Instantiation of local class members.

If a function containing a local class is instantiated, instantiate
all of local class member, including default arguments and exception
specifications.

This change fixes PR21332 and thus implements DR1484.

Differential Revision: http://reviews.llvm.org/D9990

llvm-svn: 240974

1 files changed, 9 insertions, 1 deletions

diff --git a/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp b/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
index f35d1aaf77e..e240c705082 100644
--- a/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
+++ b/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
@@ -3246,10 +3246,18 @@ TemplateDeclInstantiator::InitFunctionInstantiation(FunctionDecl *New,
 
     // DR1330: In C++11, defer instantiation of a non-trivial
     // exception specification.
+    // DR1484: Local classes and their members are instantiated along with the
+    // containing function.
+    bool RequireInstantiation = false;
+    if (CXXRecordDecl *Cls = dyn_cast<CXXRecordDecl>(Tmpl->getDeclContext())) {
+      if (Cls->isLocalClass())
+        RequireInstantiation = true;
+    }
     if (SemaRef.getLangOpts().CPlusPlus11 &&
         EPI.ExceptionSpec.Type != EST_None &&
         EPI.ExceptionSpec.Type != EST_DynamicNone &&
-        EPI.ExceptionSpec.Type != EST_BasicNoexcept) {
+        EPI.ExceptionSpec.Type != EST_BasicNoexcept &&
+        !RequireInstantiation) {
       FunctionDecl *ExceptionSpecTemplate = Tmpl;
       if (EPI.ExceptionSpec.Type == EST_Uninstantiated)
         ExceptionSpecTemplate = EPI.ExceptionSpec.SourceTemplate;