889 lines
28 KiB
JavaScript
889 lines
28 KiB
JavaScript
"use strict";
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exports.__esModule = true;
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exports.Token = undefined;
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var _identifier = require("../util/identifier");
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var _types = require("./types");
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var _context = require("./context");
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var _location = require("../util/location");
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var _whitespace = require("../util/whitespace");
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var _state = require("./state");
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var _state2 = _interopRequireDefault(_state);
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } } /* eslint max-len: 0 */
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/* eslint indent: 0 */
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// Object type used to represent tokens. Note that normally, tokens
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// simply exist as properties on the parser object. This is only
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// used for the onToken callback and the external tokenizer.
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var Token = exports.Token = function Token(state) {
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_classCallCheck(this, Token);
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this.type = state.type;
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this.value = state.value;
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this.start = state.start;
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this.end = state.end;
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this.loc = new _location.SourceLocation(state.startLoc, state.endLoc);
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};
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// ## Tokenizer
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function codePointToString(code) {
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// UTF-16 Decoding
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if (code <= 0xFFFF) {
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return String.fromCharCode(code);
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} else {
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return String.fromCharCode((code - 0x10000 >> 10) + 0xD800, (code - 0x10000 & 1023) + 0xDC00);
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}
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}
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var Tokenizer = function () {
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function Tokenizer(options, input) {
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_classCallCheck(this, Tokenizer);
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this.state = new _state2.default();
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this.state.init(options, input);
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}
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// Move to the next token
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Tokenizer.prototype.next = function next() {
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if (!this.isLookahead) {
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this.state.tokens.push(new Token(this.state));
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}
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this.state.lastTokEnd = this.state.end;
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this.state.lastTokStart = this.state.start;
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this.state.lastTokEndLoc = this.state.endLoc;
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this.state.lastTokStartLoc = this.state.startLoc;
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this.nextToken();
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};
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// TODO
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Tokenizer.prototype.eat = function eat(type) {
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if (this.match(type)) {
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this.next();
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return true;
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} else {
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return false;
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}
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};
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// TODO
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Tokenizer.prototype.match = function match(type) {
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return this.state.type === type;
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};
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// TODO
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Tokenizer.prototype.isKeyword = function isKeyword(word) {
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return (0, _identifier.isKeyword)(word);
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};
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// TODO
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Tokenizer.prototype.lookahead = function lookahead() {
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var old = this.state;
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this.state = old.clone(true);
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this.isLookahead = true;
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this.next();
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this.isLookahead = false;
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var curr = this.state.clone(true);
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this.state = old;
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return curr;
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};
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// Toggle strict mode. Re-reads the next number or string to please
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// pedantic tests (`"use strict"; 010;` should fail).
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Tokenizer.prototype.setStrict = function setStrict(strict) {
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this.state.strict = strict;
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if (!this.match(_types.types.num) && !this.match(_types.types.string)) return;
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this.state.pos = this.state.start;
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while (this.state.pos < this.state.lineStart) {
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this.state.lineStart = this.input.lastIndexOf("\n", this.state.lineStart - 2) + 1;
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--this.state.curLine;
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}
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this.nextToken();
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};
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Tokenizer.prototype.curContext = function curContext() {
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return this.state.context[this.state.context.length - 1];
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};
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// Read a single token, updating the parser object's token-related
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// properties.
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Tokenizer.prototype.nextToken = function nextToken() {
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var curContext = this.curContext();
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if (!curContext || !curContext.preserveSpace) this.skipSpace();
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this.state.containsOctal = false;
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this.state.octalPosition = null;
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this.state.start = this.state.pos;
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this.state.startLoc = this.state.curPosition();
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if (this.state.pos >= this.input.length) return this.finishToken(_types.types.eof);
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if (curContext.override) {
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return curContext.override(this);
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} else {
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return this.readToken(this.fullCharCodeAtPos());
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}
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};
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Tokenizer.prototype.readToken = function readToken(code) {
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// Identifier or keyword. '\uXXXX' sequences are allowed in
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// identifiers, so '\' also dispatches to that.
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if ((0, _identifier.isIdentifierStart)(code) || code === 92 /* '\' */) {
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return this.readWord();
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} else {
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return this.getTokenFromCode(code);
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}
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};
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Tokenizer.prototype.fullCharCodeAtPos = function fullCharCodeAtPos() {
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var code = this.input.charCodeAt(this.state.pos);
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if (code <= 0xd7ff || code >= 0xe000) return code;
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var next = this.input.charCodeAt(this.state.pos + 1);
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return (code << 10) + next - 0x35fdc00;
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};
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Tokenizer.prototype.pushComment = function pushComment(block, text, start, end, startLoc, endLoc) {
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var comment = {
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type: block ? "CommentBlock" : "CommentLine",
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value: text,
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start: start,
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end: end,
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loc: new _location.SourceLocation(startLoc, endLoc)
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};
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if (!this.isLookahead) {
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this.state.tokens.push(comment);
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this.state.comments.push(comment);
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this.addComment(comment);
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}
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};
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Tokenizer.prototype.skipBlockComment = function skipBlockComment() {
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var startLoc = this.state.curPosition();
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var start = this.state.pos,
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end = this.input.indexOf("*/", this.state.pos += 2);
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if (end === -1) this.raise(this.state.pos - 2, "Unterminated comment");
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this.state.pos = end + 2;
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_whitespace.lineBreakG.lastIndex = start;
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var match = void 0;
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while ((match = _whitespace.lineBreakG.exec(this.input)) && match.index < this.state.pos) {
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++this.state.curLine;
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this.state.lineStart = match.index + match[0].length;
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}
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this.pushComment(true, this.input.slice(start + 2, end), start, this.state.pos, startLoc, this.state.curPosition());
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};
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Tokenizer.prototype.skipLineComment = function skipLineComment(startSkip) {
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var start = this.state.pos;
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var startLoc = this.state.curPosition();
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var ch = this.input.charCodeAt(this.state.pos += startSkip);
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while (this.state.pos < this.input.length && ch !== 10 && ch !== 13 && ch !== 8232 && ch !== 8233) {
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++this.state.pos;
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ch = this.input.charCodeAt(this.state.pos);
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}
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this.pushComment(false, this.input.slice(start + startSkip, this.state.pos), start, this.state.pos, startLoc, this.state.curPosition());
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};
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// Called at the start of the parse and after every token. Skips
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// whitespace and comments, and.
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Tokenizer.prototype.skipSpace = function skipSpace() {
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loop: while (this.state.pos < this.input.length) {
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var ch = this.input.charCodeAt(this.state.pos);
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switch (ch) {
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case 32:case 160:
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// ' '
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++this.state.pos;
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break;
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case 13:
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if (this.input.charCodeAt(this.state.pos + 1) === 10) {
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++this.state.pos;
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}
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case 10:case 8232:case 8233:
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++this.state.pos;
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++this.state.curLine;
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this.state.lineStart = this.state.pos;
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break;
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case 47:
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// '/'
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switch (this.input.charCodeAt(this.state.pos + 1)) {
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case 42:
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// '*'
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this.skipBlockComment();
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break;
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case 47:
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this.skipLineComment(2);
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break;
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default:
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break loop;
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}
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break;
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default:
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if (ch > 8 && ch < 14 || ch >= 5760 && _whitespace.nonASCIIwhitespace.test(String.fromCharCode(ch))) {
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++this.state.pos;
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} else {
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break loop;
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}
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}
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}
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};
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// Called at the end of every token. Sets `end`, `val`, and
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// maintains `context` and `exprAllowed`, and skips the space after
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// the token, so that the next one's `start` will point at the
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// right position.
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Tokenizer.prototype.finishToken = function finishToken(type, val) {
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this.state.end = this.state.pos;
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this.state.endLoc = this.state.curPosition();
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var prevType = this.state.type;
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this.state.type = type;
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this.state.value = val;
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this.updateContext(prevType);
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};
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// ### Token reading
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// This is the function that is called to fetch the next token. It
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// is somewhat obscure, because it works in character codes rather
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// than characters, and because operator parsing has been inlined
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// into it.
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//
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// All in the name of speed.
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//
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Tokenizer.prototype.readToken_dot = function readToken_dot() {
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var next = this.input.charCodeAt(this.state.pos + 1);
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if (next >= 48 && next <= 57) {
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return this.readNumber(true);
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}
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var next2 = this.input.charCodeAt(this.state.pos + 2);
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if (next === 46 && next2 === 46) {
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// 46 = dot '.'
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this.state.pos += 3;
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return this.finishToken(_types.types.ellipsis);
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} else {
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++this.state.pos;
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return this.finishToken(_types.types.dot);
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}
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};
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Tokenizer.prototype.readToken_slash = function readToken_slash() {
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// '/'
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if (this.state.exprAllowed) {
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++this.state.pos;
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return this.readRegexp();
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}
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var next = this.input.charCodeAt(this.state.pos + 1);
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if (next === 61) {
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return this.finishOp(_types.types.assign, 2);
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} else {
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return this.finishOp(_types.types.slash, 1);
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}
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};
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Tokenizer.prototype.readToken_mult_modulo = function readToken_mult_modulo(code) {
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// '%*'
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var type = code === 42 ? _types.types.star : _types.types.modulo;
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var width = 1;
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var next = this.input.charCodeAt(this.state.pos + 1);
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if (next === 42) {
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// '*'
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width++;
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next = this.input.charCodeAt(this.state.pos + 2);
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type = _types.types.exponent;
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}
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if (next === 61) {
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width++;
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type = _types.types.assign;
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}
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return this.finishOp(type, width);
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};
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Tokenizer.prototype.readToken_pipe_amp = function readToken_pipe_amp(code) {
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// '|&'
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var next = this.input.charCodeAt(this.state.pos + 1);
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if (next === code) return this.finishOp(code === 124 ? _types.types.logicalOR : _types.types.logicalAND, 2);
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if (next === 61) return this.finishOp(_types.types.assign, 2);
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if (code === 124 && next === 125 && this.hasPlugin("flow")) return this.finishOp(_types.types.braceBarR, 2);
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return this.finishOp(code === 124 ? _types.types.bitwiseOR : _types.types.bitwiseAND, 1);
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};
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Tokenizer.prototype.readToken_caret = function readToken_caret() {
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// '^'
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var next = this.input.charCodeAt(this.state.pos + 1);
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if (next === 61) {
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return this.finishOp(_types.types.assign, 2);
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} else {
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return this.finishOp(_types.types.bitwiseXOR, 1);
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}
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};
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Tokenizer.prototype.readToken_plus_min = function readToken_plus_min(code) {
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// '+-'
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var next = this.input.charCodeAt(this.state.pos + 1);
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if (next === code) {
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if (next === 45 && this.input.charCodeAt(this.state.pos + 2) === 62 && _whitespace.lineBreak.test(this.input.slice(this.state.lastTokEnd, this.state.pos))) {
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// A `-->` line comment
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this.skipLineComment(3);
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this.skipSpace();
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return this.nextToken();
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}
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return this.finishOp(_types.types.incDec, 2);
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}
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if (next === 61) {
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return this.finishOp(_types.types.assign, 2);
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} else {
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return this.finishOp(_types.types.plusMin, 1);
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}
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};
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Tokenizer.prototype.readToken_lt_gt = function readToken_lt_gt(code) {
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// '<>'
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var next = this.input.charCodeAt(this.state.pos + 1);
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var size = 1;
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if (next === code) {
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size = code === 62 && this.input.charCodeAt(this.state.pos + 2) === 62 ? 3 : 2;
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if (this.input.charCodeAt(this.state.pos + size) === 61) return this.finishOp(_types.types.assign, size + 1);
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return this.finishOp(_types.types.bitShift, size);
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}
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if (next === 33 && code === 60 && this.input.charCodeAt(this.state.pos + 2) === 45 && this.input.charCodeAt(this.state.pos + 3) === 45) {
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if (this.inModule) this.unexpected();
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// `<!--`, an XML-style comment that should be interpreted as a line comment
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this.skipLineComment(4);
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this.skipSpace();
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return this.nextToken();
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}
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if (next === 61) {
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// <= | >=
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size = 2;
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}
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return this.finishOp(_types.types.relational, size);
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};
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Tokenizer.prototype.readToken_eq_excl = function readToken_eq_excl(code) {
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// '=!'
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var next = this.input.charCodeAt(this.state.pos + 1);
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if (next === 61) return this.finishOp(_types.types.equality, this.input.charCodeAt(this.state.pos + 2) === 61 ? 3 : 2);
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if (code === 61 && next === 62) {
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// '=>'
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this.state.pos += 2;
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return this.finishToken(_types.types.arrow);
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}
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return this.finishOp(code === 61 ? _types.types.eq : _types.types.prefix, 1);
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};
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Tokenizer.prototype.getTokenFromCode = function getTokenFromCode(code) {
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switch (code) {
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// The interpretation of a dot depends on whether it is followed
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// by a digit or another two dots.
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case 46:
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// '.'
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return this.readToken_dot();
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// Punctuation tokens.
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case 40:
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++this.state.pos;return this.finishToken(_types.types.parenL);
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case 41:
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++this.state.pos;return this.finishToken(_types.types.parenR);
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case 59:
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++this.state.pos;return this.finishToken(_types.types.semi);
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case 44:
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++this.state.pos;return this.finishToken(_types.types.comma);
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case 91:
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++this.state.pos;return this.finishToken(_types.types.bracketL);
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case 93:
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++this.state.pos;return this.finishToken(_types.types.bracketR);
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case 123:
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if (this.hasPlugin("flow") && this.input.charCodeAt(this.state.pos + 1) === 124) {
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return this.finishOp(_types.types.braceBarL, 2);
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} else {
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++this.state.pos;
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return this.finishToken(_types.types.braceL);
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}
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case 125:
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++this.state.pos;return this.finishToken(_types.types.braceR);
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case 58:
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if (this.hasPlugin("functionBind") && this.input.charCodeAt(this.state.pos + 1) === 58) {
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return this.finishOp(_types.types.doubleColon, 2);
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} else {
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++this.state.pos;
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return this.finishToken(_types.types.colon);
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}
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case 63:
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++this.state.pos;return this.finishToken(_types.types.question);
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case 64:
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++this.state.pos;return this.finishToken(_types.types.at);
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case 96:
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// '`'
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++this.state.pos;
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return this.finishToken(_types.types.backQuote);
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case 48:
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// '0'
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var next = this.input.charCodeAt(this.state.pos + 1);
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if (next === 120 || next === 88) return this.readRadixNumber(16); // '0x', '0X' - hex number
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if (next === 111 || next === 79) return this.readRadixNumber(8); // '0o', '0O' - octal number
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if (next === 98 || next === 66) return this.readRadixNumber(2); // '0b', '0B' - binary number
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// Anything else beginning with a digit is an integer, octal
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// number, or float.
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case 49:case 50:case 51:case 52:case 53:case 54:case 55:case 56:case 57:
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// 1-9
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return this.readNumber(false);
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// Quotes produce strings.
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case 34:case 39:
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// '"', "'"
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return this.readString(code);
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// Operators are parsed inline in tiny state machines. '=' (61) is
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// often referred to. `finishOp` simply skips the amount of
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// characters it is given as second argument, and returns a token
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// of the type given by its first argument.
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case 47:
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// '/'
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return this.readToken_slash();
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case 37:case 42:
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// '%*'
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return this.readToken_mult_modulo(code);
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case 124:case 38:
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// '|&'
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return this.readToken_pipe_amp(code);
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case 94:
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// '^'
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return this.readToken_caret();
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case 43:case 45:
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// '+-'
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return this.readToken_plus_min(code);
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case 60:case 62:
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// '<>'
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return this.readToken_lt_gt(code);
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|
|
case 61:case 33:
|
|
// '=!'
|
|
return this.readToken_eq_excl(code);
|
|
|
|
case 126:
|
|
// '~'
|
|
return this.finishOp(_types.types.prefix, 1);
|
|
}
|
|
|
|
this.raise(this.state.pos, "Unexpected character '" + codePointToString(code) + "'");
|
|
};
|
|
|
|
Tokenizer.prototype.finishOp = function finishOp(type, size) {
|
|
var str = this.input.slice(this.state.pos, this.state.pos + size);
|
|
this.state.pos += size;
|
|
return this.finishToken(type, str);
|
|
};
|
|
|
|
Tokenizer.prototype.readRegexp = function readRegexp() {
|
|
var escaped = void 0,
|
|
inClass = void 0,
|
|
start = this.state.pos;
|
|
for (;;) {
|
|
if (this.state.pos >= this.input.length) this.raise(start, "Unterminated regular expression");
|
|
var ch = this.input.charAt(this.state.pos);
|
|
if (_whitespace.lineBreak.test(ch)) {
|
|
this.raise(start, "Unterminated regular expression");
|
|
}
|
|
if (escaped) {
|
|
escaped = false;
|
|
} else {
|
|
if (ch === "[") {
|
|
inClass = true;
|
|
} else if (ch === "]" && inClass) {
|
|
inClass = false;
|
|
} else if (ch === "/" && !inClass) {
|
|
break;
|
|
}
|
|
escaped = ch === "\\";
|
|
}
|
|
++this.state.pos;
|
|
}
|
|
var content = this.input.slice(start, this.state.pos);
|
|
++this.state.pos;
|
|
// Need to use `readWord1` because '\uXXXX' sequences are allowed
|
|
// here (don't ask).
|
|
var mods = this.readWord1();
|
|
if (mods) {
|
|
var validFlags = /^[gmsiyu]*$/;
|
|
if (!validFlags.test(mods)) this.raise(start, "Invalid regular expression flag");
|
|
}
|
|
return this.finishToken(_types.types.regexp, {
|
|
pattern: content,
|
|
flags: mods
|
|
});
|
|
};
|
|
|
|
// Read an integer in the given radix. Return null if zero digits
|
|
// were read, the integer value otherwise. When `len` is given, this
|
|
// will return `null` unless the integer has exactly `len` digits.
|
|
|
|
Tokenizer.prototype.readInt = function readInt(radix, len) {
|
|
var start = this.state.pos,
|
|
total = 0;
|
|
for (var i = 0, e = len == null ? Infinity : len; i < e; ++i) {
|
|
var code = this.input.charCodeAt(this.state.pos),
|
|
val = void 0;
|
|
if (code >= 97) {
|
|
val = code - 97 + 10; // a
|
|
} else if (code >= 65) {
|
|
val = code - 65 + 10; // A
|
|
} else if (code >= 48 && code <= 57) {
|
|
val = code - 48; // 0-9
|
|
} else {
|
|
val = Infinity;
|
|
}
|
|
if (val >= radix) break;
|
|
++this.state.pos;
|
|
total = total * radix + val;
|
|
}
|
|
if (this.state.pos === start || len != null && this.state.pos - start !== len) return null;
|
|
|
|
return total;
|
|
};
|
|
|
|
Tokenizer.prototype.readRadixNumber = function readRadixNumber(radix) {
|
|
this.state.pos += 2; // 0x
|
|
var val = this.readInt(radix);
|
|
if (val == null) this.raise(this.state.start + 2, "Expected number in radix " + radix);
|
|
if ((0, _identifier.isIdentifierStart)(this.fullCharCodeAtPos())) this.raise(this.state.pos, "Identifier directly after number");
|
|
return this.finishToken(_types.types.num, val);
|
|
};
|
|
|
|
// Read an integer, octal integer, or floating-point number.
|
|
|
|
Tokenizer.prototype.readNumber = function readNumber(startsWithDot) {
|
|
var start = this.state.pos,
|
|
isFloat = false,
|
|
octal = this.input.charCodeAt(this.state.pos) === 48;
|
|
if (!startsWithDot && this.readInt(10) === null) this.raise(start, "Invalid number");
|
|
var next = this.input.charCodeAt(this.state.pos);
|
|
if (next === 46) {
|
|
// '.'
|
|
++this.state.pos;
|
|
this.readInt(10);
|
|
isFloat = true;
|
|
next = this.input.charCodeAt(this.state.pos);
|
|
}
|
|
if (next === 69 || next === 101) {
|
|
// 'eE'
|
|
next = this.input.charCodeAt(++this.state.pos);
|
|
if (next === 43 || next === 45) ++this.state.pos; // '+-'
|
|
if (this.readInt(10) === null) this.raise(start, "Invalid number");
|
|
isFloat = true;
|
|
}
|
|
if ((0, _identifier.isIdentifierStart)(this.fullCharCodeAtPos())) this.raise(this.state.pos, "Identifier directly after number");
|
|
|
|
var str = this.input.slice(start, this.state.pos),
|
|
val = void 0;
|
|
if (isFloat) {
|
|
val = parseFloat(str);
|
|
} else if (!octal || str.length === 1) {
|
|
val = parseInt(str, 10);
|
|
} else if (/[89]/.test(str) || this.state.strict) {
|
|
this.raise(start, "Invalid number");
|
|
} else {
|
|
val = parseInt(str, 8);
|
|
}
|
|
return this.finishToken(_types.types.num, val);
|
|
};
|
|
|
|
// Read a string value, interpreting backslash-escapes.
|
|
|
|
Tokenizer.prototype.readCodePoint = function readCodePoint() {
|
|
var ch = this.input.charCodeAt(this.state.pos),
|
|
code = void 0;
|
|
|
|
if (ch === 123) {
|
|
var codePos = ++this.state.pos;
|
|
code = this.readHexChar(this.input.indexOf("}", this.state.pos) - this.state.pos);
|
|
++this.state.pos;
|
|
if (code > 0x10FFFF) this.raise(codePos, "Code point out of bounds");
|
|
} else {
|
|
code = this.readHexChar(4);
|
|
}
|
|
return code;
|
|
};
|
|
|
|
Tokenizer.prototype.readString = function readString(quote) {
|
|
var out = "",
|
|
chunkStart = ++this.state.pos;
|
|
for (;;) {
|
|
if (this.state.pos >= this.input.length) this.raise(this.state.start, "Unterminated string constant");
|
|
var ch = this.input.charCodeAt(this.state.pos);
|
|
if (ch === quote) break;
|
|
if (ch === 92) {
|
|
// '\'
|
|
out += this.input.slice(chunkStart, this.state.pos);
|
|
out += this.readEscapedChar(false);
|
|
chunkStart = this.state.pos;
|
|
} else {
|
|
if ((0, _whitespace.isNewLine)(ch)) this.raise(this.state.start, "Unterminated string constant");
|
|
++this.state.pos;
|
|
}
|
|
}
|
|
out += this.input.slice(chunkStart, this.state.pos++);
|
|
return this.finishToken(_types.types.string, out);
|
|
};
|
|
|
|
// Reads template string tokens.
|
|
|
|
Tokenizer.prototype.readTmplToken = function readTmplToken() {
|
|
var out = "",
|
|
chunkStart = this.state.pos;
|
|
for (;;) {
|
|
if (this.state.pos >= this.input.length) this.raise(this.state.start, "Unterminated template");
|
|
var ch = this.input.charCodeAt(this.state.pos);
|
|
if (ch === 96 || ch === 36 && this.input.charCodeAt(this.state.pos + 1) === 123) {
|
|
// '`', '${'
|
|
if (this.state.pos === this.state.start && this.match(_types.types.template)) {
|
|
if (ch === 36) {
|
|
this.state.pos += 2;
|
|
return this.finishToken(_types.types.dollarBraceL);
|
|
} else {
|
|
++this.state.pos;
|
|
return this.finishToken(_types.types.backQuote);
|
|
}
|
|
}
|
|
out += this.input.slice(chunkStart, this.state.pos);
|
|
return this.finishToken(_types.types.template, out);
|
|
}
|
|
if (ch === 92) {
|
|
// '\'
|
|
out += this.input.slice(chunkStart, this.state.pos);
|
|
out += this.readEscapedChar(true);
|
|
chunkStart = this.state.pos;
|
|
} else if ((0, _whitespace.isNewLine)(ch)) {
|
|
out += this.input.slice(chunkStart, this.state.pos);
|
|
++this.state.pos;
|
|
switch (ch) {
|
|
case 13:
|
|
if (this.input.charCodeAt(this.state.pos) === 10) ++this.state.pos;
|
|
case 10:
|
|
out += "\n";
|
|
break;
|
|
default:
|
|
out += String.fromCharCode(ch);
|
|
break;
|
|
}
|
|
++this.state.curLine;
|
|
this.state.lineStart = this.state.pos;
|
|
chunkStart = this.state.pos;
|
|
} else {
|
|
++this.state.pos;
|
|
}
|
|
}
|
|
};
|
|
|
|
// Used to read escaped characters
|
|
|
|
Tokenizer.prototype.readEscapedChar = function readEscapedChar(inTemplate) {
|
|
var ch = this.input.charCodeAt(++this.state.pos);
|
|
++this.state.pos;
|
|
switch (ch) {
|
|
case 110:
|
|
return "\n"; // 'n' -> '\n'
|
|
case 114:
|
|
return "\r"; // 'r' -> '\r'
|
|
case 120:
|
|
return String.fromCharCode(this.readHexChar(2)); // 'x'
|
|
case 117:
|
|
return codePointToString(this.readCodePoint()); // 'u'
|
|
case 116:
|
|
return "\t"; // 't' -> '\t'
|
|
case 98:
|
|
return "\b"; // 'b' -> '\b'
|
|
case 118:
|
|
return "\u000b"; // 'v' -> '\u000b'
|
|
case 102:
|
|
return "\f"; // 'f' -> '\f'
|
|
case 13:
|
|
if (this.input.charCodeAt(this.state.pos) === 10) ++this.state.pos; // '\r\n'
|
|
case 10:
|
|
// ' \n'
|
|
this.state.lineStart = this.state.pos;
|
|
++this.state.curLine;
|
|
return "";
|
|
default:
|
|
if (ch >= 48 && ch <= 55) {
|
|
var octalStr = this.input.substr(this.state.pos - 1, 3).match(/^[0-7]+/)[0];
|
|
var octal = parseInt(octalStr, 8);
|
|
if (octal > 255) {
|
|
octalStr = octalStr.slice(0, -1);
|
|
octal = parseInt(octalStr, 8);
|
|
}
|
|
if (octal > 0) {
|
|
if (!this.state.containsOctal) {
|
|
this.state.containsOctal = true;
|
|
this.state.octalPosition = this.state.pos - 2;
|
|
}
|
|
if (this.state.strict || inTemplate) {
|
|
this.raise(this.state.pos - 2, "Octal literal in strict mode");
|
|
}
|
|
}
|
|
this.state.pos += octalStr.length - 1;
|
|
return String.fromCharCode(octal);
|
|
}
|
|
return String.fromCharCode(ch);
|
|
}
|
|
};
|
|
|
|
// Used to read character escape sequences ('\x', '\u', '\U').
|
|
|
|
Tokenizer.prototype.readHexChar = function readHexChar(len) {
|
|
var codePos = this.state.pos;
|
|
var n = this.readInt(16, len);
|
|
if (n === null) this.raise(codePos, "Bad character escape sequence");
|
|
return n;
|
|
};
|
|
|
|
// Read an identifier, and return it as a string. Sets `this.state.containsEsc`
|
|
// to whether the word contained a '\u' escape.
|
|
//
|
|
// Incrementally adds only escaped chars, adding other chunks as-is
|
|
// as a micro-optimization.
|
|
|
|
Tokenizer.prototype.readWord1 = function readWord1() {
|
|
this.state.containsEsc = false;
|
|
var word = "",
|
|
first = true,
|
|
chunkStart = this.state.pos;
|
|
while (this.state.pos < this.input.length) {
|
|
var ch = this.fullCharCodeAtPos();
|
|
if ((0, _identifier.isIdentifierChar)(ch)) {
|
|
this.state.pos += ch <= 0xffff ? 1 : 2;
|
|
} else if (ch === 92) {
|
|
// "\"
|
|
this.state.containsEsc = true;
|
|
|
|
word += this.input.slice(chunkStart, this.state.pos);
|
|
var escStart = this.state.pos;
|
|
|
|
if (this.input.charCodeAt(++this.state.pos) !== 117) {
|
|
// "u"
|
|
this.raise(this.state.pos, "Expecting Unicode escape sequence \\uXXXX");
|
|
}
|
|
|
|
++this.state.pos;
|
|
var esc = this.readCodePoint();
|
|
if (!(first ? _identifier.isIdentifierStart : _identifier.isIdentifierChar)(esc, true)) {
|
|
this.raise(escStart, "Invalid Unicode escape");
|
|
}
|
|
|
|
word += codePointToString(esc);
|
|
chunkStart = this.state.pos;
|
|
} else {
|
|
break;
|
|
}
|
|
first = false;
|
|
}
|
|
return word + this.input.slice(chunkStart, this.state.pos);
|
|
};
|
|
|
|
// Read an identifier or keyword token. Will check for reserved
|
|
// words when necessary.
|
|
|
|
Tokenizer.prototype.readWord = function readWord() {
|
|
var word = this.readWord1();
|
|
var type = _types.types.name;
|
|
if (!this.state.containsEsc && this.isKeyword(word)) {
|
|
type = _types.keywords[word];
|
|
}
|
|
return this.finishToken(type, word);
|
|
};
|
|
|
|
Tokenizer.prototype.braceIsBlock = function braceIsBlock(prevType) {
|
|
if (prevType === _types.types.colon) {
|
|
var parent = this.curContext();
|
|
if (parent === _context.types.braceStatement || parent === _context.types.braceExpression) {
|
|
return !parent.isExpr;
|
|
}
|
|
}
|
|
|
|
if (prevType === _types.types._return) {
|
|
return _whitespace.lineBreak.test(this.input.slice(this.state.lastTokEnd, this.state.start));
|
|
}
|
|
|
|
if (prevType === _types.types._else || prevType === _types.types.semi || prevType === _types.types.eof || prevType === _types.types.parenR) {
|
|
return true;
|
|
}
|
|
|
|
if (prevType === _types.types.braceL) {
|
|
return this.curContext() === _context.types.braceStatement;
|
|
}
|
|
|
|
return !this.state.exprAllowed;
|
|
};
|
|
|
|
Tokenizer.prototype.updateContext = function updateContext(prevType) {
|
|
var update = void 0,
|
|
type = this.state.type;
|
|
if (type.keyword && prevType === _types.types.dot) {
|
|
this.state.exprAllowed = false;
|
|
} else if (update = type.updateContext) {
|
|
update.call(this, prevType);
|
|
} else {
|
|
this.state.exprAllowed = type.beforeExpr;
|
|
}
|
|
};
|
|
|
|
return Tokenizer;
|
|
}();
|
|
|
|
exports.default = Tokenizer; |