public XamlIlNodeEmitResult Emit(XamlIlEmitContext context, IXamlIlEmitter codeGen)
{
var so = context.Configuration.WellKnownTypes.Object;
var isp = context.Configuration.TypeMappings.ServiceProvider;
var subType = context.CreateSubType("XamlIlClosure_" + Guid.NewGuid(), so);
var buildMethod = subType.DefineMethod(so, new[]
{
isp
}, "Build", true, true, false);
CompileBuilder(new XamlIlEmitContext(buildMethod.Generator, context.Configuration,
context.RuntimeContext, buildMethod.Generator.DefineLocal(context.RuntimeContext.ContextType),
(s, type) => subType.DefineSubType(type, s, false), context.Emitters));
var funcType = Type.GetClrType();
codeGen
.Ldnull()
.Ldftn(buildMethod)
.Newobj(funcType.Constructors.FirstOrDefault(ct =>
ct.Parameters.Count == 2 && ct.Parameters[0].Equals(context.Configuration.WellKnownTypes.Object)));
// Allow to save values from the parent context, pass own service provider, etc, etc
if (context.Configuration.TypeMappings.DeferredContentExecutorCustomization != null)
{
codeGen
.Ldloc(context.ContextLocal)
.EmitCall(context.Configuration.TypeMappings.DeferredContentExecutorCustomization);
}
subType.CreateType();
return(XamlIlNodeEmitResult.Type(0, funcType));
}
protected override void DoEmit(XamlIlEmitContext context, IXamlIlEmitter codeGen) => codeGen.Ldnull();
public static IXamlIlEmitter Ldstr(this IXamlIlEmitter emitter, string arg) => arg == null?emitter.Ldnull() : emitter.Emit(OpCodes.Ldstr, arg);