public static AstVisitAction Visit(this AstVisitor astVisitor, Ast ast)
{
var dispatchMethodInfos = from dmi in astVisitor.GetType().GetMethods()
where dmi.Name.StartsWith("Visit")
let parameterType = dmi.GetParameters().Single().ParameterType
where parameterType.IsAssignableFrom(ast)
orderby parameterType.GetDerivationRank(ast)
select dmi;
if (dispatchMethodInfos.Any())
{
try
{
return((AstVisitAction)dispatchMethodInfos.First().Invoke(astVisitor, new[] { ast }));
}
catch (TargetInvocationException targetInvocationException)
{
throw targetInvocationException.InnerException;
}
}
else
{
throw new InvalidOperationException(ast.ToString());
}
}
