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Dir : ~/usr/share/ri/3.0.0/system/Kernel/

View File Name : catch-i.ri

U:RDoc::AnyMethod[iI"
catch:ETI"Kernel#catch;TF:publico:RDoc::Markup::Document:@parts[o:RDoc::Markup::Paragraph;	[I"N+catch+ executes its block. If +throw+ is not called, the block executes ;TI"Nnormally, and +catch+ returns the value of the last expression evaluated.;To:RDoc::Markup::BlankLine�o:RDoc::Markup::Verbatim;	[I"*catch(1) { 123 }            # => 123
;T:@format0o;
;	[	I"PIf <code>throw(tag2, val)</code> is called, Ruby searches up its stack for ;TI"Qa +catch+ block whose +tag+ has the same +object_id+ as _tag2_. When found, ;TI"Qthe block stops executing and returns _val_ (or +nil+ if no second argument ;TI"was given to +throw+).;T@o;;	[I"*catch(1) { throw(1, 456) }  # => 456
;TI"*catch(1) { throw(1) }       # => nil
;T;
0o;
;	[I"JWhen +tag+ is passed as the first argument, +catch+ yields it as the ;TI"parameter of the block.;T@o;;	[I"(catch(1) {|x| x + 2 }       # => 3
;T;
0o;
;	[I"IWhen no +tag+ is given, +catch+ yields a new unique object (as from ;TI"O+Object.new+) as the block parameter. This object can then be used as the ;TI"Cargument to +throw+, and will match the correct +catch+ block.;T@o;;	[I"catch do |obj_A|
;TI"  catch do |obj_B|
;TI"    throw(obj_B, 123)
;TI")    puts "This puts is not reached"
;TI"  end
;TI"
;TI"%  puts "This puts is displayed"
;TI"  456
;TI"	end
;TI"
;TI"# => 456
;TI"
;TI"catch do |obj_A|
;TI"  catch do |obj_B|
;TI"    throw(obj_A, 123)
;TI"/    puts "This puts is still not reached"
;TI"  end
;TI"
;TI"0  puts "Now this puts is also not reached"
;TI"  456
;TI"	end
;TI"
;TI"
# => 123;T;
0:
@fileI"vm_eval.c;T:0@omit_headings_from_table_of_contents_below0I")catch([tag]) {|tag| block }  -> obj
;T0[�I"(*args);T@BFI"Kernel;TcRDoc::NormalModule00