[fpc-devel] Compiler bug in macro handling?

[Michael Van Canneyt]

On Wed, 12 Apr 2017, Giuliano Colla wrote:

> Hi honourable fpc developers!
>
> I found a strange error (both with fpc 2.6.4 and fpc 3.0.0, in Linux 
> environment)
>
> The following snippet of code:
>
> {$MACRO ON}
> {$define Positiva:=False;}
> {$define Negativa:=True;}
> .......
>      if HDCOUNT0 >= COUNT0 then V_PIU0 := Positiva
>       else V_PIU0 := Negativa;
>
>  gives rise to a Fatal: syntax error: ";" expected but "ELSE" found.
>
> But if I change the code into:
>
>      if HDCOUNT0 >= COUNT0 then V_PIU0 := False
>       else V_PIU0 := True;
>
>  (which IMHO should be identical) it compiles without complaining.
>
> Am I doing something wrong or it is a bug?

Try removing the semicolon:
{$define Positiva:=False}
{$define Negativa:=True}

Michael.