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1.3 KiB
JavaScript

"use strict";
let peg = {
// PEG.js version (uses semantic versioning).
VERSION: "0.10.0",
GrammarError: require("./grammar-error"),
parser: require("./parser"),
compiler: require("./compiler"),
// Generates a parser from a specified grammar and returns it.
//
// The grammar must be a string in the format described by the metagramar in
// the parser.pegjs file.
//
// Throws |peg.parser.SyntaxError| if the grammar contains a syntax error or
// |peg.GrammarError| if it contains a semantic error. Note that not all
// errors are detected during the generation and some may protrude to the
// generated parser and cause its malfunction.
generate(grammar, options) {
options = options !== undefined ? options : {};
function convertPasses(passes) {
let converted = {};
Object.keys(passes).forEach(stage => {
converted[stage] = Object.keys(passes[stage])
.map(name => passes[stage][name]);
});
return converted;
}
let plugins = "plugins" in options ? options.plugins : [];
let config = {
parser: peg.parser,
passes: convertPasses(peg.compiler.passes)
};
plugins.forEach(p => { p.use(config, options); });
return peg.compiler.compile(
config.parser.parse(grammar),
config.passes,
options
);
}
};
module.exports = peg;