Add .gitignore

[rodgert]

Summary

The makefile spews build artifacts into the build/ directory, ignore
them.

[rodgert]

• Add ifdef guards for parallel overloads

[rodgert]

• Introduce forward definitions

[rodgert]

• Remove unused include

[ldionne]

.gitignore

2

I don't have this problem, but I don't mind. But you can also put whatever you want in .git/info/exclude for things that should be ignored only on your machine.

[rodgert]

• Introduce forward declaratoins
• Deprecate non-cmake build and test suite

[rodgert]

I'm going to resubmit this as a set of smaller patches

.gitignore

+build/*.exe
+build/*.o
 No newline at end of file

include/pstl/internal/algorithm_impl.h

 template <class _ExecutionPolicy, class _OutputIterator, class _Size, class _Tp, class _IsVector>
 _OutputIterator
 pattern_fill_n(_ExecutionPolicy&&, _OutputIterator __first, _Size __count, const _Tp& __value,
                /*is_parallel=*/std::false_type, _IsVector __is_vector) noexcept
 {
     return internal::brick_fill_n(__first, __count, __value, __is_vector);
 }
 
+#if __PSTL_USE_PAR_POLICIES
 template <class _ExecutionPolicy, class _OutputIterator, class _Size, class _Tp, class _IsVector>
 _OutputIterator
 pattern_fill_n(_ExecutionPolicy&& __exec, _OutputIterator __first, _Size __count, const _Tp& __value,
                /*is_parallel=*/std::true_type, _IsVector __is_vector)
 {
     return internal::pattern_fill(std::forward<_ExecutionPolicy>(__exec), __first, __first + __count, __value,
                                   std::true_type(), __is_vector);
 }
+#endif
 
 //------------------------------------------------------------------------
 // generate, generate_n
 //------------------------------------------------------------------------
 template <class _RandomAccessIterator, class _Generator>
 void
 brick_generate(_RandomAccessIterator __first, _RandomAccessIterator __last, _Generator __g,
                /* is_vector = */ std::true_type) noexcept

 template <class _ExecutionPolicy, class _OutputIterator, class _Size, class _Generator, class _IsVector>
 _OutputIterator
 pattern_generate_n(_ExecutionPolicy&&, _OutputIterator __first, _Size __count, _Generator __g,
                    /*is_parallel=*/std::false_type, _IsVector __is_vector) noexcept
 {
     return internal::brick_generate_n(__first, __count, __g, __is_vector);
 }
 
+#if __PSTL_USE_PAR_POLICIES
 template <class _ExecutionPolicy, class _OutputIterator, class _Size, class _Generator, class _IsVector>
 _OutputIterator
 pattern_generate_n(_ExecutionPolicy&& __exec, _OutputIterator __first, _Size __count, _Generator __g,
                    /*is_parallel=*/std::true_type, _IsVector __is_vector)
 {
     static_assert(internal::is_random_access_iterator<_OutputIterator>::value,
                   "Pattern-brick error. Should be a random access iterator.");
     return internal::pattern_generate(std::forward<_ExecutionPolicy>(__exec), __first, __first + __count, __g,
                                       std::true_type(), __is_vector);
 }
+#endif
 
 //------------------------------------------------------------------------
 // remove
 //------------------------------------------------------------------------
 
 template <class _ForwardIterator, class _UnaryPredicate>
 _ForwardIterator
 brick_remove_if(_ForwardIterator __first, _ForwardIterator __last, _UnaryPredicate __pred,

include/pstl/internal/numeric_impl.h

 // -*- C++ -*-
 //===-- numeric_impl.h ----------------------------------------------------===//
 //
 // 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 __PSTL_numeric_impl_H
 #define __PSTL_numeric_impl_H
 
 #include <iterator>
 #include <type_traits>
 #include <numeric>
 
-#include "pstl_config.h"
 #include "execution_impl.h"
 #include "unseq_backend_simd.h"
 
 #if __PSTL_USE_PAR_POLICIES
 #include "parallel_backend.h"
 #endif
 
 namespace __pstl