From: Eli Friedman <eli.friedman@gmail.com>
Date: Sat, 19 May 2012 23:35:23 +0000 (+0000)
Subject: Make delegating initializers use a similar codepath to base initializers in dependent... 
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=d21016f0b6d9dfcce9cd9f2d1451286e75d9de48;p=clang

Make delegating initializers use a similar codepath to base initializers in dependent contexts.  PR12890.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@157136 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Sema/SemaDeclCXX.cpp b/lib/Sema/SemaDeclCXX.cpp
index 9571a26845..676063ac08 100644
--- a/lib/Sema/SemaDeclCXX.cpp
+++ b/lib/Sema/SemaDeclCXX.cpp
@@ -2234,6 +2234,16 @@ Sema::BuildDelegatingInitializer(TypeSourceInfo *TInfo, Expr *Init,
   if (DelegationInit.isInvalid())
     return true;
 
+  // If we are in a dependent context, template instantiation will
+  // perform this type-checking again. Just save the arguments that we
+  // received in a ParenListExpr.
+  // FIXME: This isn't quite ideal, since our ASTs don't capture all
+  // of the information that we have about the base
+  // initializer. However, deconstructing the ASTs is a dicey process,
+  // and this approach is far more likely to get the corner cases right.
+  if (CurContext->isDependentContext())
+    DelegationInit = Owned(Init);
+
   return new (Context) CXXCtorInitializer(Context, TInfo, InitRange.getBegin(), 
                                           DelegationInit.takeAs<Expr>(),
                                           InitRange.getEnd());
diff --git a/test/SemaTemplate/delegating-constructors.cpp b/test/SemaTemplate/delegating-constructors.cpp
index e177b50375..852b89d809 100644
--- a/test/SemaTemplate/delegating-constructors.cpp
+++ b/test/SemaTemplate/delegating-constructors.cpp
@@ -29,3 +29,21 @@ namespace PR10457 {
     Foo f(1, 1);
   }
 }
+
+namespace PR12890 {
+  class Document
+  {
+  public:
+      Document() = default;
+
+      template <class T>
+      explicit
+      Document(T&& t) : Document()
+      {
+      }
+  };
+  void f()
+  {
+      Document d(1);
+  }
+}