zig/lib/libcxx/include/__assert

// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef _LIBCPP___ASSERT
#define _LIBCPP___ASSERT

#include <__assertion_handler> // Note: this include is generated by CMake and is potentially vendor-provided.
#include <__config>

#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#  pragma GCC system_header
#endif

#define _LIBCPP_ASSERT(expression, message)                                                                            \
  (__builtin_expect(static_cast<bool>(expression), 1)                                                                  \
       ? (void)0                                                                                                       \
       : _LIBCPP_ASSERTION_HANDLER(__FILE__ ":" _LIBCPP_TOSTRING(__LINE__) ": assertion " _LIBCPP_TOSTRING(            \
             expression) " failed: " message "\n"))

// TODO: __builtin_assume can currently inhibit optimizations. Until this has been fixed and we can add
//       assumptions without a clear optimization intent, disable that to avoid worsening the code generation.
//       See https://discourse.llvm.org/t/llvm-assume-blocks-optimization/71609 for a discussion.
#if 0 && __has_builtin(__builtin_assume)
#  define _LIBCPP_ASSUME(expression)                                                                                   \
    (_LIBCPP_DIAGNOSTIC_PUSH _LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wassume")                                              \
         __builtin_assume(static_cast<bool>(expression)) _LIBCPP_DIAGNOSTIC_POP)
#else
#  define _LIBCPP_ASSUME(expression) ((void)0)
#endif

#endif // _LIBCPP___ASSERT