/// <summary>
/// Execute an operator.
/// </summary>
/// <param name="op">The operator.</param>
protected override void ExecuteOperator(Operator op)
{
Derivatives <Expression> a, b;
switch (op)
{
case TernaryOperator to:
b = _stack.Pop();
a = _stack.Pop();
_stack.Push(_stack.Pop().IfThenElse(a, b));
break;
case ClosingTernaryOperator _:
break;
case FunctionOperator fo:
// Extract all arguments for the method
var arguments = new Derivatives <Expression> [fo.Arguments];
for (var i = fo.Arguments - 1; i >= 0; i--)
{
arguments[i] = _stack.Pop();
}
var args = new FunctionFoundEventArgs <Derivatives <Expression> >(fo.Name, null, arguments);
// Ask around for the result of this method
FunctionFound?.Invoke(this, args);
if (!args.Found || args.Result == null)
{
throw new ParserException("Unrecognized method '{0}()'".FormatString(fo.Name), Input, Index);
}
_stack.Push(args.Result);
break;
case BracketOperator _:
break;
case ArgumentOperator _:
break;
case ArithmeticOperator ao:
switch (ao.Type)
{
case OperatorType.Positive:
break;
case OperatorType.Negative:
_stack.Push(_stack.Pop().Negate());
break;
case OperatorType.Not:
_stack.Push(_stack.Pop().Not());
break;
case OperatorType.Add:
b = _stack.Pop();
_stack.Push(_stack.Pop().Add(b));
break;
case OperatorType.Subtract:
b = _stack.Pop();
_stack.Push(_stack.Pop().Subtract(b));
break;
case OperatorType.Multiply:
b = _stack.Pop();
_stack.Push(_stack.Pop().Multiply(b));
break;
case OperatorType.Divide:
b = _stack.Pop();
_stack.Push(_stack.Pop().Divide(b));
break;
case OperatorType.Power:
b = _stack.Pop();
_stack.Push(_stack.Pop().Pow(b));
break;
case OperatorType.ConditionalOr:
b = _stack.Pop();
_stack.Push(_stack.Pop().Or(b));
break;
case OperatorType.ConditionalAnd:
b = _stack.Pop();
_stack.Push(_stack.Pop().And(b));
break;
case OperatorType.GreaterThan:
b = _stack.Pop();
_stack.Push(_stack.Pop().GreaterThan(b));
break;
case OperatorType.LessThan:
b = _stack.Pop();
_stack.Push(_stack.Pop().LessThan(b));
break;
case OperatorType.GreaterThanOrEqual:
b = _stack.Pop();
_stack.Push(_stack.Pop().GreaterOrEqual(b));
break;
case OperatorType.LessThanOrEqual:
b = _stack.Pop();
_stack.Push(_stack.Pop().LessOrEqual(b));
break;
case OperatorType.IsEqual:
b = _stack.Pop();
_stack.Push(_stack.Pop().Equal(b));
break;
case OperatorType.IsNotEqual:
b = _stack.Pop();
_stack.Push(_stack.Pop().NotEqual(b));
break;
default:
throw new ParserException("Unimplemented arithmetic operator", Input, Index);
}
break;
default:
throw new ParserException("Unimplemented operator", Input, Index);
}
}
/// <summary>
/// Execute an operator.
/// </summary>
/// <param name="op">The operator.</param>
protected override void ExecuteOperator(Operator op)
{
Expression a, b;
switch (op)
{
case TernaryOperator to:
b = _stack.Pop();
a = _stack.Pop();
_stack.Push(Expression.Condition(_stack.Pop(), a, b));
break;
case ClosingTernaryOperator _:
break;
case FunctionOperator fo:
// Extract all arguments for the method
var arguments = new Expression[fo.Arguments];
for (var i = fo.Arguments - 1; i >= 0; i--)
{
arguments[i] = _stack.Pop();
}
var args = new FunctionFoundEventArgs <Expression>(fo.Name, null, arguments);
// Ask around for the result of this method
FunctionFound?.Invoke(this, args);
if (args.Result == null)
{
throw new ParserException("Unrecognized method '{0}()'".FormatString(fo.Name), Input, Index);
}
_stack.Push(args.Result);
break;
case BracketOperator _:
break;
case ArgumentOperator _:
break;
case ArithmeticOperator ao:
switch (ao.Type)
{
case OperatorType.Positive:
break;
case OperatorType.Negative:
_stack.Push(Expression.Negate(_stack.Pop()));
break;
case OperatorType.Not:
_stack.Push(Expression.Condition(Expression.Equal(_stack.Pop(), Zero), Zero, One));
break;
case OperatorType.Add:
a = _stack.Pop();
_stack.Push(Expression.Add(_stack.Pop(), a));
break;
case OperatorType.Subtract:
a = _stack.Pop();
_stack.Push(Expression.Subtract(_stack.Pop(), a));
break;
case OperatorType.Multiply:
_stack.Push(Expression.Multiply(_stack.Pop(), _stack.Pop()));
break;
case OperatorType.Divide:
a = _stack.Pop();
_stack.Push(Expression.Divide(_stack.Pop(), a));
break;
case OperatorType.Modulo:
a = _stack.Pop();
_stack.Push(Expression.Modulo(_stack.Pop(), a));
break;
case OperatorType.Power:
a = _stack.Pop();
_stack.Push(Expression.Call(PowInfo, _stack.Pop(), a));
break;
case OperatorType.ConditionalOr:
b = _stack.Pop();
a = _stack.Pop();
_stack.Push(Expression.Condition(Expression.And(
Expression.Equal(a, Zero),
Expression.Equal(b, Zero)), Zero, One));
break;
case OperatorType.ConditionalAnd:
b = _stack.Pop();
a = _stack.Pop();
_stack.Push(Expression.Condition(Expression.Or(
Expression.Equal(a, Zero),
Expression.Equal(b, Zero)), Zero, One));
break;
case OperatorType.GreaterThan:
a = _stack.Pop();
_stack.Push(Expression.GreaterThan(_stack.Pop(), a));
break;
case OperatorType.LessThan:
a = _stack.Pop();
_stack.Push(Expression.LessThan(_stack.Pop(), a));
break;
case OperatorType.GreaterThanOrEqual:
a = _stack.Pop();
_stack.Push(Expression.GreaterThanOrEqual(_stack.Pop(), a));
break;
case OperatorType.LessThanOrEqual:
a = _stack.Pop();
_stack.Push(Expression.LessThanOrEqual(_stack.Pop(), a));
break;
case OperatorType.OpenTernary:
default:
throw new ParserException("Unimplemented arithmetic operator", Input, Index);
}
break;
default:
throw new ParserException("Unimplemented operator", Input, Index);
}
}
/// <summary>
/// Execute an operator.
/// </summary>
/// <param name="op">The operator.</param>
protected override void ExecuteOperator(Operator op)
{
double a, b;
switch (op)
{
case TernaryOperator to:
b = _stack.Pop();
a = _stack.Pop();
_stack.Push(_stack.Pop().Equals(0.0) ? b : a);
break;
case ClosingTernaryOperator _:
break;
case FunctionOperator fo:
// Extract all arguments for the method
var arguments = new double[fo.Arguments];
for (var i = fo.Arguments - 1; i >= 0; i--)
{
arguments[i] = _stack.Pop();
}
var args = new FunctionFoundEventArgs <double>(fo.Name, double.NaN, arguments);
// Ask around for the result of this method
FunctionFound?.Invoke(this, args);
if (!args.Found)
{
throw new ParserException("Unrecognized method '{0}()'".FormatString(fo.Name), Input, Index);
}
_stack.Push(args.Result);
break;
case BracketOperator _:
break;
case ArgumentOperator _:
break;
case ArithmeticOperator ao:
switch (ao.Type)
{
case OperatorType.Positive:
break;
case OperatorType.Negative:
_stack.Push(-_stack.Pop());
break;
case OperatorType.Not:
_stack.Push(_stack.Pop().Equals(0.0) ? 0.0 : 1.0);
break;
case OperatorType.Add:
_stack.Push(_stack.Pop() + _stack.Pop());
break;
case OperatorType.Subtract:
a = _stack.Pop();
_stack.Push(_stack.Pop() - a);
break;
case OperatorType.Multiply:
_stack.Push(_stack.Pop() * _stack.Pop());
break;
case OperatorType.Divide:
a = _stack.Pop();
_stack.Push(_stack.Pop() / a);
break;
case OperatorType.Modulo:
a = _stack.Pop();
_stack.Push(_stack.Pop() % a);
break;
case OperatorType.Power:
a = _stack.Pop();
_stack.Push(Math.Pow(_stack.Pop(), a));
break;
case OperatorType.ConditionalOr:
b = _stack.Pop();
a = _stack.Pop();
_stack.Push(a.Equals(0.0) && b.Equals(0.0) ? 0.0 : 1.0);
break;
case OperatorType.ConditionalAnd:
b = _stack.Pop();
a = _stack.Pop();
_stack.Push(a.Equals(0.0) || b.Equals(0.0) ? 0.0 : 1.0);
break;
case OperatorType.GreaterThan:
b = _stack.Pop();
a = _stack.Pop();
_stack.Push(a > b ? 1.0 : 0.0);
break;
case OperatorType.LessThan:
b = _stack.Pop();
a = _stack.Pop();
_stack.Push(a < b ? 1.0 : 0.0);
break;
case OperatorType.GreaterThanOrEqual:
b = _stack.Pop();
a = _stack.Pop();
_stack.Push(a >= b ? 1.0 : 0.0);
break;
case OperatorType.LessThanOrEqual:
b = _stack.Pop();
a = _stack.Pop();
_stack.Push(a <= b ? 1.0 : 0.0);
break;
case OperatorType.IsEqual:
b = _stack.Pop();
a = _stack.Pop();
_stack.Push(Math.Abs(a - b) <= EqualityTolerance ? 1.0 : 0.0);
break;
case OperatorType.IsNotEqual:
b = _stack.Pop();
a = _stack.Pop();
_stack.Push(Math.Abs(a - b) > EqualityTolerance ? 1.0 : 0.0);
break;
default:
throw new ParserException("Unimplemented arithmetic operator", Input, Index);
}
break;
default:
throw new ParserException("Unimplemented operator", Input, Index);
}
}