[XamlC] Compiled UriTypeConverter (#1166)

Xamarin.Forms.Build.Tasks/CompiledConverters/UriTypeConverter.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+using Mono.Cecil;
+using Mono.Cecil.Cil;
+using Xamarin.Forms.Xaml;
+
+namespace Xamarin.Forms.Core.XamlC
+{
+	class UriTypeConverter : ICompiledTypeConverter
+	{
+		public IEnumerable<Instruction> ConvertFromString(string value, ModuleDefinition module, BaseNode node)
+		{
+			if (string.IsNullOrWhiteSpace(value)) {
+				yield return Instruction.Create(OpCodes.Ldnull);
+				yield break;
+			}
+
+			var uriCtor = module.ImportReference(typeof(Uri)).Resolve().Methods.FirstOrDefault(md => md.IsConstructor && md.Parameters.Count == 2 && md.Parameters[1].ParameterType.FullName == "System.UriKind");
+			var uriCtorRef = module.ImportReference(uriCtor);
+
+			yield return Instruction.Create(OpCodes.Ldstr, value);
+			yield return Instruction.Create(OpCodes.Ldc_I4_0); //UriKind.RelativeOrAbsolute
+			yield return Instruction.Create(OpCodes.Newobj, uriCtorRef);
+		}
+	}
+}

Xamarin.Forms.Build.Tasks/Xamarin.Forms.Build.Tasks.csproj

@@ -112,6 +112,7 @@
     <Compile Include="CompiledMarkupExtensions\TypeExtension.cs" />
     <Compile Include="CompiledMarkupExtensions\NullExtension.cs" />
     <Compile Include="GetTasksAbi.cs" />
+    <Compile Include="CompiledConverters\UriTypeConverter.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <Target Name="AfterBuild">

Xamarin.Forms.Core/UriTypeConverter.cs

@@ -2,6 +2,7 @@
 
 namespace Xamarin.Forms
 {
+	[Xaml.ProvideCompiled("Xamarin.Forms.Core.XamlC.UriTypeConverter")]
 	public class UriTypeConverter : TypeConverter
 	{
 		public override object ConvertFromInvariantString(string value)