bool Function(ElementBaseJson func, out FunctionExpression expr)
{
if (!Match(Kw(func.Name), false))
{
expr = null;
return(false);
}
// Get the parameter values.
List <ITTEExpression> values = new List <ITTEExpression>();
if (Match("("))
{
int currentParameter = 0;
do
{
ElementParameter parameter = null;
if (func.Parameters != null && currentParameter < func.Parameters.Length)
{
parameter = func.Parameters[currentParameter];
}
// Variable reference
if (parameter != null && parameter.IsVariableReference)
{
// Match the variable parameter.
if (!Identifier(out string identifier))
{
throw new Exception("Failed to retrieve identifier of variable parameter.");
}
AddIfOmitted(identifier, parameter.VariableReferenceIsGlobal.Value);
values.Add(new AnonymousVariableExpression(identifier, parameter.VariableReferenceIsGlobal.Value));
}
// Enumerator
else if (parameter?.Type != null && ElementRoot.Instance.TryGetEnum(parameter.Type, out var enumerator))
{
// Match enum member
foreach (var member in enumerator.Members.OrderByDescending(m => m.Name.Length))
{
if (Match(Kw(member.DecompileName()), false))
{
values.Add(new ConstantEnumeratorExpression(member));
break;
}
}
}
// Normal parameter
else
{
if (ContainExpression(out ITTEExpression value))
{
values.Add(value);
}
}
// Increment the current parameter.
currentParameter++;
}while (Match(","));
Match(")");
}
expr = new FunctionExpression(func, values.ToArray());
return(true);
}
public FunctionExpression(ElementBaseJson function, ITTEExpression[] values)
{
Function = function;
Values = values;
}