2013-03-15 11:12 UTC+0100 Viktor Szakats (harbour syenar.net)
* /harbour/* -> /*
* moved whole Harbour source tree one level up to
avoid single 'harbour' top dir
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vszakats
206
website/samples/codebl.prg.html
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206
website/samples/codebl.prg.html
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<!DOCTYPE html>
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<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
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<head>
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<meta charset="utf-8">
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<script type="text/javascript" src="http://cdnjs.cloudflare.com/ajax/libs/xregexp/2.0.0/xregexp-min.js"></script>
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<script type="text/javascript" src="http://cdnjs.cloudflare.com/ajax/libs/xregexp/2.0.0/backcompat.js"></script>
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<script type="text/javascript" src="/js/shCore.js"></script>
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<script type="text/javascript" src="/js/shBrushHarbour.js"></script>
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<link href="/css/shCore.css" rel="stylesheet" type="text/css" />
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<link href="/css/shThemeDefault.css" rel="stylesheet" type="text/css" />
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<script type="text/javascript">SyntaxHighlighter.all()</script>
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</head>
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<body>
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<script type="syntaxhighlighter" class="brush: harbour; light: true"><![CDATA[
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STATIC s_cbStatic
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PROCEDURE Main()
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LOCAL a := TestBlocks()
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LOCAL cb
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? Eval( a[ 1 ] ) // 23
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? Eval( a[ 2 ], 42 ) // 42
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? Eval( a[ 1 ] ) // 42
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? Eval( a[ 2 ], 15 ) // 15
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myout( 15, Eval( a[ 1 ] ) ) // 15 15
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myout( 14, Eval( a[ 1 ] ) ) // 14 15
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myout( 42, Eval( a[ 2 ], 42 ) ) // 42 42
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myout( 14, Eval( a[ 2 ], 42 ) ) // 14 42
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myout( 42, Eval( a[ 1 ] ) ) // 42 42
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myout( 14, Eval( a[ 1 ] ) ) // 14 42
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GetArray( @a )
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PrintArray( @a )
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? "Test for variables passed by reference in a codeblock"
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DetachWithRefer()
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? "Test for indirect detaching of local variables"
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DetachToStatic( 1 )
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myout( 2, Eval( s_cbStatic, 1 ) )
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myout( 3, Eval( s_cbStatic, 2 ) )
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cb := s_cbStatic
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DetachToStatic( 100 )
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myout( 200, Eval( s_cbStatic, 100 ) )
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myout( 300, Eval( s_cbStatic, 200 ) )
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myout( 4, Eval( cb, 3 ) )
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ReferParam()
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RETURN
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STATIC FUNCTION TestBlocks()
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LOCAL nFoo := 23
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RETURN { {|| nFoo }, {| n | nFoo := n } }
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STATIC FUNCTION myout( nExpected, nGot )
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? nExpected, nGot
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RETURN NIL
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//
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STATIC PROCEDURE GetArray( a )
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LOCAL i
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a := Array( 100 )
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FOR i := 1 TO 100
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IF ( i % 6 ) == 0
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a[ i - 2 ] := NIL
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a[ i - 4 ] := NIL
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ENDIF
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a[ i ] := TestBlocks()
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NEXT
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RETURN
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STATIC PROCEDURE PrintArray( a )
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LOCAL i
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FOR i := 1 TO 100
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IF a[ i ] != NIL
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Eval( a[ i ][ 2 ], i )
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myout( i, Eval( a[ i ][ 1 ] ) )
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ENDIF
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NEXT
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RETURN
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//
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STATIC FUNCTION DetachWithRefer()
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LOCAL nTest
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LOCAL bBlock1 := MakeBlock()
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LOCAL bBlock2 := {|| DoThing( @nTest ), QOut( nTest ) }
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Eval( bBlock1 )
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Eval( bBlock2 )
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RETURN NIL
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STATIC FUNCTION MakeBlock()
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LOCAL nTest
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RETURN {|| DoThing( @nTest ), QOut( nTest ) }
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STATIC FUNCTION DoThing( n )
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n := 42
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RETURN NIL
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//
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STATIC FUNCTION DetachToStatic( n )
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s_cbStatic := {| x | n + x }
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RETURN NIL
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//
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STATIC FUNCTION ReferParam()
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LOCAL bResult
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? "Test for codeblock parameter passed by reference"
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PassByValue( {| lEnd | ;
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bResult := GetBlock( @lEnd ), ;
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SetByRef( @lEnd ) } )
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// Clipper & xHarbour it's .T.
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// In Harbour it is .F.
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? "Printed value in Clipper .T. =", Eval( bResult )
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?
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// Notice the Clipper bug: GetBlock is receiving the reference to
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// the codeblock parameter than the value of Eval( bResult ) shouldn't
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// depend on the order of block creation/value changing (GetBlock/SetRef).
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PassByRef( {| lEnd | ;
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bResult := GetBlock( @lEnd ), ;
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SetByRef( @lEnd ) } )
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// Clipper & xHarbour it's .T.
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// In Harbour it is .F.
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? "Printed value in Clipper .T. =", Eval( bResult )
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?
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? "2nd test for codeblock parameter passed by reference"
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PassByValue( {| lEnd | ;
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SetByRef( @lEnd ), ;
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bResult := GetBlock( @lEnd ) } )
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// Clipper & Harbour it's .F.
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? "Printed value in Clipper .F. =", Eval( bResult )
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?
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PassByRef( {| lEnd | ;
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SetByRef( @lEnd ), ;
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bResult := GetBlock( @lEnd ) } )
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// Clipper & Harbour it's .F.
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? "Printed value in Clipper .F. =", Eval( bResult )
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?
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RETURN NIL
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STATIC FUNCTION PassByValue( bBlock )
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LOCAL lSomeVar := .T.
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Eval( bBlock, lSomeVar )
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? "lSomeVar value in Clipper .T. =", lSomeVar
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RETURN .T.
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STATIC FUNCTION PassByRef( bBlock )
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LOCAL lSomeVar := .T.
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Eval( bBlock, @lSomeVar )
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? "lSomeVar value in Clipper .F. =", lSomeVar
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RETURN .T.
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STATIC FUNCTION SetByRef( lVar )
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lVar := .F.
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RETURN NIL
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STATIC FUNCTION GetBlock( lVar )
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RETURN {|| lVar }
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]]></script>
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</body>
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</html>
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