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Adjust cloning of nodes in import/export-specifiers and obj-destructu…
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…ring (#24)

The cloning caused comments that where added to the original node to be persisted into
the cloned node.
Espree/Acorn does not have any cloning, that's why it is working there.
This change omits comments when cloning, as removing the cloning
causes tests in babel to fail.
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@danez @hzoo
danez authored and hzoo committed Jun 21, 2016
1 parent 92d45c3 commit f11a82c
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Showing 6 changed files with 361 additions and 2 deletions.
11 changes: 9 additions & 2 deletions src/parser/node.js
View file
Expand Up @@ -4,6 +4,7 @@ import { SourceLocation } from "../util/location";
// Start an AST node, attaching a start offset.

const pp = Parser.prototype;
const commentKeys = ["leadingComments", "trailingComments", "innerComments"];

class Node {
constructor(pos?: number, loc?: SourceLocation, filename?: string) {
Expand All @@ -20,8 +21,14 @@ class Node {
loc: SourceLocation;

__clone(): Node {
let node2 = new Node;
for (let key in this) node2[key] = this[key];
const node2 = new Node;
for (let key in this) {
// Do not clone comments that are already attached to the node
if (commentKeys.indexOf(key) < 0) {
node2[key] = this[key];
}
}

return node2;
}
}
Expand Down
3 changes: 3 additions & 0 deletions test/fixtures/comments/basic/shebang-import/actual.js
View file
@@ -0,0 +1,3 @@
#!/usr/bin/env babel-node

import {spawn} from 'foobar';
154 changes: 154 additions & 0 deletions test/fixtures/comments/basic/shebang-import/expected.json
View file
@@ -0,0 +1,154 @@
{
"type": "File",
"start": 0,
"end": 56,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 3,
"column": 29
}
},
"program": {
"type": "Program",
"start": 0,
"end": 56,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 3,
"column": 29
}
},
"sourceType": "module",
"body": [
{
"type": "ImportDeclaration",
"start": 27,
"end": 56,
"loc": {
"start": {
"line": 3,
"column": 0
},
"end": {
"line": 3,
"column": 29
}
},
"specifiers": [
{
"type": "ImportSpecifier",
"start": 35,
"end": 40,
"loc": {
"start": {
"line": 3,
"column": 8
},
"end": {
"line": 3,
"column": 13
}
},
"imported": {
"type": "Identifier",
"start": 35,
"end": 40,
"loc": {
"start": {
"line": 3,
"column": 8
},
"end": {
"line": 3,
"column": 13
}
},
"name": "spawn"
},
"local": {
"type": "Identifier",
"start": 35,
"end": 40,
"loc": {
"start": {
"line": 3,
"column": 8
},
"end": {
"line": 3,
"column": 13
}
},
"name": "spawn"
}
}
],
"source": {
"type": "StringLiteral",
"start": 47,
"end": 55,
"loc": {
"start": {
"line": 3,
"column": 20
},
"end": {
"line": 3,
"column": 28
}
},
"extra": {
"rawValue": "foobar",
"raw": "'foobar'"
},
"value": "foobar"
},
"leadingComments": [
{
"type": "CommentLine",
"value": "/usr/bin/env babel-node",
"start": 0,
"end": 25,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 1,
"column": 25
}
}
}
]
}
],
"directives": []
},
"comments": [
{
"type": "CommentLine",
"value": "/usr/bin/env babel-node",
"start": 0,
"end": 25,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 1,
"column": 25
}
}
}
]
}
3 changes: 3 additions & 0 deletions test/fixtures/comments/basic/shebang-import/options.json
View file
@@ -0,0 +1,3 @@
{
"sourceType": "module"
}
3 changes: 3 additions & 0 deletions test/fixtures/comments/basic/shebang-object/actual.js
View file
@@ -0,0 +1,3 @@
#!/usr/bin/env babel-node

var { spawn } = x;
189 changes: 189 additions & 0 deletions test/fixtures/comments/basic/shebang-object/expected.json
View file
@@ -0,0 +1,189 @@
{
"type": "File",
"start": 0,
"end": 45,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 3,
"column": 18
}
},
"program": {
"type": "Program",
"start": 0,
"end": 45,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 3,
"column": 18
}
},
"sourceType": "script",
"body": [
{
"type": "VariableDeclaration",
"start": 27,
"end": 45,
"loc": {
"start": {
"line": 3,
"column": 0
},
"end": {
"line": 3,
"column": 18
}
},
"declarations": [
{
"type": "VariableDeclarator",
"start": 31,
"end": 44,
"loc": {
"start": {
"line": 3,
"column": 4
},
"end": {
"line": 3,
"column": 17
}
},
"id": {
"type": "ObjectPattern",
"start": 31,
"end": 40,
"loc": {
"start": {
"line": 3,
"column": 4
},
"end": {
"line": 3,
"column": 13
}
},
"properties": [
{
"type": "ObjectProperty",
"start": 33,
"end": 38,
"loc": {
"start": {
"line": 3,
"column": 6
},
"end": {
"line": 3,
"column": 11
}
},
"method": false,
"shorthand": true,
"computed": false,
"key": {
"type": "Identifier",
"start": 33,
"end": 38,
"loc": {
"start": {
"line": 3,
"column": 6
},
"end": {
"line": 3,
"column": 11
}
},
"name": "spawn"
},
"value": {
"type": "Identifier",
"start": 33,
"end": 38,
"loc": {
"start": {
"line": 3,
"column": 6
},
"end": {
"line": 3,
"column": 11
}
},
"name": "spawn"
},
"extra": {
"shorthand": true
}
}
]
},
"init": {
"type": "Identifier",
"start": 43,
"end": 44,
"loc": {
"start": {
"line": 3,
"column": 16
},
"end": {
"line": 3,
"column": 17
}
},
"name": "x"
}
}
],
"kind": "var",
"leadingComments": [
{
"type": "CommentLine",
"value": "/usr/bin/env babel-node",
"start": 0,
"end": 25,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 1,
"column": 25
}
}
}
]
}
],
"directives": []
},
"comments": [
{
"type": "CommentLine",
"value": "/usr/bin/env babel-node",
"start": 0,
"end": 25,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 1,
"column": 25
}
}
}
]
}

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