internal void DeclareVariable(string name, BaseComputable value = null)
{
if (!VariableMapping.TryGetValue(name, out var idx))
{
idx = VariableMapping.Count;
VariableMapping[name] = idx;
}
Variables[idx] = value;
}
internal void DeclareGlobalVariable(string name, BaseComputable value = null)
{
int idx = GlobalVariableMapping.Count;
if (!GlobalVariableMapping.TryAdd(name, idx))
{
throw new System.Exception($"{name} is already defined");
}
GlobalVariables[idx] = value;
}
public override BaseComputable ExecuteOperation(string opr, BaseComputable rigth)
{
if (rigth is SimpleValue r)
{
switch (opr)
{
case "+":
return(new SimpleValue(_value + r._value));
case "-":
return(new SimpleValue(_value - r._value));
case "*":
return(new SimpleValue(_value * r._value));
case "/":
return(new SimpleValue(_value / r._value));
case "==":
return(new SimpleValue(_value == r._value ? 1 : 0));
case "<>":
return(new SimpleValue(_value != r._value ? 1 : 0));
case "<":
return(new SimpleValue(_value < r._value ? 1 : 0));
case ">":
return(new SimpleValue(_value > r._value ? 1 : 0));
case ">=":
return(new SimpleValue(_value >= r._value ? 1 : 0));
case "<=":
return(new SimpleValue(_value <= r._value ? 1 : 0));
case "&&":
return(new SimpleValue(_value & r._value));
case "||":
return(new SimpleValue(_value | r._value));
default: throw new Exception($"operator {opr} is unknown");
}
}
return(base.ExecuteOperation(opr, rigth));
}
public override BaseComputable ExecuteOperation(string opr, BaseComputable rigth)
{
if (rigth is Str s)
{
switch (opr)
{
case "+":
var tmp = new SimpleValue[_value.Length + s._value.Length];
_value.CopyTo(tmp, 0);
s._value.CopyTo(tmp, _value.Length);
return(new Str(tmp));
case "==":
return(new SimpleValue(Enumerable.SequenceEqual(_value, s._value) ? 1 : 0));
case "<>":
return(new SimpleValue(Enumerable.SequenceEqual(_value, s._value) ? 0 : 1));
default: throw new Exception($"operator {opr} is unknown");
}
}
return(base.ExecuteOperation(opr, rigth));
}
public ReturnException(BaseComputable value)
{
Value = value;
}
public virtual BaseComputable ExecuteOperation(string opr, BaseComputable rigth)
{
throw new System.Exception("Variable doesn't support operator " + opr);
}
