mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-10-04 22:02:52 +01:00
32 lines
1.1 KiB
C++
32 lines
1.1 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
|
|
// Exceptions. See /LICENSE for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
|
|
#ifndef COMMON_OSTREAM_H_
|
|
#define COMMON_OSTREAM_H_
|
|
|
|
#include "llvm/Support/raw_ostream.h"
|
|
|
|
namespace Carbon {
|
|
|
|
// Support ostream << for types which implement:
|
|
// void Print(llvm::raw_ostream& out) const;
|
|
template <typename T, typename std::enable_if<std::is_member_function_pointer<
|
|
decltype(&T::Print)>::value>::type* = nullptr>
|
|
auto operator<<(llvm::raw_ostream& out, const T& obj) -> llvm::raw_ostream& {
|
|
obj.Print(out);
|
|
return out;
|
|
}
|
|
|
|
// Prevents ostream << for pointers to printable types.
|
|
template <typename T, typename std::enable_if<std::is_member_function_pointer<
|
|
decltype(&T::Print)>::value>::type* = nullptr>
|
|
__attribute__((unavailable(
|
|
"Received a pointer to a printable type, are you missing a `*`? "
|
|
"To print as a pointer, cast to void*."))) auto
|
|
operator<<(llvm::raw_ostream& out, const T* /*obj*/) -> llvm::raw_ostream&;
|
|
|
|
} // namespace Carbon
|
|
|
|
#endif // COMMON_OSTREAM_H_
|