// This returns an IEnumerable.
static InvokersParametersPair ParseImplementation(string s)
{
// Call to the native parsing lib PPparsing
var tokens = NativeParsing.GetTokensRange(s);
// get Commands with the right name
var commands = commandsSniffer.GetValue(NativeParsing.GetMemory(s, tokens[0]));
if (commands != null)
{
// there is a Command with such name
{
var command = commands.GetIfOneLongArgument;
if (command != null)
{
// command has one long argument
return(JustOneArgument(command, NativeParsing.GetTailMemory(s, tokens[0]).TrimStart()));
}
}
tokens = tokens.Slice(1);
var commandsWithRightArgumentCount = commands.GetValue(tokens.Length);
if (commandsWithRightArgumentCount != null)
{
// there are some Commands with the corresponing argument count
return(commandsWithRightArgumentCount, NativeParsing.MakeMemories(s, tokens));
}
else
{
// there are no Commands with that argument count
return(JustOneArgument(commandsSniffer.BadArgumentCountCommand, tokens.Length));
}
}
else
{
// command with that name doesn't exist
return(JustOneArgument(commandsSniffer.NotFoundCommand, s.AsMemory().TrimStart()));
}
}
// Here the IEnumerable from ParseImplementation is wrapped in an Invoker
// that invokes the elements in order
public (IInvoker <IApplication, object[]>, object[]) Parse(string input)
{
var(commands, arguments) = ParseImplementation(input);
NativeParsing.ReleaseResources();
return(new EnumerableInvoker <IApplication, object[]>(commands), arguments);
}