Newsgroups: comp.os.msdos.djgpp
From: "Mike Ruskai" <thanny AT spambegone DOT home DOT com>
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Subject: Re: construction has been delayed due to somebody's stupidity (most likely my own)
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Date: Sun, 25 Oct 1998 22:25:36 GMT
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NNTP-Posting-Date: Sun, 25 Oct 1998 14:25:36 PDT
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

On Sat, 24 Oct 1998 20:55:29 -0600, bowman wrote:

>
>
>Mike Ruskai wrote:
>> 
>> >int main(void)
>> >{
>> >       MyClass instance();  // point of interest
>> >       instance.say_hi();
>> >}
>> This is bad because you're declaring a function instead of defining a
>> variable.
>
>sigh. yes, one too many cut and pastes. Make that three ways not to do
>it.
>It is interesting that one can declare a function returning MyClass,
>never define or
>use it, and the compiler never says a word, while it will emit warnings
>for used 
>variables.

That would be annoying in the extreme.  Do you really want to see a warning
for every header file that declares but not defines functions (e.g. the
entire C library)?  Compilers can remove unreferenced functions, and if you
do refer to it, the linker will complain about an unresolved external.

I never enable warnings about unused variables, personally.


--
 - Mike

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