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52 lines
1.4 KiB
JavaScript
52 lines
1.4 KiB
JavaScript
"use strict";
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const mapObj = require("map-obj");
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let GrammarError = require("./grammar-error");
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let compiler = require("./compiler");
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let parser = require("./parser");
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module.exports = {
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// PEG.js version (uses semantic versioning).
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VERSION: require("../package.json").version,
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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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// FIXME: Validatem
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let config = {
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parser: parser,
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passes: mapObj(compiler.passes, (stage, passesForStage) => {
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return [ stage, Object.values(passesForStage) ];
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})
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};
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let parseResult = config.parser.parse(grammar);
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if (parseResult.imports.length === 0) {
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return compiler.compile(
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parseResult,
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config.passes,
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options
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);
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} else {
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throw new Error("`import` syntax can only be used with `generateFromFile`");
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}
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},
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generateFromFile: function (path, options = {}) {
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throw new Error(`Unimplemented`);
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}
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};
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