[SuppressMessage("Microsoft.Performance", "CA1800:DoNotCastUnnecessarily")] // bogus since the casts are in different case statements
internal static MethodInfo MapOperatorToMethod(
CodeBinaryOperatorType op,
Type lhs,
CodeExpression lhsExpression,
Type rhs,
CodeExpression rhsExpression,
RuleValidation validator,
out ValidationError error)
{
// determine what the method name should be
string methodName;
string message;
OperatorGrouping group;
switch (op)
{
case CodeBinaryOperatorType.ValueEquality:
methodName = "op_Equality";
group = OperatorGrouping.Equality;
break;
case CodeBinaryOperatorType.GreaterThan:
methodName = "op_GreaterThan";
group = OperatorGrouping.Relational;
break;
case CodeBinaryOperatorType.GreaterThanOrEqual:
methodName = "op_GreaterThanOrEqual";
group = OperatorGrouping.Relational;
break;
case CodeBinaryOperatorType.LessThan:
methodName = "op_LessThan";
group = OperatorGrouping.Relational;
break;
case CodeBinaryOperatorType.LessThanOrEqual:
methodName = "op_LessThanOrEqual";
group = OperatorGrouping.Relational;
break;
case CodeBinaryOperatorType.Add:
methodName = "op_Addition";
group = OperatorGrouping.Arithmetic;
break;
case CodeBinaryOperatorType.Subtract:
methodName = "op_Subtraction";
group = OperatorGrouping.Arithmetic;
break;
case CodeBinaryOperatorType.Multiply:
methodName = "op_Multiply";
group = OperatorGrouping.Arithmetic;
break;
case CodeBinaryOperatorType.Divide:
methodName = "op_Division";
group = OperatorGrouping.Arithmetic;
break;
case CodeBinaryOperatorType.Modulus:
methodName = "op_Modulus";
group = OperatorGrouping.Arithmetic;
break;
case CodeBinaryOperatorType.BitwiseAnd:
methodName = "op_BitwiseAnd";
group = OperatorGrouping.Arithmetic;
break;
case CodeBinaryOperatorType.BitwiseOr:
methodName = "op_BitwiseOr";
group = OperatorGrouping.Arithmetic;
break;
default:
Debug.Assert(false, "Operator " + op.ToString() + " not implemented");
message = string.Format(CultureInfo.CurrentCulture, Messages.BinaryOpNotSupported, op.ToString());
error = new ValidationError(message, ErrorNumbers.Error_CodeExpressionNotHandled);
return null;
}
// NOTE: types maybe NullLiteral, which signifies the constant "null"
List<MethodInfo> candidates = new List<MethodInfo>();
bool lhsNullable = ConditionHelper.IsNullableValueType(lhs);
bool rhsNullable = ConditionHelper.IsNullableValueType(rhs);
Type lhsType0 = (lhsNullable) ? Nullable.GetUnderlyingType(lhs) : lhs;
Type rhsType0 = (rhsNullable) ? Nullable.GetUnderlyingType(rhs) : rhs;
// special cases for enums
if (lhsType0.IsEnum)
{
// only 3 cases (U = underlying type of E):
// E = E + U
// U = E - E
// E = E - U
// plus the standard comparisons (E == E, E > E, etc.)
// need to also allow E == 0
Type underlyingType;
switch (op)
{
case CodeBinaryOperatorType.Add:
underlyingType = EnumHelper.GetUnderlyingType(lhsType0);
if ((underlyingType != null) &&
(RuleValidation.TypesAreAssignable(rhsType0, underlyingType, rhsExpression, out error)))
{
error = null;
return new EnumOperationMethodInfo(lhs, op, rhs, false);
}
break;
case CodeBinaryOperatorType.Subtract:
underlyingType = EnumHelper.GetUnderlyingType(lhsType0);
if (underlyingType != null)
{
if (lhsType0 == rhsType0)
{
// E - E
error = null;
return new EnumOperationMethodInfo(lhs, op, rhs, false);
}
else if (DecimalIntegerLiteralZero(rhs, rhsExpression as CodePrimitiveExpression))
{
// E - 0, can convert 0 to E
error = null;
return new EnumOperationMethodInfo(lhs, op, rhs, true);
}
else if (RuleValidation.TypesAreAssignable(rhsType0, underlyingType, rhsExpression, out error))
{
// expression not passed to TypesAreAssignable, so not looking for constants (since 0 is all we care about)
error = null;
return new EnumOperationMethodInfo(lhs, op, rhs, false);
}
}
break;
case CodeBinaryOperatorType.ValueEquality:
case CodeBinaryOperatorType.LessThan:
case CodeBinaryOperatorType.LessThanOrEqual:
case CodeBinaryOperatorType.GreaterThan:
case CodeBinaryOperatorType.GreaterThanOrEqual:
if (lhsType0 == rhsType0)
{
error = null;
return new EnumOperationMethodInfo(lhs, op, rhs, false);
}
else if (lhsNullable && (rhs == typeof(NullLiteral)))
{
// handle enum? op null
// treat the rhs as the same nullable enum
error = null;
return new EnumOperationMethodInfo(lhs, op, lhs, false);
}
else if (DecimalIntegerLiteralZero(rhs, rhsExpression as CodePrimitiveExpression))
{
error = null;
return new EnumOperationMethodInfo(lhs, op, rhs, true);
}
break;
}
// can't do it, sorry
// but check if there is a user-defined operator that works
}
else if (rhsType0.IsEnum)
{
// lhs != enum, so only 2 cases (U = underlying type of E):
// E = U + E
// E = U - E
// comparisons are E == E, etc., so if the lhs is not an enum, too bad
// although we need to check for 0 == E
Type underlyingType;
switch (op)
{
case CodeBinaryOperatorType.Add:
underlyingType = EnumHelper.GetUnderlyingType(rhsType0);
if ((underlyingType != null) &&
(RuleValidation.TypesAreAssignable(lhsType0, underlyingType, lhsExpression, out error)))
{
error = null;
return new EnumOperationMethodInfo(lhs, op, rhs, false);
}
break;
case CodeBinaryOperatorType.Subtract:
underlyingType = EnumHelper.GetUnderlyingType(rhsType0);
if (underlyingType != null)
{
CodePrimitiveExpression primitive = lhsExpression as CodePrimitiveExpression;
if (DecimalIntegerLiteralZero(lhs, primitive))
{
// 0 - E, can convert 0 to E
error = null;
return new EnumOperationMethodInfo(lhs, op, rhs, true);
}
else if (RuleValidation.TypesAreAssignable(lhsType0, underlyingType, lhsExpression, out error))
{
// expression not passed to TypesAreAssignable, so not looking for constants (since 0 is all we care about)
error = null;
return new EnumOperationMethodInfo(lhs, op, rhs, false);
}
}
break;
case CodeBinaryOperatorType.ValueEquality:
case CodeBinaryOperatorType.LessThan:
case CodeBinaryOperatorType.LessThanOrEqual:
case CodeBinaryOperatorType.GreaterThan:
case CodeBinaryOperatorType.GreaterThanOrEqual:
if (rhsNullable && (lhs == typeof(NullLiteral)))
{
// handle null op enum?
// treat the lhs as the same nullable enum type
error = null;
return new EnumOperationMethodInfo(rhs, op, rhs, false);
}
else if (DecimalIntegerLiteralZero(lhs, lhsExpression as CodePrimitiveExpression))
{
error = null;
return new EnumOperationMethodInfo(lhs, op, rhs, true);
}
break;
}
// can't do it, sorry
// but check if there is a user-defined operator that works
}
// enum specific operations already handled, see if one side (or both) define operators
AddOperatorOverloads(lhsType0, methodName, lhs, rhs, candidates);
AddOperatorOverloads(rhsType0, methodName, lhs, rhs, candidates);
if (lhsNullable || rhsNullable || (lhs == typeof(NullLiteral)) || (rhs == typeof(NullLiteral)))
{
// need to add in lifted methods
AddLiftedOperators(lhsType0, methodName, group, lhsType0, rhsType0, candidates);
AddLiftedOperators(rhsType0, methodName, group, lhsType0, rhsType0, candidates);
}
if (candidates.Count == 0)
{
// no overrides, so get the default list
methodName = methodName.Substring(3); // strip off the op_
foreach (MethodInfo mi in typeof(DefaultOperators).GetMethods())
{
if (mi.Name == methodName)
{
ParameterInfo[] parameters = mi.GetParameters();
Type parm1 = parameters[0].ParameterType;
Type parm2 = parameters[1].ParameterType;
if (RuleValidation.ImplicitConversion(lhs, parm1) &&
RuleValidation.ImplicitConversion(rhs, parm2))
{
candidates.Add(mi);
}
}
}
// if no candidates and ==, can we use object == object?
if ((candidates.Count == 0) && ("Equality" == methodName))
{
// C# 7.9.6
// references must be compatible
// no boxing
// value types can't be compared
if ((!lhs.IsValueType) && (!rhs.IsValueType))
{
// they are not classes, so references need to be compatible
// also check for null (which is NullLiteral type) -- null is compatible with any object type
if ((lhs == typeof(NullLiteral)) || (rhs == typeof(NullLiteral)) ||
(lhs.IsAssignableFrom(rhs)) || (rhs.IsAssignableFrom(lhs)))
{
candidates.Add(ObjectEquality);
}
}
}
// if no candidates and nullable, add lifted operators
if ((candidates.Count == 0) && ((lhsNullable || rhsNullable || (lhs == typeof(NullLiteral)) || (rhs == typeof(NullLiteral)))))
{
foreach (MethodInfo mi in typeof(DefaultOperators).GetMethods())
{
if (mi.Name == methodName)
{
ParameterInfo[] parameters = mi.GetParameters();
MethodInfo liftedMethod = EvaluateLiftedMethod(mi, parameters, group, lhsType0, rhsType0);
if (liftedMethod != null)
candidates.Add(liftedMethod);
}
}
}
}
if (candidates.Count == 1)
{
// only 1, so it is it
error = null;
return candidates[0];
}
else if (candidates.Count == 0)
{
// nothing matched
message = string.Format(CultureInfo.CurrentCulture,
(group == OperatorGrouping.Arithmetic) ? Messages.ArithOpBadTypes : Messages.RelationalOpBadTypes,
op.ToString(),
(lhs == typeof(NullLiteral)) ? Messages.NullValue : RuleDecompiler.DecompileType(lhs),
(rhs == typeof(NullLiteral)) ? Messages.NullValue : RuleDecompiler.DecompileType(rhs));
error = new ValidationError(message, ErrorNumbers.Error_OperandTypesIncompatible);
return null;
}
else
{
// more than 1, so pick the best one
MethodInfo bestFit = validator.FindBestCandidate(null, candidates, lhs, rhs);
if (bestFit != null)
{
error = null;
return bestFit;
}
// must be ambiguous. Since there are at least 2 choices, show only the first 2
message = string.Format(CultureInfo.CurrentCulture,
Messages.AmbiguousOperator,
op.ToString(),
RuleDecompiler.DecompileMethod(candidates[0]),
RuleDecompiler.DecompileMethod(candidates[1]));
error = new ValidationError(message, ErrorNumbers.Error_OperandTypesIncompatible);
return null;
}
}
internal static MethodInfo MapOperatorToMethod(CodeBinaryOperatorType op, Type lhs, CodeExpression lhsExpression, Type rhs, CodeExpression rhsExpression, RuleValidation validator, out ValidationError error)
{
string str;
string str2;
OperatorGrouping arithmetic;
switch (op)
{
case CodeBinaryOperatorType.Add:
str = "op_Addition";
arithmetic = OperatorGrouping.Arithmetic;
break;
case CodeBinaryOperatorType.Subtract:
str = "op_Subtraction";
arithmetic = OperatorGrouping.Arithmetic;
break;
case CodeBinaryOperatorType.Multiply:
str = "op_Multiply";
arithmetic = OperatorGrouping.Arithmetic;
break;
case CodeBinaryOperatorType.Divide:
str = "op_Division";
arithmetic = OperatorGrouping.Arithmetic;
break;
case CodeBinaryOperatorType.Modulus:
str = "op_Modulus";
arithmetic = OperatorGrouping.Arithmetic;
break;
case CodeBinaryOperatorType.ValueEquality:
str = "op_Equality";
arithmetic = OperatorGrouping.Equality;
break;
case CodeBinaryOperatorType.BitwiseOr:
str = "op_BitwiseOr";
arithmetic = OperatorGrouping.Arithmetic;
break;
case CodeBinaryOperatorType.BitwiseAnd:
str = "op_BitwiseAnd";
arithmetic = OperatorGrouping.Arithmetic;
break;
case CodeBinaryOperatorType.LessThan:
str = "op_LessThan";
arithmetic = OperatorGrouping.Relational;
break;
case CodeBinaryOperatorType.LessThanOrEqual:
str = "op_LessThanOrEqual";
arithmetic = OperatorGrouping.Relational;
break;
case CodeBinaryOperatorType.GreaterThan:
str = "op_GreaterThan";
arithmetic = OperatorGrouping.Relational;
break;
case CodeBinaryOperatorType.GreaterThanOrEqual:
str = "op_GreaterThanOrEqual";
arithmetic = OperatorGrouping.Relational;
break;
default:
str2 = string.Format(CultureInfo.CurrentCulture, Messages.BinaryOpNotSupported, new object[] { op.ToString() });
error = new ValidationError(str2, 0x548);
return null;
}
List<MethodInfo> candidates = new List<MethodInfo>();
bool flag = ConditionHelper.IsNullableValueType(lhs);
bool flag2 = ConditionHelper.IsNullableValueType(rhs);
Type rhsType = flag ? Nullable.GetUnderlyingType(lhs) : lhs;
Type type = flag2 ? Nullable.GetUnderlyingType(rhs) : rhs;
if (!rhsType.IsEnum)
{
if (type.IsEnum)
{
Type underlyingType;
switch (op)
{
case CodeBinaryOperatorType.Add:
underlyingType = EnumHelper.GetUnderlyingType(type);
if ((underlyingType == null) || !RuleValidation.TypesAreAssignable(rhsType, underlyingType, lhsExpression, out error))
{
break;
}
error = null;
return new EnumOperationMethodInfo(lhs, op, rhs, false);
case CodeBinaryOperatorType.Subtract:
{
underlyingType = EnumHelper.GetUnderlyingType(type);
if (underlyingType == null)
{
break;
}
CodePrimitiveExpression expression = lhsExpression as CodePrimitiveExpression;
if (!DecimalIntegerLiteralZero(lhs, expression))
{
if (!RuleValidation.TypesAreAssignable(rhsType, underlyingType, lhsExpression, out error))
{
break;
}
error = null;
return new EnumOperationMethodInfo(lhs, op, rhs, false);
}
error = null;
return new EnumOperationMethodInfo(lhs, op, rhs, true);
}
case CodeBinaryOperatorType.ValueEquality:
case CodeBinaryOperatorType.LessThan:
case CodeBinaryOperatorType.LessThanOrEqual:
case CodeBinaryOperatorType.GreaterThan:
case CodeBinaryOperatorType.GreaterThanOrEqual:
if (!flag2 || !(lhs == typeof(NullLiteral)))
{
if (DecimalIntegerLiteralZero(lhs, lhsExpression as CodePrimitiveExpression))
{
error = null;
return new EnumOperationMethodInfo(lhs, op, rhs, true);
}
break;
}
error = null;
return new EnumOperationMethodInfo(rhs, op, rhs, false);
}
}
}
else
{
Type type3;
switch (op)
{
case CodeBinaryOperatorType.Add:
type3 = EnumHelper.GetUnderlyingType(rhsType);
if ((type3 == null) || !RuleValidation.TypesAreAssignable(type, type3, rhsExpression, out error))
{
break;
}
error = null;
return new EnumOperationMethodInfo(lhs, op, rhs, false);
case CodeBinaryOperatorType.Subtract:
type3 = EnumHelper.GetUnderlyingType(rhsType);
if (type3 == null)
{
break;
}
if (!(rhsType == type))
{
if (DecimalIntegerLiteralZero(rhs, rhsExpression as CodePrimitiveExpression))
{
error = null;
return new EnumOperationMethodInfo(lhs, op, rhs, true);
}
if (!RuleValidation.TypesAreAssignable(type, type3, rhsExpression, out error))
{
break;
}
error = null;
return new EnumOperationMethodInfo(lhs, op, rhs, false);
}
error = null;
return new EnumOperationMethodInfo(lhs, op, rhs, false);
case CodeBinaryOperatorType.ValueEquality:
case CodeBinaryOperatorType.LessThan:
case CodeBinaryOperatorType.LessThanOrEqual:
case CodeBinaryOperatorType.GreaterThan:
case CodeBinaryOperatorType.GreaterThanOrEqual:
if (!(rhsType == type))
{
if (flag && (rhs == typeof(NullLiteral)))
{
error = null;
return new EnumOperationMethodInfo(lhs, op, lhs, false);
}
if (!DecimalIntegerLiteralZero(rhs, rhsExpression as CodePrimitiveExpression))
{
break;
}
error = null;
return new EnumOperationMethodInfo(lhs, op, rhs, true);
}
error = null;
return new EnumOperationMethodInfo(lhs, op, rhs, false);
}
}
AddOperatorOverloads(rhsType, str, lhs, rhs, candidates);
AddOperatorOverloads(type, str, lhs, rhs, candidates);
if ((flag || flag2) || ((lhs == typeof(NullLiteral)) || (rhs == typeof(NullLiteral))))
{
AddLiftedOperators(rhsType, str, arithmetic, rhsType, type, candidates);
AddLiftedOperators(type, str, arithmetic, rhsType, type, candidates);
}
if (candidates.Count == 0)
{
str = str.Substring(3);
foreach (MethodInfo info in typeof(DefaultOperators).GetMethods())
{
if (info.Name == str)
{
ParameterInfo[] parameters = info.GetParameters();
Type parameterType = parameters[0].ParameterType;
Type toType = parameters[1].ParameterType;
if (RuleValidation.ImplicitConversion(lhs, parameterType) && RuleValidation.ImplicitConversion(rhs, toType))
{
candidates.Add(info);
}
}
}
if ((((candidates.Count == 0) && ("Equality" == str)) && (!lhs.IsValueType && !rhs.IsValueType)) && (((lhs == typeof(NullLiteral)) || (rhs == typeof(NullLiteral))) || (lhs.IsAssignableFrom(rhs) || rhs.IsAssignableFrom(lhs))))
{
candidates.Add(ObjectEquality);
}
if ((candidates.Count == 0) && ((flag || flag2) || ((lhs == typeof(NullLiteral)) || (rhs == typeof(NullLiteral)))))
{
foreach (MethodInfo info2 in typeof(DefaultOperators).GetMethods())
{
if (info2.Name == str)
{
ParameterInfo[] infoArray2 = info2.GetParameters();
MethodInfo item = EvaluateLiftedMethod(info2, infoArray2, arithmetic, rhsType, type);
if (item != null)
{
candidates.Add(item);
}
}
}
}
}
if (candidates.Count == 1)
{
error = null;
return candidates[0];
}
if (candidates.Count == 0)
{
str2 = string.Format(CultureInfo.CurrentCulture, (arithmetic == OperatorGrouping.Arithmetic) ? Messages.ArithOpBadTypes : Messages.RelationalOpBadTypes, new object[] { op.ToString(), (lhs == typeof(NullLiteral)) ? Messages.NullValue : RuleDecompiler.DecompileType(lhs), (rhs == typeof(NullLiteral)) ? Messages.NullValue : RuleDecompiler.DecompileType(rhs) });
error = new ValidationError(str2, 0x545);
return null;
}
MethodInfo info4 = validator.FindBestCandidate(null, candidates, new Type[] { lhs, rhs });
if (info4 != null)
{
error = null;
return info4;
}
str2 = string.Format(CultureInfo.CurrentCulture, Messages.AmbiguousOperator, new object[] { op.ToString(), RuleDecompiler.DecompileMethod(candidates[0]), RuleDecompiler.DecompileMethod(candidates[1]) });
error = new ValidationError(str2, 0x545);
return null;
}