From 8453ddb5fed2d04e12824e92a0bd2cc66091bb4c Mon Sep 17 00:00:00 2001
From: Douglas Gregor <dgregor@apple.com>
Date: Thu, 1 Jul 2010 20:59:04 +0000
Subject: Provide exception specifications for implicitly-declared copy
 constructors.

llvm-svn: 107429
---
 clang/lib/Sema/SemaDeclCXX.cpp | 49 ++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 47 insertions(+), 2 deletions(-)

(limited to 'clang/lib/Sema/SemaDeclCXX.cpp')

diff --git a/clang/lib/Sema/SemaDeclCXX.cpp b/clang/lib/Sema/SemaDeclCXX.cpp
index cb454581d1a..56e965f81fe 100644
--- a/clang/lib/Sema/SemaDeclCXX.cpp
+++ b/clang/lib/Sema/SemaDeclCXX.cpp
@@ -4988,6 +4988,49 @@ CXXConstructorDecl *Sema::DeclareImplicitCopyConstructor(Scope *S,
     ArgType = ArgType.withConst();
   ArgType = Context.getLValueReferenceType(ArgType);
   
+  // C++ [except.spec]p14:
+  //   An implicitly declared special member function (Clause 12) shall have an 
+  //   exception-specification. [...]
+  ImplicitExceptionSpecification ExceptSpec(Context);
+  unsigned Quals = HasConstCopyConstructor? Qualifiers::Const : 0;
+  for (CXXRecordDecl::base_class_iterator Base = ClassDecl->bases_begin(),
+                                       BaseEnd = ClassDecl->bases_end();
+       Base != BaseEnd; 
+       ++Base) {
+    // Virtual bases are handled below.
+    if (Base->isVirtual())
+      continue;
+    
+    const CXXRecordDecl *BaseClassDecl
+      = cast<CXXRecordDecl>(Base->getType()->getAs<RecordType>()->getDecl());
+    if (CXXConstructorDecl *CopyConstructor
+                          = BaseClassDecl->getCopyConstructor(Context, Quals))
+      ExceptSpec.CalledDecl(CopyConstructor);
+  }
+  for (CXXRecordDecl::base_class_iterator Base = ClassDecl->vbases_begin(),
+                                       BaseEnd = ClassDecl->vbases_end();
+       Base != BaseEnd; 
+       ++Base) {
+    const CXXRecordDecl *BaseClassDecl
+      = cast<CXXRecordDecl>(Base->getType()->getAs<RecordType>()->getDecl());
+    if (CXXConstructorDecl *CopyConstructor
+                          = BaseClassDecl->getCopyConstructor(Context, Quals))
+      ExceptSpec.CalledDecl(CopyConstructor);
+  }
+  for (CXXRecordDecl::field_iterator Field = ClassDecl->field_begin(),
+                                  FieldEnd = ClassDecl->field_end();
+       Field != FieldEnd;
+       ++Field) {
+    QualType FieldType = Context.getBaseElementType((*Field)->getType());
+    if (const RecordType *FieldClassType = FieldType->getAs<RecordType>()) {
+      const CXXRecordDecl *FieldClassDecl
+        = cast<CXXRecordDecl>(FieldClassType->getDecl());
+      if (CXXConstructorDecl *CopyConstructor
+                          = FieldClassDecl->getCopyConstructor(Context, Quals))
+        ExceptSpec.CalledDecl(CopyConstructor);
+    }
+  }
+  
   //   An implicitly-declared copy constructor is an inline public
   //   member of its class.
   DeclarationName Name
@@ -4999,8 +5042,10 @@ CXXConstructorDecl *Sema::DeclareImplicitCopyConstructor(Scope *S,
                                  Context.getFunctionType(Context.VoidTy,
                                                          &ArgType, 1,
                                                          false, 0,
-                                               /*FIXME: hasExceptionSpec*/false,
-                                                         false, 0, 0,
+                                         ExceptSpec.hasExceptionSpecification(),
+                                      ExceptSpec.hasAnyExceptionSpecification(),
+                                                         ExceptSpec.size(),
+                                                         ExceptSpec.data(),
                                                        FunctionType::ExtInfo()),
                                  /*TInfo=*/0,
                                  /*isExplicit=*/false,
-- 
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