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; }