From: Richard Smith <richard-llvm@metafoo.co.uk>
Date: Fri, 11 Aug 2017 02:04:19 +0000 (+0000)
Subject: PR33489: A function-style cast to a deduced class template specialization type is... 
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=b411aeb89996d2eca4b300c5ceabb8b180ef7e67;p=clang

PR33489: A function-style cast to a deduced class template specialization type is type-dependent if it can't be resolved due to a type-dependent argument.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@310691 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/AST/ExprCXX.cpp b/lib/AST/ExprCXX.cpp
index 6713fca045..fe45b5e47f 100644
--- a/lib/AST/ExprCXX.cpp
+++ b/lib/AST/ExprCXX.cpp
@@ -1052,7 +1052,9 @@ CXXUnresolvedConstructExpr::CXXUnresolvedConstructExpr(TypeSourceInfo *Type,
           :Type->getType()->isRValueReferenceType()? VK_XValue
           :VK_RValue),
          OK_Ordinary,
-         Type->getType()->isDependentType(), true, true,
+         Type->getType()->isDependentType() ||
+             Type->getType()->getContainedDeducedType(),
+         true, true,
          Type->getType()->containsUnexpandedParameterPack()),
     Type(Type),
     LParenLoc(LParenLoc),
diff --git a/test/SemaCXX/cxx1z-class-template-argument-deduction.cpp b/test/SemaCXX/cxx1z-class-template-argument-deduction.cpp
index 668c242802..9232a8b6eb 100644
--- a/test/SemaCXX/cxx1z-class-template-argument-deduction.cpp
+++ b/test/SemaCXX/cxx1z-class-template-argument-deduction.cpp
@@ -286,6 +286,29 @@ namespace tuple_tests {
   }
 }
 
+namespace dependent {
+  template<typename T> struct X {
+    X(T);
+  };
+  template<typename T> int Var(T t) {
+    X x(t);
+    return X(x) + 1; // expected-error {{invalid operands}}
+  }
+  template<typename T> int Cast(T t) {
+    return X(X(t)) + 1; // expected-error {{invalid operands}}
+  }
+  template<typename T> int New(T t) {
+    return X(new X(t)) + 1; // expected-error {{invalid operands}}
+  };
+  template int Var(float); // expected-note {{instantiation of}}
+  template int Cast(float); // expected-note {{instantiation of}}
+  template int New(float); // expected-note {{instantiation of}}
+  template<typename T> int operator+(X<T>, int);
+  template int Var(int);
+  template int Cast(int);
+  template int New(int);
+}
+
 #else
 
 // expected-no-diagnostics