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feat: add optional MemberExpression

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Sven SAULEAU 2017-04-15 18:19:43 +02:00
parent 482b8155a3
commit 7b51979152
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3 changed files with 109 additions and 0 deletions
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8
src/parser/expression.js
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@ -284,6 +284,14 @@ pp.parseSubscripts = function (base, startPos, startLoc, noCalls) {
node.object = base;
node.callee = this.parseNoCallExpr();
return this.parseSubscripts(this.finishNode(node, "BindExpression"), startPos, startLoc, noCalls);
} else if (this.eat(tt.question)) {
const node = this.startNodeAt(startPos, startLoc);
node.object = base;
node.optional = true;
this.next();
node.property = this.parseIdentifier(true);
node.computed = false;
base = this.finishNode(node, "MemberExpression");
} else if (this.eat(tt.dot)) {
const node = this.startNodeAt(startPos, startLoc);
node.object = base;

1
test/fixtures/es2017/optional-chaining/member-access/actual.js vendored Normal file
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@ -0,0 +1 @@
foo?.bar

100
test/fixtures/es2017/optional-chaining/member-access/expected.json vendored Normal file
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@ -0,0 +1,100 @@
{
"type": "File",
"start": 0,
"end": 8,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 1,
"column": 8
}
},
"program": {
"type": "Program",
"start": 0,
"end": 8,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 1,
"column": 8
}
},
"sourceType": "script",
"body": [
{
"type": "ExpressionStatement",
"start": 0,
"end": 8,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 1,
"column": 8
}
},
"expression": {
"type": "MemberExpression",
"start": 0,
"end": 8,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 1,
"column": 8
}
},
"object": {
"type": "Identifier",
"start": 0,
"end": 3,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 1,
"column": 3
},
"identifierName": "foo"
},
"name": "foo"
},
"optional": true,
"property": {
"type": "Identifier",
"start": 5,
"end": 8,
"loc": {
"start": {
"line": 1,
"column": 5
},
"end": {
"line": 1,
"column": 8
},
"identifierName": "bar"
},
"name": "bar"
},
"computed": false
}
}
],
"directives": []
}
}