Are there any alternate preprocessors for C that provide more
powerful macros?  In particular, I'd like to find something
that supports both the original C preprocessor features, AND
the sort of macro features that are common in most assemblers
(looping, conditionals within the macro, etc.)

The immediate desire is for something that will let me produce
different code depending on whether an argument is a constant
or a symbol, but I've often wished for assembler-like macro
processing for other purposes.

Don't suggest m4.

Thanks
Bill W

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