maxmustermann/TypeScript
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

Tweak isAliasedType

Browse source
This commit is contained in:
Anders Hejlsberg 2019-08-30 16:39:31 -07:00
parent 81bfa6f2e0
commit a92d5992d2
1 changed files with 5 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
src/compiler/checker.ts
View file

@ -9618,16 +9618,18 @@ namespace ts {
return getTupleTypeOfArity(node.elementTypes.length, minLength, !!restElement, readonly, /*associatedNames*/ undefined);
}
// Return true when the given node is transitively contained in type constructs that eagerly
// resolve their constituent types. We include SyntaxKind.TypeReference because type arguments
// of type aliases are eagerly resolved.
function isAliasedType(node: Node): boolean {
const parent = node.parent;
switch (parent.kind) {
case SyntaxKind.ParenthesizedType:
case SyntaxKind.ArrayType:
case SyntaxKind.TupleType:
case SyntaxKind.RestType:
case SyntaxKind.TypeReference:
case SyntaxKind.UnionType:
case SyntaxKind.IntersectionType:
case SyntaxKind.IndexedAccessType:
case SyntaxKind.ConditionalType:
return isAliasedType(parent);
case SyntaxKind.TypeAliasDeclaration:
return true;