On Tue, Dec 8, 2009 at 03:49, David Emerson <dle...@angelbase.com> wrote:
> Of course, if you have a set of all the valid characters
> ['-', '.', '0'..'9', 'e', 'E', '+'], it's not unreasonable to restrict
> characters outside that set. But make sure the set is complete-- at
> first I overlooked "e+" which is valid for val (string, real)
>
No, it is not:
t.pas
---
var
x: Double;
d: Integer;
begin
Val('e+', x, d);
Writeln(x, ' ', d);
end.
---
dcc32 -cc t.pas
t.exe
==>
0.00000000000000E+0000 3
---
fpc t.pas
t.exe
==>
0.00000000000000E+000 1
So both Delphi and FPC reject 'e+' as a floating-point value,
although with different error positions.
The latter is probably a compatibility bug in FPC's Val procedure.
--
Alexander S. Klenin
--
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