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)abbrev domain ASP6 Asp6
++ Author: Mike Dewar and Godfrey Nolan and Grant Keady
++ Date Created: Mar 1993
++ Date Last Updated: 6 October 1994
++ References:
++ Hawk95 Two more links to NAG numerics involving CA systems
++ Kead93 Production of Argument SubPrograms in the AXIOM -- NAG link
++ Description:
++ \spadtype{Asp6} produces Fortran for Type 6 ASPs, needed for NAG routines
++ c05nbf, c05ncf. These represent vectors of functions of X(i) and look like:
++ 
++ \tab{5}SUBROUTINE FCN(N,X,FVEC,IFLAG)
++ \tab{5}DOUBLE PRECISION X(N),FVEC(N)
++ \tab{5}INTEGER N,IFLAG
++ \tab{5}FVEC(1)=(-2.0D0*X(2))+(-2.0D0*X(1)**2)+3.0D0*X(1)+1.0D0
++ \tab{5}FVEC(2)=(-2.0D0*X(3))+(-2.0D0*X(2)**2)+3.0D0*X(2)+(-1.0D0*X(1))+1.
++ \tab{4}&0D0
++ \tab{5}FVEC(3)=(-2.0D0*X(4))+(-2.0D0*X(3)**2)+3.0D0*X(3)+(-1.0D0*X(2))+1.
++ \tab{4}&0D0
++ \tab{5}FVEC(4)=(-2.0D0*X(5))+(-2.0D0*X(4)**2)+3.0D0*X(4)+(-1.0D0*X(3))+1.
++ \tab{4}&0D0
++ \tab{5}FVEC(5)=(-2.0D0*X(6))+(-2.0D0*X(5)**2)+3.0D0*X(5)+(-1.0D0*X(4))+1.
++ \tab{4}&0D0
++ \tab{5}FVEC(6)=(-2.0D0*X(7))+(-2.0D0*X(6)**2)+3.0D0*X(6)+(-1.0D0*X(5))+1.
++ \tab{4}&0D0
++ \tab{5}FVEC(7)=(-2.0D0*X(8))+(-2.0D0*X(7)**2)+3.0D0*X(7)+(-1.0D0*X(6))+1.
++ \tab{4}&0D0
++ \tab{5}FVEC(8)=(-2.0D0*X(9))+(-2.0D0*X(8)**2)+3.0D0*X(8)+(-1.0D0*X(7))+1.
++ \tab{4}&0D0
++ \tab{5}FVEC(9)=(-2.0D0*X(9)**2)+3.0D0*X(9)+(-1.0D0*X(8))+1.0D0
++ \tab{5}RETURN
++ \tab{5}END

Asp6(name) : SIG == CODE where
  name : Symbol

  FEXPR  ==> FortranExpression([],['X],MFLOAT)
  MFLOAT ==> MachineFloat
  FST    ==> FortranScalarType
  FT     ==> FortranType
  SYMTAB ==> SymbolTable
  RSFC   ==> Record(localSymbols:SymbolTable,code:List(FortranCode))
  UFST   ==> Union(fst:FST,void:"void")
  FRAC   ==> Fraction
  POLY   ==> Polynomial
  EXPR   ==> Expression
  INT    ==> Integer
  FLOAT  ==> Float
  VEC    ==> Vector
  VF2    ==> VectorFunctions2

  SIG ==> FortranVectorFunctionCategory with

    coerce: Vector FEXPR -> %
      ++coerce(f) takes objects from the appropriate instantiation of
      ++\spadtype{FortranExpression} and turns them into an ASP.

  CODE ==> add

    real : UFST := ["real"::FST]$UFST

    syms : SYMTAB := empty()$SYMTAB

    declare!(N,fortranInteger()$FT,syms)$SYMTAB

    xType : FT := construct(real,[N],false)$FT

    declare!(X,xType,syms)$SYMTAB

    declare!(FVEC,xType,syms)$SYMTAB

    declare!(IFLAG,fortranInteger()$FT,syms)$SYMTAB

    Rep := FortranProgram(name,["void"]$Union(fst:FST,void:"void"),
                          [N,X,FVEC,IFLAG],syms)

    retract(u:VEC FRAC POLY INT):$ ==
      v : VEC FEXPR := map(retract,u)$VF2(FRAC POLY INT,FEXPR)
      v::$

    retractIfCan(u:VEC FRAC POLY INT):Union($,"failed") ==
      v:Union(VEC FEXPR,"failed"):=map(retractIfCan,u)$VF2(FRAC POLY INT,FEXPR)
      v case "failed" => "failed"
      (v::VEC FEXPR)::$

    retract(u:VEC FRAC POLY FLOAT):$ ==
      v : VEC FEXPR := map(retract,u)$VectorFunctions2(FRAC POLY FLOAT,FEXPR)
      v::$

    retractIfCan(u:VEC FRAC POLY FLOAT):Union($,"failed") ==
      v:Union(VEC FEXPR,"failed"):=_
        map(retractIfCan,u)$VF2(FRAC POLY FLOAT,FEXPR)
      v case "failed" => "failed"
      (v::VEC FEXPR)::$

    retract(u:VEC EXPR INT):$ ==
      v : VEC FEXPR := map(retract,u)$VectorFunctions2(EXPR INT,FEXPR)
      v::$

    retractIfCan(u:VEC EXPR INT):Union($,"failed") ==
      v:Union(VEC FEXPR,"failed"):=map(retractIfCan,u)$VF2(EXPR INT,FEXPR)
      v case "failed" => "failed"
      (v::VEC FEXPR)::$

    retract(u:VEC EXPR FLOAT):$ ==
      v : VEC FEXPR := map(retract,u)$VectorFunctions2(EXPR FLOAT,FEXPR)
      v::$

    retractIfCan(u:VEC EXPR FLOAT):Union($,"failed") ==
      v:Union(VEC FEXPR,"failed"):=map(retractIfCan,u)$VF2(EXPR FLOAT,FEXPR)
      v case "failed" => "failed"
      (v::VEC FEXPR)::$

    retract(u:VEC POLY INT):$ ==
      v : VEC FEXPR := map(retract,u)$VectorFunctions2(POLY INT,FEXPR)
      v::$

    retractIfCan(u:VEC POLY INT):Union($,"failed") ==
      v:Union(VEC FEXPR,"failed"):=map(retractIfCan,u)$VF2(POLY INT,FEXPR)
      v case "failed" => "failed"
      (v::VEC FEXPR)::$

    retract(u:VEC POLY FLOAT):$ ==
      v : VEC FEXPR := map(retract,u)$VectorFunctions2(POLY FLOAT,FEXPR)
      v::$

    retractIfCan(u:VEC POLY FLOAT):Union($,"failed") ==
      v:Union(VEC FEXPR,"failed"):=map(retractIfCan,u)$VF2(POLY FLOAT,FEXPR)
      v case "failed" => "failed"
      (v::VEC FEXPR)::$

    fexpr2expr(u:FEXPR):EXPR MFLOAT ==
      (u::EXPR MFLOAT)$FEXPR

    coerce(u:VEC FEXPR):% ==
      v : VEC EXPR MFLOAT
      v := map(fexpr2expr,u)$VF2(FEXPR,EXPR MFLOAT)
      ([assign(FVEC,v)$FortranCode,returns()$FortranCode]$List(FortranCode))::$

    coerce(c:List FortranCode):% == coerce(c)$Rep

    coerce(r:RSFC):% == coerce(r)$Rep

    coerce(c:FortranCode):% == coerce(c)$Rep

    coerce(u:%):OutputForm == coerce(u)$Rep

    outputAsFortran(u):Void ==
      p := checkPrecision()$NAGLinkSupportPackage
      outputAsFortran(u)$Rep
      p => restorePrecision()$NAGLinkSupportPackage