[fpc-devel] Case of string

[Bart]

Hi,

Case of string evaluation seems to have changed from 3.0.4 to trunk.

program Project1;
{$mode objfpc}
{$h+}

var
  s: string;
begin
  repeat
    readln(s);
    case s of
      'Hello', 'Hello2': writeln('In Hello');
      'a'..'z': writeln('In ''a''..''z''');
      else
        writeln('In else');
    end;
  until (s = '');
end.

With 3.0.4 when the inout is 'qwerty' the output is 'In 'a'..'z'.

In trunk (r37889) the output will be:
'In Hello' for 'Hello' and 'Hello2'
'In 'a'..'z' only when the inout is 'a'
'In else' for every other input.

The 3.0.4 behaviour makes sense to me:( 'qwerty' > 'a') evaluates to
TRUE, as does ('qwerty' < 'z').
This might be unexpected to the programmer, but to me this indicates
using ranges with case of string is a bit dangerous.

The trunk behaviour makes no sense to me at all.

Is this a bug, or was it changed by design?
If the latter, why?

Bart