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Full Discussion: C- trying to code a 'spare array'; 'enum' fauled.
Top Forums Programming C- trying to code a 'spare array'; 'enum' fauled. Post 302697989 by Corona688 on Friday 7th of September 2012 05:24:54 PM
Old 09-07-2012
Quote:
Originally Posted by alex_5161
(It is not just #define that vaiporing on precompilation. )
Unfortunately I must disagree. For your purposes, they amount to #define's without the mess. They don't vanish in precompilation, but they do vanish in a later phase of compilation, values set and irreversible. Your program can't iterate through them, convert them to or from strings, or map one set of them to another unless you do it the hard way, building your own tables of values to look them up in. They're just labels for numbers.

In C++, enum's are a little more strict to prevent some of that weirdness. They didn't add anything that'd actually help you, though. They didn't add any syntax to iterate through them, convert them to or from strings, or map one set of them to another, just made it harder to set an enum to an invalid value. They prevented you from doing arithmetic on enums like myenum++ since that might possibly end up at an invalid enum. They prevented you from assigning an enum from an integer without a typecast in case that causes an invalid enum. And so forth. (No, it doesn't actually check if the enums are valid if you typecast. It just lets it through.) So C++ code at runtime is still as ignorant of their status as anything but numbers as C is.
Last edited by Corona688; 09-07-2012 at 06:40 PM..
This User Gave Thanks to Corona688 For This Post:
alex_5161
 

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gtk2::toolshell

Gtk2::ToolShell(3)					User Contributed Perl Documentation					Gtk2::ToolShell(3)

NAME

       Gtk2::ToolShell

HIERARCHY

	 Glib::Interface
	 +----Gtk2::ToolShell

METHODS

   iconsize = $shell->get_icon_size
   orientation = $shell->get_orientation
   $shell->rebuild_menu
   reliefstyle = $shell->get_relief_style
   toolbarstyle = $shell->get_style
ENUMS AND FLAGS

   enum Gtk2::IconSize
       o   'invalid' / 'GTK_ICON_SIZE_INVALID'

       o   'menu' / 'GTK_ICON_SIZE_MENU'

       o   'small-toolbar' / 'GTK_ICON_SIZE_SMALL_TOOLBAR'

       o   'large-toolbar' / 'GTK_ICON_SIZE_LARGE_TOOLBAR'

       o   'button' / 'GTK_ICON_SIZE_BUTTON'

       o   'dnd' / 'GTK_ICON_SIZE_DND'

       o   'dialog' / 'GTK_ICON_SIZE_DIALOG'

   enum Gtk2::Orientation
       o   'horizontal' / 'GTK_ORIENTATION_HORIZONTAL'

       o   'vertical' / 'GTK_ORIENTATION_VERTICAL'

   enum Gtk2::ReliefStyle
       o   'normal' / 'GTK_RELIEF_NORMAL'

       o   'half' / 'GTK_RELIEF_HALF'

       o   'none' / 'GTK_RELIEF_NONE'

   enum Gtk2::ToolbarStyle
       o   'icons' / 'GTK_TOOLBAR_ICONS'

       o   'text' / 'GTK_TOOLBAR_TEXT'

       o   'both' / 'GTK_TOOLBAR_BOTH'

       o   'both-horiz' / 'GTK_TOOLBAR_BOTH_HORIZ'

SEE ALSO

       Gtk2, Glib::Interface

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