60 lines
1.7 KiB
Plaintext
60 lines
1.7 KiB
Plaintext
//
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// Implementation of operator overload in Harbour
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//
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// Written by Eddie Runia <eddie@runia.com>
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//
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// Placed in the public domain
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//
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#include "hbclass.ch"
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PROCEDURE Main()
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LOCAL oString := TString():New( "Hello" )
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? "Testing TString with Operator Overloading"
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? oString:cValue
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? "---"
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? ValType( oString )
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? "Equal........:", oString = "Hello"
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? "Exactly Equal:", oString == "Hello"
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? "Not Equal != :", oString != "Hello"
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? "Not Equal <> :", oString <> "Hello"
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? "Not Equal # :", oString # "Hello"
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? "Substring $ :", oString $ "Hello"
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? "Less than :", oString < "Hello"
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? "Less than or Equal:", oString <= "Hello"
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? "Greater than :", oString > "Hello"
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? "Greater than or Equal:", oString >= "Hello"
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? "Concatenation + :", oString + "Hello"
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? "Concatenation - :", oString - "Hello"
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? "Array index[2] :", oString[ 2 ]
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? "Array index[3] := 'X' :", oString[ 3 ] := 'X'
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? oString:cValue
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RETURN
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CREATE CLASS TString
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VAR cValue
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METHOD New( cText ) INLINE ::cValue := cText, Self
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OPERATOR "=" ARG cArg INLINE ::cValue = cArg
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OPERATOR "==" ARG cArg INLINE ::cValue == cArg
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OPERATOR "!=" ARG cArg INLINE ::cValue != cArg
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OPERATOR "<" ARG cArg INLINE ::cValue < cArg
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OPERATOR "<=" ARG cArg INLINE ::cValue <= cArg
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OPERATOR ">" ARG cArg INLINE ::cValue > cArg
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OPERATOR ">=" ARG cArg INLINE ::cValue >= cArg
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OPERATOR "+" ARG cArg INLINE ::cValue + cArg
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OPERATOR "-" ARG cArg INLINE ::cValue - cArg
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OPERATOR "$" ARG cArg INLINE ::cValue $ cArg
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OPERATOR "[]" ARG nIndex INLINE iif( PCount() > 2, ;
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::cValue := Stuff( ::cValue, nIndex, 1, hb_PValue( 3 ) ), ;
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SubStr( ::cValue, nIndex, 1 ) )
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ENDCLASS
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