Software: Apache. PHP/8.1.30 uname -a: Linux server1.tuhinhossain.com 5.15.0-151-generic #161-Ubuntu SMP Tue Jul 22 14:25:40 UTC uid=1002(picotech) gid=1003(picotech) groups=1003(picotech),0(root) Safe-mode: OFF (not secure) /usr/share/nodejs/esprima/src/ drwxr-xr-x | |
| Viewing file: Select action/file-type: "use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Scanner = void 0;
var assert_1 = require("./assert");
var character_1 = require("./character");
var messages_1 = require("./messages");
function hexValue(ch) {
return '0123456789abcdef'.indexOf(ch.toLowerCase());
}
function octalValue(ch) {
return '01234567'.indexOf(ch);
}
var Scanner = /** @class */ (function () {
function Scanner(code, handler) {
this.source = code;
this.errorHandler = handler;
this.trackComment = false;
this.isModule = false;
this.length = code.length;
this.index = 0;
this.lineNumber = (code.length > 0) ? 1 : 0;
this.lineStart = 0;
this.curlyStack = [];
}
Scanner.prototype.saveState = function () {
return {
index: this.index,
lineNumber: this.lineNumber,
lineStart: this.lineStart
};
};
Scanner.prototype.restoreState = function (state) {
this.index = state.index;
this.lineNumber = state.lineNumber;
this.lineStart = state.lineStart;
};
Scanner.prototype.eof = function () {
return this.index >= this.length;
};
Scanner.prototype.throwUnexpectedToken = function (message) {
if (message === void 0) { message = messages_1.Messages.UnexpectedTokenIllegal; }
return this.errorHandler.throwError(this.index, this.lineNumber, this.index - this.lineStart + 1, message);
};
Scanner.prototype.tolerateUnexpectedToken = function (message) {
if (message === void 0) { message = messages_1.Messages.UnexpectedTokenIllegal; }
this.errorHandler.tolerateError(this.index, this.lineNumber, this.index - this.lineStart + 1, message);
};
// https://tc39.github.io/ecma262/#sec-comments
Scanner.prototype.skipSingleLineComment = function (offset) {
var comments = [];
var start, loc;
if (this.trackComment) {
comments = [];
start = this.index - offset;
loc = {
start: {
line: this.lineNumber,
column: this.index - this.lineStart - offset
},
end: {}
};
}
while (!this.eof()) {
var ch = this.source.charCodeAt(this.index);
++this.index;
if (character_1.Character.isLineTerminator(ch)) {
if (this.trackComment) {
loc.end = {
line: this.lineNumber,
column: this.index - this.lineStart - 1
};
var entry = {
multiLine: false,
slice: [start + offset, this.index - 1],
range: [start, this.index - 1],
loc: loc
};
comments.push(entry);
}
if (ch === 13 && this.source.charCodeAt(this.index) === 10) {
++this.index;
}
++this.lineNumber;
this.lineStart = this.index;
return comments;
}
}
if (this.trackComment) {
loc.end = {
line: this.lineNumber,
column: this.index - this.lineStart
};
var entry = {
multiLine: false,
slice: [start + offset, this.index],
range: [start, this.index],
loc: loc
};
comments.push(entry);
}
return comments;
};
Scanner.prototype.skipMultiLineComment = function () {
var comments = [];
var start, loc;
if (this.trackComment) {
comments = [];
start = this.index - 2;
loc = {
start: {
line: this.lineNumber,
column: this.index - this.lineStart - 2
},
end: {}
};
}
while (!this.eof()) {
var ch = this.source.charCodeAt(this.index);
if (character_1.Character.isLineTerminator(ch)) {
if (ch === 0x0D && this.source.charCodeAt(this.index + 1) === 0x0A) {
++this.index;
}
++this.lineNumber;
++this.index;
this.lineStart = this.index;
}
else if (ch === 0x2A) {
// Block comment ends with '*/'.
if (this.source.charCodeAt(this.index + 1) === 0x2F) {
this.index += 2;
if (this.trackComment) {
loc.end = {
line: this.lineNumber,
column: this.index - this.lineStart
};
var entry = {
multiLine: true,
slice: [start + 2, this.index - 2],
range: [start, this.index],
loc: loc
};
comments.push(entry);
}
return comments;
}
++this.index;
}
else {
++this.index;
}
}
// Ran off the end of the file - the whole thing is a comment
if (this.trackComment) {
loc.end = {
line: this.lineNumber,
column: this.index - this.lineStart
};
var entry = {
multiLine: true,
slice: [start + 2, this.index],
range: [start, this.index],
loc: loc
};
comments.push(entry);
}
this.tolerateUnexpectedToken();
return comments;
};
Scanner.prototype.scanComments = function () {
var comments;
if (this.trackComment) {
comments = [];
}
var start = (this.index === 0);
while (!this.eof()) {
var ch = this.source.charCodeAt(this.index);
if (character_1.Character.isWhiteSpace(ch)) {
++this.index;
}
else if (character_1.Character.isLineTerminator(ch)) {
++this.index;
if (ch === 0x0D && this.source.charCodeAt(this.index) === 0x0A) {
++this.index;
}
++this.lineNumber;
this.lineStart = this.index;
start = true;
}
else if (ch === 0x2F) { // U+002F is '/'
ch = this.source.charCodeAt(this.index + 1);
if (ch === 0x2F) {
this.index += 2;
var comment = this.skipSingleLineComment(2);
if (this.trackComment) {
comments = comments.concat(comment);
}
start = true;
}
else if (ch === 0x2A) { // U+002A is '*'
this.index += 2;
var comment = this.skipMultiLineComment();
if (this.trackComment) {
comments = comments.concat(comment);
}
}
else {
break;
}
}
else if (start && ch === 0x2D) { // U+002D is '-'
// U+003E is '>'
if ((this.source.charCodeAt(this.index + 1) === 0x2D) && (this.source.charCodeAt(this.index + 2) === 0x3E)) {
// '-->' is a single-line comment
this.index += 3;
var comment = this.skipSingleLineComment(3);
if (this.trackComment) {
comments = comments.concat(comment);
}
}
else {
break;
}
}
else if (ch === 0x3C && !this.isModule) { // U+003C is '<'
if (this.source.slice(this.index + 1, this.index + 4) === '!--') {
this.index += 4; // `<!--`
var comment = this.skipSingleLineComment(4);
if (this.trackComment) {
comments = comments.concat(comment);
}
}
else {
break;
}
}
else {
break;
}
}
return comments;
};
// https://tc39.github.io/ecma262/#sec-future-reserved-words
Scanner.prototype.isFutureReservedWord = function (id) {
switch (id) {
case 'enum':
case 'export':
case 'import':
case 'super':
return true;
default:
return false;
}
};
Scanner.prototype.isStrictModeReservedWord = function (id) {
switch (id) {
case 'implements':
case 'interface':
case 'package':
case 'private':
case 'protected':
case 'public':
case 'static':
case 'yield':
case 'let':
return true;
default:
return false;
}
};
Scanner.prototype.isRestrictedWord = function (id) {
return id === 'eval' || id === 'arguments';
};
// https://tc39.github.io/ecma262/#sec-keywords
Scanner.prototype.isKeyword = function (id) {
switch (id.length) {
case 2:
return (id === 'if') || (id === 'in') || (id === 'do');
case 3:
return (id === 'var') || (id === 'for') || (id === 'new') ||
(id === 'try') || (id === 'let');
case 4:
return (id === 'this') || (id === 'else') || (id === 'case') ||
(id === 'void') || (id === 'with') || (id === 'enum');
case 5:
return (id === 'while') || (id === 'break') || (id === 'catch') ||
(id === 'throw') || (id === 'const') || (id === 'yield') ||
(id === 'class') || (id === 'super');
case 6:
return (id === 'return') || (id === 'typeof') || (id === 'delete') ||
(id === 'switch') || (id === 'export') || (id === 'import');
case 7:
return (id === 'default') || (id === 'finally') || (id === 'extends');
case 8:
return (id === 'function') || (id === 'continue') || (id === 'debugger');
case 10:
return (id === 'instanceof');
default:
return false;
}
};
Scanner.prototype.codePointAt = function (i) {
var cp = this.source.charCodeAt(i);
if (cp >= 0xD800 && cp <= 0xDBFF) {
var second = this.source.charCodeAt(i + 1);
if (second >= 0xDC00 && second <= 0xDFFF) {
var first = cp;
cp = (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000;
}
}
return cp;
};
Scanner.prototype.scanHexEscape = function (prefix) {
var len = (prefix === 'u') ? 4 : 2;
var code = 0;
for (var i = 0; i < len; ++i) {
if (!this.eof() && character_1.Character.isHexDigit(this.source.charCodeAt(this.index))) {
code = code * 16 + hexValue(this.source[this.index++]);
}
else {
return null;
}
}
return String.fromCharCode(code);
};
Scanner.prototype.scanUnicodeCodePointEscape = function () {
var ch = this.source[this.index];
var code = 0;
// At least, one hex digit is required.
if (ch === '}') {
this.throwUnexpectedToken();
}
while (!this.eof()) {
ch = this.source[this.index++];
if (!character_1.Character.isHexDigit(ch.charCodeAt(0))) {
break;
}
code = code * 16 + hexValue(ch);
}
if (code > 0x10FFFF || ch !== '}') {
this.throwUnexpectedToken();
}
return character_1.Character.fromCodePoint(code);
};
Scanner.prototype.getIdentifier = function () {
var start = this.index++;
while (!this.eof()) {
var ch = this.source.charCodeAt(this.index);
if (ch === 0x5C) {
// Blackslash (U+005C) marks Unicode escape sequence.
this.index = start;
return this.getComplexIdentifier();
}
else if (ch >= 0xD800 && ch < 0xDFFF) {
// Need to handle surrogate pairs.
this.index = start;
return this.getComplexIdentifier();
}
if (character_1.Character.isIdentifierPart(ch)) {
++this.index;
}
else {
break;
}
}
return this.source.slice(start, this.index);
};
Scanner.prototype.getComplexIdentifier = function () {
var cp = this.codePointAt(this.index);
var id = character_1.Character.fromCodePoint(cp);
this.index += id.length;
// '\u' (U+005C, U+0075) denotes an escaped character.
var ch;
if (cp === 0x5C) {
if (this.source.charCodeAt(this.index) !== 0x75) {
this.throwUnexpectedToken();
}
++this.index;
if (this.source[this.index] === '{') {
++this.index;
ch = this.scanUnicodeCodePointEscape();
}
else {
ch = this.scanHexEscape('u');
if (ch === null || ch === '\\' || !character_1.Character.isIdentifierStart(ch.charCodeAt(0))) {
this.throwUnexpectedToken();
}
}
id = ch;
}
while (!this.eof()) {
cp = this.codePointAt(this.index);
if (!character_1.Character.isIdentifierPart(cp)) {
break;
}
ch = character_1.Character.fromCodePoint(cp);
id += ch;
this.index += ch.length;
// '\u' (U+005C, U+0075) denotes an escaped character.
if (cp === 0x5C) {
id = id.substr(0, id.length - 1);
if (this.source.charCodeAt(this.index) !== 0x75) {
this.throwUnexpectedToken();
}
++this.index;
if (this.source[this.index] === '{') {
++this.index;
ch = this.scanUnicodeCodePointEscape();
}
else {
ch = this.scanHexEscape('u');
if (ch === null || ch === '\\' || !character_1.Character.isIdentifierPart(ch.charCodeAt(0))) {
this.throwUnexpectedToken();
}
}
id += ch;
}
}
return id;
};
Scanner.prototype.octalToDecimal = function (ch) {
// \0 is not octal escape sequence
var octal = (ch !== '0');
var code = octalValue(ch);
if (!this.eof() && character_1.Character.isOctalDigit(this.source.charCodeAt(this.index))) {
octal = true;
code = code * 8 + octalValue(this.source[this.index++]);
// 3 digits are only allowed when string starts
// with 0, 1, 2, 3
if ('0123'.indexOf(ch) >= 0 && !this.eof() && character_1.Character.isOctalDigit(this.source.charCodeAt(this.index))) {
code = code * 8 + octalValue(this.source[this.index++]);
}
}
return {
code: code,
octal: octal
};
};
// https://tc39.github.io/ecma262/#sec-names-and-keywords
Scanner.prototype.scanIdentifier = function () {
var type;
var start = this.index;
// Backslash (U+005C) starts an escaped character.
var id = (this.source.charCodeAt(start) === 0x5C) ? this.getComplexIdentifier() : this.getIdentifier();
// There is no keyword or literal with only one character.
// Thus, it must be an identifier.
if (id.length === 1) {
type = 3 /* Identifier */;
}
else if (this.isKeyword(id)) {
type = 4 /* Keyword */;
}
else if (id === 'null') {
type = 5 /* NullLiteral */;
}
else if (id === 'true' || id === 'false') {
type = 1 /* BooleanLiteral */;
}
else {
type = 3 /* Identifier */;
}
if (type !== 3 /* Identifier */ && (start + id.length !== this.index)) {
var restore = this.index;
this.index = start;
this.tolerateUnexpectedToken(messages_1.Messages.InvalidEscapedReservedWord);
this.index = restore;
}
return {
type: type,
value: id,
lineNumber: this.lineNumber,
lineStart: this.lineStart,
start: start,
end: this.index
};
};
// https://tc39.github.io/ecma262/#sec-punctuators
Scanner.prototype.scanPunctuator = function () {
var start = this.index;
// Check for most common single-character punctuators.
var str = this.source[this.index];
switch (str) {
case '(':
case '{':
if (str === '{') {
this.curlyStack.push('{');
}
++this.index;
break;
case '.':
++this.index;
if (this.source[this.index] === '.' && this.source[this.index + 1] === '.') {
// Spread operator: ...
this.index += 2;
str = '...';
}
break;
case '}':
++this.index;
this.curlyStack.pop();
break;
case ')':
case ';':
case ',':
case '[':
case ']':
case ':':
case '?':
case '~':
++this.index;
break;
default:
// 4-character punctuator.
str = this.source.substr(this.index, 4);
if (str === '>>>=') {
this.index += 4;
}
else {
// 3-character punctuators.
str = str.substr(0, 3);
if (str === '===' || str === '!==' || str === '>>>' ||
str === '<<=' || str === '>>=' || str === '**=') {
this.index += 3;
}
else {
// 2-character punctuators.
str = str.substr(0, 2);
if (str === '&&' || str === '||' || str === '==' || str === '!=' ||
str === '+=' || str === '-=' || str === '*=' || str === '/=' ||
str === '++' || str === '--' || str === '<<' || str === '>>' ||
str === '&=' || str === '|=' || str === '^=' || str === '%=' ||
str === '<=' || str === '>=' || str === '=>' || str === '**') {
this.index += 2;
}
else {
// 1-character punctuators.
str = this.source[this.index];
if ('<>=!+-*%&|^/'.indexOf(str) >= 0) {
++this.index;
}
}
}
}
}
if (this.index === start) {
this.throwUnexpectedToken();
}
return {
type: 7 /* Punctuator */,
value: str,
lineNumber: this.lineNumber,
lineStart: this.lineStart,
start: start,
end: this.index
};
};
// https://tc39.github.io/ecma262/#sec-literals-numeric-literals
Scanner.prototype.scanHexLiteral = function (start) {
var num = '';
while (!this.eof()) {
if (!character_1.Character.isHexDigit(this.source.charCodeAt(this.index))) {
break;
}
num += this.source[this.index++];
}
if (num.length === 0) {
this.throwUnexpectedToken();
}
if (character_1.Character.isIdentifierStart(this.source.charCodeAt(this.index))) {
this.throwUnexpectedToken();
}
return {
type: 6 /* NumericLiteral */,
value: parseInt('0x' + num, 16),
lineNumber: this.lineNumber,
lineStart: this.lineStart,
start: start,
end: this.index
};
};
Scanner.prototype.scanBinaryLiteral = function (start) {
var num = '';
var ch;
while (!this.eof()) {
ch = this.source[this.index];
if (ch !== '0' && ch !== '1') {
break;
}
num += this.source[this.index++];
}
if (num.length === 0) {
// only 0b or 0B
this.throwUnexpectedToken();
}
if (!this.eof()) {
ch = this.source.charCodeAt(this.index);
/* istanbul ignore else */
if (character_1.Character.isIdentifierStart(ch) || character_1.Character.isDecimalDigit(ch)) {
this.throwUnexpectedToken();
}
}
return {
type: 6 /* NumericLiteral */,
value: parseInt(num, 2),
lineNumber: this.lineNumber,
lineStart: this.lineStart,
start: start,
end: this.index
};
};
Scanner.prototype.scanOctalLiteral = function (prefix, start) {
var num = '';
var octal = false;
if (character_1.Character.isOctalDigit(prefix.charCodeAt(0))) {
octal = true;
num = '0' + this.source[this.index++];
}
else {
++this.index;
}
while (!this.eof()) {
if (!character_1.Character.isOctalDigit(this.source.charCodeAt(this.index))) {
break;
}
num += this.source[this.index++];
}
if (!octal && num.length === 0) {
// only 0o or 0O
this.throwUnexpectedToken();
}
if (character_1.Character.isIdentifierStart(this.source.charCodeAt(this.index)) || character_1.Character.isDecimalDigit(this.source.charCodeAt(this.index))) {
this.throwUnexpectedToken();
}
return {
type: 6 /* NumericLiteral */,
value: parseInt(num, 8),
octal: octal,
lineNumber: this.lineNumber,
lineStart: this.lineStart,
start: start,
end: this.index
};
};
Scanner.prototype.isImplicitOctalLiteral = function () {
// Implicit octal, unless there is a non-octal digit.
// (Annex B.1.1 on Numeric Literals)
for (var i = this.index + 1; i < this.length; ++i) {
var ch = this.source[i];
if (ch === '8' || ch === '9') {
return false;
}
if (!character_1.Character.isOctalDigit(ch.charCodeAt(0))) {
return true;
}
}
return true;
};
Scanner.prototype.scanNumericLiteral = function () {
var start = this.index;
var ch = this.source[start];
assert_1.assert(character_1.Character.isDecimalDigit(ch.charCodeAt(0)) || (ch === '.'), 'Numeric literal must start with a decimal digit or a decimal point');
var num = '';
if (ch !== '.') {
num = this.source[this.index++];
ch = this.source[this.index];
// Hex number starts with '0x'.
// Octal number starts with '0'.
// Octal number in ES6 starts with '0o'.
// Binary number in ES6 starts with '0b'.
if (num === '0') {
if (ch === 'x' || ch === 'X') {
++this.index;
return this.scanHexLiteral(start);
}
if (ch === 'b' || ch === 'B') {
++this.index;
return this.scanBinaryLiteral(start);
}
if (ch === 'o' || ch === 'O') {
return this.scanOctalLiteral(ch, start);
}
if (ch && character_1.Character.isOctalDigit(ch.charCodeAt(0))) {
if (this.isImplicitOctalLiteral()) {
return this.scanOctalLiteral(ch, start);
}
}
}
while (character_1.Character.isDecimalDigit(this.source.charCodeAt(this.index))) {
num += this.source[this.index++];
}
ch = this.source[this.index];
}
if (ch === '.') {
num += this.source[this.index++];
while (character_1.Character.isDecimalDigit(this.source.charCodeAt(this.index))) {
num += this.source[this.index++];
}
ch = this.source[this.index];
}
if (ch === 'e' || ch === 'E') {
num += this.source[this.index++];
ch = this.source[this.index];
if (ch === '+' || ch === '-') {
num += this.source[this.index++];
}
if (character_1.Character.isDecimalDigit(this.source.charCodeAt(this.index))) {
while (character_1.Character.isDecimalDigit(this.source.charCodeAt(this.index))) {
num += this.source[this.index++];
}
}
else {
this.throwUnexpectedToken();
}
}
if (character_1.Character.isIdentifierStart(this.source.charCodeAt(this.index))) {
this.throwUnexpectedToken();
}
return {
type: 6 /* NumericLiteral */,
value: parseFloat(num),
lineNumber: this.lineNumber,
lineStart: this.lineStart,
start: start,
end: this.index
};
};
// https://tc39.github.io/ecma262/#sec-literals-string-literals
Scanner.prototype.scanStringLiteral = function () {
var start = this.index;
var quote = this.source[start];
assert_1.assert((quote === '\'' || quote === '"'), 'String literal must starts with a quote');
++this.index;
var octal = false;
var str = '';
while (!this.eof()) {
var ch = this.source[this.index++];
if (ch === quote) {
quote = '';
break;
}
else if (ch === '\\') {
ch = this.source[this.index++];
if (!ch || !character_1.Character.isLineTerminator(ch.charCodeAt(0))) {
switch (ch) {
case 'u':
if (this.source[this.index] === '{') {
++this.index;
str += this.scanUnicodeCodePointEscape();
}
else {
var unescaped_1 = this.scanHexEscape(ch);
if (unescaped_1 === null) {
this.throwUnexpectedToken();
}
str += unescaped_1;
}
break;
case 'x':
var unescaped = this.scanHexEscape(ch);
if (unescaped === null) {
this.throwUnexpectedToken(messages_1.Messages.InvalidHexEscapeSequence);
}
str += unescaped;
break;
case 'n':
str += '\n';
break;
case 'r':
str += '\r';
break;
case 't':
str += '\t';
break;
case 'b':
str += '\b';
break;
case 'f':
str += '\f';
break;
case 'v':
str += '\x0B';
break;
case '8':
case '9':
str += ch;
this.tolerateUnexpectedToken();
break;
default:
if (ch && character_1.Character.isOctalDigit(ch.charCodeAt(0))) {
var octToDec = this.octalToDecimal(ch);
octal = octToDec.octal || octal;
str += String.fromCharCode(octToDec.code);
}
else {
str += ch;
}
break;
}
}
else {
++this.lineNumber;
if (ch === '\r' && this.source[this.index] === '\n') {
++this.index;
}
this.lineStart = this.index;
}
}
else if (character_1.Character.isLineTerminator(ch.charCodeAt(0))) {
break;
}
else {
str += ch;
}
}
if (quote !== '') {
this.index = start;
this.throwUnexpectedToken();
}
return {
type: 8 /* StringLiteral */,
value: str,
octal: octal,
lineNumber: this.lineNumber,
lineStart: this.lineStart,
start: start,
end: this.index
};
};
// https://tc39.github.io/ecma262/#sec-template-literal-lexical-components
Scanner.prototype.scanTemplate = function () {
var cooked = '';
var terminated = false;
var start = this.index;
var head = (this.source[start] === '`');
var tail = false;
var rawOffset = 2;
++this.index;
while (!this.eof()) {
var ch = this.source[this.index++];
if (ch === '`') {
rawOffset = 1;
tail = true;
terminated = true;
break;
}
else if (ch === '$') {
if (this.source[this.index] === '{') {
this.curlyStack.push('${');
++this.index;
terminated = true;
break;
}
cooked += ch;
}
else if (ch === '\\') {
ch = this.source[this.index++];
if (!character_1.Character.isLineTerminator(ch.charCodeAt(0))) {
switch (ch) {
case 'n':
cooked += '\n';
break;
case 'r':
cooked += '\r';
break;
case 't':
cooked += '\t';
break;
case 'u':
if (this.source[this.index] === '{') {
++this.index;
cooked += this.scanUnicodeCodePointEscape();
}
else {
var restore = this.index;
var unescaped_2 = this.scanHexEscape(ch);
if (unescaped_2 !== null) {
cooked += unescaped_2;
}
else {
this.index = restore;
cooked += ch;
}
}
break;
case 'x':
var unescaped = this.scanHexEscape(ch);
if (unescaped === null) {
this.throwUnexpectedToken(messages_1.Messages.InvalidHexEscapeSequence);
}
cooked += unescaped;
break;
case 'b':
cooked += '\b';
break;
case 'f':
cooked += '\f';
break;
case 'v':
cooked += '\v';
break;
default:
if (ch === '0') {
if (character_1.Character.isDecimalDigit(this.source.charCodeAt(this.index))) {
// Illegal: \01 \02 and so on
this.throwUnexpectedToken(messages_1.Messages.TemplateOctalLiteral);
}
cooked += '\0';
}
else if (character_1.Character.isOctalDigit(ch.charCodeAt(0))) {
// Illegal: \1 \2
this.throwUnexpectedToken(messages_1.Messages.TemplateOctalLiteral);
}
else {
cooked += ch;
}
break;
}
}
else {
++this.lineNumber;
if (ch === '\r' && this.source[this.index] === '\n') {
++this.index;
}
this.lineStart = this.index;
}
}
else if (character_1.Character.isLineTerminator(ch.charCodeAt(0))) {
++this.lineNumber;
if (ch === '\r' && this.source[this.index] === '\n') {
++this.index;
}
this.lineStart = this.index;
cooked += '\n';
}
else {
cooked += ch;
}
}
if (!terminated) {
this.throwUnexpectedToken();
}
if (!head) {
this.curlyStack.pop();
}
return {
type: 10 /* Template */,
value: this.source.slice(start + 1, this.index - rawOffset),
cooked: cooked,
head: head,
tail: tail,
lineNumber: this.lineNumber,
lineStart: this.lineStart,
start: start,
end: this.index
};
};
// https://tc39.github.io/ecma262/#sec-literals-regular-expression-literals
Scanner.prototype.testRegExp = function (pattern, flags) {
// The BMP character to use as a replacement for astral symbols when
// translating an ES6 "u"-flagged pattern to an ES5-compatible
// approximation.
// Note: replacing with '\uFFFF' enables false positives in unlikely
// scenarios. For example, `[\u{1044f}-\u{10440}]` is an invalid
// pattern that would not be detected by this substitution.
var astralSubstitute = '\uFFFF';
var tmp = pattern;
var self = this;
if (flags.indexOf('u') >= 0) {
tmp = tmp
// Replace every Unicode escape sequence with the equivalent
// BMP character or a constant ASCII code point in the case of
// astral symbols. (See the above note on `astralSubstitute`
// for more information.)
.replace(/\\u\{([0-9a-fA-F]+)\}|\\u([a-fA-F0-9]{4})/g, function ($0, $1, $2) {
var codePoint = parseInt($1 || $2, 16);
if (codePoint > 0x10FFFF) {
self.throwUnexpectedToken(messages_1.Messages.InvalidRegExp);
}
if (codePoint <= 0xFFFF) {
return String.fromCharCode(codePoint);
}
return astralSubstitute;
})
// Replace each paired surrogate with a single ASCII symbol to
// avoid throwing on regular expressions that are only valid in
// combination with the "u" flag.
.replace(/[\uD800-\uDBFF][\uDC00-\uDFFF]/g, astralSubstitute);
}
// First, detect invalid regular expressions.
try {
RegExp(tmp);
}
catch (e) {
this.throwUnexpectedToken(messages_1.Messages.InvalidRegExp);
}
// Return a regular expression object for this pattern-flag pair, or
// `null` in case the current environment doesn't support the flags it
// uses.
try {
return new RegExp(pattern, flags);
}
catch (exception) {
/* istanbul ignore next */
return null;
}
};
Scanner.prototype.scanRegExpBody = function () {
var ch = this.source[this.index];
assert_1.assert(ch === '/', 'Regular expression literal must start with a slash');
var str = this.source[this.index++];
var classMarker = false;
var terminated = false;
while (!this.eof()) {
ch = this.source[this.index++];
str += ch;
if (ch === '\\') {
ch = this.source[this.index++];
// https://tc39.github.io/ecma262/#sec-literals-regular-expression-literals
if (character_1.Character.isLineTerminator(ch.charCodeAt(0))) {
this.throwUnexpectedToken(messages_1.Messages.UnterminatedRegExp);
}
str += ch;
}
else if (character_1.Character.isLineTerminator(ch.charCodeAt(0))) {
this.throwUnexpectedToken(messages_1.Messages.UnterminatedRegExp);
}
else if (classMarker) {
if (ch === ']') {
classMarker = false;
}
}
else {
if (ch === '/') {
terminated = true;
break;
}
else if (ch === '[') {
classMarker = true;
}
}
}
if (!terminated) {
this.throwUnexpectedToken(messages_1.Messages.UnterminatedRegExp);
}
// Exclude leading and trailing slash.
return str.substr(1, str.length - 2);
};
Scanner.prototype.scanRegExpFlags = function () {
var str = '';
var flags = '';
while (!this.eof()) {
var ch = this.source[this.index];
if (!character_1.Character.isIdentifierPart(ch.charCodeAt(0))) {
break;
}
++this.index;
if (ch === '\\' && !this.eof()) {
ch = this.source[this.index];
if (ch === 'u') {
++this.index;
var restore = this.index;
var char = this.scanHexEscape('u');
if (char !== null) {
flags += char;
for (str += '\\u'; restore < this.index; ++restore) {
str += this.source[restore];
}
}
else {
this.index = restore;
flags += 'u';
str += '\\u';
}
this.tolerateUnexpectedToken();
}
else {
str += '\\';
this.tolerateUnexpectedToken();
}
}
else {
flags += ch;
str += ch;
}
}
return flags;
};
Scanner.prototype.scanRegExp = function () {
var start = this.index;
var pattern = this.scanRegExpBody();
var flags = this.scanRegExpFlags();
var value = this.testRegExp(pattern, flags);
return {
type: 9 /* RegularExpression */,
value: '',
pattern: pattern,
flags: flags,
regex: value,
lineNumber: this.lineNumber,
lineStart: this.lineStart,
start: start,
end: this.index
};
};
Scanner.prototype.lex = function () {
if (this.eof()) {
return {
type: 2 /* EOF */,
value: '',
lineNumber: this.lineNumber,
lineStart: this.lineStart,
start: this.index,
end: this.index
};
}
var cp = this.source.charCodeAt(this.index);
if (character_1.Character.isIdentifierStart(cp)) {
return this.scanIdentifier();
}
// Very common: ( and ) and ;
if (cp === 0x28 || cp === 0x29 || cp === 0x3B) {
return this.scanPunctuator();
}
// String literal starts with single quote (U+0027) or double quote (U+0022).
if (cp === 0x27 || cp === 0x22) {
return this.scanStringLiteral();
}
// Dot (.) U+002E can also start a floating-point number, hence the need
// to check the next character.
if (cp === 0x2E) {
if (character_1.Character.isDecimalDigit(this.source.charCodeAt(this.index + 1))) {
return this.scanNumericLiteral();
}
return this.scanPunctuator();
}
if (character_1.Character.isDecimalDigit(cp)) {
return this.scanNumericLiteral();
}
// Template literals start with ` (U+0060) for template head
// or } (U+007D) for template middle or template tail.
if (cp === 0x60 || (cp === 0x7D && this.curlyStack[this.curlyStack.length - 1] === '${')) {
return this.scanTemplate();
}
// Possible identifier start in a surrogate pair.
if (cp >= 0xD800 && cp < 0xDFFF) {
if (character_1.Character.isIdentifierStart(this.codePointAt(this.index))) {
return this.scanIdentifier();
}
}
return this.scanPunctuator();
};
return Scanner;
}());
exports.Scanner = Scanner;
|
:: Command execute :: | |
--[ c99shell v. 2.5 [PHP 8 Update] [24.05.2025] | Generation time: 0.0042 ]-- |