From f7b5ef49c86de0d2f79c9c85efc92d8c6ba6926f Mon Sep 17 00:00:00 2001
From: Oliver Booth <me@olivr.me>
Date: Tue, 26 Apr 2022 10:32:02 +0100
Subject: [PATCH] Remove Type.HasCustomAttribute and
 Type.SelectFromCustomAttribute

Since Type inherits MemberInfo, these methods are implicitly available via MemberInfoExtensions
---
 .../ReflectionExtensions/TypeExtensions.cs    | 86 -------------------
 1 file changed, 86 deletions(-)

diff --git a/X10D/src/ReflectionExtensions/TypeExtensions.cs b/X10D/src/ReflectionExtensions/TypeExtensions.cs
index 03e13ba..8a8d4d5 100644
--- a/X10D/src/ReflectionExtensions/TypeExtensions.cs
+++ b/X10D/src/ReflectionExtensions/TypeExtensions.cs
@@ -8,59 +8,6 @@ namespace X10D;
 /// </summary>
 public static class TypeExtensions
 {
-    /// <summary>
-    ///     Returns a value indicating whether or not the current type has been decorated with a specified attribute.
-    /// </summary>
-    /// <param name="type">The type whose attributes to check.</param>
-    /// <typeparam name="T">The attribute type.</typeparam>
-    /// <returns>
-    ///     <see langword="true" /> if the current type has been decorated with a specified attribute, or
-    ///     <see langword="false" /> otherwise.
-    /// </returns>
-    /// <exception cref="ArgumentNullException"><paramref name="type" /> is <see langword="null" />.</exception>
-    public static bool HasCustomAttribute<T>(this Type type)
-        where T : Attribute
-    {
-        if (type is null)
-        {
-            throw new ArgumentNullException(nameof(type));
-        }
-
-        return type.HasCustomAttribute(typeof(T));
-    }
-
-    /// <summary>
-    ///     Returns a value indicating whether or not the current type has been decorated with a specified attribute.
-    /// </summary>
-    /// <param name="type">The type whose attributes to check.</param>
-    /// <param name="attribute">The attribute type.</param>
-    /// <returns>
-    ///     <see langword="true" /> if the current type has been decorated with a specified attribute, or
-    ///     <see langword="false" /> otherwise.
-    /// </returns>
-    /// <exception cref="ArgumentNullException"><paramref name="type" /> is <see langword="null" />.</exception>
-    public static bool HasCustomAttribute(this Type type, Type attribute)
-    {
-        if (type is null)
-        {
-            throw new ArgumentNullException(nameof(type));
-        }
-
-        if (attribute is null)
-        {
-            throw new ArgumentNullException(nameof(attribute));
-        }
-
-        if (!attribute.Inherits<Attribute>())
-        {
-            throw new ArgumentException(
-                string.Format(CultureInfo.CurrentCulture, ExceptionMessages.TypeDoesNotInheritAttribute, attribute),
-                nameof(attribute));
-        }
-
-        return type.GetCustomAttribute(attribute) is not null;
-    }
-
     /// <summary>
     ///     Returns a value indicating whether the current type implements a specified interface.
     /// </summary>
@@ -155,37 +102,4 @@ public static class TypeExtensions
 
         return value.IsSubclassOf(type);
     }
-
-    /// <summary>
-    ///     Retrieves a custom attribute that is decorated by the current type, and projects it into to a new form.
-    /// </summary>
-    /// <typeparam name="TAttribute">The attribute type.</typeparam>
-    /// <typeparam name="TReturn">The return type of the <paramref name="selector" /> delegate.</typeparam>
-    /// <param name="type">The type.</param>
-    /// <param name="selector">A transform function to apply to the attribute.</param>
-    /// <returns>
-    ///     An instance of <typeparamref name="TReturn" /> as provided from <paramref name="selector" />.
-    /// </returns>
-    /// <exception cref="ArgumentNullException">
-    ///     <paramref name="type" /> is <see langword="null" />
-    ///     -or-
-    ///     <paramref name="selector" /> is <see langword="null" />.
-    /// </exception>
-    public static TReturn? SelectFromCustomAttribute<TAttribute, TReturn>(this Type type, Func<TAttribute, TReturn> selector)
-        where TAttribute : Attribute
-    {
-        if (type is null)
-        {
-            throw new ArgumentNullException(nameof(type));
-        }
-
-        if (selector is null)
-        {
-            throw new ArgumentNullException(nameof(selector));
-        }
-
-        return type.GetCustomAttribute<TAttribute>() is { } attribute
-            ? selector(attribute)
-            : default;
-    }
 }