public XamlIlNodeEmitResult Emit(XamlIlEmitContext context, IXamlIlEmitter codeGen)
{
// Discard the stack value we are "supposed" to manipulate
codeGen.Pop();
context.Emit(Imperative, codeGen, null);
return(XamlIlNodeEmitResult.Void(1));
}
public override void Emit(IXamlIlEmitter codegen)
{
var unsetValue = Types.AvaloniaProperty.Fields.First(f => f.Name == "UnsetValue");
codegen
// Ignore the instance and load one from the static field to avoid extra local variable
.Pop()
.Ldsfld(AvaloniaProperty)
.Ldsfld(unsetValue)
.Ldc_I4(0)
.EmitCall(Types.AvaloniaObjectSetValueMethod, true);
}
public static IXamlIlEmitter EmitCall(this IXamlIlEmitter emitter, IXamlIlMethod method, bool swallowResult = false)
{
if (method is IXamlIlCustomEmitMethod custom)
{
custom.EmitCall(emitter);
}
else
{
emitter.Emit(method.IsStatic ? OpCodes.Call : OpCodes.Callvirt, method);
}
if (swallowResult && !(method.ReturnType.Namespace == "System" && method.ReturnType.Name == "Void"))
{
emitter.Pop();
}
return(emitter);
}
public XamlIlNodeEmitResult Emit(IXamlIlAstNode node, XamlIlEmitContext context, IXamlIlEmitter codeGen)
{
if (!(node is XamlIlManipulationGroupNode group))
{
return(null);
}
if (group.Children.Count == 0)
{
codeGen.Pop();
}
else
{
for (var c = 0; c < group.Children.Count; c++)
{
if (c != group.Children.Count - 1)
{
codeGen.Emit(OpCodes.Dup);
}
context.Emit(group.Children[c], codeGen, null);
}
}
return(XamlIlNodeEmitResult.Void(1));
}