59 lines
1.5 KiB
JavaScript
59 lines
1.5 KiB
JavaScript
"use strict";
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var arrays = require("./utils/arrays"),
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objects = require("./utils/objects");
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var peg = {
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/* PEG.js version (uses semantic versioning). */
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VERSION: "0.10.0",
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GrammarError: require("./grammar-error"),
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parser: require("./parser"),
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compiler: require("./compiler"),
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/*
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* Generates a parser from a specified grammar and returns it.
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*
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* The grammar must be a string in the format described by the metagramar in
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* the parser.pegjs file.
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*
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* Throws |peg.parser.SyntaxError| if the grammar contains a syntax error or
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* |peg.GrammarError| if it contains a semantic error. Note that not all
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* errors are detected during the generation and some may protrude to the
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* generated parser and cause its malfunction.
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*/
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generate: function(grammar, options) {
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options = options !== void 0 ? options : {};
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function convertPasses(passes) {
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var converted = {}, stage;
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for (stage in passes) {
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if (passes.hasOwnProperty(stage)) {
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converted[stage] = objects.values(passes[stage]);
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}
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}
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return converted;
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}
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options = objects.clone(options);
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var plugins = "plugins" in options ? options.plugins : [],
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config = {
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parser: peg.parser,
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passes: convertPasses(peg.compiler.passes)
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};
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arrays.each(plugins, function(p) { p.use(config, options); });
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return peg.compiler.compile(
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config.parser.parse(grammar),
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config.passes,
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options
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);
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}
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};
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module.exports = peg;
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