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Merged
davebayer merged 2 commits into from
Dec 12, 2025
Merged

Expose <cuda/std/charconv> #6672

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555af3d
Expose `<cuda/std/charconv>`
davebayer Nov 18, 2025
ade8612
update docs
davebayer Nov 24, 2025
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17 changes: 17 additions & 0 deletions libcudacxx/include/cuda/std/__charconv/from_chars.h
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Expand Up @@ -22,11 +22,14 @@

#include <cuda/__cmath/neg.h>
#include <cuda/__cmath/uabs.h>
#include <cuda/std/__charconv/chars_format.h>
#include <cuda/std/__charconv/from_chars_result.h>
#include <cuda/std/__concepts/concept_macros.h>
#include <cuda/std/__cstddef/types.h>
#include <cuda/std/__limits/numeric_limits.h>
#include <cuda/std/__type_traits/always_false.h>
#include <cuda/std/__type_traits/conditional.h>
#include <cuda/std/__type_traits/is_floating_point.h>
#include <cuda/std/__type_traits/is_integer.h>
#include <cuda/std/__type_traits/is_same.h>
#include <cuda/std/__type_traits/is_signed.h>
Expand Down Expand Up @@ -147,6 +150,20 @@ from_chars(const char* __first, const char* __last, char& __value, int __base =
return __ret;
}

_CCCL_TEMPLATE(class _Tp)
_CCCL_REQUIRES(is_floating_point_v<_Tp>)
[[nodiscard]] _CCCL_API constexpr from_chars_result
from_chars(const char* __first, const char* __last, _Tp& __value, chars_format __fmt = chars_format::general) noexcept
{
static_assert(::cuda::std::__always_false_v<_Tp>,
"cuda::std::from_chars for floating point types is not yet implemented");
(void) __first;
(void) __last;
(void) __value;
(void) __fmt;
return {};
}

_CCCL_END_NAMESPACE_CUDA_STD

#include <cuda/std/__cccl/epilogue.h>
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44 changes: 44 additions & 0 deletions libcudacxx/include/cuda/std/__charconv/to_chars.h
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Expand Up @@ -21,10 +21,13 @@
#endif // no system header

#include <cuda/__cmath/uabs.h>
#include <cuda/std/__charconv/chars_format.h>
#include <cuda/std/__charconv/to_chars_result.h>
#include <cuda/std/__concepts/concept_macros.h>
#include <cuda/std/__cstddef/types.h>
#include <cuda/std/__type_traits/always_false.h>
#include <cuda/std/__type_traits/conditional.h>
#include <cuda/std/__type_traits/is_floating_point.h>
#include <cuda/std/__type_traits/is_integer.h>
#include <cuda/std/__type_traits/is_same.h>
#include <cuda/std/__type_traits/is_signed.h>
Expand Down Expand Up @@ -141,6 +144,47 @@ to_chars(char* __first, char* __last, char __value, int __base = 10) noexcept

_CCCL_API constexpr to_chars_result to_chars(char*, char*, bool, int = 10) noexcept = delete;

_CCCL_TEMPLATE(class _Tp)
_CCCL_REQUIRES(is_floating_point_v<_Tp>)
[[nodiscard]] _CCCL_API constexpr to_chars_result to_chars(char* __first, char* __last, _Tp __value) noexcept
{
static_assert(::cuda::std::__always_false_v<_Tp>,
"cuda::std::to_chars for floating point types is not yet implemented");
(void) __first;
(void) __last;
(void) __value;
return {};
}

_CCCL_TEMPLATE(class _Tp)
_CCCL_REQUIRES(is_floating_point_v<_Tp>)
[[nodiscard]] _CCCL_API constexpr to_chars_result
to_chars(char* __first, char* __last, _Tp __value, chars_format __fmt) noexcept
{
static_assert(::cuda::std::__always_false_v<_Tp>,
"cuda::std::to_chars for floating point types is not yet implemented");
(void) __first;
(void) __last;
(void) __value;
(void) __fmt;
return {};
}

_CCCL_TEMPLATE(class _Tp)
_CCCL_REQUIRES(is_floating_point_v<_Tp>)
[[nodiscard]] _CCCL_API constexpr to_chars_result
to_chars(char* __first, char* __last, _Tp __value, chars_format __fmt, int __prec) noexcept
{
static_assert(::cuda::std::__always_false_v<_Tp>,
"cuda::std::to_chars for floating point types is not yet implemented");
(void) __first;
(void) __last;
(void) __value;
(void) __fmt;
(void) __prec;
return {};
}

_CCCL_END_NAMESPACE_CUDA_STD

#include <cuda/std/__cccl/epilogue.h>
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2 changes: 1 addition & 1 deletion libcudacxx/include/cuda/std/__charconv_ → libcudacxx/include/cuda/std/charconv
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Expand Up @@ -4,7 +4,7 @@
// 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
// SPDX-FileCopyrightText: Copyright (c) 2024 NVIDIA CORPORATION & AFFILIATES.
// SPDX-FileCopyrightText: Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES.
//
//===----------------------------------------------------------------------===//

Expand Down
2 changes: 1 addition & 1 deletion libcudacxx/test/libcudacxx/std/text/charconv/charconv.from.chars/integral/int128.pass.cpp
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Expand Up @@ -8,8 +8,8 @@
//
//===----------------------------------------------------------------------===//

#include <cuda/std/__charconv_>
#include <cuda/std/array>
#include <cuda/std/charconv>
#include <cuda/std/cstddef>
#include <cuda/std/cstdint>
#include <cuda/std/cstring>
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2 changes: 1 addition & 1 deletion libcudacxx/test/libcudacxx/std/text/charconv/charconv.from.chars/integral/int16.pass.cpp
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Expand Up @@ -8,8 +8,8 @@
//
//===----------------------------------------------------------------------===//

#include <cuda/std/__charconv_>
#include <cuda/std/array>
#include <cuda/std/charconv>
#include <cuda/std/cstddef>
#include <cuda/std/cstdint>
#include <cuda/std/cstring>
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2 changes: 1 addition & 1 deletion libcudacxx/test/libcudacxx/std/text/charconv/charconv.from.chars/integral/int32.pass.cpp
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Expand Up @@ -10,8 +10,8 @@

// CONSTEXPR_STEPS: 15000000

#include <cuda/std/__charconv_>
#include <cuda/std/array>
#include <cuda/std/charconv>
#include <cuda/std/cstddef>
#include <cuda/std/cstdint>
#include <cuda/std/cstring>
Expand Down
2 changes: 1 addition & 1 deletion libcudacxx/test/libcudacxx/std/text/charconv/charconv.from.chars/integral/int64.pass.cpp
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Expand Up @@ -8,8 +8,8 @@
//
//===----------------------------------------------------------------------===//

#include <cuda/std/__charconv_>
#include <cuda/std/array>
#include <cuda/std/charconv>
#include <cuda/std/cstddef>
#include <cuda/std/cstdint>
#include <cuda/std/cstring>
Expand Down
2 changes: 1 addition & 1 deletion libcudacxx/test/libcudacxx/std/text/charconv/charconv.from.chars/integral/int8.pass.cpp
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Expand Up @@ -8,8 +8,8 @@
//
//===----------------------------------------------------------------------===//

#include <cuda/std/__charconv_>
#include <cuda/std/array>
#include <cuda/std/charconv>
#include <cuda/std/cstddef>
#include <cuda/std/cstdint>
#include <cuda/std/cstring>
Expand Down
2 changes: 1 addition & 1 deletion libcudacxx/test/libcudacxx/std/text/charconv/charconv.syn/chars_format.pass.cpp
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Expand Up @@ -7,8 +7,8 @@
//
//===----------------------------------------------------------------------===//

#include <cuda/std/__charconv_>
#include <cuda/std/cassert>
#include <cuda/std/charconv>
#include <cuda/std/type_traits>

__host__ __device__ constexpr bool test()
Expand Down
2 changes: 1 addition & 1 deletion libcudacxx/test/libcudacxx/std/text/charconv/charconv.syn/from_chars_result.pass.cpp
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Expand Up @@ -7,8 +7,8 @@
//
//===----------------------------------------------------------------------===//

#include <cuda/std/__charconv_>
#include <cuda/std/cassert>
#include <cuda/std/charconv>
#include <cuda/std/type_traits>

__host__ __device__ constexpr void test_members()
Expand Down
2 changes: 1 addition & 1 deletion libcudacxx/test/libcudacxx/std/text/charconv/charconv.syn/to_chars_result.pass.cpp
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Expand Up @@ -7,8 +7,8 @@
//
//===----------------------------------------------------------------------===//

#include <cuda/std/__charconv_>
#include <cuda/std/cassert>
#include <cuda/std/charconv>
#include <cuda/std/type_traits>

__host__ __device__ constexpr void test_members()
Expand Down
2 changes: 1 addition & 1 deletion libcudacxx/test/libcudacxx/std/text/charconv/charconv.to.chars/integral/bool.fail.cpp
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Expand Up @@ -8,7 +8,7 @@
//
//===----------------------------------------------------------------------===//

#include <cuda/std/__charconv_>
#include <cuda/std/charconv>

int main(int, char**)
{
Expand Down
2 changes: 1 addition & 1 deletion libcudacxx/test/libcudacxx/std/text/charconv/charconv.to.chars/integral/int128.pass.cpp
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Expand Up @@ -8,8 +8,8 @@
//
//===----------------------------------------------------------------------===//

#include <cuda/std/__charconv_>
#include <cuda/std/array>
#include <cuda/std/charconv>
#include <cuda/std/cstddef>
#include <cuda/std/cstdint>
#include <cuda/std/cstring>
Expand Down
2 changes: 1 addition & 1 deletion libcudacxx/test/libcudacxx/std/text/charconv/charconv.to.chars/integral/int16.pass.cpp
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Expand Up @@ -8,8 +8,8 @@
//
//===----------------------------------------------------------------------===//

#include <cuda/std/__charconv_>
#include <cuda/std/array>
#include <cuda/std/charconv>
#include <cuda/std/cstddef>
#include <cuda/std/cstdint>
#include <cuda/std/cstring>
Expand Down
2 changes: 1 addition & 1 deletion libcudacxx/test/libcudacxx/std/text/charconv/charconv.to.chars/integral/int32.pass.cpp
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Expand Up @@ -8,8 +8,8 @@
//
//===----------------------------------------------------------------------===//

#include <cuda/std/__charconv_>
#include <cuda/std/array>
#include <cuda/std/charconv>
#include <cuda/std/cstddef>
#include <cuda/std/cstdint>
#include <cuda/std/cstring>
Expand Down
2 changes: 1 addition & 1 deletion libcudacxx/test/libcudacxx/std/text/charconv/charconv.to.chars/integral/int64.pass.cpp
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Expand Up @@ -8,8 +8,8 @@
//
//===----------------------------------------------------------------------===//

#include <cuda/std/__charconv_>
#include <cuda/std/array>
#include <cuda/std/charconv>
#include <cuda/std/cstddef>
#include <cuda/std/cstdint>
#include <cuda/std/cstring>
Expand Down
2 changes: 1 addition & 1 deletion libcudacxx/test/libcudacxx/std/text/charconv/charconv.to.chars/integral/int8.pass.cpp
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Expand Up @@ -8,8 +8,8 @@
//
//===----------------------------------------------------------------------===//

#include <cuda/std/__charconv_>
#include <cuda/std/array>
#include <cuda/std/charconv>
#include <cuda/std/cstddef>
#include <cuda/std/cstdint>
#include <cuda/std/cstring>
Expand Down