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then and catch block expect await, optional then block

Browse Source
pull/3734/head
Li Hau Tan 5 years ago
parent dda9a53727
commit a31fea139b
7 changed files with 246 additions and 41 deletions
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92
src/compiler/parse/state/mustache.ts
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@ -163,54 +163,64 @@ export default function mustache(parser: Parser) {
} else if (parser.eat(':then')) {
// TODO DRY out this and the next section
const pending_block = parser.current();
if (pending_block.type === 'PendingBlock') {
pending_block.end = start;
parser.stack.pop();
const await_block = parser.current();
if (!parser.eat('}')) {
parser.require_whitespace();
await_block.value = parser.read_identifier();
parser.allow_whitespace();
parser.eat('}', true);
}
if (pending_block.type !== 'PendingBlock') {
parser.error({
code: `invalid-then-placement`,
message: 'Cannot have an {:then} block outside an {#await ...} block'
});
}
const then_block: TemplateNode = {
start,
end: null,
type: 'ThenBlock',
children: [],
skip: false
};
pending_block.end = start;
parser.stack.pop();
const await_block = parser.current();
await_block.then = then_block;
parser.stack.push(then_block);
if (!parser.eat('}')) {
parser.require_whitespace();
await_block.value = parser.read_identifier();
parser.allow_whitespace();
parser.eat('}', true);
}
} else if (parser.eat(':catch')) {
const then_block = parser.current();
if (then_block.type === 'ThenBlock') {
then_block.end = start;
parser.stack.pop();
const await_block = parser.current();
if (!parser.eat('}')) {
parser.require_whitespace();
await_block.error = parser.read_identifier();
parser.allow_whitespace();
parser.eat('}', true);
}
const then_block: TemplateNode = {
start,
end: null,
type: 'ThenBlock',
children: [],
skip: false
};
await_block.then = then_block;
parser.stack.push(then_block);
} else if (parser.eat(':catch')) {
const block = parser.current();
if (block.type !== 'ThenBlock' && block.type !== 'PendingBlock') {
parser.error({
code: `invalid-catch-placement`,
message: 'Cannot have an {:catch} block outside an {#await ...} block'
});
}
const catch_block: TemplateNode = {
start,
end: null,
type: 'CatchBlock',
children: [],
skip: false
};
block.end = start;
parser.stack.pop();
const await_block = parser.current();
await_block.catch = catch_block;
parser.stack.push(catch_block);
if (!parser.eat('}')) {
parser.require_whitespace();
await_block.error = parser.read_identifier();
parser.allow_whitespace();
parser.eat('}', true);
}
const catch_block: TemplateNode = {
start,
end: null,
type: 'CatchBlock',
children: [],
skip: false
};
await_block.catch = catch_block;
parser.stack.push(catch_block);
} else if (parser.eat('#')) {
// {#if foo}, {#each foo} or {#await foo}
let type;

5
test/parser/samples/await-catch/input.svelte
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@ -0,0 +1,5 @@
{#await thePromise}
<p>loading...</p>
{:catch theError}
<p>oh no! {theError.message}</p>
{/await}

168
test/parser/samples/await-catch/output.json
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@ -0,0 +1,168 @@
{
"html": {
"start": 0,
"end": 99,
"type": "Fragment",
"children": [
{
"start": 0,
"end": 99,
"type": "AwaitBlock",
"expression": {
"type": "Identifier",
"start": 8,
"end": 18,
"loc": {
"start": {
"line": 1,
"column": 8
},
"end": {
"line": 1,
"column": 18
}
},
"name": "thePromise"
},
"value": null,
"error": "theError",
"pending": {
"start": 19,
"end": 39,
"type": "PendingBlock",
"children": [
{
"start": 19,
"end": 21,
"type": "Text",
"raw": "\n\t",
"data": "\n\t"
},
{
"start": 21,
"end": 38,
"type": "Element",
"name": "p",
"attributes": [],
"children": [
{
"start": 24,
"end": 34,
"type": "Text",
"raw": "loading...",
"data": "loading..."
}
]
},
{
"start": 38,
"end": 39,
"type": "Text",
"raw": "\n",
"data": "\n"
}
],
"skip": false
},
"then": {
"start": null,
"end": null,
"type": "ThenBlock",
"children": [],
"skip": true
},
"catch": {
"start": 39,
"end": 91,
"type": "CatchBlock",
"children": [
{
"start": 56,
"end": 58,
"type": "Text",
"raw": "\n\t",
"data": "\n\t"
},
{
"start": 58,
"end": 90,
"type": "Element",
"name": "p",
"attributes": [],
"children": [
{
"start": 61,
"end": 68,
"type": "Text",
"raw": "oh no! ",
"data": "oh no! "
},
{
"start": 68,
"end": 86,
"type": "MustacheTag",
"expression": {
"type": "MemberExpression",
"start": 69,
"end": 85,
"loc": {
"start": {
"line": 4,
"column": 12
},
"end": {
"line": 4,
"column": 28
}
},
"object": {
"type": "Identifier",
"start": 69,
"end": 77,
"loc": {
"start": {
"line": 4,
"column": 12
},
"end": {
"line": 4,
"column": 20
}
},
"name": "theError"
},
"property": {
"type": "Identifier",
"start": 78,
"end": 85,
"loc": {
"start": {
"line": 4,
"column": 21
},
"end": {
"line": 4,
"column": 28
}
},
"name": "message"
},
"computed": false
}
}
]
},
{
"start": 90,
"end": 91,
"type": "Text",
"raw": "\n",
"data": "\n"
}
],
"skip": false
}
}
]
}
}

10
test/parser/samples/error-catch-without-await/error.json
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@ -0,0 +1,10 @@
{
"code": "invalid-catch-placement",
"message": "Cannot have an {:catch} block outside an {#await ...} block",
"start": {
"line": 1,
"column": 7,
"character": 7
},
"pos": 7
}

1
test/parser/samples/error-catch-without-await/input.svelte
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@ -0,0 +1 @@
{:catch theValue}

10
test/parser/samples/error-then-without-await/error.json
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@ -0,0 +1,10 @@
{
"code": "invalid-then-placement",
"message": "Cannot have an {:then} block outside an {#await ...} block",
"start": {
"line": 1,
"column": 6,
"character": 6
},
"pos": 6
}

1
test/parser/samples/error-then-without-await/input.svelte
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@ -0,0 +1 @@
{:then theValue}
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