"{ Encoding: utf8 }"

"

 COPYRIGHT (c) 2006 by eXept Software AG

	      All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

"{ Package: 'stx:libcomp' }"

"{ NameSpace: Smalltalk }"

ByteCodeCompiler subclass:#ByteCodeCompilerWithBreakpointSupport

	instanceVariableNames:'breakpoints'

	classVariableNames:''

	poolDictionaries:''

	category:'System-Compiler-Debugging'

!

!ByteCodeCompilerWithBreakpointSupport class methodsFor:'documentation'!

copyright

"

 COPYRIGHT (c) 2006 by eXept Software AG

	      All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

!

documentation

"

    I'm an experimental compiler class that supports

    breakpoints. Once tested, the code will be merged

    to ByteCodeCompiler.

    [author:]

        Jan Vrany <jan.vrany@fit.cvut.cz>

    [instance variables:]

    [class variables:]

    [see also:]

"

! !

!ByteCodeCompilerWithBreakpointSupport methodsFor:'adding breakpoint'!

possiblyWrapABreakPointAround:aBlock

    "refactored Jan's original code; changed to not wrap an already wrapped expression"

    | expr bpIdx bpnt tokenPositionBefore tokenLineNrBefore |

    tokenPositionBefore := tokenPosition ? source position.

    tokenLineNrBefore := tokenLineNr.

    "/ find the very first breakpoint, which is right after the

    "/ current line start, and remove it from the breakpoints collection,

    "/ incl. all before. This removes breakpoints on empty lines or inside strings etc.

    "/ does not work

"/    bpIdx := breakpoints findFirst:[:b | b line >= tokenLineNrBefore].

"/    bpIdx > 0 ifTrue:[

"/        bpnt := breakpoints at:bpIdx.

"/        breakpoints removeIndex:bpIdx

"/    ] ifFalse:[

        [

            breakpoints notEmpty

            and:[(breakpoints first position ? 0) <= tokenPositionBefore]

        ] whileTrue:[

            bpnt := breakpoints removeFirst

        ].

"/    ].

    "/    Transcript showCR:tokenLineNrBefore.

    "/    Transcript showCR:thisContext sender.

    "/    Transcript showCR:bpnt.

    "/    Transcript showCR:'-----------'.

    expr := aBlock value.

    expr == #Error ifTrue:[^expr].

    bpnt isNil ifTrue:[^expr].

    bpnt isReached:true.

    expr isBreakPointNode ifTrue:[

        expr lineNumber <= bpnt line ifTrue:[

            "/ Transcript showCR:'bp [%1] expr already breakpointed: %2 ' with:bpnt line with:expr.

            ^expr

        ].

    ].

    tokenPositionBefore = tokenPosition ifTrue:[

        "/ nothing scanned - happens with unaryExpression which does not find anything,

        "/ but returns due to a ')' or ']' token.

        "/ Transcript showCR:'nothing scanned'.

        ^expr

    ].

    "/ Transcript show:'adding breakpoint '; show:bpnt; show:' before: '; showCR:expr.

    ^ BreakpointNode new

        breakpoint: bpnt;

        expression: expr;

        lineNumber:(bpnt line ? tokenLineNrBefore);

        yourself

    "Created: / 05-07-2011 / 21:11:19 / cg"

    "Modified: / 25-07-2017 / 12:37:24 / stefan"

!

removeMissedBreakpointsBefore:aPosition

    [

        breakpoints notEmpty

        and:[breakpoints first position < aPosition]

    ] whileTrue:[

        breakpoints removeFirst

    ].

    "Created: / 05-07-2011 / 23:13:25 / cg"

! !

!ByteCodeCompilerWithBreakpointSupport methodsFor:'parsing-expressions'!

binaryExpression

    ^ self possiblyWrapABreakPointAround:[super binaryExpression]

    "Created: / 05-07-2011 / 23:08:43 / cg"

!

binaryExpressionFor:aReceiver

    ^ self possiblyWrapABreakPointAround:[super binaryExpressionFor:aReceiver]

    "Created: / 05-07-2011 / 21:10:53 / cg"

!

block

    |blockNode|

    self removeMissedBreakpointsBefore:source position.

    blockNode := super block.

    blockNode ~~ #Error ifTrue:[

        self removeMissedBreakpointsBefore:blockNode endPosition+2.

    ].

    ^ blockNode

    "Created: / 05-07-2011 / 22:56:19 / cg"

!

expression

    ^ self possiblyWrapABreakPointAround:[super expression]

    "Created: / 16-06-2011 / 14:58:11 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 05-07-2011 / 21:11:38 / cg"

!

primary

    ^ self possiblyWrapABreakPointAround:[super primary]

    "Created: / 16-06-2011 / 14:58:11 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 05-07-2011 / 21:11:38 / cg"

    "Created: / 05-07-2011 / 23:05:23 / cg"

!

unaryExpression

    ^ self possiblyWrapABreakPointAround:[super unaryExpression]

    "Created: / 05-07-2011 / 23:08:54 / cg"

!

unaryExpressionFor:aReceiver

    ^ self possiblyWrapABreakPointAround:[super unaryExpressionFor:aReceiver]

    "Created: / 05-07-2011 / 21:15:30 / cg"

! !

!ByteCodeCompilerWithBreakpointSupport methodsFor:'private'!

breakpoints:aCollection

    breakpoints := aCollection copy 

                        sort:[:a :b| 

                                (a position notNil and:[b position notNil]) ifTrue:[

                                    a position < b position

                                ] ifFalse:[

                                    a line < b line

                                ].

                             ].

    "Created: / 16-06-2011 / 14:35:02 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Created: / 05-07-2011 / 21:37:28 / cg"

    "Modified: / 20-02-2019 / 11:16:25 / Claus Gittinger"

!

methodClass

    ^ methodClass ? MethodWithBreakpoints

    "Created: / 22-07-2013 / 15:54:19 / cg"

!

notifying: anObject

    super notifying: anObject.

    anObject notNil ifTrue:[

        breakpoints isNil ifTrue:[

            self breakpoints:(anObject perform: #breakpoints ifNotUnderstood:#()).

        ]

    ]

    "Created: / 16-06-2011 / 14:35:02 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 05-07-2011 / 21:48:37 / cg"

! !

!ByteCodeCompilerWithBreakpointSupport class methodsFor:'documentation'!

version

    ^ '$Header$'

!

version_CVS

    ^ '$Header$'

!

version_SVN

    ^ '$ Id $'

! !