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GLOBAL
DECLARE Destroyed : INTEGER
DECLARE Copies : INTEGER
ENDGLOBAL
CLASS Box
Text : STRING
OVERLOAD PROCEDURE NEW()
ENDPROCEDURE
OVERLOAD PROCEDURE NEW(BYREF Other : Box)
Text <- Other.Text
Copies <- Copies + 1
ENDPROCEDURE
PROCEDURE DELETE()
Destroyed <- Destroyed + 1
ENDPROCEDURE
ENDCLASS
PROCEDURE Check()
DECLARE A : Box
DECLARE B : Box
A.Text <- "left"
B.Text <- "right"
B <- A
B <- B
B.Text <- "changed"
OUTPUT A.Text, ":", B.Text, ":", Destroyed, ":", Copies
ENDPROCEDURE
CALL Check()
OUTPUT Destroyed, ":", Copies
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