未找到具有策略执行的 c++ std::accumulate
c++ std::accumulate with policy execution is not found
我想使用 C++17 的新并行工具,但我的电脑没有。
这行得通:
finalOutline.push_back(std::accumulate(intermediateCoefs.begin(), intermediateCoefs.end(),origin,[](sf::Vector2f prev, sf::Vector2f current) {
return sf::Vector2f(current.x + prev.x, current.y + prev.y);
}));
但这不起作用:
finalOutline.push_back(std::accumulate(std::execution::seq, intermediateCoefs.begin(), intermediateCoefs.end(),origin,[](sf::Vector2f prev, sf::Vector2f current) {
return sf::Vector2f(current.x + prev.x, current.y + prev.y);
}));
这里是错误信息:
/home/mbs/Bureau/cplusplusWorkspace/sauvegardeGit/compresse-moi-ces-cercles/src/Model.cpp: In member function ‘void Model::computeFinalOutline(int)’:
/home/mbs/Bureau/cplusplusWorkspace/sauvegardeGit/compresse-moi-ces-cercles/src/Model.cpp:246:47: error: no matching function for call to ‘accumulate(const __pstl::execution::v1::sequenced_policy&, std::vector<sf::Vector2<float> >::iterator, std::vector<sf::Vector2<float> >::iterator, sf::Vector2f&, Model::computeFinalOutline(int)::<lambda(sf::Vector2f, sf::Vector2f)>)’
246 | finalOutline.push_back(std::accumulate(std::execution::seq, intermediateCoefs.begin(), intermediateCoefs.end(),origin,[](sf::Vector2f prev, sf::Vector2f current) {
| ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
247 | return sf::Vector2f(current.x + prev.x, current.y + prev.y);
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
248 | }));
| ~~
我确实包括了需要的东西(我猜):
#include <numeric>
#include <execution>
我执行程序时总是显示__cplusplus的版本,它的值是:202002
这是我的 CMAKE 文件(但我认为它没有用):
cmake_minimum_required(VERSION 3.22) # way overkill
project(Taratari)
set (CMAKE_CXX_STANDARD 20)
set (CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_FLAGS_DEBUG_INIT "-g -Wall -Wextra -pedantic -Werror")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++2a")
include_directories(
$(PROJECT_SOURCE_DIR)/include
$(PROJECT_SOURCE_DIR)/src
)
file(GLOB all_SRCS
"${PROJECT_SOURCE_DIR}/include/*.h"
"${PROJECT_SOURCE_DIR}/src/*.cpp"
)
add_compile_options(
-mavx
)
#sfml
find_package(SFML REQUIRED system graphics network audio window) #too much flag no ?
add_executable(exe ${all_SRCS})
target_link_libraries(exe PRIVATE sfml-audio sfml-graphics sfml-network sfml-system sfml-window)
可以肯定的是,这里是 gcc -v :
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/11/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none:amdgcn-amdhsa
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 11.1.0-1ubuntu1~20.04' --with-bugurl=file:///usr/share/doc/gcc-11/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++,m2 --prefix=/usr --with-gcc-major-version-only --program-suffix=-11 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-bootstrap --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-plugin --enable-default-pie --with-system-zlib --enable-libphobos-checking=release --with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch --disable-werror --disable-cet --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none=/build/gcc-11-2V7zgg/gcc-11-11.1.0/debian/tmp-nvptx/usr,amdgcn-amdhsa=/build/gcc-11-2V7zgg/gcc-11-11.1.0/debian/tmp-gcn/usr --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu --with-build-config=bootstrap-lto-lean --enable-link-serialization=2
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 11.1.0 (Ubuntu 11.1.0-1ubuntu1~20.04)
所以,我不明白发生了什么。我需要一个编译标志吗? (但文档没有提及)。
感谢您的帮助,祝您有愉快的一天:-)
std::accumulate
是为了应用二进制操作 in-order,因此使用执行策略没有任何意义。它没有接受任何重载(参见 https://en.cppreference.com/w/cpp/algorithm/accumulate)。
如果您想允许 out-of-order 评估某些执行策略,请将 std::accumulate
替换为 std::reduce
。 std::reduce
可以假定运算的交换性和结合性,将其重新排序为任何排列,并将其应用于元素的任何分组。
我想使用 C++17 的新并行工具,但我的电脑没有。
这行得通:
finalOutline.push_back(std::accumulate(intermediateCoefs.begin(), intermediateCoefs.end(),origin,[](sf::Vector2f prev, sf::Vector2f current) {
return sf::Vector2f(current.x + prev.x, current.y + prev.y);
}));
但这不起作用:
finalOutline.push_back(std::accumulate(std::execution::seq, intermediateCoefs.begin(), intermediateCoefs.end(),origin,[](sf::Vector2f prev, sf::Vector2f current) {
return sf::Vector2f(current.x + prev.x, current.y + prev.y);
}));
这里是错误信息:
/home/mbs/Bureau/cplusplusWorkspace/sauvegardeGit/compresse-moi-ces-cercles/src/Model.cpp: In member function ‘void Model::computeFinalOutline(int)’:
/home/mbs/Bureau/cplusplusWorkspace/sauvegardeGit/compresse-moi-ces-cercles/src/Model.cpp:246:47: error: no matching function for call to ‘accumulate(const __pstl::execution::v1::sequenced_policy&, std::vector<sf::Vector2<float> >::iterator, std::vector<sf::Vector2<float> >::iterator, sf::Vector2f&, Model::computeFinalOutline(int)::<lambda(sf::Vector2f, sf::Vector2f)>)’
246 | finalOutline.push_back(std::accumulate(std::execution::seq, intermediateCoefs.begin(), intermediateCoefs.end(),origin,[](sf::Vector2f prev, sf::Vector2f current) {
| ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
247 | return sf::Vector2f(current.x + prev.x, current.y + prev.y);
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
248 | }));
| ~~
我确实包括了需要的东西(我猜):
#include <numeric>
#include <execution>
我执行程序时总是显示__cplusplus的版本,它的值是:202002
这是我的 CMAKE 文件(但我认为它没有用):
cmake_minimum_required(VERSION 3.22) # way overkill
project(Taratari)
set (CMAKE_CXX_STANDARD 20)
set (CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_FLAGS_DEBUG_INIT "-g -Wall -Wextra -pedantic -Werror")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++2a")
include_directories(
$(PROJECT_SOURCE_DIR)/include
$(PROJECT_SOURCE_DIR)/src
)
file(GLOB all_SRCS
"${PROJECT_SOURCE_DIR}/include/*.h"
"${PROJECT_SOURCE_DIR}/src/*.cpp"
)
add_compile_options(
-mavx
)
#sfml
find_package(SFML REQUIRED system graphics network audio window) #too much flag no ?
add_executable(exe ${all_SRCS})
target_link_libraries(exe PRIVATE sfml-audio sfml-graphics sfml-network sfml-system sfml-window)
可以肯定的是,这里是 gcc -v :
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/11/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none:amdgcn-amdhsa
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 11.1.0-1ubuntu1~20.04' --with-bugurl=file:///usr/share/doc/gcc-11/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++,m2 --prefix=/usr --with-gcc-major-version-only --program-suffix=-11 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-bootstrap --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-plugin --enable-default-pie --with-system-zlib --enable-libphobos-checking=release --with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch --disable-werror --disable-cet --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none=/build/gcc-11-2V7zgg/gcc-11-11.1.0/debian/tmp-nvptx/usr,amdgcn-amdhsa=/build/gcc-11-2V7zgg/gcc-11-11.1.0/debian/tmp-gcn/usr --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu --with-build-config=bootstrap-lto-lean --enable-link-serialization=2
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 11.1.0 (Ubuntu 11.1.0-1ubuntu1~20.04)
所以,我不明白发生了什么。我需要一个编译标志吗? (但文档没有提及)。
感谢您的帮助,祝您有愉快的一天:-)
std::accumulate
是为了应用二进制操作 in-order,因此使用执行策略没有任何意义。它没有接受任何重载(参见 https://en.cppreference.com/w/cpp/algorithm/accumulate)。
如果您想允许 out-of-order 评估某些执行策略,请将 std::accumulate
替换为 std::reduce
。 std::reduce
可以假定运算的交换性和结合性,将其重新排序为任何排列,并将其应用于元素的任何分组。