This patch implements as much of the narrowing conversion error specified by

[dcl.init.list] as is possible without generalized initializer lists or full
constant expression support, and adds a c++0x-compat warning in C++98 mode.

The FixIt currently uses a typedef's basename without qualification, which is
likely to be incorrect on some code.  If it's incorrect on too much code, we
should write a function to get the string that refers to a type from a
particular context.

The warning is currently off by default. I'll fix LLVM and clang before turning
it on.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@136181 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 12 insertions, 1 deletions

diff --git a/include/clang/Sema/Initialization.h b/include/clang/Sema/Initialization.h
index 3b100ce257..fd677ef601 100644
--- a/include/clang/Sema/Initialization.h
+++ b/include/clang/Sema/Initialization.h
@@ -732,7 +732,18 @@ public:
   /// \brief Determine whether this initialization is direct call to a 
   /// constructor.
   bool isConstructorInitialization() const;
-  
+
+  // \brief Returns whether the last step in this initialization sequence is a
+  // narrowing conversion, defined by C++0x [dcl.init.list]p7.
+  //
+  // If this function returns true, *isInitializerConstant will be set to
+  // describe whether *Initializer was a constant expression.  If
+  // *isInitializerConstant is set to true, *ConstantValue will be set to the
+  // evaluated value of *Initializer.
+  bool endsWithNarrowing(ASTContext &Ctx, const Expr *Initializer,
+                         bool *isInitializerConstant,
+                         APValue *ConstantValue) const;
+
   /// \brief Add a new step in the initialization that resolves the address
   /// of an overloaded function to a specific function declaration.
   ///