function parselet(parser, lhs, token) {
  if (token.type !== _Lexer.TokenType.Comma) {
    throw new SyntaxError((0, _Error.UnknownToken)(token));
  }

  var expressions = [lhs];
  var comma = token;

  do {
    if (parser.match(_Lexer.TokenType.EOF) || parser.match(_Lexer.TokenType.RParen)) {
      // do not allow trailing comma
      throw new SyntaxError((0, _Error.UnknownToken)(comma));
    }

    expressions.push(parser.parse(_Precedence.Sequence));
    comma = parser.token;
  } while (parser.accept(_Lexer.TokenType.Comma));

  return {
    type: ExpressionType.Sequence,
    expressions: expressions
  };
};

var Sequence = (0, _.makeInfix)(parselet, _Precedence.Sequence);
exports.Sequence = Sequence;