46 lines
840 B
JavaScript
46 lines
840 B
JavaScript
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'use strict';
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var acorn = require('acorn');
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var objectAssign = require('object-assign');
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module.exports = isExpression;
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var DEFAULT_OPTIONS = {
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throw: false,
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strict: false,
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lineComment: false
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};
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function isExpression(src, options) {
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options = objectAssign({}, DEFAULT_OPTIONS, options);
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try {
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var parser = new acorn.Parser(options, src, 0);
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if (options.strict) {
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parser.strict = true;
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}
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if (!options.lineComment) {
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parser.skipLineComment = function (startSkip) {
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this.raise(this.pos, 'Line comments not allowed in an expression');
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};
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}
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parser.nextToken();
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parser.parseExpression();
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if (parser.type !== acorn.tokTypes.eof) {
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parser.unexpected();
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}
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} catch (ex) {
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if (!options.throw) {
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return false;
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}
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throw ex;
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}
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return true;
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}
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