avoid digit separators in preprocessing directives (#2008)

* avoid digit separators in preprocessing directives

fixes #1934, fixes #1638

Author: ericniebler

include/exec/detail/bit_cast.hpp

@@ -20,7 +20,7 @@
 
 #if __has_include(<bit>)
 #  include <bit>
-#  if __cpp_lib_bit_cast >= 2018'06L
+#  if __cpp_lib_bit_cast >= 201806L
 #    define STDEXEC_NO_STDCPP_BIT_CAST() 0
 #  else
 #    define STDEXEC_NO_STDCPP_BIT_CAST() 1
@@ -42,7 +42,7 @@ namespace experimental::execution
   [[nodiscard]]
   constexpr _To bit_cast(const _From& __from) noexcept
   {
-#  if STDEXEC_HAS_BUILTIN(__builtin_bit_cast) || (STDEXEC_MSVC() && STDEXEC_MSVC_VERSION >= 19'26)
+#  if STDEXEC_HAS_BUILTIN(__builtin_bit_cast) || (STDEXEC_MSVC() && STDEXEC_MSVC_VERSION >= 1926)
     return __builtin_bit_cast(_To, __from);
 #  else
     _To __to;

include/exec/detail/intrusive_heap.hpp

@@ -28,7 +28,7 @@ STDEXEC_PRAGMA_IGNORE_EDG(not_used_in_partial_spec_arg_list)
 
 namespace experimental::execution
 {
-#if defined(__cpp_lib_int_pow2) && __cpp_lib_int_pow2 >= 2020'02L
+#if defined(__cpp_lib_int_pow2) && __cpp_lib_int_pow2 >= 202002L
   namespace detail
   {
     using std::bit_ceil;

include/exec/sequence/ignore_all_values.hpp

@@ -73,7 +73,7 @@ namespace experimental::execution
       }
 
       template <class _Receiver>
-#if STDEXEC_NVHPC() && STDEXEC_NVHPC_VERSION <= 25'09
+#if STDEXEC_NVHPC() && STDEXEC_NVHPC_VERSION <= 2509
       // Avoid a codegen issue in NVHPC 25.9 and earlier
       [[gnu::noinline]]
 #endif

include/exec/timed_scheduler.hpp

@@ -143,7 +143,7 @@ namespace experimental::execution
 
     struct schedule_after_t : __schedule_after_base_t
     {
-#if !STDEXEC_CLANG() || STDEXEC_CLANG_VERSION >= 16'00
+#if !STDEXEC_CLANG() || STDEXEC_CLANG_VERSION >= 1600
       using __schedule_after_base_t::operator();
 #else
       // clang prior to 16 is not able to find the correct overload in the
@@ -222,7 +222,7 @@ namespace experimental::execution
 
     struct schedule_at_t : __schedule_at_base_t
     {
-#if !STDEXEC_CLANG() || STDEXEC_CLANG_VERSION >= 16'00
+#if !STDEXEC_CLANG() || STDEXEC_CLANG_VERSION >= 1600
       using __schedule_at_base_t::operator();
 #else
       // clang prior to 16 is not able to find the correct overload in the

include/nvexec/detail/cuda_fwd.cuh

@@ -21,7 +21,7 @@
 #include "config.cuh"
 #include <cuda/std/detail/__config>
 
-#if _LIBCUDACXX_STD_VER > 17 && _LIBCUDACXX_CUDA_API_VERSION < 1'009'000
+#if _LIBCUDACXX_STD_VER > 17 && _LIBCUDACXX_CUDA_API_VERSION < 1009000
 #  define STDEXEC_LIBCUDACXX_NEEDS_ATOMIC_WORKAROUND() 1
 #else
 #  define STDEXEC_LIBCUDACXX_NEEDS_ATOMIC_WORKAROUND() 0

include/nvexec/stream/common.cuh

@@ -982,7 +982,7 @@ namespace nv::execution
 
   inline constexpr _strm::get_stream_t get_stream{};
 
-#if CUDART_VERSION >= 13'00'0
+#if CUDART_VERSION >= 13000
   inline __host__ cudaError_t cudaMemPrefetchAsync(void const * dev_ptr,
                                                    size_t       count,
                                                    int          dst_device,

include/stdexec/__detail/__any.hpp

@@ -1508,7 +1508,7 @@ namespace STDEXEC::__any
   struct __bad_any_cast : std::exception
   {
     [[nodiscard]]
-#if __cpp_lib_constexpr_exceptions >= 2025'02L  // constexpr support for std::exception
+#if __cpp_lib_constexpr_exceptions >= 202502L  // constexpr support for std::exception
     constexpr
 #endif
       char const *what() const noexcept override
@@ -1517,7 +1517,7 @@ namespace STDEXEC::__any
     }
   };
 
-#if defined(__cpp_exceptions) && __cpp_exceptions >= 1997'11L
+#if defined(__cpp_exceptions) && __cpp_exceptions >= 199711L
   [[noreturn]]
   inline void __throw_bad_any_cast()
   {

include/stdexec/__detail/__atomic.hpp

@@ -64,7 +64,7 @@ namespace STDEXEC::__std
   using std::atomic_thread_fence;
   using std::atomic_signal_fence;
 
-#  if __cpp_lib_atomic_ref >= 2018'06L
+#  if __cpp_lib_atomic_ref >= 201806L
   using std::atomic_ref;
 #  else
   inline constexpr int __atomic_flag_map[] = {
@@ -109,7 +109,7 @@ namespace STDEXEC::__std
       __atomic_store_n(__ptr_, __desired, __map_memory_order(__order));
     }
   };
-#  endif  // ^^^ __cpp_lib_atomic_ref < 2018'06L
+#  endif  // ^^^ __cpp_lib_atomic_ref < 201806L
 
 #endif  // ^^^ !STDEXEC_HAS_CUDA_STD_ATOMIC()
 
@@ -120,7 +120,7 @@ namespace STDEXEC::__std
                                            : __order;
   }
 
-#if __cpp_lib_atomic_shared_ptr >= 2017'11L && !STDEXEC_HAS_CUDA_STD_ATOMIC()
+#if __cpp_lib_atomic_shared_ptr >= 201711L && !STDEXEC_HAS_CUDA_STD_ATOMIC()
   template <class _Ty>
   using __atomic_shared_ptr = std::atomic<std::shared_ptr<_Ty>>;
 #else
@@ -240,7 +240,7 @@ namespace STDEXEC::__std
   template <typename _Ty>
   __atomic_shared_ptr(std::shared_ptr<_Ty>) -> __atomic_shared_ptr<_Ty>;
 
-#endif  // ^^^ __cpp_lib_atomic_shared_ptr < 2017'11L
+#endif  // ^^^ __cpp_lib_atomic_shared_ptr < 201711L
 
 }  // namespace STDEXEC::__std
 

include/stdexec/__detail/__concepts.hpp

@@ -15,7 +15,7 @@
  */
 #pragma once
 
-#if __cpp_concepts < 2019'07L
+#if __cpp_concepts < 201907L
 #  error This library requires support for C++20 concepts
 #endif
 

include/stdexec/__detail/__config.hpp

@@ -17,7 +17,7 @@
 
 // IWYU pragma: always_keep
 
-#if __cplusplus < 2020'02L
+#if __cplusplus < 202002L
 #  if defined(_MSC_VER) && !defined(__clang__)
 #    error This library requires the use of C++20. Use /Zc:__cplusplus to enable __cplusplus conformance.
 #  else
@@ -114,8 +114,8 @@
 
 // Not all supported compilers have implemented the resolution of CWG 2428 yet.
 // https://cplusplus.github.io/CWG/issues/2428.html
-#if (STDEXEC_CLANG_VERSION >= 19'00) || (STDEXEC_GCC_VERSION >= 13'00)                             \
-  || (STDEXEC_MSVC_VERSION >= 19'44)
+#if (STDEXEC_CLANG_VERSION >= 1900) || (STDEXEC_GCC_VERSION >= 1300)                               \
+  || (STDEXEC_MSVC_VERSION >= 1944)
 #  define STDEXEC_DEPRECATE_CONCEPT(_MSG) [[deprecated(_MSG)]]
 #else
 #  define STDEXEC_DEPRECATE_CONCEPT(_MSG)
@@ -232,7 +232,7 @@ STDEXEC_NAMESPACE_STD_END
 // clang-format on
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
-#if __cpp_impl_coroutine >= 2019'02L && __cpp_lib_coroutine >= 2019'02L
+#if __cpp_impl_coroutine >= 201902L && __cpp_lib_coroutine >= 201902L
 #  include <coroutine>  // IWYU pragma: keep
 #  define STDEXEC_NO_STDCPP_COROUTINES() 0
 namespace STDEXEC::__std
@@ -292,22 +292,22 @@ namespace STDEXEC::__std
 
 #if STDEXEC_NVHPC()
 // NVBUG #4067067: NVHPC does not fully support [[no_unique_address]]
-#  if STDEXEC_NVHPC_VERSION < 23'05
+#  if STDEXEC_NVHPC_VERSION < 2305
 #    define STDEXEC_ATTR_WHICH_3(_ATTR) /*nothing*/
 #  else
 #    define STDEXEC_ATTR_WHICH_3(_ATTR) [[no_unique_address]]
 #  endif
 #elif STDEXEC_CLANG_CL()
 // clang-cl does not support [[no_unique_address]]: https://reviews.llvm.org/D110485
 // TODO: Find the version that started supporting [[msvc::no_unique_address]]
-#  if STDEXEC_CLANG_VERSION < 18'01
+#  if STDEXEC_CLANG_VERSION < 1801
 #    define STDEXEC_ATTR_WHICH_3(_ATTR) /*nothing*/
 #  else
 #    define STDEXEC_ATTR_WHICH_3(_ATTR) [[msvc::no_unique_address]]
 #  endif
 #elif STDEXEC_MSVC()
 // MSVCBUG https://developercommunity.visualstudio.com/t/Incorrect-codegen-when-using-msvc::no_/10452874
-#  if STDEXEC_MSVC_VERSION < 19'43
+#  if STDEXEC_MSVC_VERSION < 1943
 #    define STDEXEC_ATTR_WHICH_3(_ATTR) /*nothing*/
 #  else
 #    define STDEXEC_ATTR_WHICH_3(_ATTR) [[msvc::no_unique_address]]
@@ -438,7 +438,7 @@ namespace STDEXEC::__std
 #  define STDEXEC_IS_TRIVIALLY_COPYABLE(...) std::is_trivially_copyable_v<__VA_ARGS__>
 #endif
 
-#if STDEXEC_HAS_BUILTIN(__is_base_of) || (STDEXEC_MSVC_VERSION >= 19'14)
+#if STDEXEC_HAS_BUILTIN(__is_base_of) || (STDEXEC_MSVC_VERSION >= 1914)
 #  define STDEXEC_IS_BASE_OF(...) __is_base_of(__VA_ARGS__)
 #else
 #  define STDEXEC_IS_BASE_OF(...) std::is_base_of_v<__VA_ARGS__>
@@ -535,7 +535,7 @@ namespace STDEXEC
   inline constexpr bool __same_as_v<_Ap, _Ap> = true;
 }  // namespace STDEXEC
 
-#if defined(__cpp_lib_unreachable) && __cpp_lib_unreachable >= 2022'02L
+#if defined(__cpp_lib_unreachable) && __cpp_lib_unreachable >= 202202L
 #  define STDEXEC_UNREACHABLE() std::unreachable()
 #elif STDEXEC_HAS_BUILTIN(__builtin_unreachable)
 #  define STDEXEC_UNREACHABLE() __builtin_unreachable()
@@ -577,7 +577,7 @@ namespace STDEXEC
 // available. Pack indexing is disabled for clang < 20 because of:
 // https://github.com/llvm/llvm-project/issues/116105
 #if defined(__cpp_pack_indexing) && !STDEXEC_NVCC()                                                \
-  && !(STDEXEC_CLANG() && STDEXEC_CLANG_VERSION < 20'00)
+  && !(STDEXEC_CLANG() && STDEXEC_CLANG_VERSION < 2000)
 #  define STDEXEC_NO_STDCPP_PACK_INDEXING() 0
 #else  // ^^^ has pack indexing ^^^ / vvv no pack indexing vvv
 #  define STDEXEC_NO_STDCPP_PACK_INDEXING() 1
@@ -591,8 +591,8 @@ namespace STDEXEC
 
 // Before clang-16, clang did not like libstdc++'s ranges implementation
 #if __has_include(<ranges>) && \
-  (defined(__cpp_lib_ranges) && __cpp_lib_ranges >= 2019'11L) && \
-  (!STDEXEC_CLANG() || STDEXEC_CLANG_VERSION >= 16'00 || defined(_LIBCPP_VERSION))
+  (defined(__cpp_lib_ranges) && __cpp_lib_ranges >= 201911L) && \
+  (!STDEXEC_CLANG() || STDEXEC_CLANG_VERSION >= 1600 || defined(_LIBCPP_VERSION))
 #  define STDEXEC_NO_STDCPP_RANGES() 0
 #else
 #  define STDEXEC_NO_STDCPP_RANGES() 1
@@ -605,31 +605,31 @@ namespace STDEXEC
 #  define STDEXEC_NO_STDCPP_MEMORY_RESOURCE() 1
 #endif
 
-#if defined(__cpp_lib_execution) && __cpp_lib_execution >= 2016'03L
+#if defined(__cpp_lib_execution) && __cpp_lib_execution >= 201603L
 #  define STDEXEC_NO_STDCPP_EXECUTION_POLICY() 0
 #else
 #  define STDEXEC_NO_STDCPP_EXECUTION_POLICY() 1
 #endif
 
-#if defined(__cpp_lib_execution) && __cpp_lib_execution >= 2019'02L
+#if defined(__cpp_lib_execution) && __cpp_lib_execution >= 201902L
 #  define STDEXEC_NO_STDCPP_UNSEQUENCED_EXECUTION_POLICY() 0
 #else
 #  define STDEXEC_NO_STDCPP_UNSEQUENCED_EXECUTION_POLICY() 1
 #endif
 
-#if defined(__cpp_lib_parallel_algorithm) && __cpp_lib_parallel_algorithm >= 2016'03L
+#if defined(__cpp_lib_parallel_algorithm) && __cpp_lib_parallel_algorithm >= 201603L
 #  define STDEXEC_NO_STDCPP_PARALLEL_ALGORITHMS() 0
 #else
 #  define STDEXEC_NO_STDCPP_PARALLEL_ALGORITHMS() 1
 #endif
 
-#if defined(__cpp_explicit_this_parameter) && (__cpp_explicit_this_parameter >= 2021'10L)
+#if defined(__cpp_explicit_this_parameter) && (__cpp_explicit_this_parameter >= 202110L)
 #  define STDEXEC_NO_STDCPP_EXPLICIT_THIS_PARAMETER() 0
 #else
 #  define STDEXEC_NO_STDCPP_EXPLICIT_THIS_PARAMETER() 1
 #endif
 
-#if defined(__cpp_rtti) && __cpp_rtti >= 1997'11L
+#if defined(__cpp_rtti) && __cpp_rtti >= 199711L
 #  define STDEXEC_NO_STDCPP_RTTI() 0
 #else
 #  define STDEXEC_NO_STDCPP_RTTI() 1
@@ -643,13 +643,13 @@ namespace STDEXEC
 #endif
 
 // Perhaps the stdlib lacks support for concepts
-#if __has_include(<concepts>) && __cpp_lib_concepts >= 2020'02L
+#if __has_include(<concepts>) && __cpp_lib_concepts >= 202002L
 #  define STDEXEC_NO_STDCPP_CONCEPTS_HEADER() 0
 #else
 #  define STDEXEC_NO_STDCPP_CONCEPTS_HEADER() 1
 #endif
 
-#if defined(__cpp_if_consteval) && __cpp_if_consteval >= 2021'06L
+#if defined(__cpp_if_consteval) && __cpp_if_consteval >= 202106L
 #  define STDEXEC_IF_CONSTEVAL     if consteval
 #  define STDEXEC_IF_NOT_CONSTEVAL if !consteval
 #else
@@ -679,7 +679,7 @@ namespace STDEXEC
   }
 
 // GCC 13 implements lexical friendship, but it is incomplete. See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111018
-#if STDEXEC_CLANG()  // || (STDEXEC_GCC() && STDEXEC_GCC_VERSION >= 13'00)
+#if STDEXEC_CLANG()  // || (STDEXEC_GCC() && STDEXEC_GCC_VERSION >= 1300)
 #  define STDEXEC_FRIENDSHIP_IS_LEXICAL() 1
 #else
 #  define STDEXEC_FRIENDSHIP_IS_LEXICAL() 0
@@ -701,7 +701,7 @@ namespace STDEXEC
 #  define STDEXEC_NO_STDCPP_EXCEPTIONS() (__EXCEPTIONS == 0)
 #endif
 
-#if defined(__cpp_constexpr_exceptions) && __cpp_constexpr_exceptions >= 2024'11L
+#if defined(__cpp_constexpr_exceptions) && __cpp_constexpr_exceptions >= 202411L
 #  if !STDEXEC_NO_STDCPP_EXCEPTIONS()
 // https://wg21.link/p3068
 #    define STDEXEC_NO_STDCPP_CONSTEXPR_EXCEPTIONS() 0
@@ -872,7 +872,7 @@ namespace STDEXEC
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 #if STDEXEC_MSVC()
-#  if _MSC_VER >= 19'35
+#  if _MSC_VER >= 1935
 #    define STDEXEC_PRETTY_FUNCTION() __builtin_FUNCSIG()
 #  else
 #    define STDEXEC_PRETTY_FUNCTION() __FUNCSIG__
@@ -881,7 +881,7 @@ namespace STDEXEC
 #  define STDEXEC_PRETTY_FUNCTION() __PRETTY_FUNCTION__
 #endif
 
-#if __cplusplus >= 2022'11L
+#if __cplusplus >= 202211L
 #  define STDEXEC_CONSTEXPR_CXX23        constexpr
 #  define STDEXEC_CONSTEXPR_LOCAL static constexpr
 #else