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mediawiki-extensions-Visual.../modules/parser/lib.pegjs.js
Gabriel Wicke ea87e7aaee Convert PEG parser to tokenizer for back-end HTML parser. Now emits a list of 
tokens, which for now is still completely built before parsing can proceed.
For each top-level block, the source start/end positions are added as
attributes to the top-most tokens. No tracking of wiki vs. html syntax yet.
2011-11-17 15:26:02 +00:00

4796 lines
136 KiB
JavaScript
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/* PEG.js 0.6.1 (http://pegjs.majda.cz/) */
(function() {
var undefined;
var PEG = {
/* PEG.js version. */
VERSION: "0.6.1",
/*
* 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) {
return PEG.compiler.compile(PEG.parser.parse(grammar));
}
};
/* Thrown when the grammar contains an error. */
PEG.GrammarError = function(message) {
this.name = "PEG.GrammarError";
this.message = message;
};
PEG.GrammarError.prototype = Error.prototype;
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]);
}
}
function map(array, callback) {
var result = [];
var length = array.length;
for (var i = 0; i < length; i++) {
result[i] = callback(array[i]);
}
return result;
}
/*
* Returns a string padded on the left to a desired length with a character.
*
* The code needs to be in sync with th 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 th code template in the compilation
* function for "action" nodes.
*/
function escape(ch) {
var charCode = ch.charCodeAt(0);
if (charCode <= 0xFF) {
var escapeChar = 'x';
var length = 2;
} else {
var escapeChar = 'u';
var 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 th 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 non-ASCII characters.
*/
return '"' + s
.replace(/\\/g, '\\\\') // backslash
.replace(/"/g, '\\"') // closing quote character
.replace(/\r/g, '\\r') // carriage return
.replace(/\n/g, '\\n') // line feed
.replace(/[\x80-\uFFFF]/g, escape) // non-ASCII characters
+ '"';
};
/*
* 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 non-ASCII characters.
*/
return s
.replace(/\\/g, '\\\\') // backslash
.replace(/\0/g, '\\0') // null, IE needs this
.replace(/\//g, '\\/') // closing slash
.replace(/]/g, '\\]') // closing bracket
.replace(/-/g, '\\-') // dash
.replace(/\r/g, '\\r') // carriage return
.replace(/\n/g, '\\n') // line feed
.replace(/[\x80-\uFFFF]/g, escape) // non-ASCII characters
}
/*
* 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);
}
}
PEG.parser = (function(){
/* Generated by PEG.js 0.6.1 (http://pegjs.majda.cz/). */
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 = {
"__": parse___,
"action": parse_action,
"and": parse_and,
"braced": parse_braced,
"bracketDelimitedCharacter": parse_bracketDelimitedCharacter,
"choice": parse_choice,
"class": parse_class,
"classCharacter": parse_classCharacter,
"classCharacterRange": parse_classCharacterRange,
"colon": parse_colon,
"comment": parse_comment,
"digit": parse_digit,
"dot": parse_dot,
"doubleQuotedCharacter": parse_doubleQuotedCharacter,
"doubleQuotedLiteral": parse_doubleQuotedLiteral,
"eol": parse_eol,
"eolChar": parse_eolChar,
"eolEscapeSequence": parse_eolEscapeSequence,
"equals": parse_equals,
"grammar": parse_grammar,
"hexDigit": parse_hexDigit,
"hexEscapeSequence": parse_hexEscapeSequence,
"identifier": parse_identifier,
"initializer": parse_initializer,
"labeled": parse_labeled,
"letter": parse_letter,
"literal": parse_literal,
"lowerCaseLetter": parse_lowerCaseLetter,
"lparen": parse_lparen,
"multiLineComment": parse_multiLineComment,
"nonBraceCharacter": parse_nonBraceCharacter,
"nonBraceCharacters": parse_nonBraceCharacters,
"not": parse_not,
"plus": parse_plus,
"prefixed": parse_prefixed,
"primary": parse_primary,
"question": parse_question,
"rparen": parse_rparen,
"rule": parse_rule,
"semicolon": parse_semicolon,
"sequence": parse_sequence,
"simpleBracketDelimitedCharacter": parse_simpleBracketDelimitedCharacter,
"simpleDoubleQuotedCharacter": parse_simpleDoubleQuotedCharacter,
"simpleEscapeSequence": parse_simpleEscapeSequence,
"simpleSingleQuotedCharacter": parse_simpleSingleQuotedCharacter,
"singleLineComment": parse_singleLineComment,
"singleQuotedCharacter": parse_singleQuotedCharacter,
"singleQuotedLiteral": parse_singleQuotedLiteral,
"slash": parse_slash,
"star": parse_star,
"suffixed": parse_suffixed,
"unicodeEscapeSequence": parse_unicodeEscapeSequence,
"upperCaseLetter": parse_upperCaseLetter,
"whitespace": parse_whitespace,
"zeroEscapeSequence": parse_zeroEscapeSequence
};
if (startRule !== undefined) {
if (parseFunctions[startRule] === undefined) {
throw new Error("Invalid rule name: " + quote(startRule) + ".");
}
} else {
startRule = "grammar";
}
var pos = 0;
var reportMatchFailures = true;
var rightmostMatchFailuresPos = 0;
var rightmostMatchFailuresExpected = [];
var cache = {};
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);
if (charCode <= 0xFF) {
var escapeChar = 'x';
var length = 2;
} else {
var escapeChar = 'u';
var length = 4;
}
return '\\' + escapeChar + padLeft(charCode.toString(16).toUpperCase(), '0', length);
}
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.
*/
return '"' + s
.replace(/\\/g, '\\\\') // backslash
.replace(/"/g, '\\"') // closing quote character
.replace(/\r/g, '\\r') // carriage return
.replace(/\n/g, '\\n') // line feed
.replace(/[\x80-\uFFFF]/g, escape) // non-ASCII characters
+ '"';
}
function matchFailed(failure) {
if (pos < rightmostMatchFailuresPos) {
return;
}
if (pos > rightmostMatchFailuresPos) {
rightmostMatchFailuresPos = pos;
rightmostMatchFailuresExpected = [];
}
rightmostMatchFailuresExpected.push(failure);
}
function parse_grammar() {
var cacheKey = 'grammar@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
var result2 = parse___();
if (result2 !== null) {
var result6 = parse_initializer();
var result3 = result6 !== null ? result6 : '';
if (result3 !== null) {
var result5 = parse_rule();
if (result5 !== null) {
var result4 = [];
while (result5 !== null) {
result4.push(result5);
var result5 = parse_rule();
}
} else {
var result4 = null;
}
if (result4 !== null) {
var result1 = [result2, result3, result4];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function(initializer, rules) {
var rulesConverted = {};
each(rules, function(rule) { rulesConverted[rule.name] = rule; });
return {
type: "grammar",
initializer: initializer !== "" ? initializer : null,
rules: rulesConverted,
startRule: rules[0].name
}
})(result1[1], result1[2])
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_initializer() {
var cacheKey = 'initializer@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
var result2 = parse_action();
if (result2 !== null) {
var result4 = parse_semicolon();
var result3 = result4 !== null ? result4 : '';
if (result3 !== null) {
var result1 = [result2, result3];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function(code) {
return {
type: "initializer",
code: code
};
})(result1[0])
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_rule() {
var cacheKey = 'rule@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
var result2 = parse_identifier();
if (result2 !== null) {
var result9 = parse_literal();
if (result9 !== null) {
var result3 = result9;
} else {
if (input.substr(pos, 0) === "") {
var result8 = "";
pos += 0;
} else {
var result8 = null;
if (reportMatchFailures) {
matchFailed("\"\"");
}
}
if (result8 !== null) {
var result3 = result8;
} else {
var result3 = null;;
};
}
if (result3 !== null) {
var result4 = parse_equals();
if (result4 !== null) {
var result5 = parse_choice();
if (result5 !== null) {
var result7 = parse_semicolon();
var result6 = result7 !== null ? result7 : '';
if (result6 !== null) {
var result1 = [result2, result3, result4, result5, result6];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function(name, displayName, expression) {
return {
type: "rule",
name: name,
displayName: displayName !== "" ? displayName : null,
expression: expression
};
})(result1[0], result1[1], result1[3])
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_choice() {
var cacheKey = 'choice@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
var result2 = parse_sequence();
if (result2 !== null) {
var result3 = [];
var savedPos1 = pos;
var result5 = parse_slash();
if (result5 !== null) {
var result6 = parse_sequence();
if (result6 !== null) {
var result4 = [result5, result6];
} else {
var result4 = null;
pos = savedPos1;
}
} else {
var result4 = null;
pos = savedPos1;
}
while (result4 !== null) {
result3.push(result4);
var savedPos1 = pos;
var result5 = parse_slash();
if (result5 !== null) {
var result6 = parse_sequence();
if (result6 !== null) {
var result4 = [result5, result6];
} else {
var result4 = null;
pos = savedPos1;
}
} else {
var result4 = null;
pos = savedPos1;
}
}
if (result3 !== null) {
var result1 = [result2, result3];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function(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;
}
})(result1[0], result1[1])
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_sequence() {
var cacheKey = 'sequence@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
var result6 = [];
var result8 = parse_labeled();
while (result8 !== null) {
result6.push(result8);
var result8 = parse_labeled();
}
if (result6 !== null) {
var result7 = parse_action();
if (result7 !== null) {
var result5 = [result6, result7];
} else {
var result5 = null;
pos = savedPos0;
}
} else {
var result5 = null;
pos = savedPos0;
}
var result4 = result5 !== null
? (function(elements, code) {
var expression = elements.length != 1
? {
type: "sequence",
elements: elements
}
: elements[0];
return {
type: "action",
expression: expression,
code: code
};
})(result5[0], result5[1])
: null;
if (result4 !== null) {
var result0 = result4;
} else {
var result2 = [];
var result3 = parse_labeled();
while (result3 !== null) {
result2.push(result3);
var result3 = parse_labeled();
}
var result1 = result2 !== null
? (function(elements) {
return elements.length != 1
? {
type: "sequence",
elements: elements
}
: elements[0];
})(result2)
: null;
if (result1 !== null) {
var result0 = result1;
} else {
var result0 = null;;
};
}
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_labeled() {
var cacheKey = 'labeled@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
var result4 = parse_identifier();
if (result4 !== null) {
var result5 = parse_colon();
if (result5 !== null) {
var result6 = parse_prefixed();
if (result6 !== null) {
var result3 = [result4, result5, result6];
} else {
var result3 = null;
pos = savedPos0;
}
} else {
var result3 = null;
pos = savedPos0;
}
} else {
var result3 = null;
pos = savedPos0;
}
var result2 = result3 !== null
? (function(label, expression) {
return {
type: "labeled",
label: label,
expression: expression
};
})(result3[0], result3[2])
: null;
if (result2 !== null) {
var result0 = result2;
} else {
var result1 = parse_prefixed();
if (result1 !== null) {
var result0 = result1;
} else {
var result0 = null;;
};
}
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_prefixed() {
var cacheKey = 'prefixed@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos3 = pos;
var result16 = parse_and();
if (result16 !== null) {
var result17 = parse_action();
if (result17 !== null) {
var result15 = [result16, result17];
} else {
var result15 = null;
pos = savedPos3;
}
} else {
var result15 = null;
pos = savedPos3;
}
var result14 = result15 !== null
? (function(code) {
return {
type: "semantic_and",
code: code
};
})(result15[1])
: null;
if (result14 !== null) {
var result0 = result14;
} else {
var savedPos2 = pos;
var result12 = parse_and();
if (result12 !== null) {
var result13 = parse_suffixed();
if (result13 !== null) {
var result11 = [result12, result13];
} else {
var result11 = null;
pos = savedPos2;
}
} else {
var result11 = null;
pos = savedPos2;
}
var result10 = result11 !== null
? (function(expression) {
return {
type: "simple_and",
expression: expression
};
})(result11[1])
: null;
if (result10 !== null) {
var result0 = result10;
} else {
var savedPos1 = pos;
var result8 = parse_not();
if (result8 !== null) {
var result9 = parse_action();
if (result9 !== null) {
var result7 = [result8, result9];
} else {
var result7 = null;
pos = savedPos1;
}
} else {
var result7 = null;
pos = savedPos1;
}
var result6 = result7 !== null
? (function(code) {
return {
type: "semantic_not",
code: code
};
})(result7[1])
: null;
if (result6 !== null) {
var result0 = result6;
} else {
var savedPos0 = pos;
var result4 = parse_not();
if (result4 !== null) {
var result5 = parse_suffixed();
if (result5 !== null) {
var result3 = [result4, result5];
} else {
var result3 = null;
pos = savedPos0;
}
} else {
var result3 = null;
pos = savedPos0;
}
var result2 = result3 !== null
? (function(expression) {
return {
type: "simple_not",
expression: expression
};
})(result3[1])
: null;
if (result2 !== null) {
var result0 = result2;
} else {
var result1 = parse_suffixed();
if (result1 !== null) {
var result0 = result1;
} else {
var result0 = null;;
};
};
};
};
}
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_suffixed() {
var cacheKey = 'suffixed@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos2 = pos;
var result12 = parse_primary();
if (result12 !== null) {
var result13 = parse_question();
if (result13 !== null) {
var result11 = [result12, result13];
} else {
var result11 = null;
pos = savedPos2;
}
} else {
var result11 = null;
pos = savedPos2;
}
var result10 = result11 !== null
? (function(expression) {
return {
type: "optional",
expression: expression
};
})(result11[0])
: null;
if (result10 !== null) {
var result0 = result10;
} else {
var savedPos1 = pos;
var result8 = parse_primary();
if (result8 !== null) {
var result9 = parse_star();
if (result9 !== null) {
var result7 = [result8, result9];
} else {
var result7 = null;
pos = savedPos1;
}
} else {
var result7 = null;
pos = savedPos1;
}
var result6 = result7 !== null
? (function(expression) {
return {
type: "zero_or_more",
expression: expression
};
})(result7[0])
: null;
if (result6 !== null) {
var result0 = result6;
} else {
var savedPos0 = pos;
var result4 = parse_primary();
if (result4 !== null) {
var result5 = parse_plus();
if (result5 !== null) {
var result3 = [result4, result5];
} else {
var result3 = null;
pos = savedPos0;
}
} else {
var result3 = null;
pos = savedPos0;
}
var result2 = result3 !== null
? (function(expression) {
return {
type: "one_or_more",
expression: expression
};
})(result3[0])
: null;
if (result2 !== null) {
var result0 = result2;
} else {
var result1 = parse_primary();
if (result1 !== null) {
var result0 = result1;
} else {
var result0 = null;;
};
};
};
}
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_primary() {
var cacheKey = 'primary@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos1 = pos;
var result13 = parse_identifier();
if (result13 !== null) {
var savedPos2 = pos;
var savedReportMatchFailuresVar0 = reportMatchFailures;
reportMatchFailures = false;
var savedPos3 = pos;
var result19 = parse_literal();
if (result19 !== null) {
var result16 = result19;
} else {
if (input.substr(pos, 0) === "") {
var result18 = "";
pos += 0;
} else {
var result18 = null;
if (reportMatchFailures) {
matchFailed("\"\"");
}
}
if (result18 !== null) {
var result16 = result18;
} else {
var result16 = null;;
};
}
if (result16 !== null) {
var result17 = parse_equals();
if (result17 !== null) {
var result15 = [result16, result17];
} else {
var result15 = null;
pos = savedPos3;
}
} else {
var result15 = null;
pos = savedPos3;
}
reportMatchFailures = savedReportMatchFailuresVar0;
if (result15 === null) {
var result14 = '';
} else {
var result14 = null;
pos = savedPos2;
}
if (result14 !== null) {
var result12 = [result13, result14];
} else {
var result12 = null;
pos = savedPos1;
}
} else {
var result12 = null;
pos = savedPos1;
}
var result11 = result12 !== null
? (function(name) {
return {
type: "rule_ref",
name: name
};
})(result12[0])
: null;
if (result11 !== null) {
var result0 = result11;
} else {
var result10 = parse_literal();
var result9 = result10 !== null
? (function(value) {
return {
type: "literal",
value: value
};
})(result10)
: null;
if (result9 !== null) {
var result0 = result9;
} else {
var result8 = parse_dot();
var result7 = result8 !== null
? (function() { return { type: "any" }; })()
: null;
if (result7 !== null) {
var result0 = result7;
} else {
var result6 = parse_class();
if (result6 !== null) {
var result0 = result6;
} else {
var savedPos0 = pos;
var result3 = parse_lparen();
if (result3 !== null) {
var result4 = parse_choice();
if (result4 !== null) {
var result5 = parse_rparen();
if (result5 !== null) {
var result2 = [result3, result4, result5];
} else {
var result2 = null;
pos = savedPos0;
}
} else {
var result2 = null;
pos = savedPos0;
}
} else {
var result2 = null;
pos = savedPos0;
}
var result1 = result2 !== null
? (function(expression) { return expression; })(result2[1])
: null;
if (result1 !== null) {
var result0 = result1;
} else {
var result0 = null;;
};
};
};
};
}
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_action() {
var cacheKey = 'action@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedReportMatchFailures = reportMatchFailures;
reportMatchFailures = false;
var savedPos0 = pos;
var result2 = parse_braced();
if (result2 !== null) {
var result3 = parse___();
if (result3 !== null) {
var result1 = [result2, result3];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function(braced) { return braced.substr(1, braced.length - 2); })(result1[0])
: null;
reportMatchFailures = savedReportMatchFailures;
if (reportMatchFailures && result0 === null) {
matchFailed("action");
}
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_braced() {
var cacheKey = 'braced@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
if (input.substr(pos, 1) === "{") {
var result2 = "{";
pos += 1;
} else {
var result2 = null;
if (reportMatchFailures) {
matchFailed("\"{\"");
}
}
if (result2 !== null) {
var result3 = [];
var result7 = parse_braced();
if (result7 !== null) {
var result5 = result7;
} else {
var result6 = parse_nonBraceCharacter();
if (result6 !== null) {
var result5 = result6;
} else {
var result5 = null;;
};
}
while (result5 !== null) {
result3.push(result5);
var result7 = parse_braced();
if (result7 !== null) {
var result5 = result7;
} else {
var result6 = parse_nonBraceCharacter();
if (result6 !== null) {
var result5 = result6;
} else {
var result5 = null;;
};
}
}
if (result3 !== null) {
if (input.substr(pos, 1) === "}") {
var result4 = "}";
pos += 1;
} else {
var result4 = null;
if (reportMatchFailures) {
matchFailed("\"}\"");
}
}
if (result4 !== null) {
var result1 = [result2, result3, result4];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function(parts) {
return "{" + parts.join("") + "}";
})(result1[1])
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_nonBraceCharacters() {
var cacheKey = 'nonBraceCharacters@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var result2 = parse_nonBraceCharacter();
if (result2 !== null) {
var result1 = [];
while (result2 !== null) {
result1.push(result2);
var result2 = parse_nonBraceCharacter();
}
} else {
var result1 = null;
}
var result0 = result1 !== null
? (function(chars) { return chars.join(""); })(result1)
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_nonBraceCharacter() {
var cacheKey = 'nonBraceCharacter@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
if (input.substr(pos).match(/^[^{}]/) !== null) {
var result0 = input.charAt(pos);
pos++;
} else {
var result0 = null;
if (reportMatchFailures) {
matchFailed("[^{}]");
}
}
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_equals() {
var cacheKey = 'equals@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
if (input.substr(pos, 1) === "=") {
var result2 = "=";
pos += 1;
} else {
var result2 = null;
if (reportMatchFailures) {
matchFailed("\"=\"");
}
}
if (result2 !== null) {
var result3 = parse___();
if (result3 !== null) {
var result1 = [result2, result3];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function() { return "="; })()
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_colon() {
var cacheKey = 'colon@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
if (input.substr(pos, 1) === ":") {
var result2 = ":";
pos += 1;
} else {
var result2 = null;
if (reportMatchFailures) {
matchFailed("\":\"");
}
}
if (result2 !== null) {
var result3 = parse___();
if (result3 !== null) {
var result1 = [result2, result3];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function() { return ":"; })()
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_semicolon() {
var cacheKey = 'semicolon@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
if (input.substr(pos, 1) === ";") {
var result2 = ";";
pos += 1;
} else {
var result2 = null;
if (reportMatchFailures) {
matchFailed("\";\"");
}
}
if (result2 !== null) {
var result3 = parse___();
if (result3 !== null) {
var result1 = [result2, result3];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function() { return ";"; })()
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_slash() {
var cacheKey = 'slash@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
if (input.substr(pos, 1) === "/") {
var result2 = "/";
pos += 1;
} else {
var result2 = null;
if (reportMatchFailures) {
matchFailed("\"/\"");
}
}
if (result2 !== null) {
var result3 = parse___();
if (result3 !== null) {
var result1 = [result2, result3];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function() { return "/"; })()
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_and() {
var cacheKey = 'and@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
if (input.substr(pos, 1) === "&") {
var result2 = "&";
pos += 1;
} else {
var result2 = null;
if (reportMatchFailures) {
matchFailed("\"&\"");
}
}
if (result2 !== null) {
var result3 = parse___();
if (result3 !== null) {
var result1 = [result2, result3];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function() { return "&"; })()
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_not() {
var cacheKey = 'not@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
if (input.substr(pos, 1) === "!") {
var result2 = "!";
pos += 1;
} else {
var result2 = null;
if (reportMatchFailures) {
matchFailed("\"!\"");
}
}
if (result2 !== null) {
var result3 = parse___();
if (result3 !== null) {
var result1 = [result2, result3];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function() { return "!"; })()
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_question() {
var cacheKey = 'question@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
if (input.substr(pos, 1) === "?") {
var result2 = "?";
pos += 1;
} else {
var result2 = null;
if (reportMatchFailures) {
matchFailed("\"?\"");
}
}
if (result2 !== null) {
var result3 = parse___();
if (result3 !== null) {
var result1 = [result2, result3];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function() { return "?"; })()
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_star() {
var cacheKey = 'star@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
if (input.substr(pos, 1) === "*") {
var result2 = "*";
pos += 1;
} else {
var result2 = null;
if (reportMatchFailures) {
matchFailed("\"*\"");
}
}
if (result2 !== null) {
var result3 = parse___();
if (result3 !== null) {
var result1 = [result2, result3];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function() { return "*"; })()
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_plus() {
var cacheKey = 'plus@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
if (input.substr(pos, 1) === "+") {
var result2 = "+";
pos += 1;
} else {
var result2 = null;
if (reportMatchFailures) {
matchFailed("\"+\"");
}
}
if (result2 !== null) {
var result3 = parse___();
if (result3 !== null) {
var result1 = [result2, result3];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function() { return "+"; })()
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_lparen() {
var cacheKey = 'lparen@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
if (input.substr(pos, 1) === "(") {
var result2 = "(";
pos += 1;
} else {
var result2 = null;
if (reportMatchFailures) {
matchFailed("\"(\"");
}
}
if (result2 !== null) {
var result3 = parse___();
if (result3 !== null) {
var result1 = [result2, result3];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function() { return "("; })()
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_rparen() {
var cacheKey = 'rparen@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
if (input.substr(pos, 1) === ")") {
var result2 = ")";
pos += 1;
} else {
var result2 = null;
if (reportMatchFailures) {
matchFailed("\")\"");
}
}
if (result2 !== null) {
var result3 = parse___();
if (result3 !== null) {
var result1 = [result2, result3];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function() { return ")"; })()
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_dot() {
var cacheKey = 'dot@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
if (input.substr(pos, 1) === ".") {
var result2 = ".";
pos += 1;
} else {
var result2 = null;
if (reportMatchFailures) {
matchFailed("\".\"");
}
}
if (result2 !== null) {
var result3 = parse___();
if (result3 !== null) {
var result1 = [result2, result3];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function() { return "."; })()
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_identifier() {
var cacheKey = 'identifier@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedReportMatchFailures = reportMatchFailures;
reportMatchFailures = false;
var savedPos0 = pos;
var result12 = parse_letter();
if (result12 !== null) {
var result2 = result12;
} else {
if (input.substr(pos, 1) === "_") {
var result11 = "_";
pos += 1;
} else {
var result11 = null;
if (reportMatchFailures) {
matchFailed("\"_\"");
}
}
if (result11 !== null) {
var result2 = result11;
} else {
if (input.substr(pos, 1) === "$") {
var result10 = "$";
pos += 1;
} else {
var result10 = null;
if (reportMatchFailures) {
matchFailed("\"$\"");
}
}
if (result10 !== null) {
var result2 = result10;
} else {
var result2 = null;;
};
};
}
if (result2 !== null) {
var result3 = [];
var result9 = parse_letter();
if (result9 !== null) {
var result5 = result9;
} else {
var result8 = parse_digit();
if (result8 !== null) {
var result5 = result8;
} else {
if (input.substr(pos, 1) === "_") {
var result7 = "_";
pos += 1;
} else {
var result7 = null;
if (reportMatchFailures) {
matchFailed("\"_\"");
}
}
if (result7 !== null) {
var result5 = result7;
} else {
if (input.substr(pos, 1) === "$") {
var result6 = "$";
pos += 1;
} else {
var result6 = null;
if (reportMatchFailures) {
matchFailed("\"$\"");
}
}
if (result6 !== null) {
var result5 = result6;
} else {
var result5 = null;;
};
};
};
}
while (result5 !== null) {
result3.push(result5);
var result9 = parse_letter();
if (result9 !== null) {
var result5 = result9;
} else {
var result8 = parse_digit();
if (result8 !== null) {
var result5 = result8;
} else {
if (input.substr(pos, 1) === "_") {
var result7 = "_";
pos += 1;
} else {
var result7 = null;
if (reportMatchFailures) {
matchFailed("\"_\"");
}
}
if (result7 !== null) {
var result5 = result7;
} else {
if (input.substr(pos, 1) === "$") {
var result6 = "$";
pos += 1;
} else {
var result6 = null;
if (reportMatchFailures) {
matchFailed("\"$\"");
}
}
if (result6 !== null) {
var result5 = result6;
} else {
var result5 = null;;
};
};
};
}
}
if (result3 !== null) {
var result4 = parse___();
if (result4 !== null) {
var result1 = [result2, result3, result4];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function(head, tail) {
return head + tail.join("");
})(result1[0], result1[1])
: null;
reportMatchFailures = savedReportMatchFailures;
if (reportMatchFailures && result0 === null) {
matchFailed("identifier");
}
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_literal() {
var cacheKey = 'literal@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedReportMatchFailures = reportMatchFailures;
reportMatchFailures = false;
var savedPos0 = pos;
var result5 = parse_doubleQuotedLiteral();
if (result5 !== null) {
var result2 = result5;
} else {
var result4 = parse_singleQuotedLiteral();
if (result4 !== null) {
var result2 = result4;
} else {
var result2 = null;;
};
}
if (result2 !== null) {
var result3 = parse___();
if (result3 !== null) {
var result1 = [result2, result3];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function(literal) { return literal; })(result1[0])
: null;
reportMatchFailures = savedReportMatchFailures;
if (reportMatchFailures && result0 === null) {
matchFailed("literal");
}
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_doubleQuotedLiteral() {
var cacheKey = 'doubleQuotedLiteral@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
if (input.substr(pos, 1) === "\"") {
var result2 = "\"";
pos += 1;
} else {
var result2 = null;
if (reportMatchFailures) {
matchFailed("\"\\\"\"");
}
}
if (result2 !== null) {
var result3 = [];
var result5 = parse_doubleQuotedCharacter();
while (result5 !== null) {
result3.push(result5);
var result5 = parse_doubleQuotedCharacter();
}
if (result3 !== null) {
if (input.substr(pos, 1) === "\"") {
var result4 = "\"";
pos += 1;
} else {
var result4 = null;
if (reportMatchFailures) {
matchFailed("\"\\\"\"");
}
}
if (result4 !== null) {
var result1 = [result2, result3, result4];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function(chars) { return chars.join(""); })(result1[1])
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_doubleQuotedCharacter() {
var cacheKey = 'doubleQuotedCharacter@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var result6 = parse_simpleDoubleQuotedCharacter();
if (result6 !== null) {
var result0 = result6;
} else {
var result5 = parse_simpleEscapeSequence();
if (result5 !== null) {
var result0 = result5;
} else {
var result4 = parse_zeroEscapeSequence();
if (result4 !== null) {
var result0 = result4;
} else {
var result3 = parse_hexEscapeSequence();
if (result3 !== null) {
var result0 = result3;
} else {
var result2 = parse_unicodeEscapeSequence();
if (result2 !== null) {
var result0 = result2;
} else {
var result1 = parse_eolEscapeSequence();
if (result1 !== null) {
var result0 = result1;
} else {
var result0 = null;;
};
};
};
};
};
}
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_simpleDoubleQuotedCharacter() {
var cacheKey = 'simpleDoubleQuotedCharacter@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
var savedPos1 = pos;
var savedReportMatchFailuresVar0 = reportMatchFailures;
reportMatchFailures = false;
if (input.substr(pos, 1) === "\"") {
var result7 = "\"";
pos += 1;
} else {
var result7 = null;
if (reportMatchFailures) {
matchFailed("\"\\\"\"");
}
}
if (result7 !== null) {
var result4 = result7;
} else {
if (input.substr(pos, 1) === "\\") {
var result6 = "\\";
pos += 1;
} else {
var result6 = null;
if (reportMatchFailures) {
matchFailed("\"\\\\\"");
}
}
if (result6 !== null) {
var result4 = result6;
} else {
var result5 = parse_eolChar();
if (result5 !== null) {
var result4 = result5;
} else {
var result4 = null;;
};
};
}
reportMatchFailures = savedReportMatchFailuresVar0;
if (result4 === null) {
var result2 = '';
} else {
var result2 = null;
pos = savedPos1;
}
if (result2 !== null) {
if (input.length > pos) {
var result3 = input.charAt(pos);
pos++;
} else {
var result3 = null;
if (reportMatchFailures) {
matchFailed('any character');
}
}
if (result3 !== null) {
var result1 = [result2, result3];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function(char_) { return char_; })(result1[1])
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_singleQuotedLiteral() {
var cacheKey = 'singleQuotedLiteral@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
if (input.substr(pos, 1) === "'") {
var result2 = "'";
pos += 1;
} else {
var result2 = null;
if (reportMatchFailures) {
matchFailed("\"'\"");
}
}
if (result2 !== null) {
var result3 = [];
var result5 = parse_singleQuotedCharacter();
while (result5 !== null) {
result3.push(result5);
var result5 = parse_singleQuotedCharacter();
}
if (result3 !== null) {
if (input.substr(pos, 1) === "'") {
var result4 = "'";
pos += 1;
} else {
var result4 = null;
if (reportMatchFailures) {
matchFailed("\"'\"");
}
}
if (result4 !== null) {
var result1 = [result2, result3, result4];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function(chars) { return chars.join(""); })(result1[1])
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_singleQuotedCharacter() {
var cacheKey = 'singleQuotedCharacter@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var result6 = parse_simpleSingleQuotedCharacter();
if (result6 !== null) {
var result0 = result6;
} else {
var result5 = parse_simpleEscapeSequence();
if (result5 !== null) {
var result0 = result5;
} else {
var result4 = parse_zeroEscapeSequence();
if (result4 !== null) {
var result0 = result4;
} else {
var result3 = parse_hexEscapeSequence();
if (result3 !== null) {
var result0 = result3;
} else {
var result2 = parse_unicodeEscapeSequence();
if (result2 !== null) {
var result0 = result2;
} else {
var result1 = parse_eolEscapeSequence();
if (result1 !== null) {
var result0 = result1;
} else {
var result0 = null;;
};
};
};
};
};
}
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_simpleSingleQuotedCharacter() {
var cacheKey = 'simpleSingleQuotedCharacter@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
var savedPos1 = pos;
var savedReportMatchFailuresVar0 = reportMatchFailures;
reportMatchFailures = false;
if (input.substr(pos, 1) === "'") {
var result7 = "'";
pos += 1;
} else {
var result7 = null;
if (reportMatchFailures) {
matchFailed("\"'\"");
}
}
if (result7 !== null) {
var result4 = result7;
} else {
if (input.substr(pos, 1) === "\\") {
var result6 = "\\";
pos += 1;
} else {
var result6 = null;
if (reportMatchFailures) {
matchFailed("\"\\\\\"");
}
}
if (result6 !== null) {
var result4 = result6;
} else {
var result5 = parse_eolChar();
if (result5 !== null) {
var result4 = result5;
} else {
var result4 = null;;
};
};
}
reportMatchFailures = savedReportMatchFailuresVar0;
if (result4 === null) {
var result2 = '';
} else {
var result2 = null;
pos = savedPos1;
}
if (result2 !== null) {
if (input.length > pos) {
var result3 = input.charAt(pos);
pos++;
} else {
var result3 = null;
if (reportMatchFailures) {
matchFailed('any character');
}
}
if (result3 !== null) {
var result1 = [result2, result3];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function(char_) { return char_; })(result1[1])
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_class() {
var cacheKey = 'class@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedReportMatchFailures = reportMatchFailures;
reportMatchFailures = false;
var savedPos0 = pos;
if (input.substr(pos, 1) === "[") {
var result2 = "[";
pos += 1;
} else {
var result2 = null;
if (reportMatchFailures) {
matchFailed("\"[\"");
}
}
if (result2 !== null) {
if (input.substr(pos, 1) === "^") {
var result10 = "^";
pos += 1;
} else {
var result10 = null;
if (reportMatchFailures) {
matchFailed("\"^\"");
}
}
var result3 = result10 !== null ? result10 : '';
if (result3 !== null) {
var result4 = [];
var result9 = parse_classCharacterRange();
if (result9 !== null) {
var result7 = result9;
} else {
var result8 = parse_classCharacter();
if (result8 !== null) {
var result7 = result8;
} else {
var result7 = null;;
};
}
while (result7 !== null) {
result4.push(result7);
var result9 = parse_classCharacterRange();
if (result9 !== null) {
var result7 = result9;
} else {
var result8 = parse_classCharacter();
if (result8 !== null) {
var result7 = result8;
} else {
var result7 = null;;
};
}
}
if (result4 !== null) {
if (input.substr(pos, 1) === "]") {
var result5 = "]";
pos += 1;
} else {
var result5 = null;
if (reportMatchFailures) {
matchFailed("\"]\"");
}
}
if (result5 !== null) {
var result6 = parse___();
if (result6 !== null) {
var result1 = [result2, result3, result4, result5, result6];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function(inverted, parts) {
var partsConverted = map(parts, function(part) { return part.data; });
var rawText = "["
+ inverted
+ map(parts, function(part) { return part.rawText; }).join("")
+ "]";
return {
type: "class",
inverted: inverted === "^",
parts: partsConverted,
// FIXME: Get the raw text from the input directly.
rawText: rawText
};
})(result1[1], result1[2])
: null;
reportMatchFailures = savedReportMatchFailures;
if (reportMatchFailures && result0 === null) {
matchFailed("character class");
}
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_classCharacterRange() {
var cacheKey = 'classCharacterRange@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
var result2 = parse_classCharacter();
if (result2 !== null) {
if (input.substr(pos, 1) === "-") {
var result3 = "-";
pos += 1;
} else {
var result3 = null;
if (reportMatchFailures) {
matchFailed("\"-\"");
}
}
if (result3 !== null) {
var result4 = parse_classCharacter();
if (result4 !== null) {
var result1 = [result2, result3, result4];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function(begin, end) {
if (begin.data.charCodeAt(0) > end.data.charCodeAt(0)) {
throw new this.SyntaxError(
"Invalid character range: " + begin.rawText + "-" + end.rawText + "."
);
}
return {
data: [begin.data, end.data],
// FIXME: Get the raw text from the input directly.
rawText: begin.rawText + "-" + end.rawText
}
})(result1[0], result1[2])
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_classCharacter() {
var cacheKey = 'classCharacter@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var result1 = parse_bracketDelimitedCharacter();
var result0 = result1 !== null
? (function(char_) {
return {
data: char_,
// FIXME: Get the raw text from the input directly.
rawText: quoteForRegexpClass(char_)
};
})(result1)
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_bracketDelimitedCharacter() {
var cacheKey = 'bracketDelimitedCharacter@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var result6 = parse_simpleBracketDelimitedCharacter();
if (result6 !== null) {
var result0 = result6;
} else {
var result5 = parse_simpleEscapeSequence();
if (result5 !== null) {
var result0 = result5;
} else {
var result4 = parse_zeroEscapeSequence();
if (result4 !== null) {
var result0 = result4;
} else {
var result3 = parse_hexEscapeSequence();
if (result3 !== null) {
var result0 = result3;
} else {
var result2 = parse_unicodeEscapeSequence();
if (result2 !== null) {
var result0 = result2;
} else {
var result1 = parse_eolEscapeSequence();
if (result1 !== null) {
var result0 = result1;
} else {
var result0 = null;;
};
};
};
};
};
}
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_simpleBracketDelimitedCharacter() {
var cacheKey = 'simpleBracketDelimitedCharacter@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
var savedPos1 = pos;
var savedReportMatchFailuresVar0 = reportMatchFailures;
reportMatchFailures = false;
if (input.substr(pos, 1) === "]") {
var result7 = "]";
pos += 1;
} else {
var result7 = null;
if (reportMatchFailures) {
matchFailed("\"]\"");
}
}
if (result7 !== null) {
var result4 = result7;
} else {
if (input.substr(pos, 1) === "\\") {
var result6 = "\\";
pos += 1;
} else {
var result6 = null;
if (reportMatchFailures) {
matchFailed("\"\\\\\"");
}
}
if (result6 !== null) {
var result4 = result6;
} else {
var result5 = parse_eolChar();
if (result5 !== null) {
var result4 = result5;
} else {
var result4 = null;;
};
};
}
reportMatchFailures = savedReportMatchFailuresVar0;
if (result4 === null) {
var result2 = '';
} else {
var result2 = null;
pos = savedPos1;
}
if (result2 !== null) {
if (input.length > pos) {
var result3 = input.charAt(pos);
pos++;
} else {
var result3 = null;
if (reportMatchFailures) {
matchFailed('any character');
}
}
if (result3 !== null) {
var result1 = [result2, result3];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function(char_) { return char_; })(result1[1])
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_simpleEscapeSequence() {
var cacheKey = 'simpleEscapeSequence@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
if (input.substr(pos, 1) === "\\") {
var result2 = "\\";
pos += 1;
} else {
var result2 = null;
if (reportMatchFailures) {
matchFailed("\"\\\\\"");
}
}
if (result2 !== null) {
var savedPos1 = pos;
var savedReportMatchFailuresVar0 = reportMatchFailures;
reportMatchFailures = false;
var result9 = parse_digit();
if (result9 !== null) {
var result5 = result9;
} else {
if (input.substr(pos, 1) === "x") {
var result8 = "x";
pos += 1;
} else {
var result8 = null;
if (reportMatchFailures) {
matchFailed("\"x\"");
}
}
if (result8 !== null) {
var result5 = result8;
} else {
if (input.substr(pos, 1) === "u") {
var result7 = "u";
pos += 1;
} else {
var result7 = null;
if (reportMatchFailures) {
matchFailed("\"u\"");
}
}
if (result7 !== null) {
var result5 = result7;
} else {
var result6 = parse_eolChar();
if (result6 !== null) {
var result5 = result6;
} else {
var result5 = null;;
};
};
};
}
reportMatchFailures = savedReportMatchFailuresVar0;
if (result5 === null) {
var result3 = '';
} else {
var result3 = null;
pos = savedPos1;
}
if (result3 !== null) {
if (input.length > pos) {
var result4 = input.charAt(pos);
pos++;
} else {
var result4 = null;
if (reportMatchFailures) {
matchFailed('any character');
}
}
if (result4 !== null) {
var result1 = [result2, result3, result4];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function(char_) {
return char_
.replace("b", "\b")
.replace("f", "\f")
.replace("n", "\n")
.replace("r", "\r")
.replace("t", "\t")
.replace("v", "\x0B") // IE does not recognize "\v".
})(result1[2])
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_zeroEscapeSequence() {
var cacheKey = 'zeroEscapeSequence@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
if (input.substr(pos, 2) === "\\0") {
var result2 = "\\0";
pos += 2;
} else {
var result2 = null;
if (reportMatchFailures) {
matchFailed("\"\\\\0\"");
}
}
if (result2 !== null) {
var savedPos1 = pos;
var savedReportMatchFailuresVar0 = reportMatchFailures;
reportMatchFailures = false;
var result4 = parse_digit();
reportMatchFailures = savedReportMatchFailuresVar0;
if (result4 === null) {
var result3 = '';
} else {
var result3 = null;
pos = savedPos1;
}
if (result3 !== null) {
var result1 = [result2, result3];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function() { return "\0"; })()
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_hexEscapeSequence() {
var cacheKey = 'hexEscapeSequence@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
if (input.substr(pos, 2) === "\\x") {
var result2 = "\\x";
pos += 2;
} else {
var result2 = null;
if (reportMatchFailures) {
matchFailed("\"\\\\x\"");
}
}
if (result2 !== null) {
var result3 = parse_hexDigit();
if (result3 !== null) {
var result4 = parse_hexDigit();
if (result4 !== null) {
var result1 = [result2, result3, result4];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function(h1, h2) {
return String.fromCharCode(parseInt("0x" + h1 + h2));
})(result1[1], result1[2])
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_unicodeEscapeSequence() {
var cacheKey = 'unicodeEscapeSequence@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
if (input.substr(pos, 2) === "\\u") {
var result2 = "\\u";
pos += 2;
} else {
var result2 = null;
if (reportMatchFailures) {
matchFailed("\"\\\\u\"");
}
}
if (result2 !== null) {
var result3 = parse_hexDigit();
if (result3 !== null) {
var result4 = parse_hexDigit();
if (result4 !== null) {
var result5 = parse_hexDigit();
if (result5 !== null) {
var result6 = parse_hexDigit();
if (result6 !== null) {
var result1 = [result2, result3, result4, result5, result6];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function(h1, h2, h3, h4) {
return String.fromCharCode(parseInt("0x" + h1 + h2 + h3 + h4));
})(result1[1], result1[2], result1[3], result1[4])
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_eolEscapeSequence() {
var cacheKey = 'eolEscapeSequence@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
if (input.substr(pos, 1) === "\\") {
var result2 = "\\";
pos += 1;
} else {
var result2 = null;
if (reportMatchFailures) {
matchFailed("\"\\\\\"");
}
}
if (result2 !== null) {
var result3 = parse_eol();
if (result3 !== null) {
var result1 = [result2, result3];
} else {
var result1 = null;
pos = savedPos0;
}
} else {
var result1 = null;
pos = savedPos0;
}
var result0 = result1 !== null
? (function(eol) { return eol; })(result1[1])
: null;
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_digit() {
var cacheKey = 'digit@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
if (input.substr(pos).match(/^[0-9]/) !== null) {
var result0 = input.charAt(pos);
pos++;
} else {
var result0 = null;
if (reportMatchFailures) {
matchFailed("[0-9]");
}
}
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_hexDigit() {
var cacheKey = 'hexDigit@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
if (input.substr(pos).match(/^[0-9a-fA-F]/) !== null) {
var result0 = input.charAt(pos);
pos++;
} else {
var result0 = null;
if (reportMatchFailures) {
matchFailed("[0-9a-fA-F]");
}
}
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_letter() {
var cacheKey = 'letter@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var result2 = parse_lowerCaseLetter();
if (result2 !== null) {
var result0 = result2;
} else {
var result1 = parse_upperCaseLetter();
if (result1 !== null) {
var result0 = result1;
} else {
var result0 = null;;
};
}
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_lowerCaseLetter() {
var cacheKey = 'lowerCaseLetter@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
if (input.substr(pos).match(/^[a-z]/) !== null) {
var result0 = input.charAt(pos);
pos++;
} else {
var result0 = null;
if (reportMatchFailures) {
matchFailed("[a-z]");
}
}
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_upperCaseLetter() {
var cacheKey = 'upperCaseLetter@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
if (input.substr(pos).match(/^[A-Z]/) !== null) {
var result0 = input.charAt(pos);
pos++;
} else {
var result0 = null;
if (reportMatchFailures) {
matchFailed("[A-Z]");
}
}
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse___() {
var cacheKey = '__@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var result0 = [];
var result4 = parse_whitespace();
if (result4 !== null) {
var result1 = result4;
} else {
var result3 = parse_eol();
if (result3 !== null) {
var result1 = result3;
} else {
var result2 = parse_comment();
if (result2 !== null) {
var result1 = result2;
} else {
var result1 = null;;
};
};
}
while (result1 !== null) {
result0.push(result1);
var result4 = parse_whitespace();
if (result4 !== null) {
var result1 = result4;
} else {
var result3 = parse_eol();
if (result3 !== null) {
var result1 = result3;
} else {
var result2 = parse_comment();
if (result2 !== null) {
var result1 = result2;
} else {
var result1 = null;;
};
};
}
}
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_comment() {
var cacheKey = 'comment@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedReportMatchFailures = reportMatchFailures;
reportMatchFailures = false;
var result2 = parse_singleLineComment();
if (result2 !== null) {
var result0 = result2;
} else {
var result1 = parse_multiLineComment();
if (result1 !== null) {
var result0 = result1;
} else {
var result0 = null;;
};
}
reportMatchFailures = savedReportMatchFailures;
if (reportMatchFailures && result0 === null) {
matchFailed("comment");
}
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_singleLineComment() {
var cacheKey = 'singleLineComment@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
if (input.substr(pos, 2) === "//") {
var result1 = "//";
pos += 2;
} else {
var result1 = null;
if (reportMatchFailures) {
matchFailed("\"//\"");
}
}
if (result1 !== null) {
var result2 = [];
var savedPos1 = pos;
var savedPos2 = pos;
var savedReportMatchFailuresVar0 = reportMatchFailures;
reportMatchFailures = false;
var result6 = parse_eolChar();
reportMatchFailures = savedReportMatchFailuresVar0;
if (result6 === null) {
var result4 = '';
} else {
var result4 = null;
pos = savedPos2;
}
if (result4 !== null) {
if (input.length > pos) {
var result5 = input.charAt(pos);
pos++;
} else {
var result5 = null;
if (reportMatchFailures) {
matchFailed('any character');
}
}
if (result5 !== null) {
var result3 = [result4, result5];
} else {
var result3 = null;
pos = savedPos1;
}
} else {
var result3 = null;
pos = savedPos1;
}
while (result3 !== null) {
result2.push(result3);
var savedPos1 = pos;
var savedPos2 = pos;
var savedReportMatchFailuresVar0 = reportMatchFailures;
reportMatchFailures = false;
var result6 = parse_eolChar();
reportMatchFailures = savedReportMatchFailuresVar0;
if (result6 === null) {
var result4 = '';
} else {
var result4 = null;
pos = savedPos2;
}
if (result4 !== null) {
if (input.length > pos) {
var result5 = input.charAt(pos);
pos++;
} else {
var result5 = null;
if (reportMatchFailures) {
matchFailed('any character');
}
}
if (result5 !== null) {
var result3 = [result4, result5];
} else {
var result3 = null;
pos = savedPos1;
}
} else {
var result3 = null;
pos = savedPos1;
}
}
if (result2 !== null) {
var result0 = [result1, result2];
} else {
var result0 = null;
pos = savedPos0;
}
} else {
var result0 = null;
pos = savedPos0;
}
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_multiLineComment() {
var cacheKey = 'multiLineComment@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedPos0 = pos;
if (input.substr(pos, 2) === "/*") {
var result1 = "/*";
pos += 2;
} else {
var result1 = null;
if (reportMatchFailures) {
matchFailed("\"/*\"");
}
}
if (result1 !== null) {
var result2 = [];
var savedPos1 = pos;
var savedPos2 = pos;
var savedReportMatchFailuresVar0 = reportMatchFailures;
reportMatchFailures = false;
if (input.substr(pos, 2) === "*/") {
var result7 = "*/";
pos += 2;
} else {
var result7 = null;
if (reportMatchFailures) {
matchFailed("\"*/\"");
}
}
reportMatchFailures = savedReportMatchFailuresVar0;
if (result7 === null) {
var result5 = '';
} else {
var result5 = null;
pos = savedPos2;
}
if (result5 !== null) {
if (input.length > pos) {
var result6 = input.charAt(pos);
pos++;
} else {
var result6 = null;
if (reportMatchFailures) {
matchFailed('any character');
}
}
if (result6 !== null) {
var result4 = [result5, result6];
} else {
var result4 = null;
pos = savedPos1;
}
} else {
var result4 = null;
pos = savedPos1;
}
while (result4 !== null) {
result2.push(result4);
var savedPos1 = pos;
var savedPos2 = pos;
var savedReportMatchFailuresVar0 = reportMatchFailures;
reportMatchFailures = false;
if (input.substr(pos, 2) === "*/") {
var result7 = "*/";
pos += 2;
} else {
var result7 = null;
if (reportMatchFailures) {
matchFailed("\"*/\"");
}
}
reportMatchFailures = savedReportMatchFailuresVar0;
if (result7 === null) {
var result5 = '';
} else {
var result5 = null;
pos = savedPos2;
}
if (result5 !== null) {
if (input.length > pos) {
var result6 = input.charAt(pos);
pos++;
} else {
var result6 = null;
if (reportMatchFailures) {
matchFailed('any character');
}
}
if (result6 !== null) {
var result4 = [result5, result6];
} else {
var result4 = null;
pos = savedPos1;
}
} else {
var result4 = null;
pos = savedPos1;
}
}
if (result2 !== null) {
if (input.substr(pos, 2) === "*/") {
var result3 = "*/";
pos += 2;
} else {
var result3 = null;
if (reportMatchFailures) {
matchFailed("\"*/\"");
}
}
if (result3 !== null) {
var result0 = [result1, result2, result3];
} else {
var result0 = null;
pos = savedPos0;
}
} else {
var result0 = null;
pos = savedPos0;
}
} else {
var result0 = null;
pos = savedPos0;
}
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_eol() {
var cacheKey = 'eol@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedReportMatchFailures = reportMatchFailures;
reportMatchFailures = false;
if (input.substr(pos, 1) === "\n") {
var result5 = "\n";
pos += 1;
} else {
var result5 = null;
if (reportMatchFailures) {
matchFailed("\"\\n\"");
}
}
if (result5 !== null) {
var result0 = result5;
} else {
if (input.substr(pos, 2) === "\r\n") {
var result4 = "\r\n";
pos += 2;
} else {
var result4 = null;
if (reportMatchFailures) {
matchFailed("\"\\r\\n\"");
}
}
if (result4 !== null) {
var result0 = result4;
} else {
if (input.substr(pos, 1) === "\r") {
var result3 = "\r";
pos += 1;
} else {
var result3 = null;
if (reportMatchFailures) {
matchFailed("\"\\r\"");
}
}
if (result3 !== null) {
var result0 = result3;
} else {
if (input.substr(pos, 1) === "\u2028") {
var result2 = "\u2028";
pos += 1;
} else {
var result2 = null;
if (reportMatchFailures) {
matchFailed("\"\\u2028\"");
}
}
if (result2 !== null) {
var result0 = result2;
} else {
if (input.substr(pos, 1) === "\u2029") {
var result1 = "\u2029";
pos += 1;
} else {
var result1 = null;
if (reportMatchFailures) {
matchFailed("\"\\u2029\"");
}
}
if (result1 !== null) {
var result0 = result1;
} else {
var result0 = null;;
};
};
};
};
}
reportMatchFailures = savedReportMatchFailures;
if (reportMatchFailures && result0 === null) {
matchFailed("end of line");
}
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_eolChar() {
var cacheKey = 'eolChar@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
if (input.substr(pos).match(/^[\n\r\u2028\u2029]/) !== null) {
var result0 = input.charAt(pos);
pos++;
} else {
var result0 = null;
if (reportMatchFailures) {
matchFailed("[\\n\\r\\u2028\\u2029]");
}
}
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function parse_whitespace() {
var cacheKey = 'whitespace@' + pos;
var cachedResult = cache[cacheKey];
if (cachedResult) {
pos = cachedResult.nextPos;
return cachedResult.result;
}
var savedReportMatchFailures = reportMatchFailures;
reportMatchFailures = false;
if (input.substr(pos).match(/^[ <20><>\xA0\uFEFF\u1680\u180E\u2000-\u200A\u202F\u205F\u3000]/) !== null) {
var result0 = input.charAt(pos);
pos++;
} else {
var result0 = null;
if (reportMatchFailures) {
matchFailed("[ <20><>\\xA0\\uFEFF\\u1680\\u180E\\u2000-\\u200A\\u202F\\u205F\\u3000]");
}
}
reportMatchFailures = savedReportMatchFailures;
if (reportMatchFailures && result0 === null) {
matchFailed("whitespace");
}
cache[cacheKey] = {
nextPos: pos,
result: result0
};
return result0;
}
function buildErrorMessage() {
function buildExpected(failuresExpected) {
failuresExpected.sort();
var lastFailure = null;
var failuresExpectedUnique = [];
for (var i = 0; i < failuresExpected.length; i++) {
if (failuresExpected[i] !== lastFailure) {
failuresExpectedUnique.push(failuresExpected[i]);
lastFailure = failuresExpected[i];
}
}
switch (failuresExpectedUnique.length) {
case 0:
return 'end of input';
case 1:
return failuresExpectedUnique[0];
default:
return failuresExpectedUnique.slice(0, failuresExpectedUnique.length - 1).join(', ')
+ ' or '
+ failuresExpectedUnique[failuresExpectedUnique.length - 1];
}
}
var expected = buildExpected(rightmostMatchFailuresExpected);
var actualPos = Math.max(pos, rightmostMatchFailuresPos);
var actual = actualPos < input.length
? quote(input.charAt(actualPos))
: 'end of input';
return 'Expected ' + expected + ' but ' + actual + ' found.';
}
function computeErrorPosition() {
/*
* The first idea was to use |String.split| to break the input up to the
* error position along newlines and derive the line and column from
* there. However IE's |split| implementation is so broken that it was
* enough to prevent it.
*/
var line = 1;
var column = 1;
var seenCR = false;
for (var i = 0; i < rightmostMatchFailuresPos; i++) {
var ch = input.charAt(i);
if (ch === '\n') {
if (!seenCR) { line++; }
column = 1;
seenCR = false;
} else if (ch === '\r' | ch === '\u2028' || ch === '\u2029') {
line++;
column = 1;
seenCR = true;
} else {
column++;
seenCR = false;
}
}
return { line: line, column: column };
}
var result = parseFunctions[startRule]();
/*
* The parser is now in one of the following three states:
*
* 1. The parser successfully parsed the whole input.
*
* - |result !== null|
* - |pos === input.length|
* - |rightmostMatchFailuresExpected| may or may not contain something
*
* 2. The parser successfully parsed only a part of the input.
*
* - |result !== null|
* - |pos < input.length|
* - |rightmostMatchFailuresExpected| may or may not contain something
*
* 3. The parser did not successfully parse any part of the input.
*
* - |result === null|
* - |pos === 0|
* - |rightmostMatchFailuresExpected| contains at least one failure
*
* All code following this comment (including called functions) must
* handle these states.
*/
if (result === null || pos !== input.length) {
var errorPosition = computeErrorPosition();
throw new this.SyntaxError(
buildErrorMessage(),
errorPosition.line,
errorPosition.column
);
}
return result;
},
/* Returns the parser source code. */
toSource: function() { return this._source; }
};
/* Thrown when a parser encounters a syntax error. */
result.SyntaxError = function(message, line, column) {
this.name = 'SyntaxError';
this.message = message;
this.line = line;
this.column = column;
};
result.SyntaxError.prototype = Error.prototype;
return result;
})();
PEG.compiler = {
/*
* Generates a parser from a specified grammar AST. Throws |PEG.GrammarError|
* if the AST 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.
*/
compile: function(ast) {
var CHECK_NAMES = [
"missingReferencedRules",
"leftRecursion"
];
var PASS_NAMES = [
"proxyRules"
];
for (var i = 0; i < CHECK_NAMES.length; i++) {
this.checks[CHECK_NAMES[i]](ast);
}
for (var i = 0; i < PASS_NAMES.length; i++) {
ast = this.passes[PASS_NAMES[i]](ast);
}
var source = this.emitter(ast);
//console.log(source);
var result = eval(source);
result._source = source;
return result;
}
};
/*
* Checks made on the grammar AST before compilation. Each check is a function
* that is passed the AST and does not return anything. If the check passes, the
* function does not do anything special, otherwise it throws
* |PEG.GrammarError|. The order in which the checks are run is specified in
* |PEG.compiler.compile| and should be the same as the order of definitions
* here.
*/
PEG.compiler.checks = {
/* Checks that all referenced rules exist. */
missingReferencedRules: function(ast) {
function nop() {}
function checkExpression(node) { check(node.expression); }
function checkSubnodes(propertyName) {
return function(node) { each(node[propertyName], check); };
}
var check = buildNodeVisitor({
grammar:
function(node) {
for (var name in node.rules) {
check(node.rules[name]);
}
},
rule: checkExpression,
choice: checkSubnodes("alternatives"),
sequence: checkSubnodes("elements"),
labeled: checkExpression,
simple_and: checkExpression,
simple_not: checkExpression,
semantic_and: nop,
semantic_not: nop,
optional: checkExpression,
zero_or_more: checkExpression,
one_or_more: checkExpression,
action: checkExpression,
rule_ref:
function(node) {
if (ast.rules[node.name] === undefined) {
throw new PEG.GrammarError(
"Referenced rule \"" + node.name + "\" does not exist."
);
}
},
literal: nop,
any: nop,
"class": nop
});
check(ast);
},
/* Checks that no left recursion is present. */
leftRecursion: function(ast) {
function nop() {}
function checkExpression(node, appliedRules) {
check(node.expression, appliedRules);
}
var check = buildNodeVisitor({
grammar:
function(node, appliedRules) {
for (var name in node.rules) {
check(node.rules[name], appliedRules);
}
},
rule:
function(node, appliedRules) {
check(node.expression, appliedRules.concat(node.name));
},
choice:
function(node, appliedRules) {
each(node.alternatives, function(alternative) {
check(alternative, appliedRules);
});
},
sequence:
function(node, appliedRules) {
if (node.elements.length > 0) {
check(node.elements[0], appliedRules);
}
},
labeled: checkExpression,
simple_and: checkExpression,
simple_not: checkExpression,
semantic_and: nop,
semantic_not: nop,
optional: checkExpression,
zero_or_more: checkExpression,
one_or_more: checkExpression,
action: checkExpression,
rule_ref:
function(node, appliedRules) {
if (contains(appliedRules, node.name)) {
throw new PEG.GrammarError(
"Left recursion detected for rule \"" + node.name + "\"."
);
}
check(ast.rules[node.name], appliedRules);
},
literal: nop,
any: nop,
"class": nop
});
check(ast, []);
}
};
/*
* Optimalization passes made on the grammar AST before compilation. Each pass
* is a function that is passed the AST and returns a new AST. The AST can be
* modified in-place by the pass. The order in which the passes are run is
* specified in |PEG.compiler.compile| and should be the same as the order of
* definitions here.
*/
PEG.compiler.passes = {
/*
* Removes proxy rules -- that is, rules that only delegate to other rule.
*/
proxyRules: function(ast) {
function isProxyRule(node) {
return node.type === "rule" && node.expression.type === "rule_ref";
}
function replaceRuleRefs(ast, from, to) {
function nop() {}
function replaceInExpression(node, from, to) {
replace(node.expression, from, to);
}
function replaceInSubnodes(propertyName) {
return function(node, from, to) {
each(node[propertyName], function(subnode) {
replace(subnode, from, to);
});
};
}
var replace = buildNodeVisitor({
grammar:
function(node, from, to) {
for (var name in node.rules) {
replace(node.rules[name], from, to);
}
},
rule: replaceInExpression,
choice: replaceInSubnodes("alternatives"),
sequence: replaceInSubnodes("elements"),
labeled: replaceInExpression,
simple_and: replaceInExpression,
simple_not: replaceInExpression,
semantic_and: nop,
semantic_not: nop,
optional: replaceInExpression,
zero_or_more: replaceInExpression,
one_or_more: replaceInExpression,
action: replaceInExpression,
rule_ref:
function(node, from, to) {
if (node.name === from) {
node.name = to;
}
},
literal: nop,
any: nop,
"class": nop
});
replace(ast, from, to);
}
for (var name in ast.rules) {
if (isProxyRule(ast.rules[name])) {
replaceRuleRefs(ast, ast.rules[name].name, ast.rules[name].expression.name);
if (name === ast.startRule) {
ast.startRule = ast.rules[name].expression.name;
}
delete ast.rules[name];
}
}
return ast;
}
};
/* Emits the generated code for the AST. */
PEG.compiler.emitter = function(ast) {
/*
* Takes parts of code, interpolates variables inside them and joins them with
* a newline.
*
* Variables are delimited with "${" and "}" and their names must be valid
* identifiers (i.e. they must match [a-zA-Z_][a-zA-Z0-9_]*). Variable values
* are specified as properties of the last parameter (if this is an object,
* otherwise empty variable set is assumed). Undefined variables result in
* throwing |Error|.
*
* There can be a filter specified after the variable name, prefixed with "|".
* The filter name must be a valid identifier. The only recognized filter
* right now is "string", which quotes the variable value as a JavaScript
* string. Unrecognized filters result in throwing |Error|.
*
* If any part has multiple lines and the first line is indented by some
* amount of whitespace (as defined by the /\s+/ JavaScript regular
* expression), second to last lines are indented by the same amount of
* whitespace. This results in nicely indented multiline code in variables
* without making the templates look ugly.
*
* Examples:
*
* formatCode("foo", "bar"); // "foo\nbar"
* formatCode("foo", "${bar}", { bar: "baz" }); // "foo\nbaz"
* formatCode("foo", "${bar}"); // throws Error
* formatCode("foo", "${bar|string}", { bar: "baz" }); // "foo\n\"baz\""
* formatCode("foo", "${bar|eeek}", { bar: "baz" }); // throws Error
* formatCode("foo", "${bar}", { bar: " baz\nqux" }); // "foo\n baz\n qux"
*/
function formatCode() {
function interpolateVariablesInParts(parts) {
return map(parts, function(part) {
return part.replace(
/\$\{([a-zA-Z_][a-zA-Z0-9_]*)(\|([a-zA-Z_][a-zA-Z0-9_]*))?\}/g,
function(match, name, dummy, filter) {
var value = vars[name];
if (value === undefined) {
throw new Error("Undefined variable: \"" + name + "\".");
}
if (filter !== undefined && filter != "") { // JavaScript engines differ here.
if (filter === "string") {
return quote(value);
} else {
throw new Error("Unrecognized filter: \"" + filter + "\".");
}
} else {
return value;
}
}
);
});
}
function indentMultilineParts(parts) {
return map(parts, function(part) {
if (!/\n/.test(part)) { return part; }
var firstLineWhitespacePrefix = part.match(/^\s*/)[0];
var lines = part.split("\n");
var linesIndented = [lines[0]].concat(
map(lines.slice(1), function(line) {
return firstLineWhitespacePrefix + line;
})
);
return linesIndented.join("\n");
});
}
var args = Array.prototype.slice.call(arguments);
var vars = args[args.length - 1] instanceof Object ? args.pop() : {};
return indentMultilineParts(interpolateVariablesInParts(args)).join("\n");
};
/* Unique ID generator. */
var UID = {
_counters: {},
next: function(prefix) {
this._counters[prefix] = this._counters[prefix] || 0;
return prefix + this._counters[prefix]++;
},
reset: function() {
this._counters = {};
}
};
var emit = buildNodeVisitor({
grammar: function(node) {
var initializerCode = node.initializer !== null
? emit(node.initializer)
: "";
var parseFunctionTableItems = [];
for (var name in node.rules) {
parseFunctionTableItems.push(quote(name) + ": parse_" + name);
}
parseFunctionTableItems.sort();
var parseFunctionDefinitions = [];
for (var name in node.rules) {
parseFunctionDefinitions.push(emit(node.rules[name]));
}
return formatCode(
"(function(){",
" /* Generated by PEG.js 0.6.1 (http://pegjs.majda.cz/). */",
" ",
" 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 = {",
" ${parseFunctionTableItems}",
" };",
" ",
" if (startRule !== undefined) {",
" if (parseFunctions[startRule] === undefined) {",
" throw new Error(\"Invalid rule name: \" + quote(startRule) + \".\");",
" }",
" } else {",
" startRule = ${startRule|string};",
" }",
" ",
" var pos = 0;",
" var reportMatchFailures = true;",
" var rightmostMatchFailuresPos = 0;",
" var rightmostMatchFailuresExpected = [];",
" var cache = {};",
" ",
/* This needs to be in sync with |padLeft| in utils.js. */
" 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;",
" }",
" ",
/* This needs to be in sync with |escape| in utils.js. */
" function escape(ch) {",
" var charCode = ch.charCodeAt(0);",
" ",
" if (charCode <= 0xFF) {",
" var escapeChar = 'x';",
" var length = 2;",
" } else {",
" var escapeChar = 'u';",
" var length = 4;",
" }",
" ",
" return '\\\\' + escapeChar + padLeft(charCode.toString(16).toUpperCase(), '0', length);",
" }",
" ",
/* This needs to be in sync with |quote| in utils.js. */
" 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.",
" */",
" return '\"' + s",
" .replace(/\\\\/g, '\\\\\\\\') // backslash",
" .replace(/\"/g, '\\\\\"') // closing quote character",
" .replace(/\\r/g, '\\\\r') // carriage return",
" .replace(/\\n/g, '\\\\n') // line feed",
" .replace(/[\\x80-\\uFFFF]/g, escape) // non-ASCII characters",
" + '\"';",
" }",
" ",
" function matchFailed(failure) {",
" if (pos < rightmostMatchFailuresPos) {",
" return;",
" }",
" ",
" if (pos > rightmostMatchFailuresPos) {",
" rightmostMatchFailuresPos = pos;",
" rightmostMatchFailuresExpected = [];",
" }",
" ",
" rightmostMatchFailuresExpected.push(failure);",
" }",
" ",
" ${parseFunctionDefinitions}",
" ",
" function buildErrorMessage() {",
" function buildExpected(failuresExpected) {",
" failuresExpected.sort();",
" ",
" var lastFailure = null;",
" var failuresExpectedUnique = [];",
" for (var i = 0; i < failuresExpected.length; i++) {",
" if (failuresExpected[i] !== lastFailure) {",
" failuresExpectedUnique.push(failuresExpected[i]);",
" lastFailure = failuresExpected[i];",
" }",
" }",
" ",
" switch (failuresExpectedUnique.length) {",
" case 0:",
" return 'end of input';",
" case 1:",
" return failuresExpectedUnique[0];",
" default:",
" return failuresExpectedUnique.slice(0, failuresExpectedUnique.length - 1).join(', ')",
" + ' or '",
" + failuresExpectedUnique[failuresExpectedUnique.length - 1];",
" }",
" }",
" ",
" var expected = buildExpected(rightmostMatchFailuresExpected);",
" var actualPos = Math.max(pos, rightmostMatchFailuresPos);",
" var actual = actualPos < input.length",
" ? quote(input.charAt(actualPos))",
" : 'end of input';",
" ",
" return 'Expected ' + expected + ' but ' + actual + ' found.';",
" }",
" ",
" function computeErrorPosition() {",
" /*",
" * The first idea was to use |String.split| to break the input up to the",
" * error position along newlines and derive the line and column from",
" * there. However IE's |split| implementation is so broken that it was",
" * enough to prevent it.",
" */",
" ",
" var line = 1;",
" var column = 1;",
" var seenCR = false;",
" ",
" for (var i = 0; i < rightmostMatchFailuresPos; i++) {",
" var ch = input.charAt(i);",
" if (ch === '\\n') {",
" if (!seenCR) { line++; }",
" column = 1;",
" seenCR = false;",
" } else if (ch === '\\r' | ch === '\\u2028' || ch === '\\u2029') {",
" line++;",
" column = 1;",
" seenCR = true;",
" } else {",
" column++;",
" seenCR = false;",
" }",
" }",
" ",
" return { line: line, column: column };",
" }",
" ",
" ${initializerCode}",
" ",
" var result = parseFunctions[startRule]();",
" ",
" /*",
" * The parser is now in one of the following three states:",
" *",
" * 1. The parser successfully parsed the whole input.",
" *",
" * - |result !== null|",
" * - |pos === input.length|",
" * - |rightmostMatchFailuresExpected| may or may not contain something",
" *",
" * 2. The parser successfully parsed only a part of the input.",
" *",
" * - |result !== null|",
" * - |pos < input.length|",
" * - |rightmostMatchFailuresExpected| may or may not contain something",
" *",
" * 3. The parser did not successfully parse any part of the input.",
" *",
" * - |result === null|",
" * - |pos === 0|",
" * - |rightmostMatchFailuresExpected| contains at least one failure",
" *",
" * All code following this comment (including called functions) must",
" * handle these states.",
" */",
" if (result === null || pos !== input.length) {",
" var errorPosition = computeErrorPosition();",
" throw new this.SyntaxError(",
" buildErrorMessage(),",
" errorPosition.line,",
" errorPosition.column",
" );",
" }",
" ",
" return result;",
" },",
" ",
" /* Returns the parser source code. */",
" toSource: function() { return this._source; }",
" };",
" ",
" /* Thrown when a parser encounters a syntax error. */",
" ",
" result.SyntaxError = function(message, line, column) {",
" this.name = 'SyntaxError';",
" this.message = message;",
" this.line = line;",
" this.column = column;",
" };",
" ",
" result.SyntaxError.prototype = Error.prototype;",
" ",
" return result;",
"})()",
{
initializerCode: initializerCode,
parseFunctionTableItems: parseFunctionTableItems.join(",\n"),
parseFunctionDefinitions: parseFunctionDefinitions.join("\n\n"),
startRule: node.startRule
}
);
},
initializer: function(node) {
return node.code;
},
rule: function(node) {
/*
* We want to reset variable names at the beginning of every function so
* that a little change in the source grammar does not change variables in
* all the generated code. This is desired especially when one has the
* generated grammar stored in a VCS (this is true e.g. for our
* metagrammar).
*/
UID.reset();
var resultVar = UID.next("result");
if (node.displayName !== null) {
var setReportMatchFailuresCode = formatCode(
"var savedReportMatchFailures = reportMatchFailures;",
"reportMatchFailures = false;"
);
var restoreReportMatchFailuresCode = formatCode(
"reportMatchFailures = savedReportMatchFailures;"
);
var reportMatchFailureCode = formatCode(
"if (reportMatchFailures && ${resultVar} === null) {",
" matchFailed(${displayName|string});",
"}",
{
displayName: node.displayName,
resultVar: resultVar
}
);
} else {
var setReportMatchFailuresCode = "";
var restoreReportMatchFailuresCode = "";
var reportMatchFailureCode = "";
}
return formatCode(
"function parse_${name}() {",
" var cacheKey = '${name}@' + pos;",
" var cachedResult = cache[cacheKey];",
" if (cachedResult) {",
" pos = cachedResult.nextPos;",
" return cachedResult.result;",
" }",
" ",
" ${setReportMatchFailuresCode}",
" ${code}",
" ${restoreReportMatchFailuresCode}",
" ${reportMatchFailureCode}",
" ",
" cache[cacheKey] = {",
" nextPos: pos,",
" result: ${resultVar}",
" };",
" return ${resultVar};",
"}",
{
name: node.name,
setReportMatchFailuresCode: setReportMatchFailuresCode,
restoreReportMatchFailuresCode: restoreReportMatchFailuresCode,
reportMatchFailureCode: reportMatchFailureCode,
code: emit(node.expression, resultVar),
resultVar: resultVar
}
);
},
/*
* The contract for all code fragments generated by the following functions
* is as follows:
*
* * The code fragment should try to match a part of the input starting with
* the position indicated in |pos|. That position may point past the end of
* the input.
*
* * If the code fragment matches the input, it advances |pos| after the
* matched part of the input and sets variable with a name stored in
* |resultVar| to appropriate value, which is always non-null.
*
* * If the code fragment does not match the input, it does not change |pos|
* and it sets a variable with a name stored in |resultVar| to |null|.
*/
choice: function(node, resultVar) {
var code = formatCode(
"var ${resultVar} = null;",
{ resultVar: resultVar }
);
for (var i = node.alternatives.length - 1; i >= 0; i--) {
var alternativeResultVar = UID.next("result");
code = formatCode(
"${alternativeCode}",
"if (${alternativeResultVar} !== null) {",
" var ${resultVar} = ${alternativeResultVar};",
"} else {",
" ${code};",
"}",
{
alternativeCode: emit(node.alternatives[i], alternativeResultVar),
alternativeResultVar: alternativeResultVar,
code: code,
resultVar: resultVar
}
);
}
return code;
},
sequence: function(node, resultVar) {
var savedPosVar = UID.next("savedPos");
var elementResultVars = map(node.elements, function() {
return UID.next("result")
});
var code = formatCode(
"var ${resultVar} = ${elementResultVarArray};",
{
resultVar: resultVar,
elementResultVarArray: "[" + elementResultVars.join(", ") + "]"
}
);
for (var i = node.elements.length - 1; i >= 0; i--) {
code = formatCode(
"${elementCode}",
"if (${elementResultVar} !== null) {",
" ${code}",
"} else {",
" var ${resultVar} = null;",
" pos = ${savedPosVar};",
"}",
{
elementCode: emit(node.elements[i], elementResultVars[i]),
elementResultVar: elementResultVars[i],
code: code,
savedPosVar: savedPosVar,
resultVar: resultVar
}
);
}
return formatCode(
"var ${savedPosVar} = pos;",
"${code}",
{
code: code,
savedPosVar: savedPosVar
}
);
},
labeled: function(node, resultVar) {
return emit(node.expression, resultVar);
},
simple_and: function(node, resultVar) {
var savedPosVar = UID.next("savedPos");
var savedReportMatchFailuresVar = UID.next("savedReportMatchFailuresVar");
var expressionResultVar = UID.next("result");
return formatCode(
"var ${savedPosVar} = pos;",
"var ${savedReportMatchFailuresVar} = reportMatchFailures;",
"reportMatchFailures = false;",
"${expressionCode}",
"reportMatchFailures = ${savedReportMatchFailuresVar};",
"if (${expressionResultVar} !== null) {",
" var ${resultVar} = '';",
" pos = ${savedPosVar};",
"} else {",
" var ${resultVar} = null;",
"}",
{
expressionCode: emit(node.expression, expressionResultVar),
expressionResultVar: expressionResultVar,
savedPosVar: savedPosVar,
savedReportMatchFailuresVar: savedReportMatchFailuresVar,
resultVar: resultVar
}
);
},
simple_not: function(node, resultVar) {
var savedPosVar = UID.next("savedPos");
var savedReportMatchFailuresVar = UID.next("savedReportMatchFailuresVar");
var expressionResultVar = UID.next("result");
return formatCode(
"var ${savedPosVar} = pos;",
"var ${savedReportMatchFailuresVar} = reportMatchFailures;",
"reportMatchFailures = false;",
"${expressionCode}",
"reportMatchFailures = ${savedReportMatchFailuresVar};",
"if (${expressionResultVar} === null) {",
" var ${resultVar} = '';",
"} else {",
" var ${resultVar} = null;",
" pos = ${savedPosVar};",
"}",
{
expressionCode: emit(node.expression, expressionResultVar),
expressionResultVar: expressionResultVar,
savedPosVar: savedPosVar,
savedReportMatchFailuresVar: savedReportMatchFailuresVar,
resultVar: resultVar
}
);
},
semantic_and: function(node, resultVar) {
return formatCode(
"var ${resultVar} = (function() {${actionCode}})() ? '' : null;",
{
actionCode: node.code,
resultVar: resultVar
}
);
},
semantic_not: function(node, resultVar) {
return formatCode(
"var ${resultVar} = (function() {${actionCode}})() ? null : '';",
{
actionCode: node.code,
resultVar: resultVar
}
);
},
optional: function(node, resultVar) {
var expressionResultVar = UID.next("result");
return formatCode(
"${expressionCode}",
"var ${resultVar} = ${expressionResultVar} !== null ? ${expressionResultVar} : '';",
{
expressionCode: emit(node.expression, expressionResultVar),
expressionResultVar: expressionResultVar,
resultVar: resultVar
}
);
},
zero_or_more: function(node, resultVar) {
var expressionResultVar = UID.next("result");
return formatCode(
"var ${resultVar} = [];",
"${expressionCode}",
"while (${expressionResultVar} !== null) {",
" ${resultVar}.push(${expressionResultVar});",
" ${expressionCode}",
"}",
{
expressionCode: emit(node.expression, expressionResultVar),
expressionResultVar: expressionResultVar,
resultVar: resultVar
}
);
},
one_or_more: function(node, resultVar) {
var expressionResultVar = UID.next("result");
return formatCode(
"${expressionCode}",
"if (${expressionResultVar} !== null) {",
" var ${resultVar} = [];",
" while (${expressionResultVar} !== null) {",
" ${resultVar}.push(${expressionResultVar});",
" ${expressionCode}",
" }",
"} else {",
" var ${resultVar} = null;",
"}",
{
expressionCode: emit(node.expression, expressionResultVar),
expressionResultVar: expressionResultVar,
resultVar: resultVar
}
);
},
action: function(node, resultVar) {
/*
* In case of sequences, we splat their elements into function arguments
* one by one. Example:
*
* start: a:"a" b:"b" c:"c" { alert(arguments.length) } // => 3
*
* This behavior is reflected in this function.
*/
var expressionResultVar = UID.next("result");
if (node.expression.type === "sequence") {
var formalParams = [];
var actualParams = [];
var elements = node.expression.elements;
var elementsLength = elements.length;
for (var i = 0; i < elementsLength; i++) {
if (elements[i].type === "labeled") {
formalParams.push(elements[i].label);
actualParams.push(expressionResultVar + "[" + i + "]");
}
}
} else if (node.expression.type === "labeled") {
var formalParams = [node.expression.label];
var actualParams = [expressionResultVar];
} else {
var formalParams = [];
var actualParams = [];
}
return formatCode(
"${expressionCode}",
"var ${resultVar} = ${expressionResultVar} !== null",
" ? (function(${formalParams}) {${actionCode}})(${actualParams})",
" : null;",
{
expressionCode: emit(node.expression, expressionResultVar),
expressionResultVar: expressionResultVar,
actionCode: node.code,
formalParams: formalParams.join(", "),
actualParams: actualParams.join(", "),
resultVar: resultVar
}
);
},
rule_ref: function(node, resultVar) {
return formatCode(
"var ${resultVar} = ${ruleMethod}();",
{
ruleMethod: "parse_" + node.name,
resultVar: resultVar
}
);
},
literal: function(node, resultVar) {
return formatCode(
"if (input.substr(pos, ${length}) === ${value|string}) {",
" var ${resultVar} = ${value|string};",
" pos += ${length};",
"} else {",
" var ${resultVar} = null;",
" if (reportMatchFailures) {",
" matchFailed(${valueQuoted|string});",
" }",
"}",
{
value: node.value,
valueQuoted: quote(node.value),
length: node.value.length,
resultVar: resultVar
}
);
},
any: function(node, resultVar) {
return formatCode(
"if (input.length > pos) {",
" var ${resultVar} = input.charAt(pos);",
" pos++;",
"} else {",
" var ${resultVar} = null;",
" if (reportMatchFailures) {",
" matchFailed('any character');",
" }",
"}",
{ resultVar: resultVar }
);
},
"class": function(node, resultVar) {
if (node.parts.length > 0) {
var regexp = "/^["
+ (node.inverted ? "^" : "")
+ map(node.parts, function(part) {
return part instanceof Array
? quoteForRegexpClass(part[0])
+ "-"
+ quoteForRegexpClass(part[1])
: quoteForRegexpClass(part);
}).join("")
+ "]/";
} else {
/*
* Stupid IE considers regexps /[]/ and /[^]/ syntactically invalid, so
* we translate them into euqivalents it can handle.
*/
var regexp = node.inverted ? "/^[\\S\\s]/" : "/^(?!)/";
}
return formatCode(
"if (input.substr(pos).match(${regexp}) !== null) {",
" var ${resultVar} = input.charAt(pos);",
" pos++;",
"} else {",
" var ${resultVar} = null;",
" if (reportMatchFailures) {",
" matchFailed(${rawText|string});",
" }",
"}",
{
regexp: regexp,
rawText: node.rawText,
resultVar: resultVar
}
);
}
});
return emit(ast);
};
if (typeof module === "object") {
module.exports = PEG;
} else if (typeof window === "object") {
window.PEG = PEG;
} else {
throw new Error("Can't export PEG library (no \"module\" nor \"window\" object detected).");
}
})();
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