public override bool Define()
{
if (!base.Define())
{
return(false);
}
MetaType[] required_modifier = null;
if ((ModFlags & Modifiers.VOLATILE) != 0)
{
var mod = Module.PredefinedTypes.IsVolatile.Resolve();
if (mod != null)
{
required_modifier = new MetaType[] { mod.GetMetaInfo() }
}
;
}
FieldBuilder = Parent.TypeBuilder.DefineField(
Name, member_type.GetMetaInfo(), required_modifier, null, ModifiersExtensions.FieldAttr(ModFlags));
spec = new FieldSpec(Parent.Definition, this, MemberType, FieldBuilder, ModFlags);
//
// Don't cache inaccessible fields except for struct where we
// need them for definitive assignment checks
//
if ((ModFlags & Modifiers.BACKING_FIELD) == 0 || Parent.Kind == MemberKind.Struct)
{
Parent.MemberCache.AddMember(spec);
}
if (initializer != null)
{
Parent.RegisterFieldForInitialization(this, new FieldInitializer(this, initializer, TypeExpression.Location));
}
if (declarators != null)
{
foreach (var d in declarators)
{
var t = new TypeExpression(MemberType, d.Name.Location);
var f = new Field(Parent, t, ModFlags, new MemberName(d.Name.Value, d.Name.Location), OptAttributes);
if (d.Initializer != null)
{
f.initializer = d.Initializer;
}
f.Define();
Parent.PartialContainer.Members.Add(f);
}
}
return(true);
}
protected override Expression DoResolve(ResolveContext ec)
{
var expr = base.DoResolve(ec);
if (expr == null)
{
return(null);
}
if (ec.IsInProbingMode)
{
return(expr);
}
//
// Cache any static delegate creation
//
if (method_group.InstanceExpression != null)
{
return(expr);
}
//
// Cannot easily cache types with MVAR
//
if (ContainsMethodTypeParameter(type))
{
return(expr);
}
if (ContainsMethodTypeParameter(method_group.BestCandidate.DeclaringType))
{
return(expr);
}
//
// Create type level cache for a delegate instance
//
var parent = ec.CurrentMemberDefinition.Parent.PartialContainer;
int id = parent.MethodGroupsCounter++;
mg_cache = new Field(parent, new TypeExpression(type, loc),
Modifiers.STATIC | Modifiers.PRIVATE | Modifiers.COMPILER_GENERATED,
new MemberName(CompilerGeneratedContainer.MakeName(null, "f", "mg$cache", id), loc), null);
mg_cache.Define();
parent.AddField(mg_cache);
return(expr);
}
public override bool Define ()
{
if (!base.Define ())
return false;
MetaType[] required_modifier = null;
if ((ModFlags & Modifiers.VOLATILE) != 0) {
var mod = Module.PredefinedTypes.IsVolatile.Resolve ();
if (mod != null)
required_modifier = new MetaType[] { mod.GetMetaInfo () };
}
FieldBuilder = Parent.TypeBuilder.DefineField (
Name, member_type.GetMetaInfo (), required_modifier, null, ModifiersExtensions.FieldAttr (ModFlags));
spec = new FieldSpec (Parent.Definition, this, MemberType, FieldBuilder, ModFlags);
//
// Don't cache inaccessible fields except for struct where we
// need them for definitive assignment checks
//
if ((ModFlags & Modifiers.BACKING_FIELD) == 0 || Parent.Kind == MemberKind.Struct) {
Parent.MemberCache.AddMember (spec);
}
if (initializer != null) {
Parent.RegisterFieldForInitialization (this, new FieldInitializer (this, initializer, TypeExpression.Location));
}
if (declarators != null) {
foreach (var d in declarators) {
var t = new TypeExpression (MemberType, d.Name.Location);
var f = new Field (Parent, t, ModFlags, new MemberName (d.Name.Value, d.Name.Location), OptAttributes);
if (d.Initializer != null)
f.initializer = d.Initializer;
f.Define ();
Parent.PartialContainer.Members.Add (f);
}
}
return true;
}
public override bool Define()
{
var mod_flags_src = ModFlags;
if (!base.Define ())
return false;
if (declarators != null) {
if ((mod_flags_src & Modifiers.DEFAULT_ACCESS_MODIFER) != 0)
mod_flags_src &= ~(Modifiers.AccessibilityMask | Modifiers.DEFAULT_ACCESS_MODIFER);
var t = new TypeExpression (MemberType, TypeExpression.Location);
foreach (var d in declarators) {
var ef = new EventField (Parent, t, mod_flags_src, new MemberName (d.Name.Value, d.Name.Location), OptAttributes);
if (d.Initializer != null)
ef.initializer = d.Initializer;
ef.Define ();
Parent.PartialContainer.Members.Add (ef);
}
}
if (!HasBackingField) {
SetIsUsed ();
return true;
}
if (Add.IsInterfaceImplementation)
SetIsUsed ();
backing_field = new Field (Parent,
new TypeExpression (MemberType, Location),
Modifiers.BACKING_FIELD | Modifiers.COMPILER_GENERATED | Modifiers.PRIVATE | (ModFlags & (Modifiers.STATIC | Modifiers.UNSAFE)),
MemberName, null);
Parent.PartialContainer.Members.Add (backing_field);
backing_field.Initializer = Initializer;
backing_field.ModFlags &= ~Modifiers.COMPILER_GENERATED;
// Call define because we passed fields definition
backing_field.Define ();
// Set backing field for event fields
spec.BackingField = backing_field.Spec;
return true;
}
public override void Emit (EmitContext ec)
{
//
// Use same anonymous method implementation for scenarios where same
// code is used from multiple blocks, e.g. field initializers
//
if (method == null) {
//
// Delay an anonymous method definition to avoid emitting unused code
// for unreachable blocks or expression trees
//
method = DoCreateMethodHost (ec);
method.Define ();
}
bool is_static = (method.ModFlags & Modifiers.STATIC) != 0;
if (is_static && am_cache == null) {
//
// Creates a field cache to store delegate instance if it's not generic
//
if (!method.MemberName.IsGeneric) {
var parent = method.Parent.PartialContainer;
int id = parent.AnonymousMethodsCounter++;
var cache_type = storey != null && storey.Mutator != null ? storey.Mutator.Mutate (type) : type;
am_cache = new Field (parent, new TypeExpression (cache_type, loc),
Modifiers.STATIC | Modifiers.PRIVATE | Modifiers.COMPILER_GENERATED,
new MemberName (CompilerGeneratedContainer.MakeName (null, "f", "am$cache", id), loc), null);
am_cache.Define ();
parent.AddField (am_cache);
} else {
// TODO: Implement caching of generated generic static methods
//
// Idea:
//
// Some extra class is needed to capture variable generic type
// arguments. Maybe we could re-use anonymous types, with a unique
// anonymous method id, but they are quite heavy.
//
// Consider : "() => typeof(T);"
//
// We need something like
// static class Wrap<Tn, Tm, DelegateType> {
// public static DelegateType cache;
// }
//
// We then specialize local variable to capture all generic parameters
// and delegate type, e.g. "Wrap<Ta, Tb, DelegateTypeInst> cache;"
//
}
}
Label l_initialized = ec.DefineLabel ();
if (am_cache != null) {
ec.Emit (OpCodes.Ldsfld, am_cache.Spec);
ec.Emit (OpCodes.Brtrue_S, l_initialized);
}
//
// Load method delegate implementation
//
if (is_static) {
ec.EmitNull ();
} else if (storey != null) {
Expression e = storey.GetStoreyInstanceExpression (ec).Resolve (new ResolveContext (ec.MemberContext));
if (e != null) {
e.Emit (ec);
}
} else {
ec.EmitThis ();
//
// Special case for value type storey where this is not lifted but
// droped off to parent class
//
for (var b = Block.Parent; b != null; b = b.Parent) {
if (b.ParametersBlock.StateMachine != null) {
ec.Emit (OpCodes.Ldfld, b.ParametersBlock.StateMachine.HoistedThis.Field.Spec);
break;
}
}
}
var delegate_method = method.Spec;
if (storey != null && storey.MemberName.IsGeneric) {
TypeSpec t = storey.Instance.Type;
//
// Mutate anonymous method instance type if we are in nested
// hoisted generic anonymous method storey
//
if (ec.IsAnonymousStoreyMutateRequired) {
t = storey.Mutator.Mutate (t);
}
ec.Emit (OpCodes.Ldftn, TypeBuilder.GetMethod (t.GetMetaInfo (), (MethodInfo) delegate_method.GetMetaInfo ()));
} else {
if (delegate_method.IsGeneric)
delegate_method = delegate_method.MakeGenericMethod (ec.MemberContext, method.TypeParameters);
ec.Emit (OpCodes.Ldftn, delegate_method);
}
var constructor_method = Delegate.GetConstructor (type);
ec.Emit (OpCodes.Newobj, constructor_method);
if (am_cache != null) {
ec.Emit (OpCodes.Stsfld, am_cache.Spec);
ec.MarkLabel (l_initialized);
ec.Emit (OpCodes.Ldsfld, am_cache.Spec);
}
}