You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

58 lines
1.5 KiB
JavaScript

"use strict";
var objects = require("./utils/objects");
var 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: function(grammar, options) {
options = options !== undefined ? options : {};
function convertPasses(passes) {
var converted = {}, stage;
for (stage in passes) {
if (passes.hasOwnProperty(stage)) {
converted[stage] = objects.values(passes[stage]);
}
}
return converted;
}
options = objects.clone(options);
var plugins = "plugins" in options ? options.plugins : [],
config = {
parser: peg.parser,
passes: convertPasses(peg.compiler.passes)
};
plugins.forEach(function(p) { p.use(config, options); });
return peg.compiler.compile(
config.parser.parse(grammar),
config.passes,
options
);
}
};
module.exports = peg;