yog-script-analyze 0.4.0

namespace System.Logging;

/// A logger writing nothing (.NET's `NullLogger`): where one is wanted and
/// nothing's to be written.
public readonly sealed class NullLogger : ILogger {
    public static readonly NullLogger Instance = new NullLogger();

    public readonly void Log<TState>(LogLevel logLevel, EventId eventId, TState state, Error? error, Func<TState, Error?, string> formatter) { }

    public readonly bool IsEnabled(LogLevel logLevel) => false;

    public readonly IDisposable? BeginScope<TState>(TState state) => NullScope.Instance;
}

/// A logger of `T`'s category writing nothing (.NET's `NullLogger<T>`).
public readonly sealed class NullLogger<T> : ILogger<T> {
    public static readonly NullLogger<T> Instance = new NullLogger<T>();

    public readonly void Log<TState>(LogLevel logLevel, EventId eventId, TState state, Error? error, Func<TState, Error?, string> formatter) { }

    public readonly bool IsEnabled(LogLevel logLevel) => false;

    public readonly IDisposable? BeginScope<TState>(TState state) => NullScope.Instance;
}

/// A scope that holds nothing (.NET's `NullScope`).
public readonly sealed class NullScope : IDisposable {
    public static readonly NullScope Instance = new NullScope();

    public void Dispose() { }
}

/// A factory of loggers writing nothing (.NET's `NullLoggerFactory`).
public readonly sealed class NullLoggerFactory : ILoggerFactory {
    public static readonly NullLoggerFactory Instance = new NullLoggerFactory();

    public readonly ILogger CreateLogger(string categoryName) => NullLogger.Instance;

    public readonly void AddProvider(ILoggerProvider provider) { }

    public void Dispose() { }
}

/// A provider of loggers writing nothing (.NET's `NullLoggerProvider`).
public readonly sealed class NullLoggerProvider : ILoggerProvider {
    public static readonly NullLoggerProvider Instance = new NullLoggerProvider();

    public readonly ILogger CreateLogger(string categoryName) => NullLogger.Instance;

    public void Dispose() { }
}