public void Emit(IXamlIlEmitter emitter)
{
var so = _parent._config.WellKnownTypes.Object;
var method = _parent._avaloniaObject
.FindMethod(m => m.IsPublic && !m.IsStatic && m.Name == "SetValue"
&&
m.Parameters.Count == 3 &&
m.Parameters[0].Equals(_parent._avaloniaPropertyType) &&
m.Parameters[1].Equals(so) &&
m.Parameters[2].IsEnum
);
if (method == null)
{
throw new XamlIlTypeSystemException(
"Unable to find SetValue(AvaloniaProperty, object, BindingPriority) on AvaloniaObject");
}
using (var loc = emitter.LocalsPool.GetLocal(_parent.PropertyType))
emitter
.Stloc(loc.Local)
.Ldsfld(_parent._field)
.Ldloc(loc.Local);
if (_parent.PropertyType.IsValueType)
{
emitter.Box(_parent.PropertyType);
}
emitter
.Ldc_I4(0)
.EmitCall(method);
}
public XamlIlNodeEmitResult Emit(XamlIlEmitContext context, IXamlIlEmitter codeGen)
{
var exts = context.Configuration.TypeSystem.GetType("Avalonia.Controls.NameScopeExtensions");
var findNameScope = exts.FindMethod(m => m.Name == "FindNameScope");
var registerMethod = findNameScope.ReturnType.FindMethod(m => m.Name == "Register");
using (var targetLoc = context.GetLocal(context.Configuration.WellKnownTypes.Object))
using (var nameScopeLoc = context.GetLocal(findNameScope.ReturnType))
{
var exit = codeGen.DefineLabel();
codeGen
// var target = {pop}
.Stloc(targetLoc.Local)
// var scope = target.FindNameScope()
.Ldloc(targetLoc.Local)
.Castclass(findNameScope.Parameters[0])
.EmitCall(findNameScope)
.Stloc(nameScopeLoc.Local)
// if({scope} != null) goto call;
.Ldloc(nameScopeLoc.Local)
.Brfalse(exit)
.Ldloc(nameScopeLoc.Local);
context.Emit(Value, codeGen, Value.Type.GetClrType());
codeGen
.Ldloc(targetLoc.Local)
.EmitCall(registerMethod)
.MarkLabel(exit);
}
return(XamlIlNodeEmitResult.Void(1));
}
public void Emit(XamlIlEmitContext 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 <XamlIlEmitContext.PooledLocal>();
for (var c = ParametersWithThis.Count - 1; c >= firstCast; c--)
{
codeGen.Castclass(ParametersWithThis[c]);
if (c > firstCast)
{
var l = context.GetLocal(ParametersWithThis[c]);
codeGen.Stloc(l.Local);
locals.Push(l);
}
}
while (locals.Count != 0)
{
using (var l = locals.Pop())
codeGen.Ldloc(l.Local);
}
}
_method.Emit(context, codeGen, swallowResult);
}
public XamlIlNodeEmitResult Emit(IXamlIlAstNode node, XamlIlEmitContext context, IXamlIlEmitter codeGen)
{
if (!(node is XamlIlObjectInitializationNode 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 <XamlIlNeedsParentStackCache>().NeedsParentStack(node);
if (addToParentStack)
{
using (var local = context.GetLocal(init.Type))
codeGen
.Stloc(local.Local)
.Ldloc(context.ContextLocal)
.Ldloc(local.Local)
.EmitCall(context.RuntimeContext.PushParentMethod)
.Ldloc(local.Local);
}
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 override void Emit(IXamlIlEmitter emitter)
{
using (var bloc = emitter.LocalsPool.GetLocal(Types.IBinding))
emitter
.Stloc(bloc.Local)
.Ldsfld(AvaloniaProperty)
.Ldloc(bloc.Local)
// TODO: provide anchor?
.Ldnull();
emitter.EmitCall(Types.AvaloniaObjectBindMethod, true);
}
public void Emit(IXamlIlEmitter emitter)
{
var locals = new Stack <XamlIlLocalsPool.PooledLocal>();
// Save all "setter" parameters
for (var c = Parameters.Count - 1; c >= 0; c--)
{
var loc = emitter.LocalsPool.GetLocal(Parameters[c]);
locals.Push(loc);
emitter.Stloc(loc.Local);
}
emitter.EmitCall(_getter);
while (locals.Count > 0)
{
using (var loc = locals.Pop())
emitter.Ldloc(loc.Local);
}
emitter.EmitCall(_adder, true);
}
public static void EmitConvert(XamlIlEmitContext context, IXamlIlEmitter ilgen, IXamlIlLineInfo node,
IXamlIlType what,
IXamlIlType to)
{
XamlIlLocalsPool.PooledLocal local = null;
EmitConvert(context, node, what, to, lda =>
{
if (!lda)
{
return(ilgen);
}
local = ilgen.LocalsPool.GetLocal(what);
ilgen
.Stloc(local.Local)
.Ldloca(local.Local);
return(ilgen);
});
local?.Dispose();
}
public void EmitCall(IXamlIlEmitter codeGen)
{
int firstCast = -1;
for (var c = Parameters.Count - 1; c >= 0; c--)
{
if (!_baseParametersWithThis[c].Equals(Parameters[c]))
{
firstCast = c;
}
}
if (firstCast != -1)
{
var locals = new Stack <XamlIlLocalsPool.PooledLocal>();
for (var c = Parameters.Count - 1; c >= firstCast; c--)
{
codeGen.Castclass(_baseParametersWithThis[c]);
if (c > firstCast)
{
var l = codeGen.LocalsPool.GetLocal(_baseParametersWithThis[c]);
codeGen.Stloc(l.Local);
locals.Push(l);
}
}
while (locals.Count != 0)
{
using (var l = locals.Pop())
{
codeGen.Ldloc(l.Local);
l.Dispose();
}
}
}
codeGen.EmitCall(_method);
}
public XamlIlNodeEmitResult Emit(XamlIlEmitContext context, IXamlIlEmitter codeGen)
{
var scopeField = context.RuntimeContext.ContextType.Fields.First(f =>
f.Name == AvaloniaXamlIlLanguage.ContextNameScopeFieldName);
using (var targetLoc = context.GetLocal(context.Configuration.WellKnownTypes.Object))
{
codeGen
// var target = {pop}
.Stloc(targetLoc.Local)
// _context.NameScope.Register(Name, target)
.Ldloc(context.ContextLocal)
.Ldfld(scopeField);
context.Emit(Name, codeGen, Name.Type.GetClrType());
codeGen
.Ldloc(targetLoc.Local)
.EmitCall(_types.INameScopeRegister, true);
}
return(XamlIlNodeEmitResult.Void(1));
}
private XamlIlNodeEmitResult EmitCore(IXamlIlAstNode value, IXamlIlEmitter codeGen, IXamlIlType expectedType)
{
CheckingIlEmitter parent = null;
CheckingIlEmitter checkedEmitter = null;
if (EnableIlVerification)
{
parent = codeGen as CheckingIlEmitter;
parent?.Pause();
checkedEmitter = new CheckingIlEmitter(codeGen);
}
#if XAMLIL_DEBUG
var res = EmitNode(value, checkedEmitter);
#else
XamlIlNodeEmitResult res;
try
{
res = EmitNode(value, checkedEmitter ?? codeGen);
}
catch (Exception e) when(!(e is XmlException))
{
throw new XamlIlLoadException(
"Internal compiler error while emitting node " + value + ":\n" + e, value);
}
#endif
if (EnableIlVerification)
{
var expectedBalance = res.ProducedItems - res.ConsumedItems;
var checkResult =
checkedEmitter.Check(res.ProducedItems - res.ConsumedItems, false);
if (checkResult != null)
{
throw new XamlIlLoadException($"Error during IL verification: {checkResult}\n{checkedEmitter}\n",
value);
}
parent?.Resume();
parent?.ExplicitStack(expectedBalance);
}
var returnedType = res.ReturnType;
if (returnedType != null || expectedType != null)
{
if (returnedType != null && expectedType == null)
{
throw new XamlIlLoadException(
$"Emit of node {value} resulted in {returnedType.GetFqn()} while caller expected void", value);
}
if (expectedType != null && returnedType == null)
{
throw new XamlIlLoadException(
$"Emit of node {value} resulted in void while caller expected {expectedType.GetFqn()}", value);
}
if (!returnedType.Equals(expectedType))
{
XamlIlLocalsPool.PooledLocal local = null;
// ReSharper disable once ExpressionIsAlwaysNull
// Value is assigned inside the closure in certain conditions
TypeSystemHelpers.EmitConvert(this, value, returnedType, expectedType, ldaddr =>
{
if (ldaddr && returnedType.IsValueType)
{
// We need to store the value to a temporary variable, since *address*
// is required (probably for method call on the value type)
local = GetLocal(returnedType);
codeGen
.Stloc(local.Local)
.Ldloca(local.Local);
}
// Otherwise do nothing, value is already at the top of the stack
return(codeGen);
});
local?.Dispose();
}
}
return(res);
}
public XamlIlNodeEmitResult Emit(IXamlIlAstNode node, XamlIlEmitContext context, IXamlIlEmitter codeGen)
{
if (!(node is XamlIlObjectInitializationNode 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"));
}
}
IXamlIlType objectListType = null;
var addToParentStack = context.RuntimeContext.ParentListField != null &&
!init.Type.IsValueType &&
context.GetOrCreateItem <XamlIlNeedsParentStackCache>().NeedsParentStack(node);
if (addToParentStack)
{
objectListType = context.Configuration.TypeSystem.GetType("System.Collections.Generic.List`1")
.MakeGenericType(new[] { context.Configuration.WellKnownTypes.Object });
using (var local = context.GetLocal(init.Type))
codeGen
.Stloc(local.Local)
.Ldloc(context.ContextLocal).Ldfld(context.RuntimeContext.ParentListField)
.Ldloc(local.Local)
.EmitCall(objectListType.FindMethod("Add", context.Configuration.WellKnownTypes.Void,
false, context.Configuration.WellKnownTypes.Object))
.Ldloc(local.Local);
}
context.Emit(init.Manipulation, codeGen, null);
if (addToParentStack)
{
codeGen
.Ldloc(context.ContextLocal).Ldfld(context.RuntimeContext.ParentListField)
.Ldloc(context.ContextLocal).Ldfld(context.RuntimeContext.ParentListField)
.EmitCall(objectListType.FindMethod(m => m.Name == "get_Count"))
.Ldc_I4(1).Emit(OpCodes.Sub)
.EmitCall(objectListType.FindMethod(m => m.Name == "RemoveAt"));
}
if (supportsInitialize)
{
codeGen
.EmitCall(supportInitType.FindMethod(m => m.Name == "EndInit"));
}
return(XamlIlNodeEmitResult.Void(1));
}