Question

因此，当我尝试构建c ++应用程序时，在以下代码段中会出现编译时错误

static_assert(sizeof(int32_t) == 4)

这是我得到expected string-literal before ‘)’

的错误

在一些调查中，我发现static_assert在c ++ 11中需要一个消息参数，而在c ++ 17中已将其消除。看起来我的应用程序正在为c ++ 11编译吗？

在我的CMakeLists.txt文件中，以下几行

set(CMAKE_CXX_STANDARD 17)              
set(CMAKE_CXX_STANDARD_REQUIRED ON)

以上几行不是应该为c ++ 17构建我的应用程序吗？

谢谢！

Update1-完整错误跟踪

In file included from <project_root>/src/include/buffer/buffer_pool_manager.h:22:0,
                 from <project_root>/src/include/catalog/simple_catalog.h:8,
                 from <project_root>/src/include/catalog/table_generator.h:6,
                 from <project_root>/src/catalog/table_generator.cpp:1:
<project_root>/src/include/storage/page/page.h:70:39: error: expected ‘,’ before ‘)’ token
   static_assert(sizeof(page_id_t) == 4);
                                       ^
<project_root>/src/include/storage/page/page.h:70:39: error: expected string-literal before ‘)’ token
In file included from <project_root>/src/include/buffer/buffer_pool_manager.h:22:0,
                 from <project_root>/src/buffer/buffer_pool_manager.cpp:13:
<project_root>/src/include/storage/page/page.h:70:39: error: expected ‘,’ before ‘)’ token
   static_assert(sizeof(page_id_t) == 4);
                                       ^
<project_root>/src/include/storage/page/page.h:70:39: error: expected string-literal before ‘)’ token
src/CMakeFiles/bustub_shared.dir/build.make:62: recipe for target 'src/CMakeFiles/bustub_shared.dir/buffer/buffer_pool_manager.cpp.o' failed
make[2]: *** [src/CMakeFiles/bustub_shared.dir/buffer/buffer_pool_manager.cpp.o] Error 1
make[2]: *** Waiting for unfinished jobs....
src/CMakeFiles/bustub_shared.dir/build.make:114: recipe for target 'src/CMakeFiles/bustub_shared.dir/catalog/table_generator.cpp.o' failed
make[2]: *** [src/CMakeFiles/bustub_shared.dir/catalog/table_generator.cpp.o] Error 1
CMakeFiles/Makefile2:383: recipe for target 'src/CMakeFiles/bustub_shared.dir/all' failed
make[1]: *** [src/CMakeFiles/bustub_shared.dir/all] Error 2
Makefile:140: recipe for target 'all' failed
make: *** [all] Error 2

Answer 1

我将其更改为gcc-7，而g ++-7解决了我的问题。

在c ++ 17中使用static_assert时，预期在'）'之前的字符串文字

1 个答案: