private IExpression MultiplicativeExpression()
{
IExpression expr = UnaryExpression();
while (!lexer.Peek(TokenType.None))
{
Operator op;
if (lexer.Accept(TokenType.Mult))
{
op = Operator.Mult;
}
else if (lexer.Accept(TokenType.Div))
{
op = Operator.Div;
}
else if (lexer.Accept(TokenType.Mod))
{
op = Operator.Mod;
}
else
{
break;
}
expr = new NumericArithmeticExpression
{
Operator = op,
LeftExpr = (INumericExpression)expr,
RightExpr = (INumericExpression)UnaryExpression()
};
}
return(expr);
}
private IExpression AdditiveExpression()
{
IExpression expr = MultiplicativeExpression();
while (!lexer.Peek(TokenType.None))
{
Operator op;
if (lexer.Accept(TokenType.Plus))
{
op = Operator.Plus;
}
else if (lexer.Accept(TokenType.Minus))
{
op = Operator.Minus;
}
else
{
break;
}
expr = new NumericArithmeticExpression
{
Operator = op,
LeftExpr = (INumericExpression)expr,
RightExpr = (INumericExpression)MultiplicativeExpression()
};
}
return(expr);
}
private IExpression ShiftExpression()
{
IExpression expr = AdditiveExpression();
while (!lexer.Peek(TokenType.None))
{
Operator op;
if (lexer.Accept(TokenType.LeftShift))
{
op = Operator.LeftShift;
}
else if (lexer.Accept(TokenType.RightShift))
{
op = Operator.RightShift;
}
else
{
break;
}
expr = new NumericArithmeticExpression
{
Operator = op,
LeftExpr = (INumericExpression)expr,
RightExpr = (INumericExpression)AdditiveExpression()
};
}
return(expr);
}
private IExpression BitwiseAndExpression()
{
IExpression expr = EqualityExpression();
while (lexer.Accept(TokenType.BitwiseAnd))
{
expr = new NumericArithmeticExpression
{
Operator = Operator.BitwiseAnd,
LeftExpr = (INumericExpression)expr,
RightExpr = (INumericExpression)EqualityExpression()
};
}
return(expr);
}
private IExpression BitwiseOrExpression()
{
IExpression expr = BitwiseXorExpression();
while (lexer.Accept(TokenType.BitwiseOr))
{
expr = new NumericArithmeticExpression
{
Operator = Operator.BitwiseOr,
LeftExpr = (INumericExpression)expr,
RightExpr = (INumericExpression)BitwiseXorExpression()
};
}
return(expr);
}