AssignIfNotEqualPrecedence.swift

/// The `=!=` operator assigns the value on the right-hand side to the variable on the left-hand side
/// only if the two values are not equal. This operator is designed for types conforming to the `Equatable` protocol.
///
/// - Parameters:
///   - lhs: The variable to be assigned a new value if not equal.
///   - rhs: The value to be assigned to the variable if it is not equal to the current value.
///
/// - Precondition: The type of the operands must conform to the `Equatable` protocol.
///
/// - Precedence: `AssignIfNotEqualPrecedence`
///
/// - Complexity: O(1)
///
/// - Note: The assignment operation is performed only if `lhs != rhs`.
///
/// - Example:
///   ```swift
///   var x = 42
///   let y = 24
///   x =!= y       // x is now 24
///   ```
///
infix operator =!=: AssignIfNotEqualPrecedence
public func =!=<T>(lhs: inout T, rhs: T) where T: Equatable {
    if lhs != rhs { lhs = rhs }
}

precedencegroup AssignIfNotEqualPrecedence {
    lowerThan: ComparisonPrecedence
    higherThan: AssignmentPrecedence
    associativity: left
}