Hello Brent,

the argument that follows the keyword evaluate: should not be a stream,
but a string.  Write 

result _ Compiler new evaluate: exprStream contents
            in: nil to: nil notifying: nil
            ifFail: failBlock. 

or simpler:

result _ Compiler new evaluate: ' 1 + 2 '
            in: nil to: nil notifying: nil
            ifFail: failBlock. 


to get the expected result.




Cheers,
Boris Gärtner

msg  systems ag
Fraunhoferstraße 9
85737 Ismaning

Tel.: (+89) 96 101 546
mailto: Boris_Gaertner at msg.de




"Brent Vukmer" <bvukmer at blackboard.com>
Gesendet von: squeak-dev-admin at lists.squeakfoundation.org
27.12.2001 16:26
Bitte antworten an squeak-dev

 
        An:     <squeak-dev at lists.squeakfoundation.org>
        Kopie: 
        Thema:  the magic behind "do it"


Selecting "2 halt" and inspecting brought me to the method 
Compiler#evalute:in:to:notifying:ifFail.  I wrote a script to
access this method directly ( see below ).  I am getting nil instead of 3. 
 When I debugged, it looks like the Parser is generating the following 
MethodNode: 
DoIt
                 ^ nil

What do I need to do to get Compiler-love?


| exprStream result failBlock |

exprStream  _ ReadWriteStream on: ''.
exprStream nextPutAll: '1 + 2'.
failBlock _ [ Transcript show: 'ArithmeticExpression#eval FAILED: ', 
exprStream contents. ].
result _ Compiler new evaluate: exprStream in: nil to: nil notifying: nil 
ifFail: failBlock.
^ result




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