(1) -> <spad>

)abbrev domain MYPLEX MyComplex
++ Description:
++ Based on \spadtype{Complex(R)},
++ \spadtype{MyComplex(R)} creates the domain of elements of the form
++ \spad{a + b * i} where \spad{a} and b come from the ring R,
++ and i is a new element such that \spad{i^2 = -1}.
MyComplex(R:CommutativeRing): ComplexCategory(R) with
     if R has OpenMath then OpenMath
   == add
       Rep := Record(real:R, imag:R)

       if R has OpenMath then
         writeOMComplex(dev: OpenMathDevice, x: %): Void ==
          OMputApp(dev)
          OMputSymbol(dev, "complex1", "complex__cartesian")
          OMwrite(dev, real x)
          OMwrite(dev, imag x)
          OMputEndApp(dev)

         OMwrite(x: %): String ==
          s: String := ""
          sp := OM_-STRINGTOSTRINGPTR(s)$Lisp
          dev: OpenMathDevice := OMopenString(sp pretend String, OMencodingXML)
          OMputObject(dev)
          writeOMComplex(dev, x)
          OMputEndObject(dev)
          OMclose(dev)
          s := OM_-STRINGPTRTOSTRING(sp)$Lisp pretend String
          s

         OMwrite(x: %, wholeObj: Boolean): String ==
          s: String := ""
          sp := OM_-STRINGTOSTRINGPTR(s)$Lisp
          dev: OpenMathDevice := OMopenString(sp pretend String, OMencodingXML)
          if wholeObj then
            OMputObject(dev)
          writeOMComplex(dev, x)
          if wholeObj then
            OMputEndObject(dev)
          OMclose(dev)
          s := OM_-STRINGPTRTOSTRING(sp)$Lisp pretend String
          s

         OMwrite(dev: OpenMathDevice, x: %): Void ==
          OMputObject(dev)
          writeOMComplex(dev, x)
          OMputEndObject(dev)

         OMwrite(dev: OpenMathDevice, x: %, wholeObj: Boolean): Void ==
          if wholeObj then
            OMputObject(dev)
          writeOMComplex(dev, x)
          if wholeObj then
            OMputEndObject(dev)

       0                == [0, 0]
       1                == [1, 0]
       zero? x          == zero?(x.real) and zero?(x.imag)
--       one? x           == one?(x.real) and zero?(x.imag)
       one? x           == ((x.real) = 1) and zero?(x.imag)
       coerce(r:R):%    == [r, 0]
       complex(r, i)   == [r, i]
       real x           == x.real
       imag x           == x.imag
       x + y            == [x.real + y.real, x.imag + y.imag]
                           -- by re-defining this here, we save 5 fn calls
       x:% * y:% ==
         [x.real * y.real - x.imag * y.imag,
          x.imag * y.real + y.imag * x.real] -- here we save nine!

       if R has IntegralDomain then
         _exquo(x:%, y:%) == -- to correct bad defaulting problem
           zero? y.imag => x exquo y.real
           x * conjugate(y) exquo norm(y)</spad>

Compiling FriCAS source code from file 
      /var/lib/zope2.10/instance/axiom-wiki/var/LatexWiki/4777213760436474437-25px001.spad
      using old system compiler.
   MYPLEX abbreviates domain MyComplex 
------------------------------------------------------------------------
   initializing NRLIB MYPLEX for MyComplex 
   compiling into NRLIB MYPLEX 
****** Domain: R already in scope
augmenting R: (OpenMath)
   compiling local writeOMComplex : (OpenMathDevice,%) -> Void
Time: 0.04 SEC.

   compiling exported OMwrite : % -> String
****** comp fails at level 2 with expression: ******
error in function OMwrite 

(SEQ (|:=| (|:| |s| (|String|)) "") | << |
     (|:=| |sp| ((|Sel| |Lisp| OM-STRINGTOSTRINGPTR) |s|)) | >> |
     (|:=| (|:| |dev| (|OpenMathDevice|))
      (|OMopenString| (|pretend| |sp| (|String|)) |OMencodingXML|))
     (|OMputObject| |dev|) (|writeOMComplex| |dev| |x|)
     (|OMputEndObject| |dev|) (|OMclose| |dev|)
     (|:=| |s|
      (|pretend| ((|Sel| |Lisp| OM-STRINGPTRTOSTRING) |sp|) (|String|)))
     (|exit| 1 |s|))
****** level 2  ******
$x:= (:= sp ((Sel Lisp OM-STRINGTOSTRINGPTR) s))
$m:= NoValueMode
$f:=
((((|s| # #) (|x| # #) (|writeOMComplex| #))
  ((|writeOMComplex| #) (|coerce| #) (|void| #) (|$DomainsInScope| # # #) ...)))

   >> Apparent user error:
   No mode in assignment to: 
   sp

myType := MyComplex MyComplex Integer

   MyComplex is an unknown constructor and so is unavailable. Did you 
      mean to use -> but type something different instead?