cerxes/babel
3
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Add export interface Flow syntax support

Browse Source 
An interface export is just like a type export. In fact, it's a syntax affordance which makes the following equivalent:

```javascript
interface I_ { ... }
export type I = I_;
```

```javascript
export interface I { ... }
```

See facebook/flow#1145
This commit is contained in:
Sam Goldman 2016-01-05 15:56:04 -08:00
parent bd5c1a5b1b
commit a04948f70f
3 changed files with 359 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
src/plugins/flow.js
View File

@ -687,7 +687,9 @@ export default function (instance) {
// export type
instance.extend("shouldParseExportDeclaration", function (inner) {
return function () {
return this.isContextual("type") || inner.call(this);
return this.isContextual("type")
|| this.isContextual("interface")
|| inner.call(this);
};
});
@ -745,6 +747,11 @@ export default function (instance) {
// export type Foo = Bar;
return this.flowParseTypeAlias(declarationNode);
}
} else if (this.isContextual("interface")) {
node.exportKind = "type";
let declarationNode = this.startNode();
this.next();
return this.flowParseInterface(declarationNode);
} else {
return inner.call(this, node);
}

2
test/fixtures/flow/type-exports/interface/actual.js vendored Normal file
View File

@ -0,0 +1,2 @@
export interface foo { p: number };
export interface foo<T> { p: T };

349
test/fixtures/flow/type-exports/interface/expected.json vendored Normal file
View File

@ -0,0 +1,349 @@
{
"type": "File",
"start": 0,
"end": 69,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 2,
"column": 33
}
},
"program": {
"type": "Program",
"start": 0,
"end": 69,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 2,
"column": 33
}
},
"sourceType": "module",
"body": [
{
"type": "ExportNamedDeclaration",
"start": 0,
"end": 34,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 1,
"column": 34
}
},
"specifiers": [],
"source": null,
"exportKind": "type",
"declaration": {
"type": "InterfaceDeclaration",
"start": 7,
"end": 34,
"loc": {
"start": {
"line": 1,
"column": 7
},
"end": {
"line": 1,
"column": 34
}
},
"id": {
"type": "Identifier",
"start": 17,
"end": 20,
"loc": {
"start": {
"line": 1,
"column": 17
},
"end": {
"line": 1,
"column": 20
}
},
"name": "foo"
},
"typeParameters": null,
"extends": [],
"mixins": [],
"body": {
"type": "ObjectTypeAnnotation",
"start": 21,
"end": 34,
"loc": {
"start": {
"line": 1,
"column": 21
},
"end": {
"line": 1,
"column": 34
}
},
"callProperties": [],
"properties": [
{
"type": "ObjectTypeProperty",
"start": 23,
"end": 32,
"loc": {
"start": {
"line": 1,
"column": 23
},
"end": {
"line": 1,
"column": 32
}
},
"key": {
"type": "Identifier",
"start": 23,
"end": 24,
"loc": {
"start": {
"line": 1,
"column": 23
},
"end": {
"line": 1,
"column": 24
}
},
"name": "p"
},
"value": {
"type": "NumberTypeAnnotation",
"start": 26,
"end": 32,
"loc": {
"start": {
"line": 1,
"column": 26
},
"end": {
"line": 1,
"column": 32
}
}
},
"optional": false
}
],
"indexers": []
}
}
},
{
"type": "EmptyStatement",
"start": 34,
"end": 35,
"loc": {
"start": {
"line": 1,
"column": 34
},
"end": {
"line": 1,
"column": 35
}
}
},
{
"type": "ExportNamedDeclaration",
"start": 36,
"end": 68,
"loc": {
"start": {
"line": 2,
"column": 0
},
"end": {
"line": 2,
"column": 32
}
},
"specifiers": [],
"source": null,
"exportKind": "type",
"declaration": {
"type": "InterfaceDeclaration",
"start": 43,
"end": 68,
"loc": {
"start": {
"line": 2,
"column": 7
},
"end": {
"line": 2,
"column": 32
}
},
"id": {
"type": "Identifier",
"start": 53,
"end": 56,
"loc": {
"start": {
"line": 2,
"column": 17
},
"end": {
"line": 2,
"column": 20
}
},
"name": "foo"
},
"typeParameters": {
"type": "TypeParameterDeclaration",
"start": 56,
"end": 59,
"loc": {
"start": {
"line": 2,
"column": 20
},
"end": {
"line": 2,
"column": 23
}
},
"params": [
{
"type": "Identifier",
"start": 57,
"end": 58,
"loc": {
"start": {
"line": 2,
"column": 21
},
"end": {
"line": 2,
"column": 22
}
},
"name": "T"
}
]
},
"extends": [],
"mixins": [],
"body": {
"type": "ObjectTypeAnnotation",
"start": 60,
"end": 68,
"loc": {
"start": {
"line": 2,
"column": 24
},
"end": {
"line": 2,
"column": 32
}
},
"callProperties": [],
"properties": [
{
"type": "ObjectTypeProperty",
"start": 62,
"end": 66,
"loc": {
"start": {
"line": 2,
"column": 26
},
"end": {
"line": 2,
"column": 30
}
},
"key": {
"type": "Identifier",
"start": 62,
"end": 63,
"loc": {
"start": {
"line": 2,
"column": 26
},
"end": {
"line": 2,
"column": 27
}
},
"name": "p"
},
"value": {
"type": "GenericTypeAnnotation",
"start": 65,
"end": 66,
"loc": {
"start": {
"line": 2,
"column": 29
},
"end": {
"line": 2,
"column": 30
}
},
"typeParameters": null,
"id": {
"type": "Identifier",
"start": 65,
"end": 66,
"loc": {
"start": {
"line": 2,
"column": 29
},
"end": {
"line": 2,
"column": 30
}
},
"name": "T"
}
},
"optional": false
}
],
"indexers": []
}
}
},
{
"type": "EmptyStatement",
"start": 68,
"end": 69,
"loc": {
"start": {
"line": 2,
"column": 32
},
"end": {
"line": 2,
"column": 33
}
}
}
],
"directives": []
}
}