wxString concatenation operator weirdness

[dot-borg]

Hi,

I'm having an issue with the wxString << operator, but only in wxMSW (unicode). The following code produces the string "35":

Code: Select all

wxString text;
int value = 35;
text << wxString::Format(_T("%d"), value);

However, this produces "%":

Code: Select all

wxString text;
int value = 35;
text << value;

I've looked at the wxString code and it appears that the << operator is doing exactly what I'm doing in the first case. Could this have something to do with unicode? Did I build the library incorrectly (I used "mingw32-make.exe -f makefile.gcc USE_XRC=1 SHARED=0 MONOLITHIC=1 BUILD=debug UNICODE=1")?

[SteveDowd]

I'm not sure, but you're giving Format an INT while it's expecting a double. That might be the problem.

[dot-borg]

Where is it expecting a double?

[SteveDowd]

the %d tells format that it's looking for a double/float i believe. Try changing the int definition to a double and then give format a precision of 1(one).

also, you could check out this thread:
http://forums.wxwidgets.org/viewtopic.p ... +precision

is there a necessary reason to use the << operator and not the .(dot) operator?

[dot-borg]

the %d tells format that it's looking for a double/float i believe. Try changing the int definition to a double and then give format a precision of 1(one).

also, you could check out this thread:
http://forums.wxwidgets.org/viewtopic.p ... +precision

The "%d" format specifier is for signed decimal integer and has been since the dawn of the standard C library.

[edit] Also, the first example I gave is the one that works.

is there a necessary reason to use the << operator and not the .(dot) operator?

There's no reason (other than convenience) to use the << operator over the Format static member function. It just makes me think something was not built correctly which calls into question other areas of the framework which may experience similar issues.

[SteveDowd]

my mistake, i was thinking that they had a different format character for each individual type.