support -dM - Githubissues

mycoboco / beluga

a standard C compiler (with an integrated preprocessor)

http://code.woong.org/beluga

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support -dM #127

Closed mycoboco closed 6 years ago

mycoboco commented 6 years ago

Instead of the normal output, generate a list of ‘#define’ directives for all the macros defined during the execution of the preprocessor, including predefined macros. This gives you a way of finding out what is predefined in your version of the preprocessor. Assuming you have no file ‘foo.h’, the command
touch foo.h; cpp -dM foo.h
shows all the predefined macros.

mycoboco commented 6 years ago

Need to handle:

[x] variadic macro
[x] optional comma
[x] dynamic macros
[x] trailing spaces