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Anders Hejlsberg 2015-06-16 11:53:00 -07:00
parent de8eb229c8
commit 38e3d9f718
1 changed files with 2 additions and 0 deletions
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src/compiler/checker.ts
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@ -10662,6 +10662,8 @@ module ts {
checkTypeAssignableTo(staticType, getTypeWithoutSignatures(staticBaseType), node.name || node,
Diagnostics.Class_static_side_0_incorrectly_extends_base_class_static_side_1);
if (!(staticBaseType.symbol && staticBaseType.symbol.flags & SymbolFlags.Class)) {
// When the static base type is a "class-like" constructor function (but not actually a class), we verify
// that all instantiated base constructor signatures return the same type.
let constructors = getInstantiatedConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments);
if (forEach(constructors, sig => getReturnTypeOfSignature(sig) !== baseType)) {
error(baseTypeNode.expression, Diagnostics.Base_constructors_must_all_have_the_same_return_type);