Generate Relational Members

ReSharper | Edit | Generate Code | Relational Members

Alt+Insert | Relational Members (ReSharper_GenerateRelationalMembers)

ReSharper helps you automatically overload relational operators and implementations of related interfaces using selected fields and properties. By default, ReSharper will create an implementation of IComparable<T>, and optionally, operators >, <, ≥ and ≤ as well as an implementation of IComparable are generated too.

In the example below, this command is used to generate relational members that takes into account int _birthYear and string _name fields when to compare objects of the Person class.

Before generation	After generation
`class Person { private int _birthYear; private string _name; }`	class Person : IComparable<Person>, IComparable { private int _birthYear; private string _name; public int CompareTo(Person other) { if (ReferenceEquals(this, other)) return 0; if (ReferenceEquals(null, other)) return 1; var birthYearComparison = _birthYear.CompareTo(other._birthYear); if (birthYearComparison != 0) return birthYearComparison; return string.Compare(_name, other._name, StringComparison.Ordinal); } // Optionally: Implementation of IComparable and relational operators public int CompareTo(object obj) { if (ReferenceEquals(null, obj)) return 1; if (ReferenceEquals(this, obj)) return 0; if (!(obj is Person)) throw new ArgumentException($"Object must be of type {nameof(Person)}"); return CompareTo((Person) obj); } public static bool operator <(Person left, Person right) { return Comparer<Person>.Default.Compare(left, right) < 0; } public static bool operator >(Person left, Person right) { return Comparer<Person>.Default.Compare(left, right) > 0; } public static bool operator <=(Person left, Person right) { return Comparer<Person>.Default.Compare(left, right) <= 0; } public static bool operator >=(Person left, Person right) { return Comparer<Person>.Default.Compare(left, right) >= 0; } }

Before generation

After generation

class Person
{
    private int _birthYear;
    private string _name;
}

class Person : IComparable<Person>, IComparable
{
    private int _birthYear;
    private string _name;

    public int CompareTo(Person other)
    {
      if (ReferenceEquals(this, other)) return 0;
      if (ReferenceEquals(null, other)) return 1;
      var birthYearComparison = _birthYear.CompareTo(other._birthYear);
      if (birthYearComparison != 0) return birthYearComparison;
      return string.Compare(_name, other._name, StringComparison.Ordinal);
    }

    // Optionally: Implementation of IComparable and relational operators

    public int CompareTo(object obj)
    {
      if (ReferenceEquals(null, obj)) return 1;
      if (ReferenceEquals(this, obj)) return 0;
      if (!(obj is Person))
        throw new ArgumentException($"Object must be of type {nameof(Person)}");
      return CompareTo((Person) obj);
    }

    public static bool operator <(Person left, Person right)
    {
      return Comparer<Person>.Default.Compare(left, right) < 0;
    }

    public static bool operator >(Person left, Person right)
    {
      return Comparer<Person>.Default.Compare(left, right) > 0;
    }

    public static bool operator <=(Person left, Person right)
    {
      return Comparer<Person>.Default.Compare(left, right) <= 0;
    }

    public static bool operator >=(Person left, Person right)
    {
      return Comparer<Person>.Default.Compare(left, right) >= 0;
    }
}

Generate Relational Members

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Generate Relational Members﻿

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