Use c# 12 primary constructors

src/NSubstitute/Compatibility/DiagnosticsNullabilityAttributes.cs

@@ -22,64 +22,56 @@ internal sealed class MaybeNullAttribute : Attribute { }
 internal sealed class NotNullAttribute : Attribute { }
 
 /// <summary>Specifies that when a method returns <see cref="ReturnValue"/>, the parameter may be null even if the corresponding type disallows it.</summary>
+/// <remarks>Initializes the attribute with the specified return value condition.</remarks>
+/// <param name="returnValue">
+/// The return value condition. If the method returns this value, the associated parameter may be null.
+/// </param>
 [AttributeUsage(AttributeTargets.Parameter, Inherited = false)]
-internal sealed class MaybeNullWhenAttribute : Attribute
+internal sealed class MaybeNullWhenAttribute(bool returnValue) : Attribute
 {
-    /// <summary>Initializes the attribute with the specified return value condition.</summary>
-    /// <param name="returnValue">
-    /// The return value condition. If the method returns this value, the associated parameter may be null.
-    /// </param>
-    public MaybeNullWhenAttribute(bool returnValue) => ReturnValue = returnValue;
-
     /// <summary>Gets the return value condition.</summary>
-    public bool ReturnValue { get; }
+    public bool ReturnValue { get; } = returnValue;
 }
 
 /// <summary>Specifies that when a method returns <see cref="ReturnValue"/>, the parameter will not be null even if the corresponding type allows it.</summary>
+/// <remarks>Initializes the attribute with the specified return value condition.</remarks>
+/// <param name="returnValue">
+/// The return value condition. If the method returns this value, the associated parameter will not be null.
+/// </param>
 [AttributeUsage(AttributeTargets.Parameter, Inherited = false)]
-internal sealed class NotNullWhenAttribute : Attribute
+internal sealed class NotNullWhenAttribute(bool returnValue) : Attribute
 {
-    /// <summary>Initializes the attribute with the specified return value condition.</summary>
-    /// <param name="returnValue">
-    /// The return value condition. If the method returns this value, the associated parameter will not be null.
-    /// </param>
-    public NotNullWhenAttribute(bool returnValue) => ReturnValue = returnValue;
-
     /// <summary>Gets the return value condition.</summary>
-    public bool ReturnValue { get; }
+    public bool ReturnValue { get; } = returnValue;
 }
 
 /// <summary>Specifies that the output will be non-null if the named parameter is non-null.</summary>
+/// <remarks>Initializes the attribute with the associated parameter name.</remarks>
+/// <param name="parameterName">
+/// The associated parameter name.  The output will be non-null if the argument to the parameter specified is non-null.
+/// </param>
 [AttributeUsage(AttributeTargets.Parameter | AttributeTargets.Property | AttributeTargets.ReturnValue, AllowMultiple = true, Inherited = false)]
-internal sealed class NotNullIfNotNullAttribute : Attribute
+internal sealed class NotNullIfNotNullAttribute(string parameterName) : Attribute
 {
-    /// <summary>Initializes the attribute with the associated parameter name.</summary>
-    /// <param name="parameterName">
-    /// The associated parameter name.  The output will be non-null if the argument to the parameter specified is non-null.
-    /// </param>
-    public NotNullIfNotNullAttribute(string parameterName) => ParameterName = parameterName;
-
     /// <summary>Gets the associated parameter name.</summary>
-    public string ParameterName { get; }
+    public string ParameterName { get; } = parameterName;
 }
 
 /// <summary>Applied to a method that will never return under any circumstance.</summary>
 [AttributeUsage(AttributeTargets.Method, Inherited = false)]
 internal sealed class DoesNotReturnAttribute : Attribute { }
 
 /// <summary>Specifies that the method will not return if the associated Boolean parameter is passed the specified value.</summary>
+/// <remarks>Initializes the attribute with the specified parameter value.</remarks>
+/// <param name="parameterValue">
+/// The condition parameter value. Code after the method will be considered unreachable by diagnostics if the argument to
+/// the associated parameter matches this value.
+/// </param>
 [AttributeUsage(AttributeTargets.Parameter, Inherited = false)]
-internal sealed class DoesNotReturnIfAttribute : Attribute
+internal sealed class DoesNotReturnIfAttribute(bool parameterValue) : Attribute
 {
-    /// <summary>Initializes the attribute with the specified parameter value.</summary>
-    /// <param name="parameterValue">
-    /// The condition parameter value. Code after the method will be considered unreachable by diagnostics if the argument to
-    /// the associated parameter matches this value.
-    /// </param>
-    public DoesNotReturnIfAttribute(bool parameterValue) => ParameterValue = parameterValue;
-
     /// <summary>Gets the condition parameter value.</summary>
-    public bool ParameterValue { get; }
+    public bool ParameterValue { get; } = parameterValue;
 }
 
 /// <summary>Specifies that the method or property will ensure that the listed field and property members have not-null values.</summary>

src/NSubstitute/Core/ArgumentSpecificationDequeue.cs

@@ -3,17 +3,10 @@
 
 namespace NSubstitute.Core;
 
-public class ArgumentSpecificationDequeue : IArgumentSpecificationDequeue
+public class ArgumentSpecificationDequeue(Func<IList<IArgumentSpecification>> dequeueAllQueuedArgSpecs) : IArgumentSpecificationDequeue
 {
     private static readonly IArgumentSpecification[] EmptySpecifications = [];
 
-    private readonly Func<IList<IArgumentSpecification>> _dequeueAllQueuedArgSpecs;
-
-    public ArgumentSpecificationDequeue(Func<IList<IArgumentSpecification>> dequeueAllQueuedArgSpecs)
-    {
-        _dequeueAllQueuedArgSpecs = dequeueAllQueuedArgSpecs;
-    }
-
     public IList<IArgumentSpecification> DequeueAllArgumentSpecificationsForMethod(int parametersCount)
     {
         if (parametersCount == 0)
@@ -24,7 +17,7 @@ public IList<IArgumentSpecification> DequeueAllArgumentSpecificationsForMethod(i
             return EmptySpecifications;
         }
 
-        var queuedArgSpecifications = _dequeueAllQueuedArgSpecs.Invoke();
+        var queuedArgSpecifications = dequeueAllQueuedArgSpecs.Invoke();
         return queuedArgSpecifications;
     }
 

src/NSubstitute/Core/Arguments/AnyArgumentMatcher.cs

@@ -1,15 +1,8 @@
 namespace NSubstitute.Core.Arguments;
 
-public class AnyArgumentMatcher : IArgumentMatcher
+public class AnyArgumentMatcher(Type typeArgMustBeCompatibleWith) : IArgumentMatcher
 {
-    private readonly Type _typeArgMustBeCompatibleWith;
+    public override string ToString() => "any " + typeArgMustBeCompatibleWith.GetNonMangledTypeName();
 
-    public AnyArgumentMatcher(Type typeArgMustBeCompatibleWith)
-    {
-        _typeArgMustBeCompatibleWith = typeArgMustBeCompatibleWith;
-    }
-
-    public override string ToString() => "any " + _typeArgMustBeCompatibleWith.GetNonMangledTypeName();
-
-    public bool IsSatisfiedBy(object? argument) => argument.IsCompatibleWith(_typeArgMustBeCompatibleWith);
+    public bool IsSatisfiedBy(object? argument) => argument.IsCompatibleWith(typeArgMustBeCompatibleWith);
 }

src/NSubstitute/Core/Arguments/ArgumentMatchInfo.cs

@@ -1,17 +1,10 @@
 namespace NSubstitute.Core.Arguments;
 
-public class ArgumentMatchInfo
+public class ArgumentMatchInfo(int index, object? argument, IArgumentSpecification specification)
 {
-    public ArgumentMatchInfo(int index, object? argument, IArgumentSpecification specification)
-    {
-        Index = index;
-        _argument = argument;
-        _specification = specification;
-    }
-
-    private readonly object? _argument;
-    private readonly IArgumentSpecification _specification;
-    public int Index { get; }
+    private readonly object? _argument = argument;
+    private readonly IArgumentSpecification _specification = specification;
+    public int Index { get; } = index;
 
     public bool IsMatch => _specification.IsSatisfiedBy(_argument);
 

src/NSubstitute/Core/Arguments/ArgumentMatcher.cs

@@ -33,14 +33,9 @@ public static class ArgumentMatcher
         return ref new DefaultValueContainer<T>().Value;
     }
 
-    private class GenericToNonGenericMatcherProxy<T> : IArgumentMatcher
+    private class GenericToNonGenericMatcherProxy<T>(IArgumentMatcher<T> matcher) : IArgumentMatcher
     {
-        protected readonly IArgumentMatcher<T> _matcher;
-
-        public GenericToNonGenericMatcherProxy(IArgumentMatcher<T> matcher)
-        {
-            _matcher = matcher;
-        }
+        protected readonly IArgumentMatcher<T> _matcher = matcher;
 
         public bool IsSatisfiedBy(object? argument) => _matcher.IsSatisfiedBy((T?)argument!);
     }

src/NSubstitute/Core/Arguments/ArgumentSpecification.cs

@@ -1,23 +1,13 @@
 namespace NSubstitute.Core.Arguments;
 
-public class ArgumentSpecification : IArgumentSpecification
+public class ArgumentSpecification(Type forType, IArgumentMatcher matcher, Action<object?> action) : IArgumentSpecification
 {
     private static readonly Action<object?> NoOpAction = _ => { };
-
-    private readonly IArgumentMatcher _matcher;
-    private readonly Action<object?> _action;
-    public Type ForType { get; }
-    public bool HasAction => _action != NoOpAction;
+    public Type ForType { get; } = forType;
+    public bool HasAction => action != NoOpAction;
 
     public ArgumentSpecification(Type forType, IArgumentMatcher matcher) : this(forType, matcher, NoOpAction) { }
 
-    public ArgumentSpecification(Type forType, IArgumentMatcher matcher, Action<object?> action)
-    {
-        ForType = forType;
-        _matcher = matcher;
-        _action = action;
-    }
-
     public bool IsSatisfiedBy(object? argument)
     {
         if (!IsCompatibleWith(argument))
@@ -27,7 +17,7 @@ public bool IsSatisfiedBy(object? argument)
 
         try
         {
-            return _matcher.IsSatisfiedBy(argument);
+            return matcher.IsSatisfiedBy(argument);
         }
         catch
         {
@@ -42,7 +32,7 @@ public string DescribeNonMatch(object? argument)
             return GetIncompatibleTypeMessage(argument);
         }
 
-        return _matcher is IDescribeNonMatches describe
+        return matcher is IDescribeNonMatches describe
             ? describe.DescribeFor(argument)
             : string.Empty;
     }
@@ -51,12 +41,12 @@ public string FormatArgument(object? argument)
     {
         var isSatisfiedByArg = IsSatisfiedBy(argument);
 
-        return _matcher is IArgumentFormatter matcherFormatter
+        return matcher is IArgumentFormatter matcherFormatter
             ? matcherFormatter.Format(argument, highlight: !isSatisfiedByArg)
             : ArgumentFormatter.Default.Format(argument, highlight: !isSatisfiedByArg);
     }
 
-    public override string ToString() => _matcher.ToString() ?? string.Empty;
+    public override string ToString() => matcher.ToString() ?? string.Empty;
 
     public IArgumentSpecification CreateCopyMatchingAnyArgOfType(Type requiredType)
     {
@@ -65,19 +55,19 @@ public IArgumentSpecification CreateCopyMatchingAnyArgOfType(Type requiredType)
         return new ArgumentSpecification(
             requiredType,
             new AnyArgumentMatcher(requiredType),
-            _action == NoOpAction ? NoOpAction : RunActionIfTypeIsCompatible);
+            action == NoOpAction ? NoOpAction : RunActionIfTypeIsCompatible);
     }
 
     public void RunAction(object? argument)
     {
-        _action(argument);
+        action(argument);
     }
 
     private void RunActionIfTypeIsCompatible(object? argument)
     {
         if (argument.IsCompatibleWith(ForType))
         {
-            _action(argument);
+            action(argument);
         }
     }
 

src/NSubstitute/Core/Arguments/ArgumentSpecificationCompatibilityTester.cs

@@ -1,14 +1,7 @@
 namespace NSubstitute.Core.Arguments;
 
-public class ArgumentSpecificationCompatibilityTester : IArgumentSpecificationCompatibilityTester
+public class ArgumentSpecificationCompatibilityTester(IDefaultChecker defaultChecker) : IArgumentSpecificationCompatibilityTester
 {
-    private readonly IDefaultChecker _defaultChecker;
-
-    public ArgumentSpecificationCompatibilityTester(IDefaultChecker defaultChecker)
-    {
-        _defaultChecker = defaultChecker;
-    }
-
     public bool IsSpecificationCompatible(IArgumentSpecification specification, object? argumentValue, Type argumentType)
     {
         var typeArgSpecIsFor = specification.ForType;
@@ -18,7 +11,7 @@ public bool IsSpecificationCompatible(IArgumentSpecification specification, obje
 
     private bool IsProvidedArgumentTheOneWeWouldGetUsingAnArgSpecForThisType(object? argument, Type typeArgSpecIsFor)
     {
-        return _defaultChecker.IsDefault(argument, typeArgSpecIsFor);
+        return defaultChecker.IsDefault(argument, typeArgSpecIsFor);
     }
 
     private bool AreTypesCompatible(Type argumentType, Type typeArgSpecIsFor)

src/NSubstitute/Core/Arguments/ArgumentSpecificationFactory.cs

@@ -80,14 +80,9 @@ private IEnumerable<IArgumentSpecification> UnwrapParamsArguments(IEnumerable<ob
         return result;
     }
 
-    private class ParameterInfoFromType : IParameterInfo
+    private class ParameterInfoFromType(Type parameterType) : IParameterInfo
     {
-        public ParameterInfoFromType(Type parameterType)
-        {
-            ParameterType = parameterType;
-        }
-
-        public Type ParameterType { get; }
+        public Type ParameterType { get; } = parameterType;
 
         public bool IsParams => false;
 

src/NSubstitute/Core/Arguments/ArgumentSpecificationsFactory.cs

@@ -1,22 +1,15 @@
-using System.Reflection;
-using NSubstitute.Exceptions;
+using NSubstitute.Exceptions;
+using System.Reflection;
 
 namespace NSubstitute.Core.Arguments;
 
-public class ArgumentSpecificationsFactory : IArgumentSpecificationsFactory
+public class ArgumentSpecificationsFactory(
+    IArgumentSpecificationFactory argumentSpecificationFactory,
+    ISuppliedArgumentSpecificationsFactory suppliedArgumentSpecificationsFactory) : IArgumentSpecificationsFactory
 {
-    private readonly IArgumentSpecificationFactory _argumentSpecificationFactory;
-    private readonly ISuppliedArgumentSpecificationsFactory _suppliedArgumentSpecificationsFactory;
-
-    public ArgumentSpecificationsFactory(IArgumentSpecificationFactory argumentSpecificationFactory, ISuppliedArgumentSpecificationsFactory suppliedArgumentSpecificationsFactory)
-    {
-        _argumentSpecificationFactory = argumentSpecificationFactory;
-        _suppliedArgumentSpecificationsFactory = suppliedArgumentSpecificationsFactory;
-    }
-
     public IEnumerable<IArgumentSpecification> Create(IList<IArgumentSpecification> argumentSpecs, object?[] arguments, IParameterInfo[] parameterInfos, MethodInfo methodInfo, MatchArgs matchArgs)
     {
-        var suppliedArgumentSpecifications = _suppliedArgumentSpecificationsFactory.Create(argumentSpecs);
+        var suppliedArgumentSpecifications = suppliedArgumentSpecificationsFactory.Create(argumentSpecs);
 
         var result = new List<IArgumentSpecification>();
         for (var i = 0; i < arguments.Length; i++)
@@ -26,7 +19,7 @@ public IEnumerable<IArgumentSpecification> Create(IList<IArgumentSpecification>
 
             try
             {
-                result.Add(_argumentSpecificationFactory.Create(arg, paramInfo, suppliedArgumentSpecifications));
+                result.Add(argumentSpecificationFactory.Create(arg, paramInfo, suppliedArgumentSpecifications));
             }
             catch (AmbiguousArgumentsException ex) when (ex.ContainsDefaultMessage)
             {

src/NSubstitute/Core/Arguments/ArrayContentsArgumentMatcher.cs

@@ -2,14 +2,9 @@
 
 namespace NSubstitute.Core.Arguments;
 
-public class ArrayContentsArgumentMatcher : IArgumentMatcher, IArgumentFormatter
+public class ArrayContentsArgumentMatcher(IEnumerable<IArgumentSpecification> argumentSpecifications) : IArgumentMatcher, IArgumentFormatter
 {
-    private readonly IArgumentSpecification[] _argumentSpecifications;
-
-    public ArrayContentsArgumentMatcher(IEnumerable<IArgumentSpecification> argumentSpecifications)
-    {
-        _argumentSpecifications = argumentSpecifications.ToArray();
-    }
+    private readonly IArgumentSpecification[] _argumentSpecifications = argumentSpecifications.ToArray();
 
     public bool IsSatisfiedBy(object? argument)
     {

src/NSubstitute/Core/Arguments/DefaultChecker.cs

@@ -1,16 +1,9 @@
 namespace NSubstitute.Core.Arguments;
 
-public class DefaultChecker : IDefaultChecker
+public class DefaultChecker(IDefaultForType defaultForType) : IDefaultChecker
 {
-    private readonly IDefaultForType _defaultForType;
-
-    public DefaultChecker(IDefaultForType defaultForType)
-    {
-        _defaultForType = defaultForType;
-    }
-
     public bool IsDefault(object? value, Type forType)
     {
-        return EqualityComparer<object>.Default.Equals(value, _defaultForType.GetDefaultFor(forType));
+        return EqualityComparer<object>.Default.Equals(value, defaultForType.GetDefaultFor(forType));
     }
 }

src/NSubstitute/Core/Arguments/EqualsArgumentMatcher.cs

@@ -1,15 +1,8 @@
 namespace NSubstitute.Core.Arguments;
 
-public class EqualsArgumentMatcher : IArgumentMatcher
+public class EqualsArgumentMatcher(object? value) : IArgumentMatcher
 {
-    private readonly object? _value;
+    public override string ToString() => ArgumentFormatter.Default.Format(value, false);
 
-    public EqualsArgumentMatcher(object? value)
-    {
-        _value = value;
-    }
-
-    public override string ToString() => ArgumentFormatter.Default.Format(_value, false);
-
-    public bool IsSatisfiedBy(object? argument) => EqualityComparer<object>.Default.Equals(_value, argument);
+    public bool IsSatisfiedBy(object? argument) => EqualityComparer<object>.Default.Equals(value, argument);
 }