Fix for Explicit DefaultValue is not defined (#31)

* Fix for Explicit DefaultValue is not defined

* .

src/ProxyInterfaceSourceGenerator/Extensions/ParameterSymbolExtensions.cs

@@ -26,8 +26,16 @@ internal static class ParameterSymbolExtensions
     public static string GetParamsPrefix(this IParameterSymbol ps) =>
         ps.IsParams ? "params " : string.Empty;
 
-    public static string GetDefaultValue(this IParameterSymbol ps) =>
-        ps.HasExplicitDefaultValue ? $" = {ps.ExplicitDefaultValue}" : string.Empty;
+    public static string GetDefaultValue(this IParameterSymbol ps)
+    {
+        if (!ps.HasExplicitDefaultValue)
+        {
+            return string.Empty;
+        }
+
+        var defaultValue = ps.ExplicitDefaultValue ?? "null";
+        return $" = {defaultValue}";
+    }
 
     public static TypeEnum GetTypeEnum(this IParameterSymbol p) =>
         p.Type.GetTypeEnum();

tests/ProxyInterfaceSourceGeneratorTests/Destination/ProxyInterfaceSourceGeneratorTests.Source.IPerson.g.cs

@@ -46,6 +46,8 @@ namespace ProxyInterfaceSourceGeneratorTests.Source
 
         System.Threading.Tasks.Task<string?> Method3Async();
 
+        void CreateInvokeHttpClient(int i = 5, string? appId = null);
+
 
 
 

tests/ProxyInterfaceSourceGeneratorTests/Destination/ProxyInterfaceSourceGeneratorTests.Source.PersonProxy.g.cs

@@ -105,6 +105,13 @@ namespace ProxyInterfaceSourceGeneratorTests.Source
             return result__57684656;
         }
 
+        public void CreateInvokeHttpClient(int i = 5, string? appId = null)
+        {
+            int i_ = i;
+            string? appId_ = appId;
+            _Instance.CreateInvokeHttpClient(i_, appId_);
+        }
+
 
 
 

tests/ProxyInterfaceSourceGeneratorTests/Source/Person.cs

@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using System.Net.Http;
 using System.Threading.Tasks;
 
 namespace ProxyInterfaceSourceGeneratorTests.Source
@@ -67,5 +68,9 @@ namespace ProxyInterfaceSourceGeneratorTests.Source
         {
             return Task.FromResult((string?)"");
         }
+
+        public void CreateInvokeHttpClient(int i = 5, string? appId = null)
+        {
+        }
     }
 }