Unknown preprocessor directives

[Mark Mitchell]

I typed `#iF' in some code (instead of `#if').  I was confused when I
saw this message:

  foo.c:9190: unbalanced `#endif'

It would have been easier for me if this had said "Hey, numbskull,
watch your typing; there's no such thing as `#iF'."  Is it reasonable
to have the preprocessor issue a warning in this case?

--
Mark Mitchell                   mark@codesourcery.com
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