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/**
 * \file
 * Detect compiler information.
 */

#pragma once

// For _CCCL_IMPLICIT_SYSTEM_HEADER
#include <cuda/__cccl_config>

#if defined(_CCCL_IMPLICIT_SYSTEM_HEADER_GCC)
#  pragma GCC system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_CLANG)
#  pragma clang system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_MSVC)
#  pragma system_header
#endif // no system header

// enumerate host compilers we know about
//! deprecated [Since 2.7]
#define CUB_HOST_COMPILER_UNKNOWN 0
//! deprecated [Since 2.7]
#define CUB_HOST_COMPILER_MSVC 1
//! deprecated [Since 2.7]
#define CUB_HOST_COMPILER_GCC 2
//! deprecated [Since 2.7]
#define CUB_HOST_COMPILER_CLANG 3

// enumerate device compilers we know about
//! deprecated [Since 2.7]
#define CUB_DEVICE_COMPILER_UNKNOWN 0
//! deprecated [Since 2.7]
#define CUB_DEVICE_COMPILER_MSVC 1
//! deprecated [Since 2.7]
#define CUB_DEVICE_COMPILER_GCC 2
//! deprecated [Since 2.7]
#define CUB_DEVICE_COMPILER_NVCC 3
//! deprecated [Since 2.7]
#define CUB_DEVICE_COMPILER_CLANG 4

// figure out which host compiler we're using
#if defined(_CCCL_COMPILER_MSVC)
//! deprecated [Since 2.7]
#  define CUB_HOST_COMPILER CUB_HOST_COMPILER_MSVC
//! deprecated [Since 2.7]
#  define CUB_MSVC_VERSION _CCCL_MSVC_VERSION
//! deprecated [Since 2.7]
#  define CUB_MSVC_VERSION_FULL _CCCL_MSVC_VERSION_FULL
#elif defined(_CCCL_COMPILER_CLANG)
//! deprecated [Since 2.7]
#  define CUB_HOST_COMPILER CUB_HOST_COMPILER_CLANG
//! deprecated [Since 2.7]
#  define CUB_CLANG_VERSION _CCCL_CLANG_VERSION
#elif defined(_CCCL_COMPILER_GCC)
//! deprecated [Since 2.7]
#  define CUB_HOST_COMPILER CUB_HOST_COMPILER_GCC
//! deprecated [Since 2.7]
#  define CUB_GCC_VERSION   _CCCL_GCC_VERSION
#endif

// figure out which device compiler we're using
#if defined(_CCCL_CUDA_COMPILER_NVCC) || defined(_CCCL_CUDA_COMPILER_NVHPC)
//! deprecated [Since 2.7]
#  define CUB_DEVICE_COMPILER CUB_DEVICE_COMPILER_NVCC
#elif defined(_CCCL_COMPILER_MSVC)
//! deprecated [Since 2.7]
#  define CUB_DEVICE_COMPILER CUB_DEVICE_COMPILER_MSVC
#elif defined(_CCCL_COMPILER_GCC)
//! deprecated [Since 2.7]
#  define CUB_DEVICE_COMPILER CUB_DEVICE_COMPILER_GCC
#elif defined(_CCCL_COMPILER_CLANG)
// CUDA-capable clang should behave similar to NVCC.
#  if defined(_CCCL_CUDA_COMPILER_NVCC)
//! deprecated [Since 2.7]
#    define CUB_DEVICE_COMPILER CUB_DEVICE_COMPILER_NVCC
#  else
//! deprecated [Since 2.7]
#    define CUB_DEVICE_COMPILER CUB_DEVICE_COMPILER_CLANG
#  endif
#else
//! deprecated [Since 2.7]
#  define CUB_DEVICE_COMPILER CUB_DEVICE_COMPILER_UNKNOWN
#endif