"Before an Objective C class can be used, it must be imported; by default, a small set of common classes are imported automatically, but additional classes can be imported as needed."
"Every imported Objective C class has as corresponding class word in the " { $vocab-link "cocoa.classes" } " vocabulary. Class words push the class object in the stack, allowing class methods to be invoked."
"Messages can be sent to classes and instances using a pair of parsing words:"
{ $subsection POSTPONE:-> }
{ $subsection POSTPONE:SUPER-> }
"These parsing words are actually syntax sugar for a pair of ordinary words; they can be used instead of the parsing words if the selector name is dynamically computed:"
"The " { $vocab-link "cocoa" } " vocabulary implements a Factor-Cocoa bridge for Mac OS X (GNUstep is not supported)."
$nl
"The lowest layer uses the " { $link "alien" } " to define bindings for the various functions in Apple's Objective-C runtime. This is defined in the " { $vocab-link "cocoa.runtime" } " vocabulary."
$nl
"On top of this, a dynamic message send facility is built:"
{ $subsection "objc-calling" }
{ $subsection "objc-subclassing" }
"A utility library is built to faciliate the development of Cocoa applications in Factor:"
