/// <summary>
/// Base class for all unary operators.
/// </summary>
/// <param name="Operand">Operand.</param>
/// <param name="Start">Start position in script expression.</param>
/// <param name="Length">Length of expression covered by node.</param>
/// <param name="Expression">Expression containing script.</param>
public UnaryOperator(ScriptNode Operand, int Start, int Length, Expression Expression)
: base(Start, Length, Expression)
{
this.op = Operand;
}
/// <summary>
/// Base class for binary double operators.
/// </summary>
/// <param name="Left">Left operand.</param>
/// <param name="Right">Right operand.</param>
/// <param name="Start">Start position in script expression.</param>
/// <param name="Length">Length of expression covered by node.</param>
/// <param name="Expression">Expression containing script.</param>
public BinaryDoubleOperator(ScriptNode Left, ScriptNode Right, int Start, int Length, Expression Expression)
: base(Left, Right, Start, Length, Expression)
{
}
/// <summary>
/// Base class for all quaternary operators.
/// </summary>
/// <param name="Left">Left operand.</param>
/// <param name="Middle1">First Middle operand.</param>
/// <param name="Middle2">Second Middle operand.</param>
/// <param name="Right">Right operand.</param>
/// <param name="Start">Start position in script expression.</param>
/// <param name="Length">Length of expression covered by node.</param>
/// <param name="Expression">Expression containing script.</param>
public QuaternaryOperator(ScriptNode Left, ScriptNode Middle1, ScriptNode Middle2, ScriptNode Right, int Start, int Length, Expression Expression)
: base(Left, Middle1, Right, Start, Length, Expression)
{
this.middle2 = Middle2;
}
/// <summary>
/// Base class for all unary operators performing operand null checks.
/// </summary>
/// <param name="Left">Left operand.</param>
/// <param name="Middle">Middle operand.</param>
/// <param name="Right">Right operand.</param>
/// <param name="NullCheck">If null should be returned if left operand is null.</param>
/// <param name="Start">Start position in script expression.</param>
/// <param name="Length">Length of expression covered by node.</param>
/// <param name="Expression">Expression containing script.</param>
public NullCheckTernaryOperator(ScriptNode Left, ScriptNode Middle, ScriptNode Right, bool NullCheck, int Start, int Length, Expression Expression)
: base(Left, Middle, Right, Start, Length, Expression)
{
this.nullCheck = NullCheck;
}
/// <summary>
/// Base class for funcions of one scalar variable.
/// </summary>
/// <param name="Argument1">Argument 1.</param>
/// <param name="Argument2">Argument 2.</param>
/// <param name="Start">Start position in script expression.</param>
/// <param name="Length">Length of expression covered by node.</param>
/// <param name="Expression">Expression containing script.</param>
public FunctionTwoScalarVariables(ScriptNode Argument1, ScriptNode Argument2, int Start, int Length, Expression Expression)
: base(Argument1, Argument2, Start, Length, Expression)
{
}
/// <summary>
/// Base class for funcions of one variable.
/// </summary>
/// <param name="Argument">Argument.</param>
/// <param name="Start">Start position in script expression.</param>
/// <param name="Length">Length of expression covered by node.</param>
/// <param name="Expression">Expression containing script.</param>
public FunctionOneVariable(ScriptNode Argument, int Start, int Length, Expression Expression)
: base(Start, Length, Expression)
{
this.argument = Argument;
}
/// <summary>
/// Implements the differentiation chain rule, by differentiating the argument and multiplying it to the differentiation of the main node.
/// </summary>
/// <param name="VariableName">Name of variable to differentiate on.</param>
/// <param name="Variables">Collection of variables.</param>
/// <param name="Argument">Inner argument</param>
/// <param name="Differentiation">Differentiation of main node.</param>
/// <returns><paramref name="Differentiation"/>*D(<paramref name="Argument"/>)</returns>
protected ScriptNode DifferentiationChainRule(string VariableName, Variables Variables, ScriptNode Argument, ScriptNode Differentiation)
{
if (Argument is IDifferentiable Differentiable)
{
ScriptNode ChainFactor = Differentiable.Differentiate(VariableName, Variables);
if (ChainFactor is ConstantElement ConstantElement &&
ConstantElement.Constant is DoubleNumber DoubleNumber)
{
if (DoubleNumber.Value == 0)
{
return(ConstantElement);
}
else if (DoubleNumber.Value == 1)
{
return(Differentiation);
}
}
int Start = this.Start;
int Len = this.Length;
Expression Exp = this.Expression;
if (Differentiation is Invert Invert)
{
if (Invert.Operand is Negate Negate)
{
return(new Negate(new Divide(ChainFactor, Negate.Operand, Start, Len, Expression), Start, Len, Exp));
}
else
{
return(new Divide(ChainFactor, Invert.Operand, Start, Len, Exp));
}
}
else if (Differentiation is Negate Negate)
{
if (Negate.Operand is Invert Invert2)
{
return(new Negate(new Divide(ChainFactor, Invert2.Operand, Start, Len, Expression), Start, Len, Exp));
}
else
{
return(new Negate(new Multiply(Negate.Operand, ChainFactor, Start, Len, Expression), Start, Len, Exp));
}
}
else
{
return(new Multiply(Differentiation, ChainFactor, Start, Len, Exp));
}
}
else
{
throw new ScriptRuntimeException("Argument not differentiable.", this);
}
}
/// <summary>
/// Calculates a hash code for the contents of an array.
/// </summary>
/// <param name="Node">Node. Can be null.</param>
/// <returns>Hash code</returns>
public static int GetHashCode(ScriptNode Node)
{
return(Node?.GetHashCode() ?? 0);
}
/// <summary>
/// Base class for all binary operators.
/// </summary>
/// <param name="Left">Left operand.</param>
/// <param name="Right">Right operand.</param>
/// <param name="Start">Start position in script expression.</param>
/// <param name="Length">Length of expression covered by node.</param>
/// <param name="Expression">Expression containing script.</param>
public BinaryOperator(ScriptNode Left, ScriptNode Right, int Start, int Length, Expression Expression)
: base(Start, Length, Expression)
{
this.left = Left;
this.right = Right;
}
/// <summary>
/// Base class for binary double operators.
/// </summary>
/// <param name="Operand">Operand.</param>
/// <param name="Start">Start position in script expression.</param>
/// <param name="Length">Length of expression covered by node.</param>
/// <param name="Expression">Expression containing script.</param>
public UnaryDoubleOperator(ScriptNode Operand, int Start, int Length, Expression Expression)
: base(Operand, Start, Length, Expression)
{
}
/// <summary>
/// Base class for funcions of one variable.
/// </summary>
/// <param name="Argument1">Argument 1.</param>
/// <param name="Argument2">Argument 2.</param>
/// <param name="Start">Start position in script expression.</param>
/// <param name="Length">Length of expression covered by node.</param>
/// <param name="Expression">Expression containing script.</param>
public FunctionTwoVariables(ScriptNode Argument1, ScriptNode Argument2, int Start, int Length, Expression Expression)
: base(Start, Length, Expression)
{
this.argument1 = Argument1;
this.argument2 = Argument2;
}
/// <summary>
/// Base class for all ternary operators.
/// </summary>
/// <param name="Left">Left operand.</param>
/// <param name="Middle">Middle operand.</param>
/// <param name="Right">Right operand.</param>
/// <param name="Start">Start position in script expression.</param>
/// <param name="Length">Length of expression covered by node.</param>
/// <param name="Expression">Expression containing script.</param>
public TernaryOperator(ScriptNode Left, ScriptNode Middle, ScriptNode Right, int Start, int Length, Expression Expression)
: base(Left, Right, Start, Length, Expression)
{
this.middle = Middle;
}
/// <summary>
/// Base class for funcions of one vector variable.
/// </summary>
/// <param name="Argument">Argument.</param>
/// <param name="Start">Start position in script expression.</param>
/// <param name="Length">Length of expression covered by node.</param>
/// <param name="Expression">Expression containing script.</param>
public FunctionOneVectorVariable(ScriptNode Argument, int Start, int Length, Expression Expression)
: base(Argument, Start, Length, Expression)
{
}