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51 lines
1.4 KiB
JavaScript
51 lines
1.4 KiB
JavaScript
"use strict";
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let 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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// 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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generate: function(grammar, options) {
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options = options !== undefined ? options : {};
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function convertPasses(passes) {
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let converted = {};
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Object.keys(passes).forEach(stage => {
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converted[stage] = Object.keys(passes[stage])
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.map(name => passes[stage][name]);
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});
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return converted;
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}
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let plugins = "plugins" in options ? options.plugins : [];
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let 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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plugins.forEach(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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