public override void Compile(Emitter.Emitter emitter)
{
var leftType = Left.GetExpressionType(emitter);
var rightType = Right.GetExpressionType(emitter);
var type = GetExpressionType(emitter);
// subtract matrices
if(type == "matrix")
{
Left.Compile(emitter);
Right.Compile(emitter);
var matrixType = typeof(MN.Matrix<double>);
var method = emitter.AssemblyImport(matrixType.GetMethod("Subtract", new [] { matrixType } ));
emitter.EmitCall(method);
}
// subtract dicts
else if (type == "dict")
{
Left.Compile(emitter);
Right.Compile(emitter);
var dictType = typeof(Dict);
var method = emitter.AssemblyImport(dictType.GetMethod("Subtract", new[] { dictType }));
emitter.EmitCall(method);
}
// subtract complex numbers
else if (type == "complex")
{
Left.Compile(emitter);
if (leftType != "complex")
{
emitter.EmitUpcastBasicType(leftType, "float");
emitter.EmitLoadFloat(0);
emitter.EmitNewObj(emitter.FindMethod("complex", ".ctor", "float", "float"));
}
Right.Compile(emitter);
if (rightType != "complex")
{
emitter.EmitUpcastBasicType(rightType, "float");
emitter.EmitLoadFloat(0);
emitter.EmitNewObj(emitter.FindMethod("complex", ".ctor", "float", "float"));
}
emitter.EmitCall(emitter.AssemblyImport(typeof(SN.Complex).GetMethod("op_Subtraction", new[] { typeof(SN.Complex), typeof(SN.Complex) })));
}
// add floating point numbers or integers
else if (type.IsAnyOf("int", "float"))
{
Left.Compile(emitter);
emitter.EmitUpcastBasicType(leftType, type);
Right.Compile(emitter);
emitter.EmitUpcastBasicType(rightType, type);
emitter.EmitSub();
}
}