peggy
Version:
Parser generator for JavaScript
1,966 lines (1,805 loc) • 106 kB
JavaScript
// @generated by Peggy 5.0.6.
//
// https://peggyjs.org/
"use strict";
const OPS_TO_PREFIXED_TYPES = {
"$": "text",
"&": "simple_and",
"!": "simple_not",
};
const OPS_TO_SUFFIXED_TYPES = {
"?": "optional",
"*": "zero_or_more",
"+": "one_or_more",
};
const OPS_TO_SEMANTIC_PREDICATE_TYPES = {
"&": "semantic_and",
"!": "semantic_not",
};
class peg$SyntaxError extends SyntaxError {
constructor(message, expected, found, location) {
super(message);
this.expected = expected;
this.found = found;
this.location = location;
this.name = "SyntaxError";
}
format(sources) {
let str = "Error: " + this.message;
if (this.location) {
let src = null;
const st = sources.find(s => s.source === this.location.source);
if (st) {
src = st.text.split(/\r\n|\n|\r/g);
}
const s = this.location.start;
const offset_s = (this.location.source && (typeof this.location.source.offset === "function"))
? this.location.source.offset(s)
: s;
const loc = this.location.source + ":" + offset_s.line + ":" + offset_s.column;
if (src) {
const e = this.location.end;
const filler = "".padEnd(offset_s.line.toString().length, " ");
const line = src[s.line - 1];
const last = s.line === e.line ? e.column : line.length + 1;
const hatLen = (last - s.column) || 1;
str += "\n --> " + loc + "\n"
+ filler + " |\n"
+ offset_s.line + " | " + line + "\n"
+ filler + " | " + "".padEnd(s.column - 1, " ")
+ "".padEnd(hatLen, "^");
} else {
str += "\n at " + loc;
}
}
return str;
}
static buildMessage(expected, found) {
function hex(ch) {
return ch.codePointAt(0).toString(16).toUpperCase();
}
const nonPrintable = Object.prototype.hasOwnProperty.call(RegExp.prototype, "unicode")
? new RegExp("[\\p{C}\\p{Mn}\\p{Mc}]", "gu")
: null;
function unicodeEscape(s) {
if (nonPrintable) {
return s.replace(nonPrintable, ch => "\\u{" + hex(ch) + "}");
}
return s;
}
function literalEscape(s) {
return unicodeEscape(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, ch => "\\x0" + hex(ch))
.replace(/[\x10-\x1F\x7F-\x9F]/g, ch => "\\x" + hex(ch)));
}
function classEscape(s) {
return unicodeEscape(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, ch => "\\x0" + hex(ch))
.replace(/[\x10-\x1F\x7F-\x9F]/g, ch => "\\x" + hex(ch)));
}
const DESCRIBE_EXPECTATION_FNS = {
literal(expectation) {
return "\"" + literalEscape(expectation.text) + "\"";
},
class(expectation) {
const escapedParts = expectation.parts.map(
part => (Array.isArray(part)
? classEscape(part[0]) + "-" + classEscape(part[1])
: classEscape(part))
);
return "[" + (expectation.inverted ? "^" : "") + escapedParts.join("") + "]" + (expectation.unicode ? "u" : "");
},
any() {
return "any character";
},
end() {
return "end of input";
},
other(expectation) {
return expectation.description;
},
};
function describeExpectation(expectation) {
return DESCRIBE_EXPECTATION_FNS[expectation.type](expectation);
}
function describeExpected(expected) {
const descriptions = expected.map(describeExpectation);
descriptions.sort();
if (descriptions.length > 0) {
let j = 1;
for (let i = 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$parse(input, options) {
options = options !== undefined ? options : {};
const peg$FAILED = {};
const peg$source = options.grammarSource;
const peg$startRuleFunctions = {
Grammar: peg$parseGrammar,
ImportsAndSource: peg$parseImportsAndSource,
};
let peg$startRuleFunction = peg$parseGrammar;
const peg$c0 = "import";
const peg$c1 = ";";
const peg$c2 = ",";
const peg$c3 = "*";
const peg$c4 = "as";
const peg$c5 = "{";
const peg$c6 = "}";
const peg$c7 = "from";
const peg$c8 = "=";
const peg$c9 = "/";
const peg$c10 = "@";
const peg$c11 = ":";
const peg$c12 = "|";
const peg$c13 = "..";
const peg$c14 = "(";
const peg$c15 = ")";
const peg$c16 = ".";
const peg$c17 = "\n";
const peg$c18 = "\r\n";
const peg$c19 = "/*";
const peg$c20 = "*/";
const peg$c21 = "//";
const peg$c22 = "\\";
const peg$c23 = "i";
const peg$c24 = "\"";
const peg$c25 = "'";
const peg$c26 = "[";
const peg$c27 = "^";
const peg$c28 = "]";
const peg$c29 = "p";
const peg$c30 = "_";
const peg$c31 = "u";
const peg$c32 = "-";
const peg$c33 = "0";
const peg$c34 = "b";
const peg$c35 = "f";
const peg$c36 = "n";
const peg$c37 = "r";
const peg$c38 = "t";
const peg$c39 = "v";
const peg$c40 = "x";
const peg$r0 = /^[!$&]/;
const peg$r1 = /^[*-+?]/;
const peg$r2 = /^[!&]/;
const peg$r3 = /^[\0-\uD7FF\uE000-\uFFFF]/;
const peg$r4 = /^[\uD800-\uDBFF]/;
const peg$r5 = /^[\uDC00-\uDFFF]/;
const peg$r6 = /^[\uD800-\uDFFF]/;
const peg$r7 = /^[\t\v-\f \p{Zs}\xA0\uFEFF]/u;
const peg$r8 = /^[\n\r\u2028\u2029]/;
const peg$r9 = /^[\r\u2028-\u2029]/;
const peg$r10 = /^[\p{ID_Start}_]/u;
const peg$r11 = /^[$\p{ID_Continue}]/u;
const peg$r12 = /^[\n\r"\\\u2028-\u2029]/;
const peg$r13 = /^[\n\r'\\\u2028-\u2029]/;
const peg$r14 = /^[a-z]/i;
const peg$r15 = /^[\n\r\\-\]\u2028-\u2029]/;
const peg$r16 = /^["'\\]/;
const peg$r17 = /^[0-9pux]/;
const peg$r18 = /^[0-9]/;
const peg$r19 = /^[0-9a-f]/i;
const peg$r20 = /^[{}]/;
const peg$e0 = peg$anyExpectation();
const peg$e1 = peg$literalExpectation("import", false);
const peg$e2 = peg$literalExpectation(";", false);
const peg$e3 = peg$literalExpectation(",", false);
const peg$e4 = peg$literalExpectation("*", false);
const peg$e5 = peg$literalExpectation("as", false);
const peg$e6 = peg$literalExpectation("{", false);
const peg$e7 = peg$literalExpectation("}", false);
const peg$e8 = peg$literalExpectation("from", false);
const peg$e9 = peg$literalExpectation("=", false);
const peg$e10 = peg$literalExpectation("/", false);
const peg$e11 = peg$literalExpectation("@", false);
const peg$e12 = peg$literalExpectation(":", false);
const peg$e13 = peg$classExpectation(["!", "$", "&"], false, false, false);
const peg$e14 = peg$classExpectation([["*", "+"], "?"], false, false, false);
const peg$e15 = peg$literalExpectation("|", false);
const peg$e16 = peg$literalExpectation("..", false);
const peg$e17 = peg$literalExpectation("(", false);
const peg$e18 = peg$literalExpectation(")", false);
const peg$e19 = peg$literalExpectation(".", false);
const peg$e20 = peg$classExpectation(["!", "&"], false, false, false);
const peg$e21 = peg$classExpectation([["\0", "\uD7FF"], ["\uE000", "\uFFFF"]], false, false, false);
const peg$e22 = peg$classExpectation([["\uD800", "\uDBFF"]], false, false, false);
const peg$e23 = peg$classExpectation([["\uDC00", "\uDFFF"]], false, false, false);
const peg$e24 = peg$classExpectation([["\uD800", "\uDFFF"]], false, false, false);
const peg$e25 = peg$otherExpectation("whitespace");
const peg$e26 = peg$classExpectation(["\t", ["\v", "\f"], " ", "\\p{Zs}", "\xA0", "\uFEFF"], false, false, true);
const peg$e27 = peg$classExpectation(["\n", "\r", "\u2028", "\u2029"], false, false, false);
const peg$e28 = peg$otherExpectation("end of line");
const peg$e29 = peg$literalExpectation("\n", false);
const peg$e30 = peg$literalExpectation("\r\n", false);
const peg$e31 = peg$classExpectation(["\r", ["\u2028", "\u2029"]], false, false, false);
const peg$e32 = peg$otherExpectation("comment");
const peg$e33 = peg$literalExpectation("/*", false);
const peg$e34 = peg$literalExpectation("*/", false);
const peg$e35 = peg$literalExpectation("//", false);
const peg$e36 = peg$otherExpectation("identifier");
const peg$e37 = peg$classExpectation(["\\p{ID_Start}", "_"], false, false, true);
const peg$e38 = peg$literalExpectation("\\", false);
const peg$e39 = peg$classExpectation(["$", "\\p{ID_Continue}"], false, false, true);
const peg$e40 = peg$otherExpectation("literal");
const peg$e41 = peg$literalExpectation("i", false);
const peg$e42 = peg$otherExpectation("string");
const peg$e43 = peg$literalExpectation("\"", false);
const peg$e44 = peg$literalExpectation("'", false);
const peg$e45 = peg$classExpectation(["\n", "\r", "\"", "\\", ["\u2028", "\u2029"]], false, false, false);
const peg$e46 = peg$classExpectation(["\n", "\r", "'", "\\", ["\u2028", "\u2029"]], false, false, false);
const peg$e47 = peg$otherExpectation("character class");
const peg$e48 = peg$literalExpectation("[", false);
const peg$e49 = peg$literalExpectation("^", false);
const peg$e50 = peg$literalExpectation("]", false);
const peg$e51 = peg$literalExpectation("p", true);
const peg$e52 = peg$literalExpectation("_", false);
const peg$e53 = peg$classExpectation([["a", "z"]], false, true, false);
const peg$e54 = peg$literalExpectation("u", false);
const peg$e55 = peg$literalExpectation("-", false);
const peg$e56 = peg$classExpectation(["\n", "\r", ["\\", "]"], ["\u2028", "\u2029"]], false, false, false);
const peg$e57 = peg$literalExpectation("0", false);
const peg$e58 = peg$classExpectation(["\"", "'", "\\"], false, false, false);
const peg$e59 = peg$literalExpectation("b", false);
const peg$e60 = peg$literalExpectation("f", false);
const peg$e61 = peg$literalExpectation("n", false);
const peg$e62 = peg$literalExpectation("r", false);
const peg$e63 = peg$literalExpectation("t", false);
const peg$e64 = peg$literalExpectation("v", false);
const peg$e65 = peg$classExpectation([["0", "9"], "p", "u", "x"], false, false, false);
const peg$e66 = peg$literalExpectation("x", false);
const peg$e67 = peg$classExpectation([["0", "9"]], false, false, false);
const peg$e68 = peg$classExpectation([["0", "9"], ["a", "f"]], false, true, false);
const peg$e69 = peg$otherExpectation("code block");
const peg$e70 = peg$classExpectation(["{", "}"], false, false, false);
function peg$f0(imports, topLevelInitializer, initializer, rules) {
return {
type: "grammar",
imports,
topLevelInitializer,
initializer,
rules,
location: location(),
};
}
function peg$f1(imports, body) {
return [imports, body];
}
function peg$f2(code) {
return {
type: "top_level_initializer",
code,
codeLocation: location(),
};
}
function peg$f3(code) {
return {
type: "top_level_initializer",
code,
codeLocation: location(),
};
}
function peg$f4(what, from) {
return {
type: "grammar_import", what, from, location: location(),
};
}
function peg$f5(from) {
return {
type: "grammar_import", what: [], from, location: location(),
};
}
function peg$f6(first, others) {
if (!others) {
return [first];
}
// 'others' is always an array.
others.unshift(first);
return others;
}
function peg$f7(binding) {
return {
type: "import_binding_default",
binding: binding[0],
location: binding[1],
};
}
function peg$f8(binding) {
return [{
type: "import_binding_all",
binding: binding[0],
location: binding[1],
}];
}
function peg$f9() { return []; }
function peg$f10(rename, binding) {
return {
type: "import_binding_rename",
rename: rename[0],
renameLocation: rename[1],
binding: binding[0],
location: binding[1],
};
}
function peg$f11(binding) {
return {
type: "import_binding",
binding: binding[0],
location: binding[1],
};
}
function peg$f12(module) {
return { type: "import_module_specifier", module, location: location() };
}
function peg$f13(id) { return [id, location()]; }
function peg$f14(id) { return [id, location()]; }
function peg$f15(id) {
if (reservedWords.has(id[0])) {
error(`Binding identifier can't be a reserved word "${id[0]}"`, id[1]);
}
return id[0];
}
function peg$f16(code) {
return {
type: "top_level_initializer",
code: code[0],
codeLocation: code[1],
location: location(),
};
}
function peg$f17(code) {
return {
type: "initializer",
code: code[0],
codeLocation: code[1],
location: location(),
};
}
function peg$f18(name, displayName, expression) {
return {
type: "rule",
name: name[0],
nameLocation: name[1],
expression: displayName !== null
? {
type: "named",
name: displayName,
expression,
location: location(),
}
: expression,
location: location(),
};
}
function peg$f19(head, tail) {
return tail.length > 0
? {
type: "choice",
alternatives: [head].concat(tail),
location: location(),
}
: head;
}
function peg$f20(expression, code) {
return code !== null
? {
type: "action",
expression,
code: code[0],
codeLocation: code[1],
location: location(),
}
: expression;
}
function peg$f21(head, tail) {
return ((tail.length > 0) || (head.type === "labeled" && head.pick))
? {
type: "sequence",
elements: [head].concat(tail),
location: location(),
}
: head;
}
function peg$f22(pluck, label, expression) {
if (expression.type.startsWith("semantic_")) {
error("\"@\" cannot be used on a semantic predicate", pluck);
}
return {
type: "labeled",
label: label !== null ? label[0] : null,
// Use location of "@" if label is unavailable
labelLocation: label !== null ? label[1] : pluck,
pick: true,
expression,
location: location(),
};
}
function peg$f23(label, expression) {
return {
type: "labeled",
label: label[0],
labelLocation: label[1],
expression,
location: location(),
};
}
function peg$f24() { return location(); }
function peg$f25(label) {
if (reservedWords.has(label[0])) {
error(`Label can't be a reserved word "${label[0]}"`, label[1]);
}
return label;
}
function peg$f26(operator, expression) {
return {
type: OPS_TO_PREFIXED_TYPES[operator],
expression,
location: location(),
};
}
function peg$f27(expression, operator) {
return {
type: OPS_TO_SUFFIXED_TYPES[operator],
expression,
location: location(),
};
}
function peg$f28(expression, boundaries, delimiter) {
const min = boundaries[0];
const max = boundaries[1];
if (max.type === "constant" && max.value === 0) {
error("The maximum count of repetitions of the rule must be > 0", max.location);
}
return {
type: "repeated",
min,
max,
expression,
delimiter,
location: location(),
};
}
function peg$f29(min, max) {
return [
min !== null ? min : { type: "constant", value: 0 },
max !== null ? max : { type: "constant", value: null },
];
}
function peg$f30(exact) { return [null, exact]; }
function peg$f31(value) { return { type: "constant", value, location: location() }; }
function peg$f32(value) { return { type: "variable", value: value[0], location: location() }; }
function peg$f33(value) {
return {
type: "function",
value: value[0],
codeLocation: value[1],
location: location(),
};
}
function peg$f34(expression) {
// The purpose of the "group" AST node is just to isolate label scope. We
// don't need to put it around nodes that can't contain any labels or
// nodes that already isolate label scope themselves. This leaves us with
// "labeled" and "sequence".
return expression.type === "labeled" || expression.type === "sequence"
? { type: "group", expression, location: location() }
: expression;
}
function peg$f35(library, name) {
return {
type: "library_ref",
name: name[0],
library: library[0],
libraryNumber: -1,
location: location(),
};
}
function peg$f36(name) {
return { type: "rule_ref", name: name[0], location: location() };
}
function peg$f37(operator, code) {
return {
type: OPS_TO_SEMANTIC_PREDICATE_TYPES[operator],
code: code[0],
codeLocation: code[1],
location: location(),
};
}
function peg$f38(head, tail) {
return [head + tail.join(""), location()];
}
function peg$f39(value, ignoreCase) {
return {
type: "literal",
value,
ignoreCase: ignoreCase !== null,
location: location(),
};
}
function peg$f40(chars) { return chars.join(""); }
function peg$f41(chars) { return chars.join(""); }
function peg$f42(inverted, parts, flags) {
// [^]u is like . but for a codepoint: not-nothing.
if (inverted && (parts.length === 0)) {
if (flags.unicode) {
parts = [["\ud800", "\udfff"]];
} else {
return {
type: "any",
location: location(),
};
}
}
return {
type: "class",
parts: parts.filter(part => part !== ""),
inverted: Boolean(inverted),
ignoreCase: Boolean(flags.ignoreCase),
location: location(),
unicode: Boolean(flags.unicode) || parts.flat().some(
c => ((typeof c === "object") && c.unicode) || (c.codePointAt(0) > 0xffff)
),
};
}
function peg$f43(value) {
try {
new RegExp(`[\\${value}]`, "u");
} catch (er) {
error("Invalid Unicode property escape");
}
return {
type: "classEscape",
value,
unicode: true,
location: location(),
};
}
function peg$f44(flags) {
const ret = Object.fromEntries(flags);
if (Object.keys(ret).length !== flags.length) {
error("Invalid flags");
}
return ret;
}
function peg$f45() { return ["ignoreCase", true]; }
function peg$f46() { return ["unicode", true]; }
function peg$f47(begin, end) {
if (begin.codePointAt(0) > end.codePointAt(0)) {
error(
"Invalid character range: " + text() + "."
);
}
return [begin, end];
}
function peg$f48() { return ""; }
function peg$f49() { return "\0"; }
function peg$f50() { return "\b"; }
function peg$f51() { return "\f"; }
function peg$f52() { return "\n"; }
function peg$f53() { return "\r"; }
function peg$f54() { return "\t"; }
function peg$f55() { return "\v"; }
function peg$f56(digits) {
return String.fromCharCode(parseInt(digits, 16));
}
function peg$f57(digits) {
return String.fromCharCode(parseInt(digits, 16));
}
function peg$f58(digits) {
return String.fromCodePoint(parseInt(digits, 16));
}
function peg$f59() { return { type: "any", location: location() }; }
function peg$f60(code) { return [code, location()]; }
function peg$f61(digits) { return parseInt(digits, 10); }
let peg$currPos = options.peg$currPos | 0;
let peg$savedPos = peg$currPos;
const peg$posDetailsCache = [{ line: 1, column: 1 }];
let peg$maxFailPos = peg$currPos;
let peg$maxFailExpected = options.peg$maxFailExpected || [];
let peg$silentFails = options.peg$silentFails | 0;
let peg$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$buildSimpleError(message, location);
}
function peg$getUnicode(pos = peg$currPos) {
const cp = input.codePointAt(pos);
if (cp === undefined) {
return "";
}
return String.fromCodePoint(cp);
}
function peg$literalExpectation(text, ignoreCase) {
return { type: "literal", text, ignoreCase };
}
function peg$classExpectation(parts, inverted, ignoreCase, unicode) {
return { type: "class", parts, inverted, ignoreCase, unicode };
}
function peg$anyExpectation() {
return { type: "any" };
}
function peg$endExpectation() {
return { type: "end" };
}
function peg$otherExpectation(description) {
return { type: "other", description };
}
function peg$computePosDetails(pos) {
let details = peg$posDetailsCache[pos];
let 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) {
const startPosDetails = peg$computePosDetails(startPos);
const endPosDetails = peg$computePosDetails(endPos);
const 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$SyntaxError.buildMessage(expected, found),
expected,
found,
location
);
}
function peg$parseGrammar() {
let s0, s1, s2, s3, s4, s5, s6, s7, s8;
s0 = peg$currPos;
s1 = peg$parseImportDeclarations();
s2 = peg$currPos;
s3 = peg$parse__();
s4 = peg$parseTopLevelInitializer();
if (s4 !== peg$FAILED) {
s2 = s4;
} else {
peg$currPos = s2;
s2 = peg$FAILED;
}
if (s2 === peg$FAILED) {
s2 = null;
}
s3 = peg$currPos;
s4 = peg$parse__();
s5 = peg$parseInitializer();
if (s5 !== peg$FAILED) {
s3 = s5;
} else {
peg$currPos = s3;
s3 = peg$FAILED;
}
if (s3 === peg$FAILED) {
s3 = null;
}
s4 = peg$parse__();
s5 = [];
s6 = peg$currPos;
s7 = peg$parseRule();
if (s7 !== peg$FAILED) {
s8 = peg$parse__();
s6 = s7;
} else {
peg$currPos = s6;
s6 = peg$FAILED;
}
if (s6 !== peg$FAILED) {
while (s6 !== peg$FAILED) {
s5.push(s6);
s6 = peg$currPos;
s7 = peg$parseRule();
if (s7 !== peg$FAILED) {
s8 = peg$parse__();
s6 = s7;
} else {
peg$currPos = s6;
s6 = peg$FAILED;
}
}
} else {
s5 = peg$FAILED;
}
if (s5 !== peg$FAILED) {
peg$savedPos = s0;
s0 = peg$f0(s1, s2, s3, s5);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
return s0;
}
function peg$parseImportsAndSource() {
let s0, s1, s2;
s0 = peg$currPos;
s1 = peg$parseImportsAsText();
s2 = peg$parseGrammarBody();
peg$savedPos = s0;
s0 = peg$f1(s1, s2);
return s0;
}
function peg$parseGrammarBody() {
let s0, s1, s2, s3;
s0 = peg$currPos;
s1 = peg$currPos;
s2 = [];
if (input.length > peg$currPos) {
s3 = input.charAt(peg$currPos);
peg$currPos++;
} else {
s3 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e0); }
}
while (s3 !== peg$FAILED) {
s2.push(s3);
if (input.length > peg$currPos) {
s3 = input.charAt(peg$currPos);
peg$currPos++;
} else {
s3 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e0); }
}
}
s1 = input.substring(s1, peg$currPos);
peg$savedPos = s0;
s1 = peg$f2(s1);
s0 = s1;
return s0;
}
function peg$parseImportsAsText() {
let s0, s1, s2;
s0 = peg$currPos;
s1 = peg$currPos;
s2 = peg$parseImportDeclarations();
s1 = input.substring(s1, peg$currPos);
peg$savedPos = s0;
s1 = peg$f3(s1);
s0 = s1;
return s0;
}
function peg$parseImportDeclarations() {
let s0, s1;
s0 = [];
s1 = peg$parseImportDeclaration();
while (s1 !== peg$FAILED) {
s0.push(s1);
s1 = peg$parseImportDeclaration();
}
return s0;
}
function peg$parseImportDeclaration() {
let s0, s1, s2, s3, s4, s5, s6, s7, s8, s9;
s0 = peg$currPos;
s1 = peg$parse__();
if (input.substr(peg$currPos, 6) === peg$c0) {
s2 = peg$c0;
peg$currPos += 6;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e1); }
}
if (s2 !== peg$FAILED) {
s3 = peg$parse__();
s4 = peg$parseImportClause();
if (s4 !== peg$FAILED) {
s5 = peg$parse__();
s6 = peg$parseFromClause();
if (s6 !== peg$FAILED) {
s7 = peg$currPos;
s8 = peg$parse__();
if (input.charCodeAt(peg$currPos) === 59) {
s9 = peg$c1;
peg$currPos++;
} else {
s9 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e2); }
}
if (s9 !== peg$FAILED) {
s8 = [s8, s9];
s7 = s8;
} else {
peg$currPos = s7;
s7 = peg$FAILED;
}
if (s7 === peg$FAILED) {
s7 = null;
}
peg$savedPos = s0;
s0 = peg$f4(s4, s6);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
if (s0 === peg$FAILED) {
s0 = peg$currPos;
s1 = peg$parse__();
if (input.substr(peg$currPos, 6) === peg$c0) {
s2 = peg$c0;
peg$currPos += 6;
} else {
s2 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e1); }
}
if (s2 !== peg$FAILED) {
s3 = peg$parse__();
s4 = peg$parseModuleSpecifier();
if (s4 !== peg$FAILED) {
s5 = peg$currPos;
s6 = peg$parse__();
if (input.charCodeAt(peg$currPos) === 59) {
s7 = peg$c1;
peg$currPos++;
} else {
s7 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e2); }
}
if (s7 !== peg$FAILED) {
s6 = [s6, s7];
s5 = s6;
} else {
peg$currPos = s5;
s5 = peg$FAILED;
}
if (s5 === peg$FAILED) {
s5 = null;
}
peg$savedPos = s0;
s0 = peg$f5(s4);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
}
return s0;
}
function peg$parseImportClause() {
let s0, s1, s2, s3, s4, s5, s6;
s0 = peg$parseNameSpaceImport();
if (s0 === peg$FAILED) {
s0 = peg$parseNamedImports();
if (s0 === peg$FAILED) {
s0 = peg$currPos;
s1 = peg$parseImportedDefaultBinding();
if (s1 !== peg$FAILED) {
s2 = peg$currPos;
s3 = peg$parse__();
if (input.charCodeAt(peg$currPos) === 44) {
s4 = peg$c2;
peg$currPos++;
} else {
s4 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e3); }
}
if (s4 !== peg$FAILED) {
s5 = peg$parse__();
s6 = peg$parseNameSpaceImport();
if (s6 === peg$FAILED) {
s6 = peg$parseNamedImports();
}
if (s6 !== peg$FAILED) {
s2 = s6;
} else {
peg$currPos = s2;
s2 = peg$FAILED;
}
} else {
peg$currPos = s2;
s2 = peg$FAILED;
}
if (s2 === peg$FAILED) {
s2 = null;
}
peg$savedPos = s0;
s0 = peg$f6(s1, s2);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
}
}
return s0;
}
function peg$parseImportedDefaultBinding() {
let s0, s1;
s0 = peg$currPos;
s1 = peg$parseImportedBinding();
if (s1 !== peg$FAILED) {
peg$savedPos = s0;
s1 = peg$f7(s1);
}
s0 = s1;
return s0;
}
function peg$parseNameSpaceImport() {
let s0, s1, s2, s3, s4, s5;
s0 = peg$currPos;
if (input.charCodeAt(peg$currPos) === 42) {
s1 = peg$c3;
peg$currPos++;
} else {
s1 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e4); }
}
if (s1 !== peg$FAILED) {
s2 = peg$parse__();
if (input.substr(peg$currPos, 2) === peg$c4) {
s3 = peg$c4;
peg$currPos += 2;
} else {
s3 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e5); }
}
if (s3 !== peg$FAILED) {
s4 = peg$parse__();
s5 = peg$parseImportedBinding();
if (s5 !== peg$FAILED) {
peg$savedPos = s0;
s0 = peg$f8(s5);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
return s0;
}
function peg$parseNamedImports() {
let s0, s1, s2, s3, s4, s5, s6, s7;
s0 = peg$currPos;
if (input.charCodeAt(peg$currPos) === 123) {
s1 = peg$c5;
peg$currPos++;
} else {
s1 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e6); }
}
if (s1 !== peg$FAILED) {
s2 = peg$parse__();
if (input.charCodeAt(peg$currPos) === 125) {
s3 = peg$c6;
peg$currPos++;
} else {
s3 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e7); }
}
if (s3 !== peg$FAILED) {
peg$savedPos = s0;
s0 = peg$f9();
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
if (s0 === peg$FAILED) {
s0 = peg$currPos;
if (input.charCodeAt(peg$currPos) === 123) {
s1 = peg$c5;
peg$currPos++;
} else {
s1 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e6); }
}
if (s1 !== peg$FAILED) {
s2 = peg$parse__();
s3 = peg$parseImportsList();
if (s3 !== peg$FAILED) {
s4 = peg$parse__();
s5 = peg$currPos;
if (input.charCodeAt(peg$currPos) === 44) {
s6 = peg$c2;
peg$currPos++;
} else {
s6 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e3); }
}
if (s6 !== peg$FAILED) {
s7 = peg$parse__();
s6 = [s6, s7];
s5 = s6;
} else {
peg$currPos = s5;
s5 = peg$FAILED;
}
if (s5 === peg$FAILED) {
s5 = null;
}
if (input.charCodeAt(peg$currPos) === 125) {
s6 = peg$c6;
peg$currPos++;
} else {
s6 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e7); }
}
if (s6 !== peg$FAILED) {
s0 = s3;
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
}
return s0;
}
function peg$parseFromClause() {
let s0, s1, s2, s3;
s0 = peg$currPos;
if (input.substr(peg$currPos, 4) === peg$c7) {
s1 = peg$c7;
peg$currPos += 4;
} else {
s1 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e8); }
}
if (s1 !== peg$FAILED) {
s2 = peg$parse__();
s3 = peg$parseModuleSpecifier();
if (s3 !== peg$FAILED) {
s0 = s3;
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
return s0;
}
function peg$parseImportsList() {
let s0, s1, s2, s3, s4, s5, s6;
s0 = peg$currPos;
s1 = [];
s2 = peg$parseImportSpecifier();
while (s2 !== peg$FAILED) {
s1.push(s2);
s2 = peg$currPos;
s3 = peg$currPos;
s4 = peg$parse__();
if (input.charCodeAt(peg$currPos) === 44) {
s5 = peg$c2;
peg$currPos++;
} else {
s5 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e3); }
}
if (s5 !== peg$FAILED) {
s6 = peg$parse__();
s4 = [s4, s5, s6];
s3 = s4;
} else {
peg$currPos = s3;
s3 = peg$FAILED;
}
if (s3 !== peg$FAILED) {
s3 = peg$parseImportSpecifier();
if (s3 === peg$FAILED) {
peg$currPos = s2;
s2 = peg$FAILED;
} else {
s2 = s3;
}
} else {
s2 = s3;
}
}
if (s1.length < 1) {
peg$currPos = s0;
s0 = peg$FAILED;
} else {
s0 = s1;
}
return s0;
}
function peg$parseImportSpecifier() {
let s0, s1, s2, s3, s4, s5;
s0 = peg$currPos;
s1 = peg$parseModuleExportName();
if (s1 !== peg$FAILED) {
s2 = peg$parse__();
if (input.substr(peg$currPos, 2) === peg$c4) {
s3 = peg$c4;
peg$currPos += 2;
} else {
s3 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e5); }
}
if (s3 !== peg$FAILED) {
s4 = peg$parse__();
s5 = peg$parseImportedBinding();
if (s5 !== peg$FAILED) {
peg$savedPos = s0;
s0 = peg$f10(s1, s5);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
if (s0 === peg$FAILED) {
s0 = peg$currPos;
s1 = peg$parseImportedBinding();
if (s1 !== peg$FAILED) {
peg$savedPos = s0;
s1 = peg$f11(s1);
}
s0 = s1;
}
return s0;
}
function peg$parseModuleSpecifier() {
let s0, s1;
s0 = peg$currPos;
s1 = peg$parseStringLiteral();
if (s1 !== peg$FAILED) {
peg$savedPos = s0;
s1 = peg$f12(s1);
}
s0 = s1;
return s0;
}
function peg$parseImportedBinding() {
let s0, s1;
s0 = peg$currPos;
s1 = peg$parseBindingIdentifier();
if (s1 !== peg$FAILED) {
peg$savedPos = s0;
s1 = peg$f13(s1);
}
s0 = s1;
return s0;
}
function peg$parseModuleExportName() {
let s0, s1;
s0 = peg$parseIdentifierName();
if (s0 === peg$FAILED) {
s0 = peg$currPos;
s1 = peg$parseStringLiteral();
if (s1 !== peg$FAILED) {
peg$savedPos = s0;
s1 = peg$f14(s1);
}
s0 = s1;
}
return s0;
}
function peg$parseBindingIdentifier() {
let s0, s1;
s0 = peg$currPos;
s1 = peg$parseIdentifierName();
if (s1 !== peg$FAILED) {
peg$savedPos = s0;
s1 = peg$f15(s1);
}
s0 = s1;
return s0;
}
function peg$parseTopLevelInitializer() {
let s0, s1, s2, s3, s4;
s0 = peg$currPos;
if (input.charCodeAt(peg$currPos) === 123) {
s1 = peg$c5;
peg$currPos++;
} else {
s1 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e6); }
}
if (s1 !== peg$FAILED) {
s2 = peg$parseCodeBlock();
if (s2 !== peg$FAILED) {
if (input.charCodeAt(peg$currPos) === 125) {
s3 = peg$c6;
peg$currPos++;
} else {
s3 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e7); }
}
if (s3 !== peg$FAILED) {
s4 = peg$parseEOS();
if (s4 !== peg$FAILED) {
peg$savedPos = s0;
s0 = peg$f16(s2);
} else {
peg$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$FAILED;
}
return s0;
}
function peg$parseInitializer() {
let s0, s1, s2;
s0 = peg$currPos;
s1 = peg$parseCodeBlock();
if (s1 !== peg$FAILED) {
s2 = peg$parseEOS();
if (s2 !== peg$FAILED) {
peg$savedPos = s0;
s0 = peg$f17(s1);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
return s0;
}
function peg$parseRule() {
let s0, s1, s2, s3, s4, s5, s6, s7;
s0 = peg$currPos;
s1 = peg$parseIdentifierName();
if (s1 !== peg$FAILED) {
s2 = peg$parse__();
s3 = peg$currPos;
s4 = peg$parseStringLiteral();
if (s4 !== peg$FAILED) {
s5 = peg$parse__();
s3 = s4;
} else {
peg$currPos = s3;
s3 = peg$FAILED;
}
if (s3 === peg$FAILED) {
s3 = null;
}
if (input.charCodeAt(peg$currPos) === 61) {
s4 = peg$c8;
peg$currPos++;
} else {
s4 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e9); }
}
if (s4 !== peg$FAILED) {
s5 = peg$parse__();
s6 = peg$parseChoiceExpression();
if (s6 !== peg$FAILED) {
s7 = peg$parseEOS();
if (s7 !== peg$FAILED) {
peg$savedPos = s0;
s0 = peg$f18(s1, s3, s6);
} 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;
}
return s0;
}
function peg$parseChoiceExpression() {
let s0, s1, s2, s3, s4, s5, s6, s7;
s0 = peg$currPos;
s1 = peg$parseActionExpression();
if (s1 !== peg$FAILED) {
s2 = [];
s3 = peg$currPos;
s4 = peg$parse__();
if (input.charCodeAt(peg$currPos) === 47) {
s5 = peg$c9;
peg$currPos++;
} else {
s5 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e10); }
}
if (s5 !== peg$FAILED) {
s6 = peg$parse__();
s7 = peg$parseActionExpression();
if (s7 !== peg$FAILED) {
s3 = s7;
} else {
peg$currPos = s3;
s3 = peg$FAILED;
}
} else {
peg$currPos = s3;
s3 = peg$FAILED;
}
while (s3 !== peg$FAILED) {
s2.push(s3);
s3 = peg$currPos;
s4 = peg$parse__();
if (input.charCodeAt(peg$currPos) === 47) {
s5 = peg$c9;
peg$currPos++;
} else {
s5 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e10); }
}
if (s5 !== peg$FAILED) {
s6 = peg$parse__();
s7 = peg$parseActionExpression();
if (s7 !== peg$FAILED) {
s3 = s7;
} else {
peg$currPos = s3;
s3 = peg$FAILED;
}
} else {
peg$currPos = s3;
s3 = peg$FAILED;
}
}
peg$savedPos = s0;
s0 = peg$f19(s1, s2);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
return s0;
}
function peg$parseActionExpression() {
let s0, s1, s2, s3, s4;
s0 = peg$currPos;
s1 = peg$parseSequenceExpression();
if (s1 !== peg$FAILED) {
s2 = peg$currPos;
s3 = peg$parse__();
s4 = peg$parseCodeBlock();
if (s4 !== peg$FAILED) {
s2 = s4;
} else {
peg$currPos = s2;
s2 = peg$FAILED;
}
if (s2 === peg$FAILED) {
s2 = null;
}
peg$savedPos = s0;
s0 = peg$f20(s1, s2);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
return s0;
}
function peg$parseSequenceExpression() {
let s0, s1, s2, s3, s4, s5;
s0 = peg$currPos;
s1 = peg$parseLabeledExpression();
if (s1 !== peg$FAILED) {
s2 = [];
s3 = peg$currPos;
s4 = peg$parse__();
s5 = peg$parseLabeledExpression();
if (s5 !== peg$FAILED) {
s3 = s5;
} else {
peg$currPos = s3;
s3 = peg$FAILED;
}
while (s3 !== peg$FAILED) {
s2.push(s3);
s3 = peg$currPos;
s4 = peg$parse__();
s5 = peg$parseLabeledExpression();
if (s5 !== peg$FAILED) {
s3 = s5;
} else {
peg$currPos = s3;
s3 = peg$FAILED;
}
}
peg$savedPos = s0;
s0 = peg$f21(s1, s2);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
return s0;
}
function peg$parseLabeledExpression() {
let s0, s1, s2, s3;
s0 = peg$currPos;
s1 = peg$parsePluck();
if (s1 !== peg$FAILED) {
s2 = peg$parseLabelColon();
if (s2 === peg$FAILED) {
s2 = null;
}
s3 = peg$parsePrefixedExpression();
if (s3 !== peg$FAILED) {
peg$savedPos = s0;
s0 = peg$f22(s1, s2, s3);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
if (s0 === peg$FAILED) {
s0 = peg$currPos;
s1 = peg$parseLabelColon();
if (s1 !== peg$FAILED) {
s2 = peg$parsePrefixedExpression();
if (s2 !== peg$FAILED) {
peg$savedPos = s0;
s0 = peg$f23(s1, s2);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
if (s0 === peg$FAILED) {
s0 = peg$parsePrefixedExpression();
}
}
return s0;
}
function peg$parsePluck() {
let s0, s1;
s0 = peg$currPos;
if (input.charCodeAt(peg$currPos) === 64) {
s1 = peg$c10;
peg$currPos++;
} else {
s1 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e11); }
}
if (s1 !== peg$FAILED) {
peg$savedPos = s0;
s1 = peg$f24();
}
s0 = s1;
return s0;
}
function peg$parseLabelColon() {
let s0, s1, s2, s3, s4;
s0 = peg$currPos;
s1 = peg$parseIdentifierName();
if (s1 !== peg$FAILED) {
s2 = peg$parse__();
if (input.charCodeAt(peg$currPos) === 58) {
s3 = peg$c11;
peg$currPos++;
} else {
s3 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e12); }
}
if (s3 !== peg$FAILED) {
s4 = peg$parse__();
peg$savedPos = s0;
s0 = peg$f25(s1);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
return s0;
}
function peg$parsePrefixedExpression() {
let s0, s1, s2, s3;
s0 = peg$currPos;
s1 = peg$parsePrefixedOperator();
if (s1 !== peg$FAILED) {
s2 = peg$parse__();
s3 = peg$parseSuffixedExpression();
if (s3 !== peg$FAILED) {
peg$savedPos = s0;
s0 = peg$f26(s1, s3);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
if (s0 === peg$FAILED) {
s0 = peg$parseSuffixedExpression();
}
return s0;
}
function peg$parsePrefixedOperator() {
let s0;
s0 = input.charAt(peg$currPos);
if (peg$r0.test(s0)) {
peg$currPos++;
} else {
s0 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e13); }
}
return s0;
}
function peg$parseSuffixedExpression() {
let s0, s1, s2, s3;
s0 = peg$currPos;
s1 = peg$parsePrimaryExpression();
if (s1 !== peg$FAILED) {
s2 = peg$parse__();
s3 = peg$parseSuffixedOperator();
if (s3 !== peg$FAILED) {
peg$savedPos = s0;
s0 = peg$f27(s1, s3);
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
} else {
peg$currPos = s0;
s0 = peg$FAILED;
}
if (s0 === peg$FAILED) {
s0 = peg$parseRepeatedExpression();
if (s0 === peg$FAILED) {
s0 = peg$parsePrimaryExpression();
}
}
return s0;
}
function peg$parseSuffixedOperator() {
let s0;
s0 = input.charAt(peg$currPos);
if (peg$r1.test(s0)) {
peg$currPos++;
} else {
s0 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e14); }
}
return s0;
}
function peg$parseRepeatedExpression() {
let s0, s1, s2, s3, s4, s5, s6, s7, s8, s9, s10, s11;
s0 = peg$currPos;
s1 = peg$parsePrimaryExpression();
if (s1 !== peg$FAILED) {
s2 = peg$parse__();
if (input.charCodeAt(peg$currPos) === 124) {
s3 = peg$c12;
peg$currPos++;
} else {
s3 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e15); }
}
if (s3 !== peg$FAILED) {
s4 = peg$parse__();
s5 = peg$parseBoundaries();
if (s5 !== peg$FAILED) {
s6 = peg$parse__();
s7 = peg$currPos;
if (input.charCodeAt(peg$currPos) === 44) {
s8 = peg$c2;
peg$currPos++;
} else {
s8 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e3); }
}
if (s8 !== peg$FAILED) {
s9 = peg$parse__();
s10 = peg$parseChoiceExpression();
if (s10 !== peg$FAILED) {
s11 = peg$parse__();
s7 = s10;
} else {
peg$currPos = s7;
s7 = peg$FAILED;
}
} else {
peg$currPos = s7;
s7 = peg$FAILED;
}
if (s7 === peg$FAILED) {
s7 = null;
}
if (input.charCodeAt(peg$currPos) === 124) {
s8 = peg$c12;
peg$currPos++;
} else {
s8 = peg$FAILED;
if (peg$silentFails === 0) { peg$fail(peg$e15); }
}
if (s8 !== peg$FAILED) {
peg$savedPos = s0;
s0 = peg$f28(s1, s5, 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;
}
return s0;
}
function peg$parseBoundaries() {
let s0, s1, s2, s3, s4, s5;
s0 = peg$currPos;
s1 = peg$parseBoundary();
if (s1 === peg$FAILED) {
s1 = null;
}
s2 = peg$parse__();
if (input.substr(peg$currPos, 2) === peg$c13) {
s3 = peg$c13;
peg$currPos += 2;
} else {
s3 =