U:RDoc::NormalClass[iI"Continuation:ET@I"Object;To:RDoc::Markup::Document:@parts[o;;[o:RDoc::Markup::Paragraph;[I":Continuation objects are generated by Kernel#callcc, ;TI"<after having +require+d <i>continuation</i>. They hold ;TI"Ha return address and execution context, allowing a nonlocal return ;TI"Hto the end of the <code>callcc</code> block from anywhere within a ;TI"Cprogram. Continuations are somewhat analogous to a structured ;TI"Gversion of C's <code>setjmp/longjmp</code> (although they contain ;TI"?more state, so you might consider them closer to threads).;To:RDoc::Markup::BlankLineo;	;[I"For instance:;T@o:RDoc::Markup::Verbatim;[
I"require "continuation"
;TI":arr = [ "Freddie", "Herbie", "Ron", "Max", "Ringo" ]
;TI"callcc{|cc| $cc = cc}
;TI"puts(message = arr.shift)
;TI"&$cc.call unless message =~ /Max/
;T:@format0o;	;[I"<em>produces:</em>;T@o;;[	I"
Freddie
;TI"Herbie
;TI"	Ron
;TI"	Max
;T;0o;	;[I"/Also you can call callcc in other methods:;T@o;;[I"require "continuation"
;TI"
;TI"def g
;TI"<  arr = [ "Freddie", "Herbie", "Ron", "Max", "Ringo" ]
;TI"  cc = callcc { |cc| cc }
;TI"  puts arr.shift
;TI"  return cc, arr.size
;TI"	end
;TI"
;TI"def f
;TI"  c, size = g
;TI"  c.call(c) if size > 1
;TI"	end
;TI"
;TI"f
;T;0o;	;[I"HThis (somewhat contrived) example allows the inner loop to abandon ;TI"processing early:;T@o;;[I"require "continuation"
;TI"callcc {|cont|
;TI"  for i in 0..4
;TI"    print "\n#{i}: "
;TI"     for j in i*5...(i+1)*5
;TI""      cont.call() if j == 17
;TI"      printf "%3d", j
;TI"
    end
;TI"  end
;TI"}
;TI"
puts
;T;0o;	;[I"<em>produces:</em>;T@o;;[	I"0:   0  1  2  3  4
;TI"1:   5  6  7  8  9
;TI"2:  10 11 12 13 14
;TI"3:  15 16;T;0:
@fileI"cont.c;T:0@omit_headings_from_table_of_contents_below0;
0;0[[[[[I"
class;T[[:public[[:protected[[:private[[I"
instance;T[[;[[I"[];TI"cont.c;T[I"	call;T@m[;[[;[[[U:RDoc::Context::Section[i0o;;[;
0;0[@X@XcRDoc::TopLevel