Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 | 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 110798x 110798x 4954x 5019x 2x 2x 2x 1x 1x 1x 1x 1x 1x 2x 4952x 5019x 4952x 5019x 4787x 4787x 4787x 4787x 4787x 4787x 4787x 4787x 4787x 4787x 5019x 165x 165x 165x 4952x 4952x 4952x 4952x 4952x 5019x 44x 44x 44x 44x 44x 44x 44x 44x 44x 44x 44x 5019x 5019x 5019x 81989x 81989x 5019x 5019x 5019x 5019x 5019x 5019x 5x 5x 5019x 5019x 5019x 5019x 5019x 5019x 229136x 84448x 84448x 84448x 144688x 229136x 1x 1x 144687x 144687x 144687x 5019x 5019x 5019x 547326x 547326x 485111x 485111x 485111x 62215x 62215x 62215x 5019x 5019x 5019x 5019x 5019x 5019x 113356x 113356x 9252x 9252x 9252x 5019x 5019x 99826x 33122x 33122x 99826x 5019x 5019x 5019x 5019x 5019x 5019x 101792x 101792x 101792x 101792x 5019x 5019x 5019x 1936x 1936x 1936x 1936x 1936x 1936x 1935x 1936x 1936x 1936x 8131x 8131x 8131x 8131x 8131x 1935x 1935x 1935x 1936x 2x 2x 1933x 1933x 1933x 5019x 5019x 5019x 52834x 3x 3x 52831x 52831x 52831x 52831x 52834x 52828x 52828x 52828x 3x 3x 3x 3x 5019x 5019x 3553x 2x 2x 3551x 3551x 3551x 5019x 5019x 10600x 10600x 10600x 5019x 5019x 5019x 5019x 5019x 5019x 5019x 39942x 39942x 39942x 39942x 39942x 39942x 39942x 39942x 39942x 39942x 39942x 39942x 39942x 39942x 39942x 39942x 39942x 39942x 39942x 39942x 39942x 5019x 2x 2x 2x 2x 2x 2x 5019x 5019x 5019x 2x 2x 2x 2x 2x 2x 2x 2x | // @ts-expect-error acorn type definitions are borked in the release we use
import { isIdentifierStart, isIdentifierChar } from 'acorn';
import fragment from './state/fragment.js';
import { regex_whitespace } from '../patterns.js';
import { reserved } from './utils/names.js';
import full_char_code_at from './utils/full_char_code_at.js';
import * as e from '../../errors.js';
import { create_fragment } from './utils/create.js';
import read_options from './read/options.js';
const regex_position_indicator = / \(\d+:\d+\)$/;
const regex_lang_attribute =
/<!--[^]*?-->|<script\s+(?:[^>]*|(?:[^=>'"/]+=(?:"[^"]*"|'[^']*'|[^>\s]+)\s+)*)lang=(["'])?([^"' >]+)\1[^>]*>/g;
export class Parser {
/**
* @readonly
* @type {string}
*/
template;
/** */
index = 0;
/** Whether we're parsing in TypeScript mode */
ts = false;
/** @type {import('#compiler').TemplateNode[]} */
stack = [];
/** @type {import('#compiler').Fragment[]} */
fragments = [];
/** @type {import('#compiler').Root} */
root;
/** @type {Record<string, boolean>} */
meta_tags = {};
/** @type {LastAutoClosedTag | undefined} */
last_auto_closed_tag;
/** @param {string} template */
constructor(template) {
if (typeof template !== 'string') {
throw new TypeError('Template must be a string');
}
this.template = template.trimEnd();
let match_lang;
do match_lang = regex_lang_attribute.exec(template);
while (match_lang && match_lang[0][1] !== 's'); // ensure it starts with '<s' to match script tags
regex_lang_attribute.lastIndex = 0; // reset matched index to pass tests - otherwise declare the regex inside the constructor
this.ts = match_lang?.[2] === 'ts';
this.root = {
css: null,
js: [],
// @ts-ignore
start: null,
// @ts-ignore
end: null,
type: 'Root',
fragment: create_fragment(),
options: null,
metadata: {
ts: this.ts
}
};
this.stack.push(this.root);
this.fragments.push(this.root.fragment);
/** @type {ParserState} */
let state = fragment;
while (this.index < this.template.length) {
state = state(this) || fragment;
}
if (this.stack.length > 1) {
const current = this.current();
if (current.type === 'RegularElement') {
current.end = current.start + 1;
e.element_unclosed(current, current.name);
} else {
current.end = current.start + 1;
e.block_unclosed(current);
}
}
if (state !== fragment) {
e.unexpected_eof(this.index);
}
if (this.root.fragment.nodes.length) {
let start = /** @type {number} */ (this.root.fragment.nodes[0].start);
while (regex_whitespace.test(template[start])) start += 1;
let end = /** @type {number} */ (
this.root.fragment.nodes[this.root.fragment.nodes.length - 1].end
);
while (regex_whitespace.test(template[end - 1])) end -= 1;
this.root.start = start;
this.root.end = end;
} else {
// @ts-ignore
this.root.start = this.root.end = null;
}
const options_index = this.root.fragment.nodes.findIndex(
/** @param {any} thing */
(thing) => thing.type === 'SvelteOptions'
);
if (options_index !== -1) {
const options = /** @type {import('#compiler').SvelteOptionsRaw} */ (
this.root.fragment.nodes[options_index]
);
this.root.fragment.nodes.splice(options_index, 1);
this.root.options = read_options(options);
// We need this for the old AST format
Object.defineProperty(this.root.options, '__raw__', {
value: options,
enumerable: false
});
}
}
current() {
return this.stack[this.stack.length - 1];
}
/**
* @param {any} err
* @returns {never}
*/
acorn_error(err) {
e.js_parse_error(err.pos, err.message.replace(regex_position_indicator, ''));
}
/**
* @param {string} str
* @param {boolean} required
*/
eat(str, required = false) {
if (this.match(str)) {
this.index += str.length;
return true;
}
if (required) {
e.expected_token(this.index, str);
}
return false;
}
/** @param {string} str */
match(str) {
const length = str.length;
if (length === 1) {
// more performant than slicing
return this.template[this.index] === str;
}
return this.template.slice(this.index, this.index + length) === str;
}
/**
* Match a regex at the current index
* @param {RegExp} pattern Should have a ^ anchor at the start so the regex doesn't search past the beginning, resulting in worse performance
*/
match_regex(pattern) {
const match = pattern.exec(this.template.slice(this.index));
if (!match || match.index !== 0) return null;
return match[0];
}
allow_whitespace() {
while (this.index < this.template.length && regex_whitespace.test(this.template[this.index])) {
this.index++;
}
}
/**
* Search for a regex starting at the current index and return the result if it matches
* @param {RegExp} pattern Should have a ^ anchor at the start so the regex doesn't search past the beginning, resulting in worse performance
*/
read(pattern) {
const result = this.match_regex(pattern);
if (result) this.index += result.length;
return result;
}
/** @param {any} allow_reserved */
read_identifier(allow_reserved = false) {
const start = this.index;
let i = this.index;
const code = full_char_code_at(this.template, i);
if (!isIdentifierStart(code, true)) return null;
i += code <= 0xffff ? 1 : 2;
while (i < this.template.length) {
const code = full_char_code_at(this.template, i);
if (!isIdentifierChar(code, true)) break;
i += code <= 0xffff ? 1 : 2;
}
const identifier = this.template.slice(this.index, (this.index = i));
if (!allow_reserved && reserved.includes(identifier)) {
e.unexpected_reserved_word(start, identifier);
}
return identifier;
}
/** @param {RegExp} pattern */
read_until(pattern) {
if (this.index >= this.template.length) {
e.unexpected_eof(this.template.length);
}
const start = this.index;
const match = pattern.exec(this.template.slice(start));
if (match) {
this.index = start + match.index;
return this.template.slice(start, this.index);
}
this.index = this.template.length;
return this.template.slice(start);
}
require_whitespace() {
if (!regex_whitespace.test(this.template[this.index])) {
e.expected_whitespace(this.index);
}
this.allow_whitespace();
}
pop() {
this.fragments.pop();
return this.stack.pop();
}
/**
* @template T
* @param {Omit<T, 'prev' | 'parent'>} node
* @returns {T}
*/
append(node) {
const current = this.current();
const fragment = this.fragments.at(-1);
Object.defineProperties(node, {
prev: {
enumerable: false,
value: fragment?.nodes.at(-1) ?? null
},
parent: {
enumerable: false,
configurable: true,
value: current
}
});
// @ts-expect-error
fragment.nodes.push(node);
// @ts-expect-error
return node;
}
}
/**
* @param {string} template
* @returns {import('#compiler').Root}
*/
export function parse(template) {
const parser = new Parser(template);
return parser.root;
}
/** @typedef {(parser: Parser) => ParserState | void} ParserState */
/** @typedef {Object} LastAutoClosedTag
* @property {string} tag
* @property {string} reason
* @property {number} depth
*/
|