[PATCH] shrink last_char_is function even more

[Bernd Petrovitsch]

On 20/07/2020 05:46, Lauri Kasanen wrote:
> On Sun, 19 Jul 2020 22:31:09 +0200
> Tito <farmatito at tiscali.it> wrote:
> 
>> please don't do this, this will bite us further up the road,
>> similarly as all string functions that save a check and break
>> havoc afterwards.
> 
> The param should be marked with the nonnull attribute, just like the
> libc string functions. Then the compiler will warn you if you try to
> pass NULL (may need higher optimization, warning levels, or the
> analyzer mode in complex cases).

And it wants an assert()/assert()-like statement at the 1st line
of the function so that one can actually check the nonnull-ness
in test/debug/regression-test/... situations.

MfG,
	Bernd
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