public override Verb CreateVerb(string[] tokens)
{
var functionName = tokens[2];
Color(position, tokens[1].Length, Whitespaces);
Color(functionName.Length, IsClassName(functionName) ? Types : Invokeables);
Color(tokens[3].Length, Structures);
Color(tokens[4].Length, Whitespaces);
if (GetExpression(source, NextPosition, CloseParenthesis()) is Some <(Block, int)> some)
{
(var block, var index) = some.Value;
var arguments = new Arguments(block);
var blockOrLambdaParser = new BlockOrLambdaParser();
if (blockOrLambdaParser.Scan(source, index))
{
index = blockOrLambdaParser.Position;
var value = blockOrLambdaParser.Value;
arguments.AddArgument(value);
}
overridePosition = index;
return(new FunctionInvoke(functionName, arguments));
}
return(null);
}
public override Verb CreateVerb(string[] tokens)
{
var message = tokens[2];
Color(position, tokens[1].Length, Structures);
Color(message.Length, Messaging);
Block actualArguments;
Block executable = null;
Parameters parameters = null;
var index = position + length;
var bracket = tokens[3];
Lambda lambda = null;
if (bracket == "(")
{
Color(1, Structures);
if (GetExpression(source, index, CloseParenthesis()).If(out actualArguments, out var newIndex))
{
index = newIndex;
}
else
{
actualArguments = new Block();
}
}
else
{
actualArguments = new Block();
}
if (blockOrLambdaParser.Scan(source, index))
{
overridePosition = blockOrLambdaParser.Result.Position;
if (blockOrLambdaParser.Result.Verb is IExecutable e)
{
parameters = e.Parameters;
executable = e.Action;
MessagingState.RegisterMessageCall(message);
var arguments = new Arguments(actualArguments, executable, parameters);
if (lambda != null)
{
arguments.AddArgument(lambda);
}
result.Value = new Message(message, arguments);
}
}
return(new NullOp());
}
public IMaybe <(int, string, Lambda)> Parse(string source, int index)
{
if (matcher.IsMatch(source.Substring(index), @"^ /(':') /('while' | 'until')"))
{
Color(index, matcher[0, 1].Length, Structures);
var word = matcher[0, 2];
Color(word.Length, Messaging);
if (blockParser.Scan(source, index + matcher[0].Length))
{
var result = blockParser.Result;
var value = result.Value;
if (!(value is Lambda lambda))
{
lambda = new Lambda(new Region(), (Block)value, new Parameters(), false);
}
index = result.Position;
word = word.ToTitleCase();
return((index, word, lambda).Some());
}
}
return(none <(int, string, Lambda)>());
}