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fix: default values in object destructuring ()

Browse Source 
* fix: enhance string/expression length check and fix closing character issues

* docs: add documentation for unterminated_string_constant error

* test: add tests for object destructuring with default values in "each" blocks

* Update .changeset/clean-planets-rush.md

* refactor: clean up unnecessary comments and whitespace

* fix: resolve formatting issues

* simplify

* tweak

* regenerate

---------

Co-authored-by: Rich Harris <rich.harris@vercel.com>
pull/14397/merge
Caique Torres 3 months ago committed by GitHub
parent 4aadb34c02
commit 48e3db21c1
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
9 changed files with 1806 additions and 25 deletions

5
.changeset/clean-planets-rush.md
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@ -0,0 +1,5 @@
---
'svelte': patch
---
fix: handle default values in object destructuring within "each" blocks when using characters like "}" and "]"

6
documentation/docs/98-reference/.generated/compile-errors.md
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@ -1012,6 +1012,12 @@ Unexpected end of input
'%word%' is a reserved word in JavaScript and cannot be used here
```
### unterminated_string_constant
```
Unterminated string constant
```
### void_element_invalid_content
```

4
packages/svelte/messages/compile-errors/template.md
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@ -418,6 +418,10 @@ See https://html.spec.whatwg.org/multipage/custom-elements.html#valid-custom-ele
> '%word%' is a reserved word in JavaScript and cannot be used here
## unterminated_string_constant
> Unterminated string constant
## void_element_invalid_content
> Void elements cannot have children or closing tags

9
packages/svelte/src/compiler/errors.js
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@ -1574,6 +1574,15 @@ export function unexpected_reserved_word(node, word) {
e(node, "unexpected_reserved_word", `'${word}' is a reserved word in JavaScript and cannot be used here\nhttps://svelte.dev/e/unexpected_reserved_word`);
}
/**
* Unterminated string constant
* @param {null | number | NodeLike} node
* @returns {never}
*/
export function unterminated_string_constant(node) {
e(node, "unterminated_string_constant", `Unterminated string constant\nhttps://svelte.dev/e/unterminated_string_constant`);
}
/**
* Void elements cannot have children or closing tags
* @param {null | number | NodeLike} node

95
packages/svelte/src/compiler/phases/1-parse/read/context.js
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@ -37,33 +37,11 @@ export default function read_pattern(parser) {
e.expected_pattern(i);
}
/** @type {string[]} */
const bracket_stack = [];
while (i < parser.template.length) {
const char = parser.template[i];
if (is_bracket_open(char)) {
bracket_stack.push(char);
} else if (is_bracket_close(char)) {
const popped = /** @type {string} */ (bracket_stack.pop());
const expected = /** @type {string} */ (get_bracket_close(popped));
if (char !== expected) {
e.expected_token(i, expected);
}
if (bracket_stack.length === 0) {
i += 1;
break;
}
}
i += 1;
}
i = match_bracket(parser, start);
parser.index = i;
const pattern_string = parser.template.slice(start, i);
try {
// the length of the `space_with_newline` has to be start - 1
// because we added a `(` in front of the pattern_string,
@ -93,6 +71,75 @@ export default function read_pattern(parser) {
}
}
/**
* @param {Parser} parser
* @param {number} start
*/
function match_bracket(parser, start) {
const bracket_stack = [];
let i = start;
while (i < parser.template.length) {
let char = parser.template[i++];
if (char === "'" || char === '"' || char === '`') {
i = match_quote(parser, i, char);
continue;
}
if (is_bracket_open(char)) {
bracket_stack.push(char);
} else if (is_bracket_close(char)) {
const popped = /** @type {string} */ (bracket_stack.pop());
const expected = /** @type {string} */ (get_bracket_close(popped));
if (char !== expected) {
e.expected_token(i - 1, expected);
}
if (bracket_stack.length === 0) {
return i;
}
}
}
e.unexpected_eof(parser.template.length);
}
/**
* @param {Parser} parser
* @param {number} start
* @param {string} quote
*/
function match_quote(parser, start, quote) {
let is_escaped = false;
let i = start;
while (i < parser.template.length) {
const char = parser.template[i++];
if (is_escaped) {
is_escaped = false;
continue;
}
if (char === quote) {
return i;
}
if (char === '\\') {
is_escaped = true;
}
if (quote === '`' && char === '$' && parser.template[i] === '{') {
i = match_bracket(parser, i);
}
}
e.unterminated_string_constant(start);
}
/**
* @param {Parser} parser
* @returns {any}

9
packages/svelte/tests/parser-modern/samples/each-block-object-pattern-special-characters/input.svelte
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@ -0,0 +1,9 @@
{#each x as { y = 'z' }}{/each}
{#each x as { y = '{' }}{/each}
{#each x as { y = ']' }}{/each}
{#each x as { y = `${`"`}` }}{/each}
{#each x as { y = `${`John`}` }}{/each}

826
packages/svelte/tests/parser-modern/samples/each-block-object-pattern-special-characters/output.json
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@ -0,0 +1,826 @@
{
"css": null,
"js": [],
"start": 0,
"end": 176,
"type": "Root",
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"start": 7,
"end": 8,
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"line": 1,
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},
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"column": 8
}
},
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"loc": {
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},
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}
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"end": 21,
"loc": {
"start": {
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},
"end": {
"line": 1,
"column": 21
}
},
"value": "z",
"raw": "'z'"
}
}
}
]
}
},
{
"type": "Text",
"start": 31,
"end": 33,
"raw": "\n\n",
"data": "\n\n"
},
{
"type": "EachBlock",
"start": 33,
"end": 64,
"expression": {
"type": "Identifier",
"start": 40,
"end": 41,
"loc": {
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"line": 3,
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},
"end": {
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"column": 8
}
},
"name": "x"
},
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"nodes": []
},
"context": {
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"end": 56,
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},
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}
},
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{
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"loc": {
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},
"end": {
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}
},
"method": false,
"shorthand": true,
"computed": false,
"key": {
"type": "Identifier",
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"end": 48,
"loc": {
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"column": 15
},
"end": {
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}
},
"name": "y"
},
"kind": "init",
"value": {
"type": "AssignmentPattern",
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"end": 54,
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}
},
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"end": 48,
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},
"end": {
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}
},
"name": "y"
},
"right": {
"type": "Literal",
"start": 51,
"end": 54,
"loc": {
"start": {
"line": 3,
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},
"end": {
"line": 3,
"column": 22
}
},
"value": "{",
"raw": "'{'"
}
}
}
]
}
},
{
"type": "Text",
"start": 64,
"end": 66,
"raw": "\n\n",
"data": "\n\n"
},
{
"type": "EachBlock",
"start": 66,
"end": 97,
"expression": {
"type": "Identifier",
"start": 73,
"end": 74,
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},
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}
},
"name": "x"
},
"body": {
"type": "Fragment",
"nodes": []
},
"context": {
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"end": 89,
"loc": {
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},
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}
},
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"loc": {
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},
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}
},
"method": false,
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"computed": false,
"key": {
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},
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},
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"loc": {
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},
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}
},
"name": "y"
},
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"loc": {
"start": {
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},
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}
},
"value": "]",
"raw": "']'"
}
}
}
]
}
},
{
"type": "Text",
"start": 97,
"end": 99,
"raw": "\n\n",
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},
{
"type": "EachBlock",
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},
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},
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]
},
"options": null
}

8
packages/svelte/tests/parser-modern/samples/each-block-object-pattern/input.svelte
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@ -1,3 +1,11 @@
{#each people as { name, cool = true }}
<p>{name} is {cool ? 'cool' : 'not cool'}</p>
{/each}
{#each people as { name = `Jane ${"Doe"}`, cool = true }}
<p>{name} is {cool ? 'cool' : 'not cool'}</p>
{/each}
{#each people as { name = (() => { return `Jane ${"Doe"}`; })(), cool = true }}
<p>{name} is {cool ? 'cool' : 'not cool'}</p>
{/each}

869
packages/svelte/tests/parser-modern/samples/each-block-object-pattern/output.json
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@ -2,7 +2,7 @@
"css": null,
"js": [],
"start": 0,
"end": 94,
"end": 344,
"type": "Root",
"fragment": {
"type": "Fragment",
@ -307,6 +307,873 @@
}
]
}
},
{
"type": "Text",
"start": 94,
"end": 96,
"raw": "\n\n",
"data": "\n\n"
},
{
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},
{
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"name": "p",
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},
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"name": "name"
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},
"end": {
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}
},
"name": "cool"
},
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"loc": {
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},
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},
"value": "cool",
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"loc": {
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},
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"value": "not cool",
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}
}
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}
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"raw": "\n",
"data": "\n"
}
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},
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}
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},
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}
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"method": false,
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"computed": false,
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"name": "name"
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