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/ C/C++ Users Group Library 1996 July / C-C++ Users Group Library July 1996.iso / vol_200 / 232_01 / object.st < prev    next >
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Text File  |  1987-06-15  |  1.8 KB  |  87 lines
  1. Class Object
  2. [
  3.      == anObject
  4.         ^ <Equality self anObject >
  5. |
  6.        ~~ x
  7.                 ^ (self == x) not
  8. |
  9.      = x
  10.         ^ (self == x)
  11. |
  12.      ~= x
  13.         ^ (self = x) not
  14. |
  15.      asString
  16.         ^ self class printString
  17. |
  18.         asSymbol
  19.                 ^ self asString asSymbol
  20. |
  21.     class
  22.         ^ <Class self >
  23. |
  24.         copy
  25.                 ^ self shallowCopy
  26. |
  27.         deepCopy        | size newobj |
  28.         size <- <Size self>.
  29.         (size < 0)
  30.             ifTrue: [^ self] "if special just copy object"
  31.             ifFalse: [ newobj <- self class new.
  32.             (1 to: size) do: [:i |
  33.                 <AtPut newobj i
  34.                     ( <At self i > copy ) > ].
  35.                 ^ newobj ]
  36. |
  37.      do: aBlock            | item |
  38.         item <- self first.
  39.         ^ [item notNil] whileTrue:
  40.             [aBlock value: item.  item <- self next]
  41. |
  42.     error: aString
  43.         <Error aString self>
  44. |
  45.         first
  46.                 ^ self
  47. |
  48.         isKindOf: aClass                | objectClass |
  49.                 objectClass <- self class.
  50.                 [objectClass notNil] whileTrue:
  51.                         [(objectClass == aClass) ifTrue: [^ true].
  52.                          objectClass <- objectClass superClass].
  53.                 ^ false
  54. |
  55.         isMemberOf: aClass
  56.                 ^ aClass == self class
  57.  
  58. |
  59.         isNil
  60.                 ^ false
  61. |
  62.         next
  63.                 ^ nil
  64. |
  65.         notNil
  66.                 ^ true
  67. |
  68.      print
  69.         <PrintWithReturn (self printString) >
  70. |
  71.      printString
  72.         ^ self asString
  73.  
  74. |       respondsTo: cmd
  75.                 ^ self class respondsTo: cmd
  76.  
  77. |       shallowCopy        | size newobj |
  78.         size <- <Size self>.
  79.         (size < 0)
  80.             ifTrue: [^ self] "if special just copy object"
  81.             ifFalse: [ newobj <- self class new.
  82.                 (1 to: size) do: [:i |
  83.                     <AtPut newobj i
  84.                         <At self i > > ].
  85.                     ^ newobj ]
  86. ]
  87.