On Tue, 10 Mar 2009, Kleyber wrote:
Hi,
> I have this line here:
> fwrite( n, @::oXml:ToString( HBXML_STYLE_INDENT+HBXML_STYLE_THREESPACES ) )
> But it gives this error:
> nfe.prg(341) Error E0030 Syntax error "syntax error at ')'"
> Where is wrong?
Your code.
You are trying to pass by reference sth what cannot be passed by
reference: result of method execution. Valid code should look like:
fwrite( n, ::oXml:ToString( HBXML_STYLE_INDENT+HBXML_STYLE_THREESPACES ) )
xHarbour has bug and does not generate compile time error or even runtime
error for code like:
f( @o:msg( <params,...> ) )
There are more similar situations in xHarbour, f.e.:
proc main()
local o, x
o:msg()--
++o:msg()
--o:msg(1,2,3)
o:msg(1,2,3)++
x := ( @main( 1,2,3,4,5 ) )
return
all of the above constructions should generate compile errors.
The 1-st to can be written as:
o:msg--
++o:msg
but the next three are technical nonsense so I cannot show you
alternative version.
Clipper also forbids compilation of code like:
o:msg()--
++o:msg()
Just try to compiler this code using Clipper.
Grammar rules in xHarbour needs serious cleanups.
In some places like above illegal constructions are accepted
without any errors and some PCODE is generated (sometimes
is reduced by compiler to different but valid code, sometimes
unnecessery, dummy or wrong instructions are put into the PCODE.
In some other placeses xHarbour does not accept some valid syntax:
x := @main()
cannot be compiled and it's necessary to add dummy braces:
x := ( @main() )
In some other compiler GPFs when you try to compile officially supported
code, f.e.:
o:&s++
If some xHarbour developers read it then maybe they report it to xHarbour
devel list.
best regards,
Przemek
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