libcxx/include/__new/exceptions.h

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #ifndef _LIBCPP___NEW_EXCEPTIONS_H
  10 #define _LIBCPP___NEW_EXCEPTIONS_H
  11
  12 #include <__config>
  13 #include <__exception/exception.h>
  14 #include <__verbose_abort>
  15
  16 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  17 #  pragma GCC system_header
  18 #endif
  19
  20 // purposefully not using versioning namespace
  21 namespace std {
  22 #if !defined(_LIBCPP_ABI_VCRUNTIME)
  23
  24 class _LIBCPP_EXPORTED_FROM_ABI bad_alloc : public exception {
  25 public:
  26   bad_alloc() _NOEXCEPT;
  27   _LIBCPP_HIDE_FROM_ABI bad_alloc(const bad_alloc&) _NOEXCEPT            = default;
  28   _LIBCPP_HIDE_FROM_ABI bad_alloc& operator=(const bad_alloc&) _NOEXCEPT = default;
  29   ~bad_alloc() _NOEXCEPT override;
  30   const char* what() const _NOEXCEPT override;
  31 };
  32
  33 class _LIBCPP_EXPORTED_FROM_ABI bad_array_new_length : public bad_alloc {
  34 public:
  35   bad_array_new_length() _NOEXCEPT;
  36   _LIBCPP_HIDE_FROM_ABI bad_array_new_length(const bad_array_new_length&) _NOEXCEPT            = default;
  37   _LIBCPP_HIDE_FROM_ABI bad_array_new_length& operator=(const bad_array_new_length&) _NOEXCEPT = default;
  38   ~bad_array_new_length() _NOEXCEPT override;
  39   const char* what() const _NOEXCEPT override;
  40 };
  41
  42 #elif defined(_HAS_EXCEPTIONS) && _HAS_EXCEPTIONS == 0 // !_LIBCPP_ABI_VCRUNTIME
  43
  44 // When _HAS_EXCEPTIONS == 0, these complete definitions are needed,
  45 // since they would normally be provided in vcruntime_exception.h
  46 class bad_alloc : public exception {
  47 public:
  48   bad_alloc() noexcept : exception("bad allocation") {}
  49
  50 private:
  51   friend class bad_array_new_length;
  52
  53   bad_alloc(char const* const __message) noexcept : exception(__message) {}
  54 };
  55
  56 class bad_array_new_length : public bad_alloc {
  57 public:
  58   bad_array_new_length() noexcept : bad_alloc("bad array new length") {}
  59 };
  60
  61 #endif // defined(_LIBCPP_ABI_VCRUNTIME) && defined(_HAS_EXCEPTIONS) && _HAS_EXCEPTIONS == 0
  62
  63 [[__noreturn__]] _LIBCPP_EXPORTED_FROM_ABI void __throw_bad_alloc(); // not in C++ spec
  64
  65 [[__noreturn__]] inline _LIBCPP_HIDE_FROM_ABI void __throw_bad_array_new_length() {
  66 #if _LIBCPP_HAS_EXCEPTIONS
  67   throw bad_array_new_length();
  68 #else
  69   _LIBCPP_VERBOSE_ABORT("bad_array_new_length was thrown in -fno-exceptions mode");
  70 #endif
  71 }
  72 } // namespace std
  73
  74 #endif // _LIBCPP___NEW_EXCEPTIONS_H