On 2019-07-30 14:04, Sven Barth via fpc-devel wrote:
thaddy <thaddy@localhost> schrieb am Di., 30. Juli 2019, 10:04:
On 2019-07-30 01:43, J. Gareth Moreton wrote:
As someone on the issue pointed out... on page 2, section 3.1:
3.1 Error
I have added this to the bug report. Consider that here all possible
case labels are implemented, the compiler still throws a compile
time
error.
That means the implementation is wrong anyway.
{$mode ISO}
program isobug(infile,outfile);
type
operator = (plus, minus, times);
var
x:integer;
o:operator = plus;
begin
x:=1;
case o of
plus : x := x; // all
minus : x := x; // possible
times : x := x; // cases
end;
end.
The easy way out seems to revert to the 3.0.4 implementation given
the
section mentioned.
Gareth's suggestion would be nice to have, though.
That's definitely a bug, cause the same code (with "operator" changed
to "op") compiles in mode ObjFPC without any warning or error.
Regards,
Sven
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Yes, it is a bug, but note the case handling in mode objfpc (all modes
except macpas, iso and extended) differs.
It should only error out if the selector value has no case label.
Extended Pascal then throws a run-time error.
The other modes, like objfpc, silently continue.
It should not error out at all at compile time.
I provided a patch that makes the iso behavior equal to the extended
pascal behavior.
This solves both the above issue and the compile time vs run time error.
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