diff options
Diffstat (limited to 'Xamarin.Forms.Build.Tasks/TypeDefinitionExtensions.cs')
| -rw-r--r-- | Xamarin.Forms.Build.Tasks/TypeDefinitionExtensions.cs | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/Xamarin.Forms.Build.Tasks/TypeDefinitionExtensions.cs b/Xamarin.Forms.Build.Tasks/TypeDefinitionExtensions.cs new file mode 100644 index 00000000..51b3fdbf --- /dev/null +++ b/Xamarin.Forms.Build.Tasks/TypeDefinitionExtensions.cs @@ -0,0 +1,66 @@ +using System; +using System.Collections.Generic; +using System.Reflection; +using Mono.Cecil; +using Mono.Cecil.Cil; +using MethodAttributes = Mono.Cecil.MethodAttributes; +using MethodImplAttributes = Mono.Cecil.MethodImplAttributes; + +namespace Xamarin.Forms.Build.Tasks +{ + static class TypeDefinitionExtensions + { + public static MethodDefinition AddDefaultConstructor(this TypeDefinition targetType) + { + var parentType = typeof (object); + + return AddDefaultConstructor(targetType, parentType); + } + + public static MethodDefinition AddDefaultConstructor(this TypeDefinition targetType, Type parentType) + { + var module = targetType.Module; + var voidType = module.Import(typeof (void)); + var methodAttributes = MethodAttributes.Public | + MethodAttributes.HideBySig | + MethodAttributes.SpecialName | + MethodAttributes.RTSpecialName; + + var flags = BindingFlags.Public | + BindingFlags.NonPublic | + BindingFlags.Instance; + + var objectConstructor = parentType.GetConstructor(flags, null, new Type[0], null); + + if (objectConstructor == null) + objectConstructor = typeof (object).GetConstructor(new Type[0]); + + var baseConstructor = module.Import(objectConstructor); + + var ctor = new MethodDefinition(".ctor", methodAttributes, voidType) + { + CallingConvention = MethodCallingConvention.Default, + ImplAttributes = (MethodImplAttributes.IL | MethodImplAttributes.Managed) + }; + + var IL = ctor.Body.GetILProcessor(); + + IL.Emit(OpCodes.Ldarg_0); + IL.Emit(OpCodes.Call, baseConstructor); + IL.Emit(OpCodes.Ret); + + targetType.Methods.Add(ctor); + return ctor; + } + + public static IEnumerable<MethodDefinition> AllMethods(this TypeDefinition self) + { + while (self != null) + { + foreach (var md in self.Methods) + yield return md; + self = self.BaseType == null ? null : self.BaseType.Resolve(); + } + } + } +}
\ No newline at end of file |