public BoolExpr(BoolToken token, IEnv env)
: base(env)
{
if (token == null)
{
throw new ArgumentNullException(nameof(token));
}
base.Token = token;
}
private bool ShouldUnstack(BoolToken boolToken, Token topOperator)
{
if (topOperator == null ||
topOperator is TargetToken ||
topOperator is OpenParenthesisToken
)
{
return(false);
}
if (!(topOperator is BoolToken))
{
throw new LexingException("Somehow an invalid Token type ended up on the operators stack. Good job Connor.");
}
// Not bothering with an actual precedence as there are only two operators
return(!(boolToken.value == BoolToken.Type.AND && (topOperator as BoolToken).value == BoolToken.Type.OR));
}
}//Done
protected ValueToken CompareOps()
{
ValueToken left = PlusMinusOps();
while ((CurrentToken.GetTokenType == TokenType.MORE) || (CurrentToken.GetTokenType == TokenType.LESS) || (CurrentToken.GetTokenType == TokenType.EQUAL_BOOL) || (CurrentToken.GetTokenType == TokenType.NOT_EQUAL))
{
if (CurrentToken.GetTokenType == TokenType.MORE)
{
Eat(TokenType.MORE);
ValueToken right = PlusMinusOps();
if (left is IntegerToken)
{
if (right is IntegerToken)
{
left = new BoolToken((left as IntegerToken) > (right as IntegerToken));
}
else if (right is DoubleToken)
{
left = new BoolToken((left as IntegerToken) > (right as DoubleToken));
}
else if (right is CharToken)
{
left = new BoolToken((left as IntegerToken) > (right as CharToken));//!!!!!!!!!!!!!!!!!
}
else
{
Error("Error in CompareExpr: wrong value type");
}
}
else if (left is DoubleToken)
{
if (right is IntegerToken)
{
left = new BoolToken((left as DoubleToken) > (right as IntegerToken));
}
else if (right is DoubleToken)
{
left = new BoolToken((left as DoubleToken) > (right as DoubleToken));
}
else
{
Error("Error in CompareExpr: wrong value type");
}
}
else if (left is CharToken)
{
if (right is CharToken)
{
left = new BoolToken((left as CharToken) > (right as CharToken));
}
else if (right is IntegerToken)
{
left = new BoolToken((left as CharToken) > (right as IntegerToken));
}
else
{
Error("Error in CompareExpr: wrong value type");
}
}
else
{
Error("Error in CompareExpr: wrong value type");
}
}
else if (CurrentToken.GetTokenType == TokenType.LESS)
{
Eat(TokenType.LESS);
ValueToken right = PlusMinusOps();
if (left is IntegerToken)
{
if (right is IntegerToken)
{
left = new BoolToken((left as IntegerToken) < (right as IntegerToken));
}
else if (right is DoubleToken)
{
left = new BoolToken((left as IntegerToken) < (right as DoubleToken));
}
else if (right is CharToken)
{
left = new BoolToken((left as IntegerToken) < (right as CharToken));
}
else
{
Error("Error in CompareExpr: wrong value type");
}
}
else if (left is DoubleToken)
{
if (right is IntegerToken)
{
left = new BoolToken((left as DoubleToken) < (right as IntegerToken));
}
else if (right is DoubleToken)
{
left = new BoolToken((left as DoubleToken) < (right as DoubleToken));
}
else
{
Error("Error in CompareExpr: wrong value type");
}
}
else if (left is CharToken)
{
if (right is CharToken)
{
left = new BoolToken((left as CharToken) > (right as CharToken));
}
else if (right is IntegerToken)
{
left = new BoolToken((left as CharToken) > (right as IntegerToken));
}
else
{
Error("Error in CompareExpr: wrong value type");
}
}
else
{
Error("Error in CompareExpr: wrong value type");
}
}
else if (CurrentToken.GetTokenType == TokenType.EQUAL_BOOL)
{
Eat(TokenType.EQUAL_BOOL);
ValueToken right = PlusMinusOps();
if (left is IntegerToken)
{
if (right is IntegerToken)
{
left = new BoolToken((left as IntegerToken) == (right as IntegerToken));
}
else if (right is DoubleToken)
{
left = new BoolToken((left as IntegerToken) == (right as DoubleToken));
}
else if (right is CharToken)
{
left = new BoolToken((left as IntegerToken) == (right as CharToken));
}
else
{
Error("Error in CompareExpr: wrong value type");
}
}
else if (left is DoubleToken)
{
if (right is IntegerToken)
{
left = new BoolToken((left as DoubleToken) == (right as IntegerToken));
}
else if (right is DoubleToken)
{
left = new BoolToken((left as DoubleToken) == (right as DoubleToken));
}
else
{
Error("Error in CompareExpr: wrong value type");
}
}
else if (left is CharToken)
{
if (right is CharToken)
{
left = new BoolToken((left as CharToken) == (right as CharToken));
}
else if (right is IntegerToken)
{
left = new BoolToken((left as CharToken) == (right as IntegerToken));
}
else
{
Error("Error in CompareExpr: wrong value type");
}
}
else if (left is BoolToken)
{
if (right is BoolToken)
{
left = new BoolToken((left as BoolToken) == (right as BoolToken));
}
else
{
Error("Error in CompareExpr: wrong value type");
}
}
else if (left is StringToken)
{
if (right is StringToken)
{
left = new BoolToken((left as StringToken) == (right as StringToken));
}
}
}
else if (CurrentToken.GetTokenType == TokenType.NOT_EQUAL)
{
Eat(TokenType.NOT_EQUAL);
ValueToken right = PlusMinusOps();
if (left is IntegerToken)
{
if (right is IntegerToken)
{
left = new BoolToken((left as IntegerToken) != (right as IntegerToken));
}
else if (right is DoubleToken)
{
left = new BoolToken((left as IntegerToken) != (right as DoubleToken));
}
else if (right is CharToken)
{
left = new BoolToken((left as IntegerToken) != (right as CharToken));
}
else
{
Error("Error in CompareExpr: wrong value type");
}
}
else if (left is DoubleToken)
{
if (right is IntegerToken)
{
left = new BoolToken((left as DoubleToken) != (right as IntegerToken));
}
else if (right is DoubleToken)
{
left = new BoolToken((left as DoubleToken) != (right as DoubleToken));
}
else
{
Error("Error in CompareExpr: wrong value type");
}
}
else if (left is CharToken)
{
if (right is CharToken)
{
left = new BoolToken((left as CharToken) != (right as CharToken));
}
else if (right is IntegerToken)
{
left = new BoolToken((left as CharToken) != (right as IntegerToken));
}
else
{
Error("Error in CompareExpr: wrong value type");
}
}
else if (left is BoolToken)
{
if (right is BoolToken)
{
left = new BoolToken((left as BoolToken) != (right as BoolToken));
}
else
{
Error("Error in CompareExpr: wrong value type");
}
}
else if (left is StringToken)
{
if (right is StringToken)
{
left = new BoolToken((left as StringToken) != (right as StringToken));
}
}
}
}
return(left);
}//Done
public BoolExpression(BoolToken boolToken, ExpressionNode lhs, ExpressionNode rhs)
{
this.boolToken = boolToken;
this.lhs = lhs;
this.rhs = rhs;
}
public BoolAST(BoolToken token)
{
ReferenceToken = token;
Bool = (bool)token.Value;
}
public ConstantBoolExpressionToken(BoolToken token)
: base(token.StringValue)
{
Token = token ?? throw new ArgumentNullException(nameof(token));
}