<string> bloating compile time
Author
I use std::string all over my code,the down dise is that it bloats my compile time. Is there a way of typedef''ing it declaring it without having to include the string header?
Like you can do this:
class CFile;
If you don''t want to include the file the CFile is in.
Many thanks
Chris
Are you using pre-compilered headers? put #include<string> in StfAfx.h
I've never done a forward reference with a template, lemme know how it works if you fgure it out.
class std::string; ??
Magmai Kai Holmlor
- The disgruntled & disillusioned
Edited by - Magmai Kai Holmlor on March 18, 2001 8:57:14 PM
I've never done a forward reference with a template, lemme know how it works if you fgure it out.
class std::string; ??
Magmai Kai Holmlor
- The disgruntled & disillusioned
Edited by - Magmai Kai Holmlor on March 18, 2001 8:57:14 PM
Should be ok to use a forward reference, if you do it properly. Might be a bit of a hassle though.
Check out <iosfwd> to see how they made forward declarations for the iostream classes, and maybe that''ll give you a hint at how to do it for std::strings.
Check out <iosfwd> to see how they made forward declarations for the iostream classes, and maybe that''ll give you a hint at how to do it for std::strings.
I have a more general question along this same subject:
Is there any way to tell what parts of your program are causing the largest compile times? We have several projects here that have grown over the months and now take a significant time to compile; however, we can''t really track down what code is causing it. Any hints?
Is there any way to tell what parts of your program are causing the largest compile times? We have several projects here that have grown over the months and now take a significant time to compile; however, we can''t really track down what code is causing it. Any hints?
quote:Original post by Stoffel
I have a more general question along this same subject:
Is there any way to tell what parts of your program are causing the largest compile times? We have several projects here that have grown over the months and now take a significant time to compile; however, we can''t really track down what code is causing it. Any hints?
That''s an interesting idea. VC++ VBscript allows events handling when a build occurs/ends. That might be useful when combined with a custom build step (AddCustomBuildStepToFile).
Let me know if you come up with anything.
quote:Original post by Kylotan
Should be ok to use a forward reference, if you do it properly. Might be a bit of a hassle though.
Check out to see how they made forward declarations for the iostream classes, and maybe that''ll give you a hint at how to do it for std::strings.
You have a solution???
The iosfwd seems to redefine a template class with the traits and allocators and do a typedef of the iostream.
Author
class std::string doersn''t work
error C2242: typedef name cannot follow class/struct/union
Stoffel, if your application is broken up in to different libraries each sections compile time can be measured by appending this to your command line for msdev:
/Y3
That''ll give you output that looks like this:
Compiling...
Main Win32.cpp
Application.cpp
Spawn Time 0:02.5
Creating library...
Spawn Time 0:00.0
Application.lib - 0 error(s), 0 warning(s)
Build Time 0:02.8
Kylotan, I had a look in there, your right it is a bit ugly, I''m not sure if I''m up to this task.
Precompiled headers look good and have been getting a good wrap on the Algorithms mailing list recently too. I spent a good hour today trying to get them working however and didn''t get anywhere.
What I did:
1) Create STL.h, STL.cpp
2) added #includes for vector, map, etc, etc,..
3) Added Include for Stl.h in to stl.cpp.
4) Set compiler option for this file to "Create pch though" : stl.h
5) Set project to "use pch through" : stl.h
6) Replace a few #include ''s with #include "Stl.h"
This seems to produce a huge number of errors in files that dont even use stl.h. Is this technique wrong? Did I miss something?
Thanks
error C2242: typedef name cannot follow class/struct/union
Stoffel, if your application is broken up in to different libraries each sections compile time can be measured by appending this to your command line for msdev:
/Y3
That''ll give you output that looks like this:
Compiling...
Main Win32.cpp
Application.cpp
Spawn Time 0:02.5
Creating library...
Spawn Time 0:00.0
Application.lib - 0 error(s), 0 warning(s)
Build Time 0:02.8
Kylotan, I had a look in there, your right it is a bit ugly, I''m not sure if I''m up to this task.
Precompiled headers look good and have been getting a good wrap on the Algorithms mailing list recently too. I spent a good hour today trying to get them working however and didn''t get anywhere.
What I did:
1) Create STL.h, STL.cpp
2) added #includes for vector, map, etc, etc,..
3) Added Include for Stl.h in to stl.cpp.
4) Set compiler option for this file to "Create pch though" : stl.h
5) Set project to "use pch through" : stl.h
6) Replace a few #include ''s with #include "Stl.h"
This seems to produce a huge number of errors in files that dont even use stl.h. Is this technique wrong? Did I miss something?
Thanks
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