public override void Evaluate()
{
targetVariable = ParentContext.FindOrCreateVariable(RegexMatch.Groups[1].Value);
targetCommand = Command.Get(RegexMatch.Groups[2].Value, ParentContext);
if (!objToBool(targetVariable.Value, out originalValue))
{
throw new Exception("Value type error");
}
ParentContext.Lock(this);
State = ExecutionState.DONE;
}
public Variable CreateVariable(string varName)
{
varName = varName.ToLower();
var v = new Variable();
Variables.Add(varName, v);
return v;
}
// Check if this expression term represents a registered variable
private bool TryParseVariable(String text)
{
if (this.Variable != null)
{
Value = this.Variable.Value;
return true;
}
else
{
bool startsWithAtSign = text.StartsWith("@");
Variable variable = executionContext.FindVariable(startsWithAtSign ? text.Substring(1) : text);
if (variable != null)
{
IsStatic = startsWithAtSign;
Value = variable.Value;
Variable = variable;
return true;
}
return false;
}
}
// Check if this expression term represents a registered variable
private bool TryParseVariable(String text)
{
if (this.Variable != null)
{
Value = this.Variable.Value;
return true;
}
else
{
bool startsWithAtSign = text.StartsWith("@");
String variableName = startsWithAtSign ? text.Substring(1) : text;
Variable variable = executionContext.FindVariable(variableName);
if (variable != null)
{
if (variable.Value is SpecialValue)
{
IsStatic = startsWithAtSign;
if (IsStatic)
{
Variable = variable;
Value = Variable.Value;
}
else
{
EvalDlg = delegate()
{
executionContext.UpdateLock(variableName);
Value = variable.Value;
};
EvalDlg();
}
return true;
}
else
{
EvalDlg = delegate()
{
executionContext.UpdateLock(variableName);
Value = variable.Value;
};
EvalDlg();
return true;
}
}
return false;
}
}
