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Diffstat (limited to 'include/llvm/Support/Streams.h')
-rw-r--r-- | include/llvm/Support/Streams.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/include/llvm/Support/Streams.h b/include/llvm/Support/Streams.h new file mode 100644 index 0000000000..5af96fdff3 --- /dev/null +++ b/include/llvm/Support/Streams.h @@ -0,0 +1,47 @@ +//===- 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) {} + + 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 |