Merge pull request #623 from ds5678/generic-parameter-allow-by-ref-like

AllowByRefLike support

Author: Washi1337

src/AsmResolver.DotNet/GenericParameter.cs

@@ -155,6 +155,16 @@ public bool HasDefaultConstructorConstraint
                                 | (value ? GenericParameterAttributes.DefaultConstructorConstraint : default);
         }
 
+        /// <summary>
+        /// Gets or sets a value indicating whether this generic parameter has <see cref="GenericParameterAttributes.AllowByRefLike"/> enabled.
+        /// </summary>
+        public bool HasAllowByRefLike
+        {
+            get => (Attributes & GenericParameterAttributes.AllowByRefLike) != 0;
+            set => Attributes = (Attributes & ~GenericParameterAttributes.AllowByRefLike)
+                                | (value ? GenericParameterAttributes.AllowByRefLike : default);
+        }
+
         /// <summary>
         /// Gets the index of this parameter within the list of generic parameters that the owner defines.
         /// </summary>

src/AsmResolver.PE/DotNet/Metadata/Tables/GenericParameterAttributes.cs

@@ -40,5 +40,9 @@ public enum GenericParameterAttributes : ushort
         /// Specifies the generic parameter's type argument must have a public default constructor.
         /// </summary>
         DefaultConstructorConstraint = 0x0010,
+        /// <summary>
+        /// Specifies the generic parameter can be a ref struct type.
+        /// </summary>
+        AllowByRefLike = 0x0020,
     }
 }