Implementing C preprocessor

Question

I am implementing a C preprocessor...

On Wiki, I found the following functionalities of it...

• Trigraph replacement
• Line splicing
• Tokenization
• Macro expansion and directive handling
• File Inclusion

My questions:

• Am I missing any functionality?
• What is the correct sequence of execution of the above functionalities? (i.e. what is done before what in today's practical preprocessors?)

If anyone knows any standard doc' about it, please mention that too.

Answer 1

You may want to check out the gcc docs to see how they implement it: http://gcc.gnu.org/onlinedocs/cpp/

You could also have a look at the source code for gcc: http://www.gnu.org/software/gcc/releases.html

Hope this helps

Answer 2

The standard doc is the C standard! The official versions are non-free, but you can find drafts that are sufficiently accurate, e.g. http://www.open-std.org/jtc1/sc22/WG14/www/docs/n1256.pdf for C99.

The chapters of interest are 5.1.1.2 (Translation phases) and 6.10 (Preprocessing directives).