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4528 lines (4224 loc) · 132 KB
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/*
* PEG.js 0.7.0
*
* http://pegjs.majda.cz/
*
* Copyright (c) 2010-2012 David Majda
* Licensend under the MIT license.
*/
var PEG = (function(undefined) {
var PEG = {
/* PEG.js version (uses semantic versioning). */
VERSION: "0.7.0",
/*
* 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.
*/
buildParser: function(grammar, options) {
return PEG.compiler.compile(PEG.parser.parse(grammar), options);
}
};
/* Thrown when the grammar contains an error. */
PEG.GrammarError = function(message) {
this.name = "PEG.GrammarError";
this.message = message;
};
PEG.GrammarError.prototype = Error.prototype;
/* Like Python's |range|, but without |step|. */
function range(start, stop) {
if (stop === undefined) {
stop = start;
start = 0;
}
var result = new Array(Math.max(0, stop - start));
for (var i = 0, j = start; j < stop; i++, j++) {
result[i] = j;
}
return result;
}
function find(array, callback) {
var length = array.length;
for (var i = 0; i < length; i++) {
if (callback(array[i])) {
return array[i];
}
}
}
function contains(array, value) {
/*
* Stupid IE does not have Array.prototype.indexOf, otherwise this function
* would be a one-liner.
*/
var length = array.length;
for (var i = 0; i < length; i++) {
if (array[i] === value) {
return true;
}
}
return false;
}
function each(array, callback) {
var length = array.length;
for (var i = 0; i < length; i++) {
callback(array[i], i);
}
}
function map(array, callback) {
var result = [];
var length = array.length;
for (var i = 0; i < length; i++) {
result[i] = callback(array[i], i);
}
return result;
}
function pluck(array, key) {
return map(array, function (e) { return e[key]; });
}
function keys(object) {
var result = [];
for (var key in object) {
result.push(key);
}
return result;
}
function values(object) {
var result = [];
for (var key in object) {
result.push(object[key]);
}
return result;
}
/*
* Returns a string padded on the left to a desired length with a character.
*
* The code needs to be in sync with the code template in the compilation
* function for "action" nodes.
*/
function padLeft(input, padding, length) {
var result = input;
var padLength = length - input.length;
for (var i = 0; i < padLength; i++) {
result = padding + result;
}
return result;
}
/*
* Returns an escape sequence for given character. Uses \x for characters <=
* 0xFF to save space, \u for the rest.
*
* The code needs to be in sync with the code template in the compilation
* function for "action" nodes.
*/
function escape(ch) {
var charCode = ch.charCodeAt(0);
var escapeChar;
var length;
if (charCode <= 0xFF) {
escapeChar = 'x';
length = 2;
} else {
escapeChar = 'u';
length = 4;
}
return '\\' + escapeChar + padLeft(charCode.toString(16).toUpperCase(), '0', length);
}
/*
* Surrounds the string with quotes and escapes characters inside so that the
* result is a valid JavaScript string.
*
* The code needs to be in sync with the code template in the compilation
* function for "action" nodes.
*/
function quote(s) {
/*
* ECMA-262, 5th ed., 7.8.4: All characters may appear literally in a string
* literal except for the closing quote character, backslash, carriage return,
* line separator, paragraph separator, and line feed. Any character may
* appear in the form of an escape sequence.
*
* For portability, we also escape escape all control and non-ASCII
* characters. Note that "\0" and "\v" escape sequences are not used because
* JSHint does not like the first and IE the second.
*/
return '"' + s
.replace(/\\/g, '\\\\') // backslash
.replace(/"/g, '\\"') // closing quote character
.replace(/\x08/g, '\\b') // backspace
.replace(/\t/g, '\\t') // horizontal tab
.replace(/\n/g, '\\n') // line feed
.replace(/\f/g, '\\f') // form feed
.replace(/\r/g, '\\r') // carriage return
.replace(/[\x00-\x07\x0B\x0E-\x1F\x80-\uFFFF]/g, escape)
+ '"';
}
/*
* Escapes characters inside the string so that it can be used as a list of
* characters in a character class of a regular expression.
*/
function quoteForRegexpClass(s) {
/*
* Based on ECMA-262, 5th ed., 7.8.5 & 15.10.1.
*
* For portability, we also escape escape all control and non-ASCII
* characters.
*/
return s
.replace(/\\/g, '\\\\') // backslash
.replace(/\//g, '\\/') // closing slash
.replace(/\]/g, '\\]') // closing bracket
.replace(/-/g, '\\-') // dash
.replace(/\0/g, '\\0') // null
.replace(/\t/g, '\\t') // horizontal tab
.replace(/\n/g, '\\n') // line feed
.replace(/\v/g, '\\x0B') // vertical tab
.replace(/\f/g, '\\f') // form feed
.replace(/\r/g, '\\r') // carriage return
.replace(/[\x01-\x08\x0E-\x1F\x80-\uFFFF]/g, escape);
}
/*
* Builds a node visitor -- a function which takes a node and any number of
* other parameters, calls an appropriate function according to the node type,
* passes it all its parameters and returns its value. The functions for various
* node types are passed in a parameter to |buildNodeVisitor| as a hash.
*/
function buildNodeVisitor(functions) {
return function(node) {
return functions[node.type].apply(null, arguments);
};
}
function findRuleByName(ast, name) {
return find(ast.rules, function(r) { return r.name === name; });
}
PEG.parser = (function(){
/*
* Generated by PEG.js 0.7.0.
*
* http://pegjs.majda.cz/
*/
function quote(s) {
/*
* ECMA-262, 5th ed., 7.8.4: All characters may appear literally in a
* string literal except for the closing quote character, backslash,
* carriage return, line separator, paragraph separator, and line feed.
* Any character may appear in the form of an escape sequence.
*
* For portability, we also escape escape all control and non-ASCII
* characters. Note that "\0" and "\v" escape sequences are not used
* because JSHint does not like the first and IE the second.
*/
return '"' + s
.replace(/\\/g, '\\\\') // backslash
.replace(/"/g, '\\"') // closing quote character
.replace(/\x08/g, '\\b') // backspace
.replace(/\t/g, '\\t') // horizontal tab
.replace(/\n/g, '\\n') // line feed
.replace(/\f/g, '\\f') // form feed
.replace(/\r/g, '\\r') // carriage return
.replace(/[\x00-\x07\x0B\x0E-\x1F\x80-\uFFFF]/g, escape)
+ '"';
}
var result = {
/*
* Parses the input with a generated parser. If the parsing is successfull,
* returns a value explicitly or implicitly specified by the grammar from
* which the parser was generated (see |PEG.buildParser|). If the parsing is
* unsuccessful, throws |PEG.parser.SyntaxError| describing the error.
*/
parse: function(input, startRule) {
var parseFunctions = {
"grammar": parse_grammar,
"initializer": parse_initializer,
"rule": parse_rule,
"choice": parse_choice,
"sequence": parse_sequence,
"labeled": parse_labeled,
"prefixed": parse_prefixed,
"suffixed": parse_suffixed,
"primary": parse_primary,
"action": parse_action,
"braced": parse_braced,
"nonBraceCharacters": parse_nonBraceCharacters,
"nonBraceCharacter": parse_nonBraceCharacter,
"equals": parse_equals,
"colon": parse_colon,
"semicolon": parse_semicolon,
"slash": parse_slash,
"and": parse_and,
"not": parse_not,
"question": parse_question,
"star": parse_star,
"plus": parse_plus,
"lparen": parse_lparen,
"rparen": parse_rparen,
"dot": parse_dot,
"identifier": parse_identifier,
"literal": parse_literal,
"string": parse_string,
"doubleQuotedString": parse_doubleQuotedString,
"doubleQuotedCharacter": parse_doubleQuotedCharacter,
"simpleDoubleQuotedCharacter": parse_simpleDoubleQuotedCharacter,
"singleQuotedString": parse_singleQuotedString,
"singleQuotedCharacter": parse_singleQuotedCharacter,
"simpleSingleQuotedCharacter": parse_simpleSingleQuotedCharacter,
"class": parse_class,
"classCharacterRange": parse_classCharacterRange,
"classCharacter": parse_classCharacter,
"bracketDelimitedCharacter": parse_bracketDelimitedCharacter,
"simpleBracketDelimitedCharacter": parse_simpleBracketDelimitedCharacter,
"simpleEscapeSequence": parse_simpleEscapeSequence,
"zeroEscapeSequence": parse_zeroEscapeSequence,
"hexEscapeSequence": parse_hexEscapeSequence,
"unicodeEscapeSequence": parse_unicodeEscapeSequence,
"eolEscapeSequence": parse_eolEscapeSequence,
"digit": parse_digit,
"hexDigit": parse_hexDigit,
"letter": parse_letter,
"lowerCaseLetter": parse_lowerCaseLetter,
"upperCaseLetter": parse_upperCaseLetter,
"__": parse___,
"comment": parse_comment,
"singleLineComment": parse_singleLineComment,
"multiLineComment": parse_multiLineComment,
"eol": parse_eol,
"eolChar": parse_eolChar,
"whitespace": parse_whitespace
};
if (startRule !== undefined) {
if (parseFunctions[startRule] === undefined) {
throw new Error("Invalid rule name: " + quote(startRule) + ".");
}
} else {
startRule = "grammar";
}
var pos = 0;
var reportFailures = 0;
var rightmostFailuresPos = 0;
var rightmostFailuresExpected = [];
function padLeft(input, padding, length) {
var result = input;
var padLength = length - input.length;
for (var i = 0; i < padLength; i++) {
result = padding + result;
}
return result;
}
function escape(ch) {
var charCode = ch.charCodeAt(0);
var escapeChar;
var length;
if (charCode <= 0xFF) {
escapeChar = 'x';
length = 2;
} else {
escapeChar = 'u';
length = 4;
}
return '\\' + escapeChar + padLeft(charCode.toString(16).toUpperCase(), '0', length);
}
function matchFailed(failure) {
if (pos < rightmostFailuresPos) {
return;
}
if (pos > rightmostFailuresPos) {
rightmostFailuresPos = pos;
rightmostFailuresExpected = [];
}
rightmostFailuresExpected.push(failure);
}
function parse_grammar() {
var result0, result1, result2, result3;
var pos0, pos1;
pos0 = pos;
pos1 = pos;
result0 = parse___();
if (result0 !== null) {
result1 = parse_initializer();
result1 = result1 !== null ? result1 : "";
if (result1 !== null) {
result3 = parse_rule();
if (result3 !== null) {
result2 = [];
while (result3 !== null) {
result2.push(result3);
result3 = parse_rule();
}
} else {
result2 = null;
}
if (result2 !== null) {
result0 = [result0, result1, result2];
} else {
result0 = null;
pos = pos1;
}
} else {
result0 = null;
pos = pos1;
}
} else {
result0 = null;
pos = pos1;
}
if (result0 !== null) {
result0 = (function(offset, initializer, rules) {
return {
type: "grammar",
initializer: initializer !== "" ? initializer : null,
rules: rules,
startRule: rules[0].name
};
})(pos0, result0[1], result0[2]);
}
if (result0 === null) {
pos = pos0;
}
return result0;
}
function parse_initializer() {
var result0, result1;
var pos0, pos1;
pos0 = pos;
pos1 = pos;
result0 = parse_action();
if (result0 !== null) {
result1 = parse_semicolon();
result1 = result1 !== null ? result1 : "";
if (result1 !== null) {
result0 = [result0, result1];
} else {
result0 = null;
pos = pos1;
}
} else {
result0 = null;
pos = pos1;
}
if (result0 !== null) {
result0 = (function(offset, code) {
return {
type: "initializer",
code: code
};
})(pos0, result0[0]);
}
if (result0 === null) {
pos = pos0;
}
return result0;
}
function parse_rule() {
var result0, result1, result2, result3, result4;
var pos0, pos1;
pos0 = pos;
pos1 = pos;
result0 = parse_identifier();
if (result0 !== null) {
result1 = parse_string();
result1 = result1 !== null ? result1 : "";
if (result1 !== null) {
result2 = parse_equals();
if (result2 !== null) {
result3 = parse_choice();
if (result3 !== null) {
result4 = parse_semicolon();
result4 = result4 !== null ? result4 : "";
if (result4 !== null) {
result0 = [result0, result1, result2, result3, result4];
} else {
result0 = null;
pos = pos1;
}
} else {
result0 = null;
pos = pos1;
}
} else {
result0 = null;
pos = pos1;
}
} else {
result0 = null;
pos = pos1;
}
} else {
result0 = null;
pos = pos1;
}
if (result0 !== null) {
result0 = (function(offset, name, displayName, expression) {
return {
type: "rule",
name: name,
displayName: displayName !== "" ? displayName : null,
expression: expression
};
})(pos0, result0[0], result0[1], result0[3]);
}
if (result0 === null) {
pos = pos0;
}
return result0;
}
function parse_choice() {
var result0, result1, result2, result3;
var pos0, pos1, pos2;
pos0 = pos;
pos1 = pos;
result0 = parse_sequence();
if (result0 !== null) {
result1 = [];
pos2 = pos;
result2 = parse_slash();
if (result2 !== null) {
result3 = parse_sequence();
if (result3 !== null) {
result2 = [result2, result3];
} else {
result2 = null;
pos = pos2;
}
} else {
result2 = null;
pos = pos2;
}
while (result2 !== null) {
result1.push(result2);
pos2 = pos;
result2 = parse_slash();
if (result2 !== null) {
result3 = parse_sequence();
if (result3 !== null) {
result2 = [result2, result3];
} else {
result2 = null;
pos = pos2;
}
} else {
result2 = null;
pos = pos2;
}
}
if (result1 !== null) {
result0 = [result0, result1];
} else {
result0 = null;
pos = pos1;
}
} else {
result0 = null;
pos = pos1;
}
if (result0 !== null) {
result0 = (function(offset, head, tail) {
if (tail.length > 0) {
var alternatives = [head].concat(map(
tail,
function(element) { return element[1]; }
));
return {
type: "choice",
alternatives: alternatives
};
} else {
return head;
}
})(pos0, result0[0], result0[1]);
}
if (result0 === null) {
pos = pos0;
}
return result0;
}
function parse_sequence() {
var result0, result1;
var pos0, pos1;
pos0 = pos;
pos1 = pos;
result0 = [];
result1 = parse_labeled();
while (result1 !== null) {
result0.push(result1);
result1 = parse_labeled();
}
if (result0 !== null) {
result1 = parse_action();
if (result1 !== null) {
result0 = [result0, result1];
} else {
result0 = null;
pos = pos1;
}
} else {
result0 = null;
pos = pos1;
}
if (result0 !== null) {
result0 = (function(offset, elements, code) {
var expression = elements.length !== 1
? {
type: "sequence",
elements: elements
}
: elements[0];
return {
type: "action",
expression: expression,
code: code
};
})(pos0, result0[0], result0[1]);
}
if (result0 === null) {
pos = pos0;
}
if (result0 === null) {
pos0 = pos;
result0 = [];
result1 = parse_labeled();
while (result1 !== null) {
result0.push(result1);
result1 = parse_labeled();
}
if (result0 !== null) {
result0 = (function(offset, elements) {
return elements.length !== 1
? {
type: "sequence",
elements: elements
}
: elements[0];
})(pos0, result0);
}
if (result0 === null) {
pos = pos0;
}
}
return result0;
}
function parse_labeled() {
var result0, result1, result2;
var pos0, pos1;
pos0 = pos;
pos1 = pos;
result0 = parse_identifier();
if (result0 !== null) {
result1 = parse_colon();
if (result1 !== null) {
result2 = parse_prefixed();
if (result2 !== null) {
result0 = [result0, result1, result2];
} else {
result0 = null;
pos = pos1;
}
} else {
result0 = null;
pos = pos1;
}
} else {
result0 = null;
pos = pos1;
}
if (result0 !== null) {
result0 = (function(offset, label, expression) {
return {
type: "labeled",
label: label,
expression: expression
};
})(pos0, result0[0], result0[2]);
}
if (result0 === null) {
pos = pos0;
}
if (result0 === null) {
result0 = parse_prefixed();
}
return result0;
}
function parse_prefixed() {
var result0, result1;
var pos0, pos1;
pos0 = pos;
pos1 = pos;
result0 = parse_and();
if (result0 !== null) {
result1 = parse_action();
if (result1 !== null) {
result0 = [result0, result1];
} else {
result0 = null;
pos = pos1;
}
} else {
result0 = null;
pos = pos1;
}
if (result0 !== null) {
result0 = (function(offset, code) {
return {
type: "semantic_and",
code: code
};
})(pos0, result0[1]);
}
if (result0 === null) {
pos = pos0;
}
if (result0 === null) {
pos0 = pos;
pos1 = pos;
result0 = parse_and();
if (result0 !== null) {
result1 = parse_suffixed();
if (result1 !== null) {
result0 = [result0, result1];
} else {
result0 = null;
pos = pos1;
}
} else {
result0 = null;
pos = pos1;
}
if (result0 !== null) {
result0 = (function(offset, expression) {
return {
type: "simple_and",
expression: expression
};
})(pos0, result0[1]);
}
if (result0 === null) {
pos = pos0;
}
if (result0 === null) {
pos0 = pos;
pos1 = pos;
result0 = parse_not();
if (result0 !== null) {
result1 = parse_action();
if (result1 !== null) {
result0 = [result0, result1];
} else {
result0 = null;
pos = pos1;
}
} else {
result0 = null;
pos = pos1;
}
if (result0 !== null) {
result0 = (function(offset, code) {
return {
type: "semantic_not",
code: code
};
})(pos0, result0[1]);
}
if (result0 === null) {
pos = pos0;
}
if (result0 === null) {
pos0 = pos;
pos1 = pos;
result0 = parse_not();
if (result0 !== null) {
result1 = parse_suffixed();
if (result1 !== null) {
result0 = [result0, result1];
} else {
result0 = null;
pos = pos1;
}
} else {
result0 = null;
pos = pos1;
}
if (result0 !== null) {
result0 = (function(offset, expression) {
return {
type: "simple_not",
expression: expression
};
})(pos0, result0[1]);
}
if (result0 === null) {
pos = pos0;
}
if (result0 === null) {
result0 = parse_suffixed();
}
}
}
}
return result0;
}
function parse_suffixed() {
var result0, result1;
var pos0, pos1;
pos0 = pos;
pos1 = pos;
result0 = parse_primary();
if (result0 !== null) {
result1 = parse_question();
if (result1 !== null) {
result0 = [result0, result1];
} else {
result0 = null;
pos = pos1;
}
} else {
result0 = null;
pos = pos1;
}
if (result0 !== null) {
result0 = (function(offset, expression) {
return {
type: "optional",
expression: expression
};
})(pos0, result0[0]);
}
if (result0 === null) {
pos = pos0;
}
if (result0 === null) {
pos0 = pos;
pos1 = pos;
result0 = parse_primary();
if (result0 !== null) {
result1 = parse_star();
if (result1 !== null) {
result0 = [result0, result1];
} else {
result0 = null;
pos = pos1;
}
} else {
result0 = null;
pos = pos1;
}
if (result0 !== null) {
result0 = (function(offset, expression) {
return {
type: "zero_or_more",
expression: expression
};
})(pos0, result0[0]);
}
if (result0 === null) {
pos = pos0;
}
if (result0 === null) {
pos0 = pos;
pos1 = pos;
result0 = parse_primary();
if (result0 !== null) {
result1 = parse_plus();
if (result1 !== null) {
result0 = [result0, result1];
} else {
result0 = null;
pos = pos1;
}
} else {
result0 = null;
pos = pos1;
}
if (result0 !== null) {
result0 = (function(offset, expression) {
return {
type: "one_or_more",
expression: expression
};
})(pos0, result0[0]);
}
if (result0 === null) {
pos = pos0;
}
if (result0 === null) {
result0 = parse_primary();
}
}
}
return result0;
}
function parse_primary() {
var result0, result1, result2;
var pos0, pos1, pos2, pos3;
pos0 = pos;
pos1 = pos;
result0 = parse_identifier();
if (result0 !== null) {
pos2 = pos;
reportFailures++;
pos3 = pos;
result1 = parse_string();
result1 = result1 !== null ? result1 : "";
if (result1 !== null) {
result2 = parse_equals();
if (result2 !== null) {
result1 = [result1, result2];
} else {
result1 = null;
pos = pos3;
}
} else {
result1 = null;
pos = pos3;
}
reportFailures--;
if (result1 === null) {
result1 = "";
} else {
result1 = null;
pos = pos2;
}
if (result1 !== null) {
result0 = [result0, result1];
} else {
result0 = null;
pos = pos1;
}
} else {
result0 = null;
pos = pos1;
}
if (result0 !== null) {
result0 = (function(offset, name) {
return {
type: "rule_ref",
name: name
};
})(pos0, result0[0]);
}
if (result0 === null) {
pos = pos0;
}
if (result0 === null) {
result0 = parse_literal();
if (result0 === null) {
pos0 = pos;
result0 = parse_dot();
if (result0 !== null) {
result0 = (function(offset) { return { type: "any" }; })(pos0);
}
if (result0 === null) {
pos = pos0;
}
if (result0 === null) {
result0 = parse_class();
if (result0 === null) {
pos0 = pos;
pos1 = pos;
result0 = parse_lparen();
if (result0 !== null) {
result1 = parse_choice();
if (result1 !== null) {
result2 = parse_rparen();
if (result2 !== null) {
result0 = [result0, result1, result2];
} else {
result0 = null;
pos = pos1;
}
} else {
result0 = null;
pos = pos1;
}
} else {
result0 = null;
pos = pos1;
}
if (result0 !== null) {
result0 = (function(offset, expression) { return expression; })(pos0, result0[1]);
}
if (result0 === null) {
pos = pos0;
}