private void OnUnknownVariable(UnknownIdentifierEventArgs e)
{
if (this.UnknownVariable != null)
{
this.UnknownVariable(this, e);
}
}
private String EvalVar(String exp)
{
// Is the variable registered?
if (this.Variables.ContainsKey(exp.ToLower()))
{
// Return variable value
return(this.Variables[exp.ToLower()]);
}
var e = new UnknownIdentifierEventArgs
{
ErrorBehaviour = ErrorBehaviour.Throw,
Identifier = exp.ToLower(),
Replacement = ""
};
// Raise UnknownVariable event
this.OnUnknownVariable(e);
switch (e.ErrorBehaviour)
{
case ErrorBehaviour.Ignore:
return("");
case ErrorBehaviour.Replace:
return(e.Replacement);
case ErrorBehaviour.Throw:
default:
throw new UnknownIdentifierException(
String.Format("The statement '{0}' is not a registered variable!", exp));
}
}
private void OnUnknownFunction(UnknownIdentifierEventArgs e)
{
if (this.UnknownFunction != null)
{
this.UnknownFunction(this, e);
}
}
private String EvalFunc(String exp)
{
// Evaluate statement, enable quoting (can contain other statements)
exp = this.Eval(exp, true);
Match match = this.m_FuncRegex.Match(exp);
// Is this a valid function call?
if (match.Success)
{
// Get the name of the Function
string name = match.Groups["Name"].Value;
// Is the function registered?
if (this.Functions.ContainsKey(name))
{
// Compute function arguments
var args = new List <String>();
foreach (Capture cap in match.Groups["Parameter"].Captures)
{
args.Add(cap.Value);
}
// Call the function and return the value
return(this.Functions[name](args.ToArray()));
}
else
{
var e = new UnknownIdentifierEventArgs
{
ErrorBehaviour = ErrorBehaviour.Throw,
Identifier = name,
Replacement = ""
};
// Raise UnknownFunction event
this.OnUnknownFunction(e);
switch (e.ErrorBehaviour)
{
case ErrorBehaviour.Ignore:
return("");
case ErrorBehaviour.Replace:
return(e.Replacement);
case ErrorBehaviour.Throw:
default:
throw new UnknownIdentifierException(
String.Format("The function '{0}' is not a registered function!", name));
}
}
}
throw new InvalidStatementException(String.Format("The statement '{0}' is not a valid function call!", exp));
}