24 lines
622 B
JavaScript
24 lines
622 B
JavaScript
(function (tree) {
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tree.Expression = function (value) { this.value = value };
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tree.Expression.prototype = {
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eval: function (env) {
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if (this.value.length > 1) {
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return new(tree.Expression)(this.value.map(function (e) {
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return e.eval(env);
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}));
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} else if (this.value.length === 1) {
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return this.value[0].eval(env);
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} else {
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return this;
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}
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},
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toCSS: function (env) {
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return this.value.map(function (e) {
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return e.toCSS ? e.toCSS(env) : '';
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}).join(' ');
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}
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};
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})(require('../tree'));
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