Hey Nic Cheque it: http://developer.apple.com/DOCUMENTATION/Cocoa/Conceptual/ObjCRuntimeGuide/Articles/chapter_7_section_1.html#//apple_ref/doc/uid/TP40008048-CH100-SW1
:lachie http://smartbomb.com.au http://www.flickr.com/photos/lachie/ On Fri, Jan 2, 2009 at 1:04 PM, Dr Nic Williams <[email protected]> wrote: > Ah, thanks. > > I've looked thought the src now, and it seems _C_ID and _C_BOOL might > correspond to "@" and "B" but I can't find where they are defined; not > in macruby src nor in Cocoa Dev Documentation. > > Where is the list of available Pointer types + their character code? > > Cheers > Nic > > On Fri, Jan 2, 2009 at 10:15 AM, Vincent Isambart > <[email protected]> wrote: >>> The following doesn't work: >>> >>> framework 'Cocoa' >>> p1 = Pointer.new_with_type('@') >>> p1.assign(false) >>> p1[0] == false # => false, but should be true >>> >>> Then I figured I should be able to pass BOOL to -new_with_type as it >>> is the data type, but BOOL isn't recognised. >> >> The type for bool is upper case B. If you replace @ with B in your >> example it works fine. >> >> Just a little warning about pointers: they tend to forget their type >> if you read the value returned by a function twice. Do not try to read >> more than once their value (just store the value returned by #[] in a >> Ruby variable). However, reusing the same pointer in multiple calls >> seems to work fine. >> For example the following code: >> # rects was retuned by NSLayoutManager#rectArrayForCharacterRange >> puts rects[0] >> puts rects[0] >> >> Displays: >> #<NSRect origin=#<NSPoint x=5.0 y=0.0> size=#<NSSize width=0.0 height=19.0>> >> xxxxx.rb:222:in `[]': unrecognized octype `?_?' (RuntimeError) >> _______________________________________________ >> MacRuby-devel mailing list >> [email protected] >> http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel >> > > > > -- > Dr Nic Williams > iPhone and Rails consultants - http://mocra.com > Fun with iPhone/Ruby/Rails/Javascript - http://drnicwilliams.com > * Surf Report for iPhone - http://mocra.com/projects/surfreport/ * > _______________________________________________ > MacRuby-devel mailing list > [email protected] > http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel > _______________________________________________ MacRuby-devel mailing list [email protected] http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel
