GetEqualityComparisonOperator()

static BinaryExpression System.Linq.Expressions.Expression< TDelegate >.GetEqualityComparisonOperator ( ExpressionType binaryType, string opName, Expression< TDelegate > left, Expression< TDelegate > right, bool liftToNull )

inlinestaticprivateinherited

Definition at line 1089 of file Expression.cs.

    {
        if (left.Type == right.Type && (left.Type.IsNumeric() || left.Type == typeof(object) || left.Type.IsBool() || left.Type.GetNonNullableType().IsEnum))
        {
            if (left.Type.IsNullableType() && liftToNull)
            {
                return new SimpleBinaryExpression(binaryType, left, right, typeof(bool?));
            }
            return new LogicalBinaryExpression(binaryType, left, right);
        }
        BinaryExpression userDefinedBinaryOperator = GetUserDefinedBinaryOperator(binaryType, opName, left, right, liftToNull);
        if (userDefinedBinaryOperator != null)
        {
            return userDefinedBinaryOperator;
        }
        if (TypeUtils.HasBuiltInEqualityOperator(left.Type, right.Type) || IsNullComparison(left, right))
        {
            if (left.Type.IsNullableType() && liftToNull)
            {
                return new SimpleBinaryExpression(binaryType, left, right, typeof(bool?));
            }
            return new LogicalBinaryExpression(binaryType, left, right);
        }
        throw Error.BinaryOperatorNotDefined(binaryType, left.Type, right.Type);
    }

References System.Linq.Expressions.Error.BinaryOperatorNotDefined(), System.Linq.Expressions.Expression< TDelegate >.GetUserDefinedBinaryOperator(), System.Dynamic.Utils.TypeUtils.HasBuiltInEqualityOperator(), and System.Linq.Expressions.Expression< TDelegate >.IsNullComparison().

Referenced by System.Linq.Expressions.Expression< TDelegate >.Equal(), and System.Linq.Expressions.Expression< TDelegate >.NotEqual().