DelegateParameter2 Delegate

SWI-Prolog SbsSW.SwiPlCs

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Swi-cs-pl - A CSharp class library to connect .NET languages with SWI-Prolog DelegateParameter2 Delegate

Provide a predefined Delegate to register a C# method to be called from SWI-Prolog

Declaration Syntax

Visual Basic

Visual C++

public delegate bool DelegateParameter2(
	PlTerm term1,
	PlTerm term2
)

Public Delegate Function DelegateParameter2 ( _
	term1 As PlTerm, _
	term2 As PlTerm _
) As Boolean

public delegate bool DelegateParameter2(
	PlTerm term1, 
	PlTerm term2
)

Parameters

term1 (PlTerm)

term2 (PlTerm)

Return Value

true for succeeding otherwise false for fail

Examples

This example is for DelegateParameter2 and shows how o call a C# method with two parameter.

For other samples see the source file CallbackForeigenPredicate.cs in the TestSwiPl VS2008 test project.

CopyC#

public void t_in_out()
{
    Delegate replaceDelegate = new DelegateParameter2(atom_replace);
    PlEngine.RegisterForeign(replaceDelegate);
    for (int i = 1; i < 10; i++)
    {
        PlTermV arg = new PlTermV(new PlTerm("test_f"), PlTerm.PlVar());
        PlQuery.PlCall("atom_replace", arg);
        Assert.AreEqual("test_xx_f", arg[1].ToString(), "atom_replace failed!");
    }
}
public static bool atom_replace(PlTerm atom_in, PlTerm atom_out)
{
    return atom_out.Unify(atom_in.ToString().Replace("_", "_xx_"));
}