Saturday, February 2, 2008

c++ header file === #define

Whenever you see ANY "header file", think of #define. It's the same copy-paste process. It's the same pre-processor. You ship object files not header files to your users, because header files are not referenced at runtime.

---------- Forwarded message ----------
From: Chuck

Hi,

  The trick to header files is that they are nothing but string substitution. If you copied the contents of the header inline in the file where the include directive is, you get exactly the same result. One little trick that can help is, the compiler will take an argument that tells it to preprocess only ('-E' I think in g++). You'll see what the expanded headers and macros look like with that option.

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