private static object SubtractTypes(long leftValueType, long rightValueType, object leftValue, object rightValue)
{
if (leftValueType == LexemeType.NUMBER && rightValueType == LexemeType.NUMBER)
{
var literalSum = new Expression.LexemeTypeLiteral();
literalSum.literal = Convert.ToInt32(leftValue) - Convert.ToInt32(rightValue);
literalSum.lexemeType = LexemeType.NUMBER;
return(literalSum);
}
if (leftValueType == LexemeType.STRING && rightValueType == LexemeType.STRING)
{
throw new ArgumentException("can't subtract strings");
}
throw new ArgumentNullException("can't subtract types");
}
private static object MultiplyTypes(long leftValueType, long rightValueType, object leftValue, object rightValue)
{
if (leftValueType == LexemeType.NUMBER && rightValueType == LexemeType.NUMBER)
{
var literalProduction = new Expression.LexemeTypeLiteral();
literalProduction.literal = Convert.ToInt32(leftValue) * Convert.ToInt32(rightValue);
literalProduction.lexemeType = LexemeType.NUMBER;
return(literalProduction);
}
if (leftValueType == LexemeType.STRING && rightValueType == LexemeType.STRING)
{
throw new ArgumentException("can't multiply strings");
}
throw new ArgumentNullException("can't multiply types");
}
private static object IsLessThan(long leftValueType, long rightValueType, object leftValue, object rightValue)
{
if (leftValueType == LexemeType.NUMBER && rightValueType == LexemeType.NUMBER)
{
var literal = new Expression.LexemeTypeLiteral();
literal.literal = Convert.ToInt32(leftValue) < Convert.ToInt32(rightValue);
literal.lexemeType = LexemeType.BOOL;
return(literal);
}
if (leftValueType == LexemeType.STRING || rightValueType == LexemeType.STRING)
{
throw new ArgumentException("can't apply less than operator to strings");
}
throw new ArgumentException("Can't compare types");
}
private static object DivideTypes(long leftValueType, long rightValueType, object leftValue, object rightValue)
{
if (leftValueType == LexemeType.NUMBER && rightValueType == LexemeType.NUMBER)
{
var literalProduction = new Expression.LexemeTypeLiteral();
int divisor = Convert.ToInt32(leftValue);
int divident = Convert.ToInt32(rightValue);
if (divisor == 0 || divident == 0)
{
throw new ArgumentException("Can't divide by zero");
}
literalProduction.literal = Convert.ToInt32(leftValue) / Convert.ToInt32(rightValue);
literalProduction.lexemeType = LexemeType.NUMBER;
return(literalProduction);
}
if (leftValueType == LexemeType.STRING && rightValueType == LexemeType.STRING)
{
throw new ArgumentException("can't divide strings");
}
throw new ArgumentNullException("can't divide types");
}
