Re: Colliding identifiers in MP.W

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Am 10.05.24 um 17:12 schrieb Andreas Scherer:
> CWEB source file MP.W _exports_ 'enum mp_color_model' to MPLIB.H in 
> section [205], but _uses_ macro '@d mp_color_model' from section [462] 
> internally. [Section numbers corrected for MetaPost 3.0a.]
While C doesn't have a problem with this situation (the functional macro 
never overwrites the enum type), CWEB can't cope with the two competing 
identifiers. The 'enum mp_color_model' always is typeset in bold and its 
'ilk' can not be reset, so the macro '#define mp_color_model(A)...' also 
is typeset in bold instead of in italics.

By applying a CWEB coding trick (aka 'kludge'), we can hide the 'enum' 
from the CWEAVE parser, so the secondary 'macro' gets treated correctly. 
With some additional CWEB formatting and an extra index entry, the two 
separate items appear side by side in the index. Only the macro is used 
in multiple sections, the 'enum' is never used per se.

Attached is a small patch that I apply in the larger 'mp.ch' in 
https://github.com/ascherer/mplibdir and later in the 'knuth-pdf' package.

Case closed,
Andreas
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