public double ExecAst(IAstNode root)
{
switch (root)
{
case AstNumberNode numberNode:
return(numberNode.Number);
case AstVariableNode varNode:
if (Constants.TryGetValue(varNode.Id, out var val))
{
return(val);
}
else if (Variables.TryGetValue(varNode.Id, out val))
{
return(val);
}
else
{
if (Setting.DebugMode)
{
Sync.Tools.IO.CurrentIO.WriteColor($"[RTPP:Expression]No Variable found (return zero). Variable name: { varNode.Id }", ConsoleColor.Yellow);
}
return(0);
}
case AstOpNode opNode:
switch (opNode.Op)
{
case "+":
return(ExecAst(opNode.LNode) + ExecAst(opNode.RNode));
case "-":
return(ExecAst(opNode.LNode) - ExecAst(opNode.RNode));
case "*":
return(ExecAst(opNode.LNode) * ExecAst(opNode.RNode));
case "/":
return(ExecAst(opNode.LNode) / ExecAst(opNode.RNode));
case "%":
return(ExecAst(opNode.LNode) % ExecAst(opNode.RNode));
case "^":
return(Math.Pow(ExecAst(opNode.LNode), ExecAst(opNode.RNode)));
case ">":
return((ExecAst(opNode.LNode) > ExecAst(opNode.RNode)) ? 1 : 0);
case "<":
return((ExecAst(opNode.LNode) < ExecAst(opNode.RNode)) ? 1 : 0);
case ">=":
return((ExecAst(opNode.LNode) >= ExecAst(opNode.RNode)) ? 1 : 0);
case "<=":
return((ExecAst(opNode.LNode) <= ExecAst(opNode.RNode)) ? 1 : 0);
case "==":
return(IsNotZero(ExecAst(opNode.LNode) - ExecAst(opNode.RNode)) ? 0 : 1);
case "!=":
return(IsNotZero(ExecAst(opNode.LNode) - ExecAst(opNode.RNode)) ? 1 : 0);
case "!":
return(IsNotZero(ExecAst(opNode.LNode)) ? 0 : 1);
case "&&":
return((IsNotZero(ExecAst(opNode.LNode)) && IsNotZero(ExecAst(opNode.RNode))) ? 1 : 0);
case "||":
return((IsNotZero(ExecAst(opNode.LNode)) || IsNotZero(ExecAst(opNode.RNode))) ? 1 : 0);
}
break;
case AstFunctionNode funcNode:
try
{
if (funcNode.Id == "set")
{
AstVariableNode varNode = funcNode.Args[0] as AstVariableNode;
string varName = varNode?.Id ?? throw new ExpressionException($"The \"{funcNode.Id}()\" first parameter is the variable name.");
double varVal = ExecAst(funcNode.Args[1]);
Variables[varName] = varVal;
return(0);
}
else if (funcNode.Id == "if")
{
IAstNode condNode = funcNode.Args[0];
double condNodeResult = ExecAst(condNode);
if (Math.Abs(condNodeResult) <= 1e-5)
{
//false_expr
return(ExecAst(funcNode.Args[2]));
}
else
{
//true_expr
return(ExecAst(funcNode.Args[1]));
}
}
else if (funcNode.Id == "smooth")
{
AstVariableNode varNode = funcNode.Args[0] as AstVariableNode;
string varName = varNode?.Id ?? throw new ExpressionException($"The \"{funcNode.Id}()\" first parameter is the variable name.");
double varVal = ExecAst(funcNode.Args[0]);
return(SmoothMath.SmoothVariable(varName, varVal));
}
else
{
if (Functions.TryGetValue(funcNode.Id, out var func))
{
return(func(ComputeArgs(funcNode.Args)));
}
else
{
throw new ExpressionException($"No function found. Fucntion: {funcNode.Id}");
}
}
}
catch (ArgumentOutOfRangeException)
{
throw new ExpressionException($"The function is missing a parameter. Fucntion: {funcNode.Id}");
}
}
return(Double.NaN);
}
public double ExecAst(IAstNode root)
{
switch (root)
{
case AstNumberNode numberNode:
return(numberNode.Number);
case AstVariableNode varNode:
if (Constants.TryGetValue(varNode.Id, out var val))
{
return(val);
}
else if (Variables.TryGetValue(varNode.Id, out val))
{
return(val);
}
else
{
Sync.Tools.IO.CurrentIO.WriteColor($"[RTPP:Expression]No Variable found (return zero). Variable name: { varNode.Id }", ConsoleColor.Yellow);
return(0);
}
case AstOpNode opNode:
switch (opNode.Op)
{
case "+":
return(ExecAst(opNode.LNode) + ExecAst(opNode.RNode));
case "-":
return(ExecAst(opNode.LNode) - ExecAst(opNode.RNode));
case "*":
return(ExecAst(opNode.LNode) * ExecAst(opNode.RNode));
case "/":
return(ExecAst(opNode.LNode) / ExecAst(opNode.RNode));
case "^":
return(Math.Pow(ExecAst(opNode.LNode), ExecAst(opNode.RNode)));
}
break;
case AstFunctionNode funcNode:
try
{
if (funcNode.Id == "set")
{
AstVariableNode varNode = funcNode.Args[0] as AstVariableNode;
string varName = varNode?.Id ?? throw new ExpressionException("The first parameter is the variable name.");
double varVal = ExecAst(funcNode.Args[1]);
Variables[varName] = varVal;
return(0);
}
else
{
if (Functions.TryGetValue(funcNode.Id, out var func))
{
return(func(ComputeArgs(funcNode.Args)));
}
else
{
throw new ExpressionException($"No function found. Fucntion: {funcNode.Id}");
}
}
}
catch (ArgumentOutOfRangeException)
{
throw new ExpressionException($"The function is missing a parameter. Fucntion: {funcNode.Id}");
}
}
return(Double.NaN);
}
