Re: Patch for isdigit/isalpha/etc. macro arguments

Andreas Schwab
2007-04-09T14:17:10Z

DJ Delorie <dj@redhat.com> writes:

>> The value of '\377' is implementation-defined.
>
> Not in the context of fgetc or <ctype.h> (the places where ambiguity

The context does not matter. The value of an expression is independent of
its context.

> In the case of casts from char* strings, the programmer should:
>
> isalpha((int)(unsigned char)(*s))

That's my very point.

> The cast to int may be optional.

It is.

Andreas.

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Andreas Schwab, SuSE Labs, schwab@suse.de
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