Re: [boost] boost.org Source-Code, Concepts & Idioms.

Subject: Re: [boost] boost.org Source-Code, Concepts & Idioms.
From: Jonas Persson (l.j.persson_at_[hidden])
Date: 2008-10-14 17:29:52

Hartmut Kaiser skrev:
 > If you have a list of macros to leave untouched it is easily implemented.
 > All you (somebody) will have to do is to modify the
 > expanding_function_like_macro() and expanding_object_like_macro()
 > preprocessing hooks to return true for all macros Wave shouldn't 
touch (see
 > tools/wave/trace_macro_expansion.hpp).
 >
Is there also a hook to decide if an #if #else expression should be 
evaluated or left as it is?

 > You probably don't want system headers to be expanded, though. As long as
 > you don't care about the defined macros in those headers you can skip
 > processing of certain include directives the same way as above: 
change the
 > found_include_directive() preprocessing hook to return true for the
 > #include's to skip.
 >
Are you saying that we need to inline the headers or wave wont see the 
macro definitions?
Would it be possible to split the parsing of includes from the inline 
expansion?

I expect that we do need the defined macros from included files if we 
want everything correctly evaluated. But if it is to be readable no 
headers should be expanded. We want the source files to look like hand 
written code.

   / Jonas