public virtual void Visit (Field f)
{
}
public override void Visit(Field f)
{
var location = LocationsBag.GetMemberLocation(f);
FieldDeclaration newField = new FieldDeclaration ();
AddAttributeSection (newField, f);
AddModifiers (newField, location);
newField.AddChild (ConvertToType (f.TypeExpression), Roles.Type);
VariableInitializer variable = new VariableInitializer ();
variable.AddChild (Identifier.Create (f.MemberName.Name, Convert (f.MemberName.Location)), Roles.Identifier);
int locationIdx = 0;
if (f.Initializer != null) {
if (location != null)
variable.AddChild (new CSharpTokenNode (Convert (location [locationIdx++]), Roles.Assign), Roles.Assign);
variable.AddChild ((Expression)f.Initializer.Accept (this), Roles.Expression);
}
newField.AddChild (variable, Roles.Variable);
if (f.Declarators != null) {
foreach (var decl in f.Declarators) {
var declLoc = LocationsBag.GetLocations (decl);
if (declLoc != null)
newField.AddChild (new CSharpTokenNode (Convert (declLoc [0]), Roles.Comma), Roles.Comma);
variable = new VariableInitializer ();
variable.AddChild (Identifier.Create (decl.Name.Value, Convert (decl.Name.Location)), Roles.Identifier);
if (decl.Initializer != null) {
if (declLoc != null)
variable.AddChild (new CSharpTokenNode (Convert (declLoc [1]), Roles.Assign), Roles.Assign);
variable.AddChild ((Expression)decl.Initializer.Accept (this), Roles.Expression);
}
newField.AddChild (variable, Roles.Variable);
}
}
if (location != null &&location.Count > locationIdx)
newField.AddChild (new CSharpTokenNode (Convert (location [locationIdx++]), Roles.Semicolon), Roles.Semicolon);
typeStack.Peek ().AddChild (newField, Roles.TypeMemberRole);
}
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 HoistedEvaluatorVariable (Field field)
: base (null, field)
{
}
public HoistedThis (AnonymousMethodStorey storey, Field field)
: base (storey, field)
{
}
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 HoistedVariable (AnonymousMethodStorey storey, Field field)
{
this.storey = storey;
this.field = field;
}
protected Field AddCompilerGeneratedField (string name, FullNamedExpression type, bool privateAccess)
{
Modifiers mod = Modifiers.COMPILER_GENERATED | (privateAccess ? Modifiers.PRIVATE : Modifiers.INTERNAL);
Field f = new Field (this, type, mod, new MemberName (name, Location), null);
AddField (f);
return f;
}
public static AnonymousTypeClass Create (TypeContainer parent, IList<AnonymousTypeParameter> parameters, Location loc)
{
string name = ClassNamePrefix + parent.Module.CounterAnonymousTypes++;
ParametersCompiled all_parameters;
TypeParameters tparams = null;
SimpleName[] t_args;
if (parameters.Count == 0) {
all_parameters = ParametersCompiled.EmptyReadOnlyParameters;
t_args = null;
} else {
t_args = new SimpleName[parameters.Count];
tparams = new TypeParameters ();
Parameter[] ctor_params = new Parameter[parameters.Count];
for (int i = 0; i < parameters.Count; ++i) {
AnonymousTypeParameter p = parameters[i];
for (int ii = 0; ii < i; ++ii) {
if (parameters[ii].Name == p.Name) {
parent.Compiler.Report.Error (833, parameters[ii].Location,
"`{0}': An anonymous type cannot have multiple properties with the same name",
p.Name);
p = new AnonymousTypeParameter (null, "$" + i.ToString (), p.Location);
parameters[i] = p;
break;
}
}
t_args[i] = new SimpleName ("<" + p.Name + ">__T", p.Location);
tparams.Add (new TypeParameter (i, new MemberName (t_args[i].Name, p.Location), null, null, Variance.None));
ctor_params[i] = new Parameter (t_args[i], p.Name, Parameter.Modifier.NONE, null, p.Location);
}
all_parameters = new ParametersCompiled (ctor_params);
}
//
// Create generic anonymous type host with generic arguments
// named upon properties names
//
AnonymousTypeClass a_type = new AnonymousTypeClass (parent.Module, new MemberName (name, tparams, loc), parameters, loc);
Constructor c = new Constructor (a_type, name, Modifiers.PUBLIC | Modifiers.DEBUGGER_HIDDEN,
null, all_parameters, loc);
c.Block = new ToplevelBlock (parent.Module.Compiler, c.ParameterInfo, loc);
//
// Create fields and constructor body with field initialization
//
bool error = false;
for (int i = 0; i < parameters.Count; ++i) {
AnonymousTypeParameter p = parameters [i];
Field f = new Field (a_type, t_args [i], Modifiers.PRIVATE | Modifiers.READONLY | Modifiers.DEBUGGER_HIDDEN,
new MemberName ("<" + p.Name + ">", p.Location), null);
if (!a_type.AddField (f)) {
error = true;
continue;
}
c.Block.AddStatement (new StatementExpression (
new SimpleAssign (new MemberAccess (new This (p.Location), f.Name),
c.Block.GetParameterReference (i, p.Location))));
ToplevelBlock get_block = new ToplevelBlock (parent.Module.Compiler, p.Location);
get_block.AddStatement (new Return (
new MemberAccess (new This (p.Location), f.Name), p.Location));
Property prop = new Property (a_type, t_args [i], Modifiers.PUBLIC,
new MemberName (p.Name, p.Location), null);
prop.Get = new Property.GetMethod (prop, 0, null, p.Location);
prop.Get.Block = get_block;
a_type.AddMember (prop);
}
if (error)
return null;
a_type.AddConstructor (c);
return a_type;
}
public StoreyFieldPair (AnonymousMethodStorey storey, Field field)
{
this.Storey = storey;
this.Field = field;
}
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);
}
}
