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//===- llvm/Support/Streams.h - Wrappers for iostreams ----------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Bill Wendling and is distributed under the
// University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements a wrapper for the std::cout and std::cerr I/O streams.
// It prevents the need to include <iostream> to each file just to get I/O.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_SUPPORT_STREAMS_H
#define LLVM_SUPPORT_STREAMS_H
#include <ostream> // Doesn't have static d'tors!!
namespace llvm {
/// llvm_ostream - Acts like an ostream. It's a wrapper for the std::cerr and
/// std::cout ostreams. However, it doesn't require #including <iostream> in
/// every file, which increases static c'tors & d'tors in the object code.
///
class llvm_ostream {
std::ostream* Stream;
public:
llvm_ostream() : Stream(0) {}
llvm_ostream(std::ostream &OStream) : Stream(&OStream) {}
std::ostream* stream() const { return Stream; }
inline llvm_ostream &operator << (std::ostream& (*Func)(std::ostream&)) {
*Stream << Func;
return *this;
}
template <typename Ty>
llvm_ostream &operator << (const Ty &Thing) {
if (Stream) *Stream << Thing;
return *this;
}
bool operator == (const std::ostream &OS) { return &OS == Stream; }
};
extern llvm_ostream llvm_null;
extern llvm_ostream llvm_cout;
extern llvm_ostream llvm_cerr;
} // End llvm namespace
#endif
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