59 lines
1.5 KiB
JavaScript
59 lines
1.5 KiB
JavaScript
|
"use strict";
|
||
|
|
|
||
|
|
var arrays = require("./utils/arrays"),
|
||
|
|
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 !== void 0 ? 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)
|
||
|
|
};
|
||
|
|
|
||
|
|
arrays.each(plugins, function(p) { p.use(config, options); });
|
||
|
|
|
||
|
|
return peg.compiler.compile(
|
||
|
|
config.parser.parse(grammar),
|
||
|
|
config.passes,
|
||
|
|
options
|
||
|
|
);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
module.exports = peg;
|