From: Francois Pichet <pichet2000@gmail.com>
Date: Fri, 22 Apr 2011 23:20:44 +0000 (+0000)
Subject: Correctly emit a diagnostic for multiple templated function definitions in -flate... 
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=d4a0caf78e7c18e7aca65fbfd799a6c024ff51fb;p=clang

Correctly emit a diagnostic for multiple templated function definitions in -flate-template-parsing mode.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@130030 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/clang/Sema/Sema.h b/include/clang/Sema/Sema.h
index b1746ac308..3694d7e354 100644
--- a/include/clang/Sema/Sema.h
+++ b/include/clang/Sema/Sema.h
@@ -889,6 +889,7 @@ public:
                                       bool TypeMayContainAuto = true);
   void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D,
                                        SourceLocation LocAfterDecls);
+  void CheckForFunctionRedefinition(FunctionDecl *FD);
   Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D);
   Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D);
   void ActOnStartOfObjCMethodDef(Scope *S, Decl *D);
diff --git a/lib/Parse/ParseCXXInlineMethods.cpp b/lib/Parse/ParseCXXInlineMethods.cpp
index 778aa11087..c02d75c37f 100644
--- a/lib/Parse/ParseCXXInlineMethods.cpp
+++ b/lib/Parse/ParseCXXInlineMethods.cpp
@@ -65,6 +65,7 @@ Decl *Parser::ParseCXXInlineMethodDef(AccessSpecifier AS, ParsingDeclarator &D,
         FD = FunTmpl->getTemplatedDecl();
       else
         FD = cast<FunctionDecl>(FnD);
+      Actions.CheckForFunctionRedefinition(FD);
 
       LateParsedTemplateMap[FD] = LPT;
       Actions.MarkAsLateParsedTemplate(FD);
diff --git a/lib/Parse/Parser.cpp b/lib/Parse/Parser.cpp
index 6522306dce..e0f7852e3c 100644
--- a/lib/Parse/Parser.cpp
+++ b/lib/Parse/Parser.cpp
@@ -821,6 +821,7 @@ Decl *Parser::ParseFunctionDefinition(ParsingDeclarator &D,
         FnD = FunTmpl->getTemplatedDecl();
       else
         FnD = cast<FunctionDecl>(DP);
+      Actions.CheckForFunctionRedefinition(FnD);
 
       LateParsedTemplateMap[FnD] = LPT;
       Actions.MarkAsLateParsedTemplate(FnD);
diff --git a/lib/Sema/SemaDecl.cpp b/lib/Sema/SemaDecl.cpp
index 2abc6dafa8..b1d9bc2c8e 100644
--- a/lib/Sema/SemaDecl.cpp
+++ b/lib/Sema/SemaDecl.cpp
@@ -5729,6 +5729,22 @@ static bool ShouldWarnAboutMissingPrototype(const FunctionDecl *FD) {
   return MissingPrototype;
 }
 
+void Sema::CheckForFunctionRedefinition(FunctionDecl *FD) {
+  // Don't complain if we're in GNU89 mode and the previous definition
+  // was an extern inline function.
+  const FunctionDecl *Definition;
+  if (FD->hasBody(Definition) &&
+      !canRedefineFunction(Definition, getLangOptions())) {
+    if (getLangOptions().GNUMode && Definition->isInlineSpecified() &&
+        Definition->getStorageClass() == SC_Extern)
+      Diag(FD->getLocation(), diag::err_redefinition_extern_inline)
+        << FD->getDeclName() << getLangOptions().CPlusPlus;
+    else
+      Diag(FD->getLocation(), diag::err_redefinition) << FD->getDeclName();
+    Diag(Definition->getLocation(), diag::note_previous_definition);
+  }
+}
+
 Decl *Sema::ActOnStartOfFunctionDef(Scope *FnBodyScope, Decl *D) {
   // Clear the last template instantiation error context.
   LastTemplateInstantiationErrorContext = ActiveTemplateInstantiation();
@@ -5746,24 +5762,8 @@ Decl *Sema::ActOnStartOfFunctionDef(Scope *FnBodyScope, Decl *D) {
   PushFunctionScope();
 
   // See if this is a redefinition.
-  // But don't complain if we're in GNU89 mode and the previous definition
-  // was an extern inline function.
-
-  // FIXME: This code doesn't complain about multiple definition for late
-  // parsed template function.
-  bool IsLateParsingRedefinition = LateTemplateParser &&
-                                   FD->isLateTemplateParsed();
-  const FunctionDecl *Definition;
-  if (FD->hasBody(Definition) && !IsLateParsingRedefinition &&
-      !canRedefineFunction(Definition, getLangOptions())) {
-    if (getLangOptions().GNUMode && Definition->isInlineSpecified() &&
-        Definition->getStorageClass() == SC_Extern)
-      Diag(FD->getLocation(), diag::err_redefinition_extern_inline)
-        << FD->getDeclName() << getLangOptions().CPlusPlus;
-    else
-      Diag(FD->getLocation(), diag::err_redefinition) << FD->getDeclName();
-    Diag(Definition->getLocation(), diag::note_previous_definition);
-  }
+  if (!FD->isLateTemplateParsed())
+    CheckForFunctionRedefinition(FD);
 
   // Builtin functions cannot be defined.
   if (unsigned BuiltinID = FD->getBuiltinID()) {
diff --git a/test/Parser/DelayedTemplateParsing.cpp b/test/Parser/DelayedTemplateParsing.cpp
index 355250e4b0..50cf7412cc 100644
--- a/test/Parser/DelayedTemplateParsing.cpp
+++ b/test/Parser/DelayedTemplateParsing.cpp
@@ -2,14 +2,23 @@
 
 template <class T>
 class A {
-
    void foo() {
        undeclared();
    }
-   
-   void foo2();
+      void foo2();
+};
+
+template <class T>
+class B {
+   void foo4() { } // expected-note {{previous definition is here}}  expected-note {{previous definition is here}}
+   void foo4() { } // expected-error {{class member cannot be redeclared}} expected-error {{redefinition of 'foo4'}}  expected-note {{previous definition is here}}
 };
 
+
+template <class T>
+void B<T>::foo4() {// expected-error {{redefinition of 'foo4'}}
+}
+
 template <class T>
 void A<T>::foo2() {
     undeclared();
@@ -29,3 +38,5 @@ void undeclared()
 
 }
 
+template <class T> void foo5() {} //expected-note {{previous definition is here}} 
+template <class T> void foo5() {} // expected-error {{redefinition of 'foo5'}}