public Expression Get(IToken token, Expression[] args, Expression[] contextArgs, ErrorListener errors)
{
string errorDetails = null;
Type[] types = args.Select(arg => arg.Type).ToArray();
try
{
BuiltinExecutor executor = this.Executors.FirstOrDefault(ex => ex.InputArgs.Match(types, ex.IsQueryValueSupported));
// contextArgs currently are very straightforward. BodyQuery and TwinChangeIncludes use them to get message body.
// Not doing a match on internal args to retrieve the executor as of yet
if (executor != null)
{
if (executor.IsQueryValueSupported)
{
// Wrap all args as QueryValue
args = WrapArgsAsQueryValue(args);
}
return(executor.ExecutorFunc(args, contextArgs));
}
}
catch (Exception ex) when(!ex.IsFatal())
{
errorDetails = ex.Message;
}
errors.ArgumentError(token, this.Executors.Select(ex => ex.InputArgs).ToArray(), types, errorDetails);
return(Expression.Constant(Undefined.Instance));
}