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65 lines
1.6 KiB
JavaScript
65 lines
1.6 KiB
JavaScript
"use strict";
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const GrammarError = require( "./grammar-error" );
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const compiler = require( "./compiler" );
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const parser = require( "./parser" );
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const peg = {
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// PEG.js version (uses semantic versioning).
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VERSION: "0.11.0-dev",
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GrammarError: GrammarError,
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parser: parser,
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compiler: 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( grammar, options ) {
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options = typeof options !== "undefined" ? options : {};
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function convertPasses( passes ) {
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const 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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const plugins = "plugins" in options ? options.plugins : [];
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const 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 => {
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p.use( config, options );
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} );
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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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