public void Emit(XamlEmitContextWithLocals <IXamlILEmitter, XamlILNodeEmitResult> context, IXamlILEmitter codeGen, bool swallowResult)
{
int firstCast = -1;
for (var c = ParametersWithThis.Count - 1; c >= 0; c--)
{
if (!_method.ParametersWithThis[c].Equals(ParametersWithThis[c]))
{
firstCast = c;
}
}
if (firstCast != -1)
{
var locals = new Stack <XamlLocalsPool.PooledLocal>();
for (var c = ParametersWithThis.Count - 1; c >= firstCast; c--)
{
codeGen.Castclass(_method.ParametersWithThis[c]);
if (c > firstCast)
{
var l = context.GetLocalOfType(_method.ParametersWithThis[c]);
codeGen.Stloc(l.Local);
locals.Push(l);
}
}
while (locals.Count != 0)
{
using (var l = locals.Pop())
codeGen.Ldloc(l.Local);
}
}
context.Emit(_method, codeGen, swallowResult);
}
public XamlILNodeEmitResult Emit(IXamlAstNode node, XamlEmitContextWithLocals <IXamlILEmitter, XamlILNodeEmitResult> context, IXamlILEmitter codeGen)
{
if (node is RobustNameScopeRegistrationXamlIlNode registration)
{
var scopeField = context.RuntimeContext.ContextType.Fields.First(f =>
f.Name == XamlCompiler.ContextNameScopeFieldName);
var namescopeRegisterFunction = context.Configuration.TypeSystem
.FindType("Robust.Client.UserInterface.XAML.NameScope").Methods
.First(m => m.Name == "Register");
using (var targetLoc = context.GetLocalOfType(context.Configuration.TypeSystem.FindType("Robust.Client.UserInterface.Control")))
{
codeGen
// var target = {pop}
.Stloc(targetLoc.Local)
// _context.NameScope.Register(Name, target)
.Ldloc(context.ContextLocal)
.Ldfld(scopeField);
context.Emit(registration.Name, codeGen, registration.Name.Type.GetClrType());
codeGen
.Ldloc(targetLoc.Local)
.EmitCall(namescopeRegisterFunction, true);
}
return(XamlILNodeEmitResult.Void(1));
}
return(default);
public XamlILNodeEmitResult Emit(IXamlAstNode node, XamlEmitContextWithLocals <IXamlILEmitter, XamlILNodeEmitResult> context, IXamlILEmitter codeGen)
{
if (node is AvaloniaNameScopeRegistrationXamlIlNode registration)
{
var scopeField = context.RuntimeContext.ContextType.Fields.First(f =>
f.Name == AvaloniaXamlIlLanguage.ContextNameScopeFieldName);
using (var targetLoc = context.GetLocalOfType(context.Configuration.WellKnownTypes.Object))
{
codeGen
// var target = {pop}
.Stloc(targetLoc.Local)
// _context.NameScope.Register(Name, target)
.Ldloc(context.ContextLocal)
.Ldfld(scopeField);
context.Emit(registration.Name, codeGen, registration.Name.Type.GetClrType());
codeGen
.Ldloc(targetLoc.Local)
.EmitCall(context.GetAvaloniaTypes().INameScopeRegister, true);
}
return(XamlILNodeEmitResult.Void(1));
}
return(default);
public XamlILNodeEmitResult Emit(IXamlAstNode node, XamlEmitContextWithLocals <IXamlILEmitter, XamlILNodeEmitResult> context, IXamlILEmitter codeGen)
{
if (!(node is XamlObjectInitializationNode init))
{
return(null);
}
var supportInitType = context.Configuration.TypeMappings.SupportInitialize;
var supportsInitialize = supportInitType != null &&
context.Configuration.TypeMappings.SupportInitialize
.IsAssignableFrom(init.Type);
if (supportsInitialize)
{
codeGen
// We need a copy for/EndInit
.Emit(OpCodes.Dup);
if (!init.SkipBeginInit)
{
codeGen
.Emit(OpCodes.Dup)
.EmitCall(supportInitType.FindMethod(m => m.Name == "BeginInit"));
}
}
var addToParentStack = context.RuntimeContext.ParentListField != null &&
!init.Type.IsValueType &&
context.GetOrCreateItem <XamlNeedsParentStackCache>().NeedsParentStack(node);
if (addToParentStack)
{
using (var local = context.GetLocalOfType(init.Type))
codeGen
.Stloc(local.Local)
.Ldloc(context.ContextLocal)
.Ldloc(local.Local)
.EmitCall(context.RuntimeContext.PushParentMethod)
.Ldloc(local.Local);
}
using (codeGen.EmitObjectInitializationMarker(init.Type.FullName))
{
context.Emit(init.Manipulation, codeGen, null);
if (addToParentStack)
{
codeGen
.Ldloc(context.ContextLocal)
.EmitCall(context.RuntimeContext.PopParentMethod, true);
}
}
if (supportsInitialize)
{
codeGen
.EmitCall(supportInitType.FindMethod(m => m.Name == "EndInit"));
}
return(XamlILNodeEmitResult.Void(1));
}
public static void EmitConvert(XamlEmitContextWithLocals <IXamlILEmitter, XamlILNodeEmitResult> context, IXamlLineInfo node, IXamlType what,
IXamlType to, Func <bool, IXamlILEmitter> ld)
{
if (what.Equals(to))
{
ld(false);
}
else if (what == XamlPseudoType.Null)
{
if (to.IsValueType)
{
if (to.GenericTypeDefinition?.Equals(context.Configuration.WellKnownTypes.NullableT) == true)
{
using (var loc = context.GetLocalOfType(to))
ld(false)
.Pop()
.Ldloca(loc.Local)
.Emit(OpCodes.Initobj, to)
.Ldloc(loc.Local);
}
else
{
throw new XamlLoadException("Unable to convert {x:Null} to " + to.GetFqn(), node);
}
}
else
{
ld(false);
}
}
else if (what.IsValueType && to.IsValueType)
{
if (to.IsNullableOf(what))
{
ld(false).Emit(OpCodes.Newobj,
to.Constructors.First(c =>
c.Parameters.Count == 1 && c.Parameters[0].Equals(what)));
}
else if (what.IsNullableOf(what))
{
ld(true)
.EmitCall(what.FindMethod(m => m.Name == "get_Value"));
}
else
{
throw new XamlLoadException(
$"Don't know how to convert value type {what.GetFullName()} to value type {to.GetFullName()}",
node);
}
}
else if (!to.IsValueType && what.IsValueType)
{
if (!to.IsAssignableFrom(what))
{
throw new XamlLoadException(
$"Don't know how to convert value type {what.GetFullName()} to reference type {to.GetFullName()}",
node);
}
ld(false).Box(what);
}
else if (to.IsValueType && !what.IsValueType)
{
if (!(what.Namespace == "System" && what.Name == "Object"))
{
throw new XamlLoadException(
$"Don't know how to convert reference type {what.GetFullName()} to value type {to.GetFullName()}",
node);
}
ld(false).Unbox_Any(to);
}
else
{
if (to.IsAssignableFrom(what))
{
// Downcast, always safe
ld(false);
}
else if (what.IsInterface || what.IsAssignableFrom(to))
{
// Upcast or cast from interface, might throw InvalidCastException
ld(false).Emit(OpCodes.Castclass, to);
}
else
{
// Types are completely unrelated, e. g. string to List<int> conversion attempt
throw new XamlLoadException(
$"Don't know how to convert reference type {what.GetFullName()} to reference type {to.GetFullName()}",
node);
}
}
}