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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 | 2x 2x 2x 2x 2x 2x 2x 2x 2x 3253x 872x 872x 872x 872x 3253x 3253x 25x 25x 3228x 3228x 3228x 2x 2x 2x 2x 2x 2x 2x 15218x 15218x 15218x 15218x 2x 2x 2x 2x 2x 2x 2x 16206x 16206x 16206x 15760x 16206x 16206x 2x 2x 2x 2x 2x 2x 2x 12013x 12013x 2x 2x 2x 2x 2x 2x 2x 2x 29254x 29254x 27008x 27008x 29254x 29254x 1245x 2224x 80x 2224x 2144x 2144x 2224x 1245x 1245x 29254x 29254x 445x 1174x 1174x 445x 445x 29254x 29254x 129x 129x 29254x 29254x 351x 351x 29254x 29254x 29254x 29254x 2x 2x 2x 2x 2x 2x 2x 164x 164x 164x 164x 164x 164x 164x 164x 164x 164x 216x 216x 176x 176x 216x 216x 10x 216x 206x 206x 164x 164x 2x 2x 2x 2x 2x 164x 164x 164x 164x 164x 164x 164x 2x 2x 2x 2x 2x 2x 2x 2x 79x 79x 79x 63x 63x 79x 79x 12x 20x 20x 20x 20x 12x 12x 79x 79x 4x 8x 8x 4x 4x 79x 79x 79x 79x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 1247x 1247x 1247x 1247x 1247x 1247x 1247x 1247x 2x 2x 2x 2x 2x 2x 2x 2x 2x 1991x 1991x 1991x 1991x 1398x 1398x 1398x 1398x 1398x 1398x 1398x 1398x 1991x 1991x 343x 577x 27x 27x 6x 6x 6x 26x 20x 14x 20x 6x 6x 20x 26x 6x 27x 27x 27x 27x 27x 27x 27x 27x 27x 27x 27x 577x 550x 550x 550x 550x 550x 550x 550x 550x 550x 550x 550x 577x 343x 343x 1991x 1991x 92x 199x 199x 192x 16x 16x 16x 16x 16x 16x 16x 16x 16x 16x 16x 16x 16x 192x 176x 176x 176x 176x 176x 176x 176x 176x 176x 176x 192x 199x 199x 199x 1991x 1991x 158x 158x 48x 48x 18x 18x 158x 158x 158x 156x 156x 156x 156x 156x 156x 156x 158x 2x 2x 158x 158x 158x 1991x 1991x 1991x 1991x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 1425x 1425x 1425x 1425x 1425x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 1013x 1013x 1013x 1013x 233x 1013x 780x 780x 233x 1002x 233x 1013x 7x 7x 226x 226x 226x 2x 2x 2x 2x 2x 2x 2x 446x 446x 2x 2x 2x 2x 2x 2x 2757x 2757x 39x 39x 2757x 2757x 164x 271x 271x 271x 271x 271x 164x 164x 2757x 2757x 2757x 2757x 26x 26x 2757x 2757x 180x 180x 177x 285x 285x 285x 285x 177x 180x 180x 2757x 2757x 2x 2x 2x 2x 2x 2757x 2757x 93x 93x 92x 92x 93x 93x 2757x 2757x 191x 308x 308x 308x 308x 308x 308x 308x 191x 191x 2757x 2757x 2757x 5x 5x 2757x 2757x 2757x 1x 1x 2757x 2757x 2056x 2757x 2757x | import { walk } from 'zimmerframe';
import * as b from '../utils/builders.js';
/**
* Gets the left-most identifier of a member expression or identifier.
* @param {import('estree').MemberExpression | import('estree').Identifier} expression
* @returns {import('estree').Identifier | null}
*/
export function object(expression) {
while (expression.type === 'MemberExpression') {
expression = /** @type {import('estree').MemberExpression | import('estree').Identifier} */ (
expression.object
);
}
if (expression.type !== 'Identifier') {
return null;
}
return expression;
}
/**
* Returns true if the attribute contains a single static text node.
* @param {import('#compiler').Attribute} attribute
* @returns {attribute is import('#compiler').Attribute & { value: [import('#compiler').Text] }}
*/
export function is_text_attribute(attribute) {
return (
attribute.value !== true && attribute.value.length === 1 && attribute.value[0].type === 'Text'
);
}
/**
* Returns true if the attribute contains a single expression node.
* @param {import('#compiler').Attribute} attribute
* @returns {attribute is import('#compiler').Attribute & { value: [import('#compiler').ExpressionTag] }}
*/
export function is_expression_attribute(attribute) {
return (
attribute.value !== true &&
attribute.value.length === 1 &&
attribute.value[0].type === 'ExpressionTag'
);
}
/**
* Returns true if the attribute starts with `on` and contains a single expression node.
* @param {import('#compiler').Attribute} attribute
* @returns {attribute is import('#compiler').Attribute & { value: [import('#compiler').ExpressionTag] }}
*/
export function is_event_attribute(attribute) {
return is_expression_attribute(attribute) && attribute.name.startsWith('on');
}
/**
* Extracts all identifiers from a pattern.
* @param {import('estree').Pattern} param
* @param {import('estree').Identifier[]} [nodes]
* @returns {import('estree').Identifier[]}
*/
export function extract_identifiers(param, nodes = []) {
switch (param.type) {
case 'Identifier':
nodes.push(param);
break;
case 'ObjectPattern':
for (const prop of param.properties) {
if (prop.type === 'RestElement') {
extract_identifiers(prop.argument, nodes);
} else {
extract_identifiers(prop.value, nodes);
}
}
break;
case 'ArrayPattern':
for (const element of param.elements) {
if (element) extract_identifiers(element, nodes);
}
break;
case 'RestElement':
extract_identifiers(param.argument, nodes);
break;
case 'AssignmentPattern':
extract_identifiers(param.left, nodes);
break;
}
return nodes;
}
/**
* Extracts all identifiers and a stringified keypath from an expression.
* @param {import('estree').Expression} expr
* @returns {[keypath: string, ids: import('estree').Identifier[]]}
*/
export function extract_all_identifiers_from_expression(expr) {
/** @type {import('estree').Identifier[]} */
let nodes = [];
/** @type {string[]} */
let keypath = [];
walk(
expr,
{},
{
Identifier(node, { path }) {
const parent = path.at(-1);
if (parent?.type !== 'MemberExpression' || parent.property !== node || parent.computed) {
nodes.push(node);
}
if (parent?.type === 'MemberExpression' && parent.computed && parent.property === node) {
keypath.push(`[${node.name}]`);
} else {
keypath.push(node.name);
}
},
Literal(node, { path }) {
const value = typeof node.value === 'string' ? `"${node.value}"` : String(node.value);
const parent = path.at(-1);
if (parent?.type === 'MemberExpression' && parent.computed && parent.property === node) {
keypath.push(`[${value}]`);
} else {
keypath.push(value);
}
},
ThisExpression(_, { next }) {
keypath.push('this');
next();
}
}
);
return [keypath.join('.'), nodes];
}
/**
* Extracts all leaf identifiers from a destructuring expression.
* @param {import('estree').Identifier | import('estree').ObjectExpression | import('estree').ArrayExpression} node
* @param {import('estree').Identifier[]} [nodes]
* @returns
*/
export function extract_identifiers_from_destructuring(node, nodes = []) {
// TODO This isn't complete, but it should be enough for our purposes
switch (node.type) {
case 'Identifier':
nodes.push(node);
break;
case 'ObjectExpression':
for (const prop of node.properties) {
if (prop.type === 'Property') {
extract_identifiers_from_destructuring(/** @type {any} */ (prop.value), nodes);
} else {
extract_identifiers_from_destructuring(/** @type {any} */ (prop.argument), nodes);
}
}
break;
case 'ArrayExpression':
for (const element of node.elements) {
if (element) extract_identifiers_from_destructuring(/** @type {any} */ (element), nodes);
}
break;
}
return nodes;
}
/**
* Represents the path of a destructured assignment from either a declaration
* or assignment expression. For example, given `const { foo: { bar: baz } } = quux`,
* the path of `baz` is `foo.bar`
* @typedef {Object} DestructuredAssignment
* @property {import('estree').Identifier | import('estree').MemberExpression} node The node the destructuring path end in. Can be a member expression only for assignment expressions
* @property {boolean} is_rest `true` if this is a `...rest` destructuring
* @property {boolean} has_default_value `true` if this has a fallback value like `const { foo = 'bar } = ..`
* @property {(expression: import('estree').Expression) => import('estree').Identifier | import('estree').MemberExpression | import('estree').CallExpression | import('estree').AwaitExpression} expression Returns an expression which walks the path starting at the given expression.
* This will be a call expression if a rest element or default is involved — e.g. `const { foo: { bar: baz = 42 }, ...rest } = quux` — since we can't represent `baz` or `rest` purely as a path
* Will be an await expression in case of an async default value (`const { foo = await bar } = ...`)
* @property {(expression: import('estree').Expression) => import('estree').Identifier | import('estree').MemberExpression | import('estree').CallExpression | import('estree').AwaitExpression} update_expression Like `expression` but without default values.
*/
/**
* Extracts all destructured assignments from a pattern.
* @param {import('estree').Node} param
* @returns {DestructuredAssignment[]}
*/
export function extract_paths(param) {
return _extract_paths(
[],
param,
(node) => /** @type {import('estree').Identifier | import('estree').MemberExpression} */ (node),
(node) => /** @type {import('estree').Identifier | import('estree').MemberExpression} */ (node),
false
);
}
/**
* @param {DestructuredAssignment[]} assignments
* @param {import('estree').Node} param
* @param {DestructuredAssignment['expression']} expression
* @param {DestructuredAssignment['update_expression']} update_expression
* @param {boolean} has_default_value
* @returns {DestructuredAssignment[]}
*/
function _extract_paths(assignments = [], param, expression, update_expression, has_default_value) {
switch (param.type) {
case 'Identifier':
case 'MemberExpression':
assignments.push({
node: param,
is_rest: false,
has_default_value,
expression,
update_expression
});
break;
case 'ObjectPattern':
for (const prop of param.properties) {
if (prop.type === 'RestElement') {
/** @type {DestructuredAssignment['expression']} */
const rest_expression = (object) => {
/** @type {import('estree').Expression[]} */
const props = [];
for (const p of param.properties) {
if (p.type === 'Property' && p.key.type !== 'PrivateIdentifier') {
if (p.key.type === 'Identifier' && !p.computed) {
props.push(b.literal(p.key.name));
} else {
props.push(p.key);
}
}
}
return b.call('$.exclude_from_object', expression(object), b.array(props));
};
if (prop.argument.type === 'Identifier') {
assignments.push({
node: prop.argument,
is_rest: true,
has_default_value,
expression: rest_expression,
update_expression: rest_expression
});
} else {
_extract_paths(
assignments,
prop.argument,
rest_expression,
rest_expression,
has_default_value
);
}
} else {
/** @type {DestructuredAssignment['expression']} */
const object_expression = (object) =>
b.member(expression(object), prop.key, prop.computed || prop.key.type !== 'Identifier');
_extract_paths(
assignments,
prop.value,
object_expression,
object_expression,
has_default_value
);
}
}
break;
case 'ArrayPattern':
for (let i = 0; i < param.elements.length; i += 1) {
const element = param.elements[i];
if (element) {
if (element.type === 'RestElement') {
/** @type {DestructuredAssignment['expression']} */
const rest_expression = (object) =>
b.call(b.member(expression(object), b.id('slice')), b.literal(i));
if (element.argument.type === 'Identifier') {
assignments.push({
node: element.argument,
is_rest: true,
has_default_value,
expression: rest_expression,
update_expression: rest_expression
});
} else {
_extract_paths(
assignments,
element.argument,
rest_expression,
rest_expression,
has_default_value
);
}
} else {
/** @type {DestructuredAssignment['expression']} */
const array_expression = (object) => b.member(expression(object), b.literal(i), true);
_extract_paths(
assignments,
element,
array_expression,
array_expression,
has_default_value
);
}
}
}
break;
case 'AssignmentPattern': {
/** @type {DestructuredAssignment['expression']} */
const fallback_expression = (object) =>
is_expression_async(param.right)
? b.await(
b.call('$.value_or_fallback_async', expression(object), b.thunk(param.right, true))
)
: b.call('$.value_or_fallback', expression(object), b.thunk(param.right));
if (param.left.type === 'Identifier') {
assignments.push({
node: param.left,
is_rest: false,
has_default_value: true,
expression: fallback_expression,
update_expression
});
} else {
_extract_paths(assignments, param.left, fallback_expression, update_expression, true);
}
break;
}
}
return assignments;
}
/**
* Like `path.at(x)`, but skips over `TSNonNullExpression` and `TSAsExpression` nodes and eases assertions a bit
* by removing the `| undefined` from the resulting type.
*
* @template {import('#compiler').SvelteNode} T
* @param {T[]} path
* @param {number} at
*/
export function get_parent(path, at) {
let node = path.at(at);
// @ts-expect-error
if (node.type === 'TSNonNullExpression' || node.type === 'TSAsExpression') {
return /** @type {T} */ (path.at(at < 0 ? at - 1 : at + 1));
}
return /** @type {T} */ (node);
}
/**
* Returns `true` if the expression is an identifier, a literal, a function expression,
* or a logical expression that only contains simple expressions. Used to determine whether
* something needs to be treated as though accessing it could have side-effects (i.e.
* reading signals prematurely)
* @param {import('estree').Expression} node
* @returns {boolean}
*/
export function is_simple_expression(node) {
if (
node.type === 'Literal' ||
node.type === 'Identifier' ||
node.type === 'ArrowFunctionExpression' ||
node.type === 'FunctionExpression'
) {
return true;
}
if (node.type === 'ConditionalExpression') {
return (
is_simple_expression(node.test) &&
is_simple_expression(node.consequent) &&
is_simple_expression(node.alternate)
);
}
if (node.type === 'BinaryExpression' || node.type === 'LogicalExpression') {
return is_simple_expression(node.left) && is_simple_expression(node.right);
}
return false;
}
/**
* @template {import('estree').SimpleCallExpression | import('estree').MemberExpression} T
* @param {import('estree').ChainExpression & { expression : T } | T} node
* @returns {T}
*/
export function unwrap_optional(node) {
return node.type === 'ChainExpression' ? node.expression : node;
}
/**
* @param {import('estree').Expression | import('estree').Pattern} expression
* @returns {boolean}
*/
export function is_expression_async(expression) {
switch (expression.type) {
case 'AwaitExpression': {
return true;
}
case 'ArrayPattern': {
return expression.elements.some((element) => element && is_expression_async(element));
}
case 'ArrayExpression': {
return expression.elements.some((element) => {
if (!element) {
return false;
} else if (element.type === 'SpreadElement') {
return is_expression_async(element.argument);
} else {
return is_expression_async(element);
}
});
}
case 'AssignmentPattern':
case 'AssignmentExpression':
case 'BinaryExpression':
case 'LogicalExpression': {
return is_expression_async(expression.left) || is_expression_async(expression.right);
}
case 'CallExpression':
case 'NewExpression': {
return (
(expression.callee.type !== 'Super' && is_expression_async(expression.callee)) ||
expression.arguments.some((element) => {
if (element.type === 'SpreadElement') {
return is_expression_async(element.argument);
} else {
return is_expression_async(element);
}
})
);
}
case 'ChainExpression': {
return is_expression_async(expression.expression);
}
case 'ConditionalExpression': {
return (
is_expression_async(expression.test) ||
is_expression_async(expression.alternate) ||
is_expression_async(expression.consequent)
);
}
case 'ImportExpression': {
return is_expression_async(expression.source);
}
case 'MemberExpression': {
return (
(expression.object.type !== 'Super' && is_expression_async(expression.object)) ||
(expression.property.type !== 'PrivateIdentifier' &&
is_expression_async(expression.property))
);
}
case 'ObjectPattern':
case 'ObjectExpression': {
return expression.properties.some((property) => {
if (property.type === 'SpreadElement') {
return is_expression_async(property.argument);
} else if (property.type === 'Property') {
return (
(property.key.type !== 'PrivateIdentifier' && is_expression_async(property.key)) ||
is_expression_async(property.value)
);
}
});
}
case 'RestElement': {
return is_expression_async(expression.argument);
}
case 'SequenceExpression':
case 'TemplateLiteral': {
return expression.expressions.some((subexpression) => is_expression_async(subexpression));
}
case 'TaggedTemplateExpression': {
return is_expression_async(expression.tag) || is_expression_async(expression.quasi);
}
case 'UnaryExpression':
case 'UpdateExpression': {
return is_expression_async(expression.argument);
}
case 'YieldExpression': {
return expression.argument ? is_expression_async(expression.argument) : false;
}
default:
return false;
}
}
|