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Re: Unnecessary(?) declaration of flex
From: |
John P. Hartmann |
Subject: |
Re: Unnecessary(?) declaration of flex |
Date: |
Sat, 14 Aug 2010 17:17:07 +0200 |
Yes, I think that may be it. flex used to try to support both the K&R
and ANSI style of argument declaration.
It really serves no purpose now. Why not remove it? Then I can
forget what I must do to shut up gcc.
Cheers,
j.
On 14 August 2010 15:50, Hans Aberg <address@hidden> wrote:
> On 14 Aug 2010, at 10:56, John P. Hartmann wrote:
>
>> What is the purpose of this declaration in the generated C file:
>>
>> extern int yylex (void);
>>
>> I can see that I can define a macro to turn it off, but it seems to
>> serve no purpose as the function is defined anyhow about fifteen lines
>> below. I suppose a purist might even object to "extern".
>
> It might be a remnant from the past(?), without proper header files. Then
> two style was to include the lexer .c file, or not do it, and the latter
> case the declaration of yylex() would be needed.
>
>