[cfe-dev] Understanding clang-format's IncludeIsMainRegex

[Florian Lindner via cfe-dev]

Hey,

Am 05.01.2017 um 15:01 schrieb Eric Liu:
> Hi Florian,
> 
> Note that clang-format only sorts #includes in the same block. If you delete the empty line between the two blocks, clang-format should do the right
> thing for you.

Thanks, that seem to work. Is that documented somewhere? Maybe it should be added.

Best,
Florian

> 
> Cheers,
> Eric
> 
> 
> On Thu, Jan 5, 2017, 12:36 Florian Lindner via cfe-dev <cfe-dev at lists.llvm.org <mailto:cfe-dev at lists.llvm.org>> wrote:
> 
>     Hello,
> 
>     I try to understand the IncludeIsMainRegex setting of clang-format http://releases.llvm.org/3.9.0/tools/clang/docs/ClangFormatStyleOptions.html
> 
>     My cpp file indention.cpp contains includes:
> 
>     #include <string>
> 
>     #include "../precice/src/action/Action.hpp"
>     #include "indention.hpp"
>     #include <boost/array.hpp>
> 
>     Now I try to assess what affect IncludeIsMainRegex has:
> 
>     1) IncludeIsMainRegex: '$' (default for style LLVM)
> 
>     clang-format -style=file indention.cpp
>     shows no effect
> 
>     neither do
> 
>     2) IncludeIsMainRegex: ''
>     3) IncludeIsMainRegex: 'hpp$'
>     4) IncludeIsMainRegex: '\.hpp$
>     5) IncludeIsMainRegex: '.hpp$
> 
> 
>     According to the documentation I expected that 2 and 3 match the suffix and assign category 0 to the include, thus placing it at the top.
> 
>     Where is my understanding wrong?
> 
>     Thanks,
>     Florian
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