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Ingy döt Net 2013-04-10 23:57:08 -07:00
parent 47bf37c096
commit b83f433714
12433 changed files with 156208 additions and 123 deletions
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19
Task/Null-object/ALGOL-68/null-object.alg Normal file
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REF STRING no result = NIL;
STRING result := "";
IF no result :=: NIL THEN print(("no result :=: NIL", new line)) FI;
IF result :/=: NIL THEN print(("result :/=: NIL", new line)) FI;
IF no result IS NIL THEN print(("no result IS NIL", new line)) FI;
IF result ISNT NIL THEN print(("result ISNT NIL", new line)) FI;
COMMENT using the UNESCO/IFIP/WG2.1 ALGOL 68 character set
result := °;
IF REF STRING(result) :≠: ° THEN print(("result ≠ °", new line)) FI;
END COMMENT
# Note the following gotcha: #
REF STRING var := NIL;
IF var ISNT NIL THEN print(("The address of var ISNT NIL",new line)) FI;
IF var IS REF STRING(NIL) THEN print(("The address of var IS REF STRING(NIL)",new line)) FI