Re: [Axiom-developer] Internal Error : Interpreter code generation failed for expression...

[Michael Becker]

Am Dienstag, 21. Juli 2009 07:47 schrieb Ralf Hemmecke:
> Your "error" is in this line.
>
>  > fallingPower (p,n) == p*fallingPower(p-1,n-1)
>
> Axiom has no chance to figure out at compile time that n-1 is really of
> type NNI as you required in your signature
>
>  > fallingPower : (INT,NNI) -> INT
>
> So the best way to deal with that is to help Axiom.


     
     Ok,

        but can you explain, why  Axiom can  compile test2 ?

        the only difference is line       
                      n(i,j) := fallingPower(i+j,j)  in test0
        and
                      n(i,j) := fallingPower(i,j)  in test2 


     Thanks,  

        Michael                

>
> The following line works for me in FriCAS.
>
> fallingPower (p,n) == p*fallingPower(p-1,(n-1)::NNI)
>
> Maybe you have to add "::NNI" in a few other places.
>
> Hope that helps
> Ralf
>
> On 07/21/2009 05:44 AM, Michael Becker wrote:
> >     Hi,
> >
> >          I have  the followin input-file
> >
> >
> > ------- ma2.input -----------------------------------
> > fallingPower : (INT,NNI) -> INT
> >
> > fallingPower (p,0) == 1
> > fallingPower (p,n) == p*fallingPower(p-1,n-1)
> >
> > test0 () ==
> >    n : Matrix Integer
> >    n := new(3,3,0)
> >    for i in 1..3 repeat _
> >          for j in 1..3 repeat _
> >          n(i,j) := fallingPower(i+j,j)
> >    n
> >
> > test1 () ==
> >    n : Matrix Integer
> >    n := new(3,3,0)
> >    for i in 1..3 repeat _
> >          for j in 1..3 repeat _
> >          n(i,j) := i+j
> >    n
> >
> > test2 () ==
> >    n : Matrix Integer
> >    n := new(3,3,0)
> >    for i in 1..3 repeat _
> >          for j in 1..3 repeat _
> >          n(i,j) := fallingPower(i,j)
> >    n
> >
> >
> > test2()
> > test1()
> > test0()
> > --------------------------------------------------
> >
> >
> >  reading this in axiom gives the follwing error
> >
> >
> > --------------------------------------------------
> >
> >                        AXIOM Computer Algebra System
> >                           Version: Axiom (May 2009)
> >                 Timestamp: Sunday June 21, 2009 at 23:34:35
> > -------------------------------------------------------------------------
> >---- Issue )copyright to view copyright notices.
> >    Issue )summary for a summary of useful system commands.
> >    Issue )quit to leave AXIOM and return to shell.
> > -------------------------------------------------------------------------
> >----
> >
> >    Re-reading compress.daase   Re-reading interp.daase
> >    Re-reading operation.daase
> >    Re-reading category.daase
> >    Re-reading browse.daase
> > (1) ->
> > (1) -> )re ma2
> > (1) ->
> >
> >
> > fallingPower : (INT,NNI) -> INT
> >
> >                                                                    Type:
> > Void
> >
> > fallingPower (p,0) == 1
> >
> >                                                                    Type:
> > Void fallingPower (p,n) == p*fallingPower(p-1,n-1)
> >
> >                                                                    Type:
> > Void
> >
> > test0 () ==
> >    n : Matrix Integer
> >    n := new(3,3,0)
> >    for i in 1..3 repeat _
> >          for j in 1..3 repeat _
> >          n(i,j) := fallingPower(i+j,j)
> >    n
> >
> >                                                                    Type:
> > Void
> >
> > test1 () ==
> >    n : Matrix Integer
> >    n := new(3,3,0)
> >    for i in 1..3 repeat _
> >          for j in 1..3 repeat _
> >          n(i,j) := i+j
> >    n
> >
> >                                                                    Type:
> > Void
> >
> > test2 () ==
> >    n : Matrix Integer
> >    n := new(3,3,0)
> >    for i in 1..3 repeat _
> >          for j in 1..3 repeat _
> >          n(i,j) := fallingPower(i,j)
> >    n
> >
> >                                                                    Type:
> > Void
> >
> >
> > test2()
> >
> >    Loading /usr_local/axiom0509/mnt/opensuse/algebra/MATRIX.o for
> >       domain Matrix
> >    Loading /usr_local/axiom0509/mnt/opensuse/algebra/IIARRAY2.o for
> >       domain InnerIndexedTwoDimensionalArray
> >    There are no library operations named fallingPower
> >       Use HyperDoc Browse or issue
> >                             )what op fallingPower
> >       to learn if there is any operation containing " fallingPower " in
> >       its name.
> >    Cannot find a definition or applicable library operation named
> >       fallingPower with argument type(s)
> >                                    Integer
> >                                    Integer
> >
> >       Perhaps you should use "@" to indicate the required return type,
> >       or "$" to specify which version of the function you need.
> >    AXIOM will attempt to step through and interpret the code.
> >    Compiling function fallingPower with type (Integer,
> >       NonNegativeInteger) -> Integer
> >    Compiling function test2 with type () -> Matrix Integer
> >    Compiling function G1997 with type Integer -> Boolean
> >
> >    Loading /usr_local/axiom0509/mnt/opensuse/algebra/MATCAT-.o for
> >       domain MatrixCategory&
> >    Loading /usr_local/axiom0509/mnt/opensuse/algebra/ARR2CAT-.o for
> >       domain TwoDimensionalArrayCategory&
> >         +1  0  0+
> >
> >    (7)  |2  2  0|
> >
> >         +3  6  6+
> >                                                          Type: Matrix
> > Integer test1()
> >
> >    Compiling function test1 with type () -> Matrix Integer
> >
> >         +2  3  4+
> >
> >    (8)  |3  4  5|
> >
> >         +4  5  6+
> >                                                          Type: Matrix
> > Integer test0()
> >
> >    Compiling function test0 with type () -> Matrix Integer
> >    Loading /usr_local/axiom0509/mnt/opensuse/algebra/UPMP.o for package
> >       UnivariatePolynomialMultiplicationPackage
> >    Loading /usr_local/axiom0509/mnt/opensuse/algebra/UP.o for domain
> >       UnivariatePolynomial
> >    Internal Error
> >    Interpreter code generation failed for expression
> >       (IF (= |#2| 0) 1 (* |#1| (|fallingPower| (- |#1| 1) (- |#2| 1))))
> >
> >
> >
> > --------------------------------------------------
> >
> >
> >
> >    i can't see whats wrong with 'test0'.
> >
> >
> >     -- Michael
> >
> >
> >
> >   ps:  same result in fricas or open-axiom.





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