 CodeGeneration - Maple Programming Help

Home : Support : Online Help : Programming : Input and Output : Translation : CodeGeneration/CSharp

CodeGeneration

 CSharp
 translate Maple code to C# code

 Calling Sequence CSharp(x, cgopts)

Parameters

 x - expression, list, rtable, procedure, or module cgopts - (optional) one or more CodeGeneration options

Description

 • The CSharp(x, cgopts) calling sequence translates Maple code to C# code.
 - If the parameter x is an algebraic expression, then a C# statement assigning the expression to a variable is generated.
 - If x is a list, Maple Array, or rtable of algebraic expressions, then a sequence of C# statements assigning the elements to a C# array is produced.  Only the initialized elements of the rtable or Maple Array are translated.
 - If x is a list of equations $\mathrm{nm}=\mathrm{expr}$ where $\mathrm{nm}$ is a name and $\mathrm{expr}$ is an algebraic expression, then this is understood to be a sequence of assignment statements.  In this case, the equivalent sequence of C# assignment statements is generated.
 - If x is a procedure, then a C# class is generated containing a function equivalent to the procedure, along with any necessary import statements.
 - If x is a module, then a C# class is generated, as described on the CSharpDetails help page.
 • The parameter cgopts may include one or more CodeGeneration options, as described in CodeGenerationOptions.

Examples

For a description of the options used in the following examples, see CodeGenerationOptions.

 > $\mathrm{with}\left(\mathrm{CodeGeneration}\right):$

Translate a simple expression and assign to the name $w$ in the target code.

 > $\mathrm{CSharp}\left(x+yz-2xz,\mathrm{resultname}="w"\right)$
 w = -2 * x * z + y * z + x;

Translate a list and assign to an array with name $w$ in the target code.

 > $\mathrm{CSharp}\left(\left[\left[x,2y\right],\left[5,z\right]\right],\mathrm{resultname}="w"\right)$
 w[0,0] = x; w[0,1] = 2 * y; w[1,0] = 5; w[1,1] = z;

Translate a computation sequence.  Optimize the input first.

 > $\mathrm{cs}≔\left[s=1.0+x,t=\mathrm{ln}\left(s\right)\mathrm{exp}\left(-x\right),r=\mathrm{exp}\left(-x\right)+xt\right]:$
 > $\mathrm{CSharp}\left(\mathrm{cs},\mathrm{optimize}\right)$
 s = 0.10e1 + x; t1 = Math.Log(s); t2 = Math.Exp(-x); t = t2 * t1; r = x * t + t2;

Declare that $x$ is a float and $y$ is an integer. Return the result in a string.

 > $s≔\mathrm{CSharp}\left(x+y+1,\mathrm{declare}=\left[x::\mathrm{float},y::'\mathrm{integer}'\right],\mathrm{output}=\mathrm{string}\right)$
 ${s}{≔}{"cg = x + \left(System.Double\right) y + 0.1e1;"}$ (1)

Translate a procedure.  Assume that all untyped variables have type integer.

 > f := proc(x, y, z) return x*y-y*z+x*z; end proc:
 > $\mathrm{CSharp}\left(f,\mathrm{defaulttype}=\mathrm{integer}\right)$
 public class CodeGenerationClass {   public static System.Int32 f (System.Int32 x, System.Int32 y, System.Int32 z)   {     return y * x - y * z + x * z;   } }

Translate a procedure containing an implicit return.  A new variable is created to hold the return value.

 > f := proc(n)   local x, i;   x := 0.0;   for i to n do     x := x + i;   end do; end proc:
 > $\mathrm{CSharp}\left(f\right)$
 public class CodeGenerationClass {   public static System.Double f (System.Int32 n)   {     System.Double x;     System.Int32 i;     System.Double cgret;     x = 0.0e0;     for (i = 1; i <= n; i++)     {       x = x + (System.Double) i;       cgret = x;     }     return cgret;   } }

Translate a procedure accepting an Array as a parameter.  Note that the indices are renumbered so that the CSharp array starts at index 0.

 > f := proc(x::Array(numeric, 5..7))   return x+x+x; end proc:
 > $\mathrm{CSharp}\left(f\right)$
 public class CodeGenerationClass {   public static System.Double f (System.Double[] x)   {     return x + x + x;   } }

Translate a module.

 > m := module() export p; local q;     p := proc(x,y) if y>0 then trunc(x); else ceil(x); end if; end proc:     q := proc(x) sin(x)^2; end proc: end module:
 > $\mathrm{CSharp}\left(m,\mathrm{resultname}=\mathrm{t0}\right)$
 using System; public class m {   public static System.Int32 p (System.Double x, System.Int32 y)   {     if (0 < y)       return (System.Int32)(x);     else       return (System.Int32)Math.Ceiling(x);   }   private static System.Double q (System.Double x)   {     return Math.Pow(Math.Sin(x), 0.2e1);   } }

Translate a linear combination of hyperbolic trigonometric functions.

 > $\mathrm{CSharp}\left(2\mathrm{cosh}\left(x\right)-7\mathrm{tanh}\left(x\right)\right)$
 cg0 = 0.2e1 * (Math.Exp(x) + Math.Exp((-0.1e1) * x)) / 0.2e1 - 0.7e1 * (Math.Exp(0.2e1 * x) - 0.1e1) / (Math.Exp(0.2e1 * x) + 0.1e1);

Translate a procedure with no return value containing a printf statement.

 > f := proc(a::integer, p::integer)   printf("The integer remainder of %d divided by %d is: %d\n", a, p, irem(a, p)); end proc:
 > $\mathrm{CSharp}\left(f\right)$
 using System; public class CodeGenerationClass {   public static void f (System.Int32 a, System.Int32 p)   {     Console.WriteLine("The integer remainder of " + a + " divided by " + p + " is: " + a % p);   } }

Compatibility

 • The CodeGeneration[CSharp] command was introduced in Maple 15.