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										 |  |  | ! Copyright (C) 2011 Doug Coleman. | 
					
						
							|  |  |  | ! See http://factorcode.org/license.txt for BSD license. | 
					
						
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										 |  |  | USING: accessors classes classes.algebra classes.algebra.private | 
					
						
							|  |  |  | classes.maybe eval generic.single kernel math slots tools.test ;
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										 |  |  | IN: classes.maybe.tests | 
					
						
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										 |  |  | { t } [ 3 maybe{ integer } instance? ] unit-test | 
					
						
							|  |  |  | { t } [ f maybe{ integer } instance? ] unit-test | 
					
						
							|  |  |  | { f } [ 3.0 maybe{ integer } instance? ] unit-test | 
					
						
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										 |  |  | TUPLE: maybe-integer-container { something maybe{ integer } } ;
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										 |  |  | { f } [ maybe-integer-container new something>> ] unit-test | 
					
						
							|  |  |  | { 3 } [ maybe-integer-container new 3 >>something something>> ] unit-test | 
					
						
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										 |  |  | [ maybe-integer-container new 3.0 >>something ] [ bad-slot-value? ] must-fail-with | 
					
						
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										 |  |  | TUPLE: self-pointer { next maybe{ self-pointer } } ;
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										 |  |  | { T{ self-pointer { next T{ self-pointer } } } } | 
					
						
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										 |  |  | [ self-pointer new self-pointer new >>next ] unit-test | 
					
						
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										 |  |  | { t } [ f maybe{ POSTPONE: f } instance? ] unit-test | 
					
						
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										 |  |  | PREDICATE: natural < maybe{ integer } | 
					
						
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										 |  |  |     0 > ;
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										 |  |  | { f } [ -1 natural? ] unit-test | 
					
						
							|  |  |  | { f } [ 0 natural? ] unit-test | 
					
						
							|  |  |  | { t } [ 1 natural? ] unit-test | 
					
						
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										 |  |  | { t } [ f maybe{ maybe{ integer } } instance? ] unit-test | 
					
						
							|  |  |  | { t } [ 3 maybe{ maybe{ integer } } instance? ] unit-test | 
					
						
							|  |  |  | { f } [ 3.03 maybe{ maybe{ integer } } instance? ] unit-test | 
					
						
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										 |  |  | INTERSECTION: only-f maybe{ integer } POSTPONE: f ;
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										 |  |  | { t } [ f only-f instance? ] unit-test | 
					
						
							|  |  |  | { f } [ t only-f instance? ] unit-test | 
					
						
							|  |  |  | { f } [ 30 only-f instance? ] unit-test | 
					
						
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										 |  |  | UNION: ?integer-float maybe{ integer } maybe{ float } ;
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										 |  |  | { t } [ 30 ?integer-float instance? ] unit-test | 
					
						
							|  |  |  | { t } [ 30.0 ?integer-float instance? ] unit-test | 
					
						
							|  |  |  | { t } [ f ?integer-float instance? ] unit-test | 
					
						
							|  |  |  | { f } [ t ?integer-float instance? ] unit-test | 
					
						
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							|  |  |  | TUPLE: foo ;
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							|  |  |  | GENERIC: lol ( obj -- string )
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										 |  |  | M: maybe{ foo } lol drop "lol" ;
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										 |  |  | { "lol" } [ foo new lol ] unit-test | 
					
						
							|  |  |  | { "lol" } [ f lol ] unit-test | 
					
						
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										 |  |  | [ 3 lol ] [ no-method? ] must-fail-with | 
					
						
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							|  |  |  | TUPLE: foo2 a ;
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							|  |  |  | GENERIC: lol2 ( obj -- string )
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										 |  |  | M: maybe{ foo } lol2 drop "lol2" ;
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										 |  |  | M: f lol2 drop "lol22" ;
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										 |  |  | { "lol2" } [ foo new lol2 ] unit-test | 
					
						
							|  |  |  | { "lol22" } [ f lol2 ] unit-test | 
					
						
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										 |  |  | [ 3 lol2 ] [ no-method? ] must-fail-with | 
					
						
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										 |  |  | [ "IN: classes-tests maybe{ 1 2 3 }" eval( -- ) ] | 
					
						
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										 |  |  | [ error>> not-an-instance? ] must-fail-with |