var Node = require(“./node”),
Paren = require("./paren"), Comment = require("./comment");
var Expression = function (value) {
this.value = value; if (!value) { throw new Error("Expression requires an array parameter"); }
}; Expression.prototype = new Node(); Expression.prototype.type = “Expression”; Expression.prototype.accept = function (visitor) {
this.value = visitor.visitArray(this.value);
}; Expression.prototype.eval = function (context) {
var returnValue, inParenthesis = this.parens && !this.parensInOp, doubleParen = false; if (inParenthesis) { context.inParenthesis(); } if (this.value.length > 1) { returnValue = new Expression(this.value.map(function (e) { return e.eval(context); })); } else if (this.value.length === 1) { if (this.value[0].parens && !this.value[0].parensInOp) { doubleParen = true; } returnValue = this.value[0].eval(context); } else { returnValue = this; } if (inParenthesis) { context.outOfParenthesis(); } if (this.parens && this.parensInOp && !(context.isMathOn()) && !doubleParen) { returnValue = new Paren(returnValue); } return returnValue;
}; Expression.prototype.genCSS = function (context, output) {
for (var i = 0; i < this.value.length; i++) { this.value[i].genCSS(context, output); if (i + 1 < this.value.length) { output.add(" "); } }
}; Expression.prototype.throwAwayComments = function () {
this.value = this.value.filter(function(v) { return !(v instanceof Comment); });
}; module.exports = Expression;