chess.js
Version:
[](https://github.com/jhlywa/chess.js/actions) [](https://www.npmjs.com/package/chess.js) [
1,314 lines (1,180 loc) • 33.5 kB
JavaScript
// @generated by Peggy 4.2.0.
//
// https://peggyjs.org/
function rootNode(comment) {
return comment !== null ? { comment, variations: [] } : { variations: []}
}
function node(move, suffix, nag, comment, variations) {
const node = { move, variations }
if (suffix) {
node.suffix = suffix
}
if (nag) {
node.nag = nag
}
if (comment !== null) {
node.comment = comment
}
return node
}
function lineToTree(...nodes) {
const [root, ...rest] = nodes;
let parent = root
for (const child of rest) {
if (child !== null) {
parent.variations = [child, ...child.variations]
child.variations = []
parent = child
}
}
return root
}
function pgn(headers, game) {
if (game.marker && game.marker.comment) {
let node = game.root
while (true) {
const next = node.variations[0]
if (!next) {
node.comment = game.marker.comment
break
}
node = next
}
}
return {
headers,
root: game.root,
result: (game.marker && game.marker.result) ?? undefined
}
}
function peg$subclass(child, parent) {
function C() { this.constructor = child; }
C.prototype = parent.prototype;
child.prototype = new C();
}
function peg$SyntaxError(message, expected, found, location) {
var self = Error.call(this, message);
// istanbul ignore next Check is a necessary evil to support older environments
if (Object.setPrototypeOf) {
Object.setPrototypeOf(self, peg$SyntaxError.prototype);
}
self.expected = expected;
self.found = found;
self.location = location;
self.name = "SyntaxError";
return self;
}
peg$subclass(peg$SyntaxError, Error);
function peg$padEnd(str, targetLength, padString) {
padString = padString || " ";
if (str.length > targetLength) { return str; }
targetLength -= str.length;
padString += padString.repeat(targetLength);
return str + padString.slice(0, targetLength);
}
peg$SyntaxError.prototype.format = function(sources) {
var str = "Error: " + this.message;
if (this.location) {
var src = null;
var k;
for (k = 0; k < sources.length; k++) {
if (sources[k].source === this.location.source) {
src = sources[k].text.split(/\r\n|\n|\r/g);
break;
}
}
var s = this.location.start;
var offset_s = (this.location.source && (typeof this.location.source.offset === "function"))
? this.location.source.offset(s)
: s;
var loc = this.location.source + ":" + offset_s.line + ":" + offset_s.column;
if (src) {
var e = this.location.end;
var filler = peg$padEnd("", offset_s.line.toString().length, ' ');
var line = src[s.line - 1];
var last = s.line === e.line ? e.column : line.length + 1;
var hatLen = (last - s.column) || 1;
str += "\n --> " + loc + "\n"
+ filler + " |\n"
+ offset_s.line + " | " + line + "\n"
+ filler + " | " + peg$padEnd("", s.column - 1, ' ')
+ peg$padEnd("", hatLen, "^");
} else {
str += "\n at " + loc;
}
}
return str;
};
peg$SyntaxError.buildMessage = function(expected, found) {
var DESCRIBE_EXPECTATION_FNS = {
literal: function(expectation) {
return "\"" + literalEscape(expectation.text) + "\"";
},
class: function(expectation) {
var escapedParts = expectation.parts.map(function(part) {
return Array.isArray(part)
? classEscape(part[0]) + "-" + classEscape(part[1])
: classEscape(part);
});
return "[" + (expectation.inverted ? "^" : "") + escapedParts.join("") + "]";
},
any: function() {
return "any character";
},
end: function() {
return "end of input";
},
other: function(expectation) {
return expectation.description;
}
};
function hex(ch) {
return ch.charCodeAt(0).toString(16).toUpperCase();
}
function literalEscape(s) {
return s
.replace(/\\/g, "\\\\")
.replace(/"/g, "\\\"")
.replace(/\0/g, "\\0")
.replace(/\t/g, "\\t")
.replace(/\n/g, "\\n")
.replace(/\r/g, "\\r")
.replace(/[\x00-\x0F]/g, function(ch) { return "\\x0" + hex(ch); })
.replace(/[\x10-\x1F\x7F-\x9F]/g, function(ch) { return "\\x" + hex(ch); });
}
function classEscape(s) {
return s
.replace(/\\/g, "\\\\")
.replace(/\]/g, "\\]")
.replace(/\^/g, "\\^")
.replace(/-/g, "\\-")
.replace(/\0/g, "\\0")
.replace(/\t/g, "\\t")
.replace(/\n/g, "\\n")
.replace(/\r/g, "\\r")
.replace(/[\x00-\x0F]/g, function(ch) { return "\\x0" + hex(ch); })
.replace(/[\x10-\x1F\x7F-\x9F]/g, function(ch) { return "\\x" + hex(ch); });
}
function describeExpectation(expectation) {
return DESCRIBE_EXPECTATION_FNS[expectation.type](expectation);
}
function describeExpected(expected) {
var descriptions = expected.map(describeExpectation);
var i, j;
descriptions.sort();
if (descriptions.length > 0) {
for (i = 1, j = 1; i < descriptions.length; i++) {
if (descriptions[i - 1] !== descriptions[i]) {
descriptions[j] = descriptions[i];
j++;
}
}
descriptions.length = j;
}
switch (descriptions.length) {
case 1:
return descriptions[0];
case 2:
return descriptions[0] + " or " + descriptions[1];
default:
return descriptions.slice(0, -1).join(", ")
+ ", or "
+ descriptions[descriptions.length - 1];
}
}
function describeFound(found) {
return found ? "\"" + literalEscape(found) + "\"" : "end of input";
}
return "Expected " + describeExpected(expected) + " but " + describeFound(found) + " found.";
};
function peg$parse(input, options) {
options = options !== undefined ? options : {};
var peg$FAILED = {};
var peg$source = options.grammarSource;
var peg$startRuleFunctions = { pgn: peg$parsepgn };
var peg$startRuleFunction = peg$parsepgn;
var peg$c0 = "[";
var peg$c1 = "\"";
var peg$c2 = "]";
var peg$c3 = ".";
var peg$c4 = "O-O-O";
var peg$c5 = "O-O";
var peg$c6 = "0-0-0";
var peg$c7 = "0-0";
var peg$c8 = "$";
var peg$c9 = "{";
var peg$c10 = "}";
var peg$c11 = ";";
var peg$c12 = "(";
var peg$c13 = ")";
var peg$c14 = "1-0";
var peg$c15 = "0-1";
var peg$c16 = "1/2-1/2";
var peg$c17 = "*";
var peg$r0 = /^[a-zA-Z]/;
var peg$r1 = /^[^"]/;
var peg$r2 = /^[0-9]/;
var peg$r3 = /^[.]/;
var peg$r4 = /^[a-zA-Z1-8\-=]/;
var peg$r5 = /^[+#]/;
var peg$r6 = /^[!?]/;
var peg$r7 = /^[^}]/;
var peg$r8 = /^[^\r\n]/;
var peg$r9 = /^[ \t\r\n]/;
var peg$e0 = peg$otherExpectation("tag pair");
var peg$e1 = peg$literalExpectation("[", false);
var peg$e2 = peg$literalExpectation("\"", false);
var peg$e3 = peg$literalExpectation("]", false);
var peg$e4 = peg$otherExpectation("tag name");
var peg$e5 = peg$classExpectation([["a", "z"], ["A", "Z"]], false, false);
var peg$e6 = peg$otherExpectation("tag value");
var peg$e7 = peg$classExpectation(["\""], true, false);
var peg$e8 = peg$otherExpectation("move number");
var peg$e9 = peg$classExpectation([["0", "9"]], false, false);
var peg$e10 = peg$literalExpectation(".", false);
var peg$e11 = peg$classExpectation(["."], false, false);
var peg$e12 = peg$otherExpectation("standard algebraic notation");
var peg$e13 = peg$literalExpectation("O-O-O", false);
var peg$e14 = peg$literalExpectation("O-O", false);
var peg$e15 = peg$literalExpectation("0-0-0", false);
var peg$e16 = peg$literalExpectation("0-0", false);
var peg$e17 = peg$classExpectation([["a", "z"], ["A", "Z"], ["1", "8"], "-", "="], false, false);
var peg$e18 = peg$classExpectation(["+", "#"], false, false);
var peg$e19 = peg$otherExpectation("suffix annotation");
var peg$e20 = peg$classExpectation(["!", "?"], false, false);
var peg$e21 = peg$otherExpectation("NAG");
var peg$e22 = peg$literalExpectation("$", false);
var peg$e23 = peg$otherExpectation("brace comment");
var peg$e24 = peg$literalExpectation("{", false);
var peg$e25 = peg$classExpectation(["}"], true, false);
var peg$e26 = peg$literalExpectation("}", false);
var peg$e27 = peg$otherExpectation("rest of line comment");
var peg$e28 = peg$literalExpectation(";", false);
var peg$e29 = peg$classExpectation(["\r", "\n"], true, false);
var peg$e30 = peg$otherExpectation("variation");
var peg$e31 = peg$literalExpectation("(", false);
var peg$e32 = peg$literalExpectation(")", false);
var peg$e33 = peg$otherExpectation("game termination marker");
var peg$e34 = peg$literalExpectation("1-0", false);
var peg$e35 = peg$literalExpectation("0-1", false);
var peg$e36 = peg$literalExpectation("1/2-1/2", false);
var peg$e37 = peg$literalExpectation("*", false);
var peg$e38 = peg$otherExpectation("whitespace");
var peg$e39 = peg$classExpectation([" ", "\t", "\r", "\n"], false, false);
var peg$f0 = function(headers, game) { return pgn(headers, game) };
var peg$f1 = function(tagPairs) { return Object.fromEntries(tagPairs) };
var peg$f2 = function(tagName, tagValue) { return [tagName, tagValue] };
var peg$f3 = function(root, marker) { return { root, marker} };
var peg$f4 = function(comment, moves) { return lineToTree(rootNode(comment), ...moves.flat()) };
var peg$f5 = function(san, suffix, nag, comment, variations) { return node(san, suffix, nag, comment, variations) };
var peg$f6 = function(nag) { return nag };
var peg$f7 = function(comment) { return comment.replace(/[\r\n]+/g, " ") };
var peg$f8 = function(comment) { return comment.trim() };
var peg$f9 = function(line) { return line };
var peg$f10 = function(result, comment) { return { result, comment } };
var peg$currPos = options.peg$currPos | 0;
var peg$savedPos = peg$currPos;
var peg$posDetailsCache = [{ line: 1, column: 1 }];
var peg$maxFailPos = peg$currPos;
var peg$maxFailExpected = options.peg$maxFailExpected || [];
var peg$silentFails = options.peg$silentFails | 0;
var peg$result;
if (options.startRule) {
if (!(options.startRule in peg$startRuleFunctions)) {
throw new Error("Can't start parsing from rule \"" + options.startRule + "\".");
}
peg$startRuleFunction = peg$startRuleFunctions[options.startRule];
}
function text() {
return input.substring(peg$savedPos, peg$currPos);
}
function offset() {
return peg$savedPos;
}
function range() {
return {
source: peg$source,
start: peg$savedPos,
end: peg$currPos
};
}
function location() {
return peg$computeLocation(peg$savedPos, peg$currPos);
}
function expected(description, location) {
location = location !== undefined
? location
: peg$computeLocation(peg$savedPos, peg$currPos);
throw peg$buildStructuredError(
[peg$otherExpectation(description)],
input.substring(peg$savedPos, peg$currPos),
location
);
}
function error(message, location) {
location = location !== undefined
? location
: peg$computeLocation(peg$savedPos, peg$currPos);
throw peg$buildSimpleError(message, location);
}
function peg$literalExpectation(text, ignoreCase) {
return { type: "literal", text: text, ignoreCase: ignoreCase };
}
function peg$classExpectation(parts, inverted, ignoreCase) {
return { type: "class", parts: parts, inverted: inverted, ignoreCase: ignoreCase };
}
function peg$anyExpectation() {
return { type: "any" };
}
function peg$endExpectation() {
return { type: "end" };
}
function peg$otherExpectation(description) {
return { type: "other", description: description };
}
function peg$computePosDetails(pos) {
var details = peg$posDetailsCache[pos];
var p;
if (details) {
return details;
} else {
if (pos >= peg$posDetailsCache.length) {
p = peg$posDetailsCache.length - 1;
} else {
p = pos;
while (!peg$posDetailsCache[--p]) {}
}
details = peg$posDetailsCache[p];
details = {
line: details.line,
column: details.column
};
while (p < pos) {
if (input.charCodeAt(p) === 10) {
details.line++;
details.column = 1;
} else {
details.column++;
}
p++;
}
peg$posDetailsCache[pos] = details;
return details;
}
}
function peg$computeLocation(startPos, endPos, offset) {
var startPosDetails = peg$computePosDetails(startPos);
var endPosDetails = peg$computePosDetails(endPos);
var res = {
source: peg$source,
start: {
offset: startPos,
line: startPosDetails.line,
column: startPosDetails.column
},
end: {
offset: endPos,
line: endPosDetails.line,
column: endPosDetails.column
}
};
if (offset && peg$source && (typeof peg$source.offset === "function")) {
res.start = peg$source.offset(res.start);
res.end = peg$source.offset(res.end);
}
return res;
}
function peg$fail(expected) {
if (peg$currPos < peg$maxFailPos) { return; }
if (peg$currPos > peg$maxFailPos) {
peg$maxFailPos = peg$currPos;
peg$maxFailExpected = [];
}
peg$maxFailExpected.push(expected);
}
function peg$buildSimpleError(message, location) {
return new peg$SyntaxError(message, null, null, location);
}
function peg$buildStructuredError(expected, found, location) {
return new peg$SyntaxError(
peg$SyntaxError.buildMessage(expected, found),
expected,
found,
location
);
}
function peg$parsepgn() {
var s0, s1, s2;
s0 = peg$currPos;
s1 = peg$parsetagPairSection();
s2 = peg$parsemoveTextSection();
peg$savedPos = s0;
s0 = peg$f0(s1, s2);
return s0;
}
function peg$parsetagPairSection() {
var s0, s1, s2;
s0 = peg$currPos;
s1 = [];
s2 = peg$parsetagPair();
while (s2 !== peg$FAILED) {
s1.push(s2);
s2 = peg$parsetagPair();
}
s2 = peg$parse_();
peg$savedPos = s0;
s0 = peg$f1(s1);
return s0;
}
function peg$parsetagPair() {
var s0, s1, s2, s3, s4, s5, s6, s7, s8, s9, s10;
peg$silentFails++;
s0 = peg$currPos;
s1 = peg$parse_();
if (input.charCodeAt(peg$currPos) === 91) {
s2 = peg$c0;
peg$currPos++;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e1); }
}
if (s2 !== peg$FAILED) {
s3 = peg$parse_();
s4 = peg$parsetagName();
if (s4 !== peg$FAILED) {
s5 = peg$parse_();
if (input.charCodeAt(peg$currPos) === 34) {
s6 = peg$c1;
peg$currPos++;
} else {
s6 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e2); }
}
if (s6 !== peg$FAILED) {
s7 = peg$parsetagValue();
if (input.charCodeAt(peg$currPos) === 34) {
s8 = peg$c1;
peg$currPos++;
} else {
s8 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e2); }
}
if (s8 !== peg$FAILED) {
s9 = peg$parse_();
if (input.charCodeAt(peg$currPos) === 93) {
s10 = peg$c2;
peg$currPos++;
} else {
s10 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e3); }
}
if (s10 !== peg$FAILED) {
peg$savedPos = s0;
s0 = peg$f2(s4, s7);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
peg$silentFails--;
if (s0 === peg$FAILED) {
s1 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e0); }
}
return s0;
}
function peg$parsetagName() {
var s0, s1, s2;
peg$silentFails++;
s0 = peg$currPos;
s1 = [];
s2 = input.charAt(peg$currPos);
if (peg$r0.test(s2)) {
peg$currPos++;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e5); }
}
if (s2 !== peg$FAILED) {
while (s2 !== peg$FAILED) {
s1.push(s2);
s2 = input.charAt(peg$currPos);
if (peg$r0.test(s2)) {
peg$currPos++;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e5); }
}
}
} else {
s1 = peg$FAILED;
}
if (s1 !== peg$FAILED) {
s0 = input.substring(s0, peg$currPos);
} else {
s0 = s1;
}
peg$silentFails--;
if (s0 === peg$FAILED) {
s1 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e4); }
}
return s0;
}
function peg$parsetagValue() {
var s0, s1, s2;
peg$silentFails++;
s0 = peg$currPos;
s1 = [];
s2 = input.charAt(peg$currPos);
if (peg$r1.test(s2)) {
peg$currPos++;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e7); }
}
while (s2 !== peg$FAILED) {
s1.push(s2);
s2 = input.charAt(peg$currPos);
if (peg$r1.test(s2)) {
peg$currPos++;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e7); }
}
}
s0 = input.substring(s0, peg$currPos);
peg$silentFails--;
s1 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e6); }
return s0;
}
function peg$parsemoveTextSection() {
var s0, s1, s2, s3, s4;
s0 = peg$currPos;
s1 = peg$parseline();
s2 = peg$parse_();
s3 = peg$parsegameTerminationMarker();
if (s3 === peg$FAILED) {
s3 = null;
}
s4 = peg$parse_();
peg$savedPos = s0;
s0 = peg$f3(s1, s3);
return s0;
}
function peg$parseline() {
var s0, s1, s2, s3;
s0 = peg$currPos;
s1 = peg$parsecomment();
if (s1 === peg$FAILED) {
s1 = null;
}
s2 = [];
s3 = peg$parsemove();
while (s3 !== peg$FAILED) {
s2.push(s3);
s3 = peg$parsemove();
}
peg$savedPos = s0;
s0 = peg$f4(s1, s2);
return s0;
}
function peg$parsemove() {
var s0, s1, s2, s3, s4, s5, s6, s7, s8, s9, s10;
s0 = peg$currPos;
s1 = peg$parse_();
s2 = peg$parsemoveNumber();
if (s2 === peg$FAILED) {
s2 = null;
}
s3 = peg$parse_();
s4 = peg$parsesan();
if (s4 !== peg$FAILED) {
s5 = peg$parsesuffixAnnotation();
if (s5 === peg$FAILED) {
s5 = null;
}
s6 = [];
s7 = peg$parsenag();
while (s7 !== peg$FAILED) {
s6.push(s7);
s7 = peg$parsenag();
}
s7 = peg$parse_();
s8 = peg$parsecomment();
if (s8 === peg$FAILED) {
s8 = null;
}
s9 = [];
s10 = peg$parsevariation();
while (s10 !== peg$FAILED) {
s9.push(s10);
s10 = peg$parsevariation();
}
peg$savedPos = s0;
s0 = peg$f5(s4, s5, s6, s8, s9);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
return s0;
}
function peg$parsemoveNumber() {
var s0, s1, s2, s3, s4, s5;
peg$silentFails++;
s0 = peg$currPos;
s1 = [];
s2 = input.charAt(peg$currPos);
if (peg$r2.test(s2)) {
peg$currPos++;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e9); }
}
while (s2 !== peg$FAILED) {
s1.push(s2);
s2 = input.charAt(peg$currPos);
if (peg$r2.test(s2)) {
peg$currPos++;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e9); }
}
}
if (input.charCodeAt(peg$currPos) === 46) {
s2 = peg$c3;
peg$currPos++;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e10); }
}
if (s2 !== peg$FAILED) {
s3 = peg$parse_();
s4 = [];
s5 = input.charAt(peg$currPos);
if (peg$r3.test(s5)) {
peg$currPos++;
} else {
s5 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e11); }
}
while (s5 !== peg$FAILED) {
s4.push(s5);
s5 = input.charAt(peg$currPos);
if (peg$r3.test(s5)) {
peg$currPos++;
} else {
s5 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e11); }
}
}
s1 = [s1, s2, s3, s4];
s0 = s1;
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
peg$silentFails--;
if (s0 === peg$FAILED) {
s1 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e8); }
}
return s0;
}
function peg$parsesan() {
var s0, s1, s2, s3, s4, s5;
peg$silentFails++;
s0 = peg$currPos;
s1 = peg$currPos;
if (input.substr(peg$currPos, 5) === peg$c4) {
s2 = peg$c4;
peg$currPos += 5;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e13); }
}
if (s2 === peg$FAILED) {
if (input.substr(peg$currPos, 3) === peg$c5) {
s2 = peg$c5;
peg$currPos += 3;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e14); }
}
if (s2 === peg$FAILED) {
if (input.substr(peg$currPos, 5) === peg$c6) {
s2 = peg$c6;
peg$currPos += 5;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e15); }
}
if (s2 === peg$FAILED) {
if (input.substr(peg$currPos, 3) === peg$c7) {
s2 = peg$c7;
peg$currPos += 3;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e16); }
}
if (s2 === peg$FAILED) {
s2 = peg$currPos;
s3 = input.charAt(peg$currPos);
if (peg$r0.test(s3)) {
peg$currPos++;
} else {
s3 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e5); }
}
if (s3 !== peg$FAILED) {
s4 = [];
s5 = input.charAt(peg$currPos);
if (peg$r4.test(s5)) {
peg$currPos++;
} else {
s5 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e17); }
}
if (s5 !== peg$FAILED) {
while (s5 !== peg$FAILED) {
s4.push(s5);
s5 = input.charAt(peg$currPos);
if (peg$r4.test(s5)) {
peg$currPos++;
} else {
s5 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e17); }
}
}
} else {
s4 = peg$FAILED;
}
if (s4 !== peg$FAILED) {
s3 = [s3, s4];
s2 = s3;
} else {
peg$currPos = s2;
s2 = peg$FAILED;
}
} else {
peg$currPos = s2;
s2 = peg$FAILED;
}
}
}
}
}
if (s2 !== peg$FAILED) {
s3 = input.charAt(peg$currPos);
if (peg$r5.test(s3)) {
peg$currPos++;
} else {
s3 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e18); }
}
if (s3 === peg$FAILED) {
s3 = null;
}
s2 = [s2, s3];
s1 = s2;
} else {
peg$currPos = s1;
s1 = peg$FAILED;
}
if (s1 !== peg$FAILED) {
s0 = input.substring(s0, peg$currPos);
} else {
s0 = s1;
}
peg$silentFails--;
if (s0 === peg$FAILED) {
s1 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e12); }
}
return s0;
}
function peg$parsesuffixAnnotation() {
var s0, s1, s2;
peg$silentFails++;
s0 = peg$currPos;
s1 = [];
s2 = input.charAt(peg$currPos);
if (peg$r6.test(s2)) {
peg$currPos++;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e20); }
}
while (s2 !== peg$FAILED) {
s1.push(s2);
if (s1.length >= 2) {
s2 = peg$FAILED;
} else {
s2 = input.charAt(peg$currPos);
if (peg$r6.test(s2)) {
peg$currPos++;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e20); }
}
}
}
if (s1.length < 1) {
peg$currPos = s0;
s0 = peg$FAILED;
} else {
s0 = s1;
}
peg$silentFails--;
if (s0 === peg$FAILED) {
s1 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e19); }
}
return s0;
}
function peg$parsenag() {
var s0, s1, s2, s3, s4, s5;
peg$silentFails++;
s0 = peg$currPos;
s1 = peg$parse_();
if (input.charCodeAt(peg$currPos) === 36) {
s2 = peg$c8;
peg$currPos++;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e22); }
}
if (s2 !== peg$FAILED) {
s3 = peg$currPos;
s4 = [];
s5 = input.charAt(peg$currPos);
if (peg$r2.test(s5)) {
peg$currPos++;
} else {
s5 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e9); }
}
if (s5 !== peg$FAILED) {
while (s5 !== peg$FAILED) {
s4.push(s5);
s5 = input.charAt(peg$currPos);
if (peg$r2.test(s5)) {
peg$currPos++;
} else {
s5 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e9); }
}
}
} else {
s4 = peg$FAILED;
}
if (s4 !== peg$FAILED) {
s3 = input.substring(s3, peg$currPos);
} else {
s3 = s4;
}
if (s3 !== peg$FAILED) {
peg$savedPos = s0;
s0 = peg$f6(s3);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
peg$silentFails--;
if (s0 === peg$FAILED) {
s1 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e21); }
}
return s0;
}
function peg$parsecomment() {
var s0;
s0 = peg$parsebraceComment();
if (s0 === peg$FAILED) {
s0 = peg$parserestOfLineComment();
}
return s0;
}
function peg$parsebraceComment() {
var s0, s1, s2, s3, s4;
peg$silentFails++;
s0 = peg$currPos;
if (input.charCodeAt(peg$currPos) === 123) {
s1 = peg$c9;
peg$currPos++;
} else {
s1 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e24); }
}
if (s1 !== peg$FAILED) {
s2 = peg$currPos;
s3 = [];
s4 = input.charAt(peg$currPos);
if (peg$r7.test(s4)) {
peg$currPos++;
} else {
s4 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e25); }
}
while (s4 !== peg$FAILED) {
s3.push(s4);
s4 = input.charAt(peg$currPos);
if (peg$r7.test(s4)) {
peg$currPos++;
} else {
s4 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e25); }
}
}
s2 = input.substring(s2, peg$currPos);
if (input.charCodeAt(peg$currPos) === 125) {
s3 = peg$c10;
peg$currPos++;
} else {
s3 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e26); }
}
if (s3 !== peg$FAILED) {
peg$savedPos = s0;
s0 = peg$f7(s2);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
peg$silentFails--;
if (s0 === peg$FAILED) {
s1 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e23); }
}
return s0;
}
function peg$parserestOfLineComment() {
var s0, s1, s2, s3, s4;
peg$silentFails++;
s0 = peg$currPos;
if (input.charCodeAt(peg$currPos) === 59) {
s1 = peg$c11;
peg$currPos++;
} else {
s1 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e28); }
}
if (s1 !== peg$FAILED) {
s2 = peg$currPos;
s3 = [];
s4 = input.charAt(peg$currPos);
if (peg$r8.test(s4)) {
peg$currPos++;
} else {
s4 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e29); }
}
while (s4 !== peg$FAILED) {
s3.push(s4);
s4 = input.charAt(peg$currPos);
if (peg$r8.test(s4)) {
peg$currPos++;
} else {
s4 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e29); }
}
}
s2 = input.substring(s2, peg$currPos);
peg$savedPos = s0;
s0 = peg$f8(s2);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
peg$silentFails--;
if (s0 === peg$FAILED) {
s1 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e27); }
}
return s0;
}
function peg$parsevariation() {
var s0, s1, s2, s3, s4, s5;
peg$silentFails++;
s0 = peg$currPos;
s1 = peg$parse_();
if (input.charCodeAt(peg$currPos) === 40) {
s2 = peg$c12;
peg$currPos++;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e31); }
}
if (s2 !== peg$FAILED) {
s3 = peg$parseline();
if (s3 !== peg$FAILED) {
s4 = peg$parse_();
if (input.charCodeAt(peg$currPos) === 41) {
s5 = peg$c13;
peg$currPos++;
} else {
s5 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e32); }
}
if (s5 !== peg$FAILED) {
peg$savedPos = s0;
s0 = peg$f9(s3);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
peg$silentFails--;
if (s0 === peg$FAILED) {
s1 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e30); }
}
return s0;
}
function peg$parsegameTerminationMarker() {
var s0, s1, s2, s3;
peg$silentFails++;
s0 = peg$currPos;
if (input.substr(peg$currPos, 3) === peg$c14) {
s1 = peg$c14;
peg$currPos += 3;
} else {
s1 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e34); }
}
if (s1 === peg$FAILED) {
if (input.substr(peg$currPos, 3) === peg$c15) {
s1 = peg$c15;
peg$currPos += 3;
} else {
s1 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e35); }
}
if (s1 === peg$FAILED) {
if (input.substr(peg$currPos, 7) === peg$c16) {
s1 = peg$c16;
peg$currPos += 7;
} else {
s1 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e36); }
}
if (s1 === peg$FAILED) {
if (input.charCodeAt(peg$currPos) === 42) {
s1 = peg$c17;
peg$currPos++;
} else {
s1 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e37); }
}
}
}
}
if (s1 !== peg$FAILED) {
s2 = peg$parse_();
s3 = peg$parsecomment();
if (s3 === peg$FAILED) {
s3 = null;
}
peg$savedPos = s0;
s0 = peg$f10(s1, s3);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
peg$silentFails--;
if (s0 === peg$FAILED) {
s1 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e33); }
}
return s0;
}
function peg$parse_() {
var s0, s1;
peg$silentFails++;
s0 = [];
s1 = input.charAt(peg$currPos);
if (peg$r9.test(s1)) {
peg$currPos++;
} else {
s1 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e39); }
}
while (s1 !== peg$FAILED) {
s0.push(s1);
s1 = input.charAt(peg$currPos);
if (peg$r9.test(s1)) {
peg$currPos++;
} else {
s1 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e39); }
}
}
peg$silentFails--;
s1 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e38); }
return s0;
}
peg$result = peg$startRuleFunction();
if (options.peg$library) {
return /** @type {any} */ ({
peg$result,
peg$currPos,
peg$FAILED,
peg$maxFailExpected,
peg$maxFailPos
});
}
if (peg$result !== peg$FAILED && peg$currPos === input.length) {
return peg$result;
} else {
if (peg$result !== peg$FAILED && peg$currPos < input.length) {
peg$fail(peg$endExpectation());
}
throw peg$buildStructuredError(
peg$maxFailExpected,
peg$maxFailPos < input.length ? input.charAt(peg$maxFailPos) : null,
peg$maxFailPos < input.length
? peg$computeLocation(peg$maxFailPos, peg$maxFailPos + 1)
: peg$computeLocation(peg$maxFailPos, peg$maxFailPos)
);
}
}
const peg$allowedStartRules = [
"pgn"
];
export {
peg$allowedStartRules as StartRules,
peg$SyntaxError as SyntaxError,
peg$parse as parse
};