public override ValueExpression Evaluate(IParserContext context)
{
ValueExpression[] values = new[] { Left.Evaluate(context), Right.Evaluate(context) };
Type type1 = values[0].Type;
Type type2 = values[1].Type;
bool nullable1 = type1.IsGenericType && type1.GetGenericTypeDefinition() == typeof(Nullable <>);
bool nullable2 = type2.IsGenericType && type2.GetGenericTypeDefinition() == typeof(Nullable <>);
type1 = Nullable.GetUnderlyingType(type1) ?? type1;
type2 = Nullable.GetUnderlyingType(type2) ?? type2;
bool isNullable = (nullable1 || nullable2);
OperatorMethod operatorMethod = FindOperatorMethod(type1, type2);
if (operatorMethod == null)
{
Type promotionType = null;
if (type1 == typeof(decimal) || type2 == typeof(decimal))
{
promotionType = typeof(decimal);
}
else if (type1 == typeof(double) || type2 == typeof(double))
{
promotionType = typeof(double);
}
else if (type1 == typeof(float) || type2 == typeof(float))
{
promotionType = typeof(float);
}
else if (type1 == typeof(ulong) || type2 == typeof(ulong))
{
promotionType = typeof(ulong);
}
else if (type1 == typeof(long) || type2 == typeof(long))
{
promotionType = typeof(long);
}
else if (type1 == typeof(uint) || type2 == typeof(uint) && (type1 == typeof(sbyte) || type2 == typeof(sbyte) || type1 == typeof(short) || type2 == typeof(short) || type1 == typeof(int) || type2 == typeof(int)))
{
promotionType = typeof(long);
}
else if (type1 == typeof(uint) || type2 == typeof(uint))
{
promotionType = typeof(uint);
}
else if (type1.IsPrimitive && type2.IsPrimitive && type1 != typeof(bool) && type2 != typeof(bool))
{
promotionType = typeof(int);
}
if (promotionType != null)
{
type1 = promotionType;
type2 = promotionType;
}
operatorMethod = FindOperatorMethod(type1, type2);
}
if (operatorMethod == null)
{
MethodInfo customOperatorMethod = type1.GetMethod(_operatorOverloadNames[_operator], new[] { type1, type2 });
if (customOperatorMethod != null)
{
return(new ValueExpression(TokenPosition, customOperatorMethod.Invoke(null, new[] { values[0].Value, values[1].Value }), customOperatorMethod.ReturnType));
}
if (_operator == "==" || _operator == "!=")
{
return(new ValueExpression(TokenPosition, BinaryExpressionHelper.CalcObject(_operator, values[0].Value, values[1].Value, context.StringComparison, this), typeof(bool)));
}
throw new IllegalOperandsException("Operator " + _operator + " is not supported on " + values[0] + " and " + values[1], this);
}
Type returnType = operatorMethod.ReturnType;
if (isNullable)
{
returnType = typeof(Nullable <>).MakeGenericType(returnType);
//TODO: check specs for bool? values
if (values[0].Value == null || values[1].Value == null)
{
return(new ValueExpression(TokenPosition, null, returnType));
}
}
object value1 = Convert.ChangeType(values[0].Value, operatorMethod.Type1);
object value2 = Convert.ChangeType(values[1].Value, operatorMethod.Type2);
return(new ValueExpression(TokenPosition, operatorMethod.Function(_operator, value1, value2, context.StringComparison, this), returnType));
}
public override ValueExpression Evaluate(ITemplateContext context)
{
ValueExpression[] values = new ValueExpression[] { Left.Evaluate(context), Right.Evaluate(context) };
Type type1 = values[0].Type;
Type type2 = values[1].Type;
bool nullable1 = type1.IsGenericType && type1.GetGenericTypeDefinition() == typeof(Nullable <>);
bool nullable2 = type2.IsGenericType && type2.GetGenericTypeDefinition() == typeof(Nullable <>);
type1 = Nullable.GetUnderlyingType(type1) ?? type1;
type2 = Nullable.GetUnderlyingType(type2) ?? type2;
bool isNullable = (nullable1 || nullable2);
OperatorMethod operatorMethod = FindOperatorMethod(type1, type2);
if (operatorMethod == null)
{
Type promotionType = null;
if (type1 == typeof(decimal) || type2 == typeof(decimal))
{
promotionType = typeof(decimal);
}
else if (type1 == typeof(double) || type2 == typeof(double))
{
promotionType = typeof(double);
}
else if (type1 == typeof(float) || type2 == typeof(float))
{
promotionType = typeof(float);
}
else if (type1 == typeof(ulong) || type2 == typeof(ulong))
{
promotionType = typeof(ulong);
}
else if (type1 == typeof(long) || type2 == typeof(long))
{
promotionType = typeof(long);
}
else if (type1 == typeof(uint) || type2 == typeof(uint) && (type1 == typeof(sbyte) || type2 == typeof(sbyte) || type1 == typeof(short) || type2 == typeof(short) || type1 == typeof(int) || type2 == typeof(int)))
{
promotionType = typeof(long);
}
else if (type1 == typeof(uint) || type2 == typeof(uint))
{
promotionType = typeof(uint);
}
else if (type1.IsPrimitive && type2.IsPrimitive && type1 != typeof(bool) && type2 != typeof(bool))
{
promotionType = typeof(int);
}
if (promotionType != null)
{
type1 = promotionType;
type2 = promotionType;
}
operatorMethod = FindOperatorMethod(type1, type2);
}
if (operatorMethod == null)
{
if (_operator == "==" || _operator == "!=")
{
return(new ValueExpression(BEH.CalcObject(_operator, values[0].Value, values[1].Value), typeof(bool)));
}
throw new ArithmeticException();
}
Type returnType = operatorMethod.ReturnType;
if (isNullable)
{
returnType = typeof(Nullable <>).MakeGenericType(returnType);
//TODO: check specs for bool? values
if (values[0].Value == null || values[1].Value == null)
{
return(new ValueExpression(null, returnType));
}
}
object value1 = Convert.ChangeType(values[0].Value, operatorMethod.Type1);
object value2 = Convert.ChangeType(values[1].Value, operatorMethod.Type2);
return(new ValueExpression(operatorMethod.Function(_operator, value1, value2), returnType));
}