//TODO TESTS
private static FunctionNode FuncExecute(ListController <TokenModel> lc)
{
var name = lc.GetNext();
CheckEqual(TryGetNext(lc, "( expected"), "(", "( expected");
var funcs = (List <FuncModel>)FuncTable.Funcs.Where(model => model.Name == name.Text);
var args = new List <VarModel>();
var flag = true;
var checkNext = TryGetNext(lc, ") or variable expected");
if (checkNext.Text == ")")
{
flag = false;
lc.SetBack();
}
while (flag)
{
var next = TryGetNext(lc, ") or variable expected");
if (VarTable.Contains(next.Text))
{
args.Add(VarTable.Get(next.Text));
var afterVar = TryGetNext(lc, ") or , expected");
if (afterVar.Text == ",")
{
continue;
}
if (next.Text == ")")
{
lc.SetBack();
break;
}
}
throw new ParseException($"Unexpected token {next.Text}", next);
}
var closingNest = lc.GetNext();
var suitableFunc = funcs.FirstOrDefault(model => model.ArgsType.Count == args.Count);
if (suitableFunc == null)
{
throw new ParseException($"Cannot invoke function {name.Text} with {args.Count} arguments", name);
}
return(new FunctionNode {
FuncName = suitableFunc, Args = args
});
}
//TODO TESTS
private static void Command(ListController <TokenModel> lc)
{
var beg = lc.GetNext();
if (TypesTools.IsType(beg.Text))
{
lc.SetBack();
Initialization(lc);
}
else if (VarTable.Contains(beg.Text))
{
lc.SetBack();
var node = VariableAssign(lc);
Commands.Add(node);
}
else if (FuncTable.Contains(beg.Text))
{
lc.SetBack();
var node = FuncExecute(lc);
Commands.Add(node);
}
else
{
throw new ParseException($"Cannot resolve '{beg.Text}'", beg);
}
//todo lately var = Arithmetic Expression
//todo more lately type func
}
//TODO TESTS
private static void Initialization(ListController <TokenModel> lc)
{
var type = lc.GetNext();
var name = TryGetNext(lc, "Variable name expected");
if (!Constants.Alphabet.Contains(name.Text[0]))
{
throw new ParseException("Unexpected token", name);
}
if (VarTable.Contains(name.Text) || FuncTable.Contains(name.Text))
{
throw new ParseException("Member with the same name is already declared", name);
}
VarTable.Add(name.Text, type.Text);
}
//TODO TESTS
private static AssingNode VariableAssign(ListController <TokenModel> lc)
{
var variableToken = lc.GetNext();
CheckEqual(TryGetNext(lc, "= expected"), "=", "= expected");
var func = TryGetNext(lc, "Expression expected");
var res = new AssingNode();
var variable = VarTable.Get(variableToken.Text);
res.Left = variable;
if (FuncTable.Contains(func.Text))
{
lc.SetBack();
var fn = FuncExecute(lc);
res.Right = fn;
}
else
{
throw new ParseException("Function expected", func);
}
return(res);
}
