pragma

Code folding (#pragma region) in Qt creator

由 梦想与她 提交于 2019-12-08 15:30:22
问题 Is there something similar to explicit code regions for folding in Qt Creator: #pragma region Region_1 void Test() {} void Test2() {} void Test3() {} #pragma endregion Region_1 I can see folding for logical code blocks, but do not know how to explicitly set such a block. My version of Qt Creator is 2.4.1 回答1: Currently not. I think it is better to structure your code by using code anyways. The regions as also found in C# are imho a bad substitute for proper structuring and keeping things

find code causing warning 4503 in VC++

由 偶尔善良 提交于 2019-12-08 13:17:26
I'm trying to track down the source of this large warning in a big code base: C:\Program Files (x86)\Microsoft Visual Studio 12.\VC\INCLUDE\xmemory0(592) : warning C4503: 'std::_Tree<std::_Tmap_traits<_Kty,_Ty,_Pr,_Alloc,false>>::_Insert_at' : decorated name length exceeded, name was truncated with [ _Kty=epmem_node_id, _Ty=std::map<std::string,std::list<std::string,std::allocator<std::string>>,std::less<std::string>,std::allocator<std::pair<const std::string,std::list<std::string,std::allocator<std::string>>>>>, _Pr=std::less<epmem_node_id>, _Alloc=std::allocator<std::pair<const epmem_node_id

find code causing warning 4503 in VC++

由 我与影子孤独终老i 提交于 2019-12-08 05:55:21
问题 I'm trying to track down the source of this large warning in a big code base: C:\Program Files (x86)\Microsoft Visual Studio 12.\VC\INCLUDE\xmemory0(592) : warning C4503: 'std::_Tree<std::_Tmap_traits<_Kty,_Ty,_Pr,_Alloc,false>>::_Insert_at' : decorated name length exceeded, name was truncated with [ _Kty=epmem_node_id, _Ty=std::map<std::string,std::list<std::string,std::allocator<std::string>>,std::less<std::string>,std::allocator<std::pair<const std::string,std::list<std::string,std:

Why and when do we need to use #pragma [closed]

由 妖精的绣舞 提交于 2019-12-08 01:15:36
问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 6 years ago . I was learning a winsock client server program and came up through #pragma comment(lib,"ws2_32.lib") . Understood its need here. But what are the other instances I can use it and why do I need to use it? 回答1: #pragma 's are implementation defined compiler commands. That means,

Can the pre-processor directives like #include be placed only at the top of the program code?

由 最后都变了- 提交于 2019-12-07 09:46:12
问题 I have used the #pragma directive inside functions without error or warning(especially #pragma pack() ).But the following code shows the warning incompatible implicit declaration of built-in function 'printf'| : int main(void) { printf("Trial"); } #include<stdio.h> Further, here's is an extract from a book I have.The author has bad reviews on SO,especially for his generous use of void main() ,but still I feel no author can be that bad to claim the following without reason: Each of these

Issuing PRAGMA statement in AIR app

由 梦想的初衷 提交于 2019-12-06 22:06:36
When I use the flash.data routines to issue a SQLite "PRAGMA encoding" statement, I get an error suggesting that this isn't supported: 'Error #3115: SQL Error.', details:'PRAGMA is not allowed in SQL.', operation:'execute', detailID:'2005 Is there a workaround? Don In a word no. See for supported and unsupported features. http://help.adobe.com/en_US/as3/dev/WSd47bd22bdd97276f1365b8c112629d7c47c-8000.html#WSd47bd22bdd97276f-5741a41a1262b2de46b-8000 . However on that page however you will see... System table access is not available The system tables including sqlite_master and other tables with

Any way in Visual Studio to not break on throwing of a specific exception?

由 故事扮演 提交于 2019-12-06 20:29:21
问题 Is there a pragma or debugger attribute which will allow the debugger to not break on the throwing of a specific exception even though under the Debug >> Exceptions menu I've told it to break when any CLR Exceptions are throw? In general while developing I like to have it break on exceptions while debugging so that I can immediately inspect them. Sometimes there are some isolated cases where it is known that this block of code occasionally throws exceptions and I've handled it in with a try

Is is possible to disable this warning in clang? warning: #pragma once in main file

由 烈酒焚心 提交于 2019-12-06 17:10:56
问题 warning: #pragma once in main file We're running our headers through clang to get a partial AST. Is it possible to disable that warning? 回答1: Use the -Wno-pragma-once-outside-header command line argument. Consult the Clang documentation here. 回答2: I had this thing when I accidentally included a header file in compile sources (this header has #pragma once line). To fix this remove header from compile sources (and probably you need to replace it with .cpp file) 回答3: There's no -W option for "

How to put a warning disable pragma inside a macro gcc

由 冷暖自知 提交于 2019-12-06 08:56:43
I need to disable a warning that originates inside the macro '__LOG_W' in following code. To do that, I wrapped this macro inside another macro 'LOG_W' and disabled the warning '-Wold-style-cast' with in that. Then in the code I used the LOG_W instead. However I still get the warning and unable to find out why. Any pointers appreciated. #define LOG_W(expr)\ _Pragma("GCC diagnostic push")\ _Pragma("GCC diagnostic ignored \"-Wold-style-cast\"")\ __LOG_W(DEF, UNKNOWN, expr);\ _Pragma("GCC diagnostic pop") 来源： https://stackoverflow.com/questions/24681881/how-to-put-a-warning-disable-pragma-inside

Diferences between pragmas simd and ivdep vector always?

由 末鹿安然 提交于 2019-12-06 06:08:31
问题 I am currently trying to vectorize a program and i have observed an odd behaviour Seems that a for loop is vectorized when using #pragma simd (262): (col. 3) remark: SIMD LOOP WAS VECTORIZED. but it doesn't when i use #pragma vector always #pragma ivdep (262): (col. 3) remark: loop was not vectorized: existence of vector dependence. I always thought that both sentences do the same vectorization 回答1: Pragma SIMD is a explicit vectorization tool given to the developer to enforce vectorization
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