/// <summary> /// Call when a variable has been encountered. /// </summary> /// <param name="args">The event arguments.</param> protected void OnVariableFound(VariableFoundEventArgs <T> args) => VariableFound?.Invoke(this, args);
/// <inheritdoc/>
public override void Push(Node node)
{
Label lblBypass, lblEnd;
switch (node)
{
case BinaryOperatorNode bn:
// Execution
switch (bn.NodeType)
{
case NodeTypes.Add:
Call(Complex.Add, new[] { bn.Left, bn.Right });
return;
case NodeTypes.Subtract:
Call(Complex.Subtract, new[] { bn.Left, bn.Right });
return;
case NodeTypes.Multiply:
Call(Complex.Multiply, new[] { bn.Left, bn.Right });
return;
case NodeTypes.Divide:
Push(bn.Left);
Push(bn.Right);
Generator.Emit(OpCodes.Call, _safeDiv);
return;
case NodeTypes.Modulo:
PushReal(bn.Left);
PushReal(bn.Right);
Generator.Emit(OpCodes.Rem);
RealToComplex();
return;
case NodeTypes.GreaterThan:
PushReal(bn.Left);
PushReal(bn.Right);
PushCheck(OpCodes.Bgt_S, 1.0, 0.0);
return;
case NodeTypes.LessThan:
PushReal(bn.Left);
PushReal(bn.Right);
PushCheck(OpCodes.Blt_S, 1.0, 0.0);
return;
case NodeTypes.GreaterThanOrEqual:
PushReal(bn.Left);
PushReal(bn.Right);
PushCheck(OpCodes.Bge_S, 1.0, 0.0);
return;
case NodeTypes.LessThanOrEqual:
PushReal(bn.Left);
PushReal(bn.Right);
PushCheck(OpCodes.Ble_S, 1.0, 0.0);
return;
case NodeTypes.Equals:
Push(bn.Left);
Push(bn.Right);
PushDouble(Builder.RelativeTolerance);
PushDouble(Builder.AbsoluteTolerance);
Generator.Emit(OpCodes.Call, _equals);
PushCheck(OpCodes.Brtrue_S, 1.0, 0.0);
return;
case NodeTypes.NotEquals:
Push(bn.Left);
Push(bn.Right);
PushDouble(Builder.RelativeTolerance);
PushDouble(Builder.AbsoluteTolerance);
Generator.Emit(OpCodes.Call, _equals);
PushCheck(OpCodes.Brfalse_S, 1.0, 0.0);
return;
case NodeTypes.And:
lblBypass = Generator.DefineLabel();
lblEnd = Generator.DefineLabel();
PushReal(bn.Left); PushDouble(0.5);
Generator.Emit(OpCodes.Ble_S, lblBypass);
PushReal(bn.Right); PushDouble(0.5);
Generator.Emit(OpCodes.Ble_S, lblBypass);
Push(new Complex(1.0, 0.0));
Generator.Emit(OpCodes.Br_S, lblEnd);
Generator.MarkLabel(lblBypass);
Push(new Complex());
Generator.MarkLabel(lblEnd);
return;
case NodeTypes.Or:
lblBypass = Generator.DefineLabel();
lblEnd = Generator.DefineLabel();
PushReal(bn.Left); PushDouble(0.5);
Generator.Emit(OpCodes.Bgt_S, lblBypass);
PushReal(bn.Right); PushDouble(0.5);
Generator.Emit(OpCodes.Bgt_S, lblBypass);
Push(new Complex());
Generator.Emit(OpCodes.Br_S, lblEnd);
Generator.MarkLabel(lblBypass);
Push(new Complex(1, 0));
Generator.MarkLabel(lblEnd);
return;
case NodeTypes.Xor:
PushReal(bn.Left); PushDouble(0.5);
Generator.Emit(OpCodes.Cgt);
PushReal(bn.Right); PushDouble(0.5);
Generator.Emit(OpCodes.Cgt);
Generator.Emit(OpCodes.Xor);
PushCheck(OpCodes.Brtrue, 1.0, 0.0);
return;
case NodeTypes.Pow:
Call(HelperFunctions.Power, new[] { bn.Left, bn.Right });
return;
}
break;
case ConstantNode cn:
Push(new Complex(cn.Literal, 0.0));
return;
case UnaryOperatorNode un:
switch (un.NodeType)
{
case NodeTypes.Plus:
Push(un.Argument);
return;
case NodeTypes.Minus:
Call(Complex.Negate, new[] { un.Argument });
return;
case NodeTypes.Not:
PushReal(un.Argument);
PushDouble(0.5);
PushCheck(OpCodes.Ble_S, 1.0, 0.0);
return;
}
break;
case FunctionNode fn:
var fnargs = new FunctionFoundEventArgs <Complex>(fn, this);
OnFunctionFound(fnargs);
if (!fnargs.Created)
{
throw new SpiceSharpException($"Unrecognized function {fn.Name}");
}
return;
case VariableNode vn:
var varargs = new VariableFoundEventArgs <Complex>(vn);
OnVariableFound(varargs);
if (varargs.Variable == null)
{
throw new SpiceSharpException($"Unrecognized variable {vn.Name}");
}
var variable = varargs.Variable;
Call(() => variable.Value);
return;
case TernaryOperatorNode tn:
lblBypass = Generator.DefineLabel();
lblEnd = Generator.DefineLabel();
PushReal(tn.Condition); PushDouble(0.5);
Generator.Emit(OpCodes.Ble_S, lblBypass);
Push(tn.IfTrue);
Generator.Emit(OpCodes.Br_S, lblEnd);
Generator.MarkLabel(lblBypass);
Push(tn.IfFalse);
Generator.MarkLabel(lblEnd);
return;
}
throw new Exception("Unrecognized node {0}".FormatString(node));
}
