private void HandleInitial(CmsCodeGenerator generator)
{
if (generator.Token.IsIdentifier())
{
ExpressionStatmentState = CmsCodeExpressionStatmentState.Adress;
}
else if (generator.Token.IsNumber())
{
ExpressionStatmentState = CmsCodeExpressionStatmentState.Number;
}
else if (generator.Token is EqualToken)
{
ExpressionStatmentState = CmsCodeExpressionStatmentState.EqualsThen;
}
else if (generator.Token is NotEqualToken)
{
ExpressionStatmentState = CmsCodeExpressionStatmentState.NotEqualsThen;
}
else if (generator.Token is GreatToken)
{
ExpressionStatmentState = CmsCodeExpressionStatmentState.GreatThen;
}
else if (generator.Token is LessToken)
{
ExpressionStatmentState = CmsCodeExpressionStatmentState.LessThen;
}
else if (generator.Token is GreatOrEqualToken)
{
ExpressionStatmentState = CmsCodeExpressionStatmentState.GreatEqualThen;
}
else if (generator.Token is LessOrEqualToken)
{
ExpressionStatmentState = CmsCodeExpressionStatmentState.LessEqualThen;
}
else if (generator.Token is PlusToken)
{
ExpressionStatmentState = CmsCodeExpressionStatmentState.Plus;
}
else if (generator.Token is SubToken)
{
ExpressionStatmentState = CmsCodeExpressionStatmentState.Sub;
}
//else if (generator.Token is Token)
// ExpressionStatmentState = CmsCodeExpressionStatmentState.Plus;
else
{
generator.MoveNextToken();
}
}
public void Handler(CmsCodeGenerator generator)
{
try
{
CmsCode compReference = null;
ExpressionStatmentState = CmsCodeExpressionStatmentState.Initial;
generator.MoveNextToken();
while (!(generator.Token is ThenToken || generator.Token is DoToken || generator.Token is SemiColonToken || generator.Token is EndToken))
{
switch (ExpressionStatmentState)
{
case CmsCodeExpressionStatmentState.Initial:
HandleInitial(generator);
break;
case CmsCodeExpressionStatmentState.Adress:
generator.AddCode(CmsCodeFactory.LOD(generator.VariableArea[generator.Token.Value]));
if (compReference != null)
{
generator.AddCode(compReference);
}
GoToInitialIfState(generator);
break;
case CmsCodeExpressionStatmentState.Number:
generator.AddCode(CmsCodeFactory.LDI(new CmsCode(int.Parse(generator.Token.Value))));
if (compReference != null)
{
generator.AddCode(compReference);
}
GoToInitialIfState(generator);
break;
case CmsCodeExpressionStatmentState.GreatThen:
compReference = CmsCodeFactory.GT;
GoToInitialIfState(generator);
break;
case CmsCodeExpressionStatmentState.LessThen:
compReference = CmsCodeFactory.LT;
GoToInitialIfState(generator);
break;
case CmsCodeExpressionStatmentState.EqualsThen:
compReference = CmsCodeFactory.EQ;
GoToInitialIfState(generator);
break;
case CmsCodeExpressionStatmentState.GreatEqualThen:
compReference = CmsCodeFactory.GE;
GoToInitialIfState(generator);
break;
case CmsCodeExpressionStatmentState.LessEqualThen:
compReference = CmsCodeFactory.LE;
GoToInitialIfState(generator);
break;
case CmsCodeExpressionStatmentState.NotEqualsThen:
compReference = CmsCodeFactory.NE;
GoToInitialIfState(generator);
break;
case CmsCodeExpressionStatmentState.Plus:
generator.MoveNextToken();
generator.AddCode(CmsCodeFactory.ADI(new CmsCode(int.Parse(generator.Token.Value))));
GoToInitialIfState(generator);
break;
case CmsCodeExpressionStatmentState.Sub:
compReference = CmsCodeFactory.SUI;
GoToInitialIfState(generator);
break;
default:
throw new ArgumentOutOfRangeException();
}
}
}
catch (Exception e)
{
throw new Exception($"Token: {generator.Token}\nTokenStack: {generator.Stack}\nError: {e.Message}", e);
}
}
private void GoToInitialIfState(CmsCodeGenerator generator)
{
generator.MoveNextToken();
ExpressionStatmentState = CmsCodeExpressionStatmentState.Initial;
}
