//
// Return container with awaiter definition. It never returns null
// but all container member can be null for easier error reporting
//
public AwaiterDefinition GetAwaiter(TypeSpec type)
{
AwaiterDefinition awaiter;
if (awaiters.TryGetValue(type, out awaiter))
{
return(awaiter);
}
awaiter = new AwaiterDefinition();
//
// Predefined: bool IsCompleted { get; }
//
awaiter.IsCompleted = MemberCache.FindMember(type, MemberFilter.Property("IsCompleted", Compiler.BuiltinTypes.Bool),
BindingRestriction.InstanceOnly) as PropertySpec;
//
// Predefined: GetResult ()
//
// The method return type is also result type of await expression
//
awaiter.GetResult = MemberCache.FindMember(type, MemberFilter.Method("GetResult", 0,
ParametersCompiled.EmptyReadOnlyParameters, null),
BindingRestriction.InstanceOnly) as MethodSpec;
//
// Predefined: INotifyCompletion.OnCompleted (System.Action)
//
var nc = PredefinedTypes.INotifyCompletion;
awaiter.INotifyCompletion = !nc.Define() || type.ImplementsInterface(nc.TypeSpec, false);
awaiters.Add(type, awaiter);
return(awaiter);
}
public override bool Resolve(BlockContext bc)
{
if (bc.CurrentBlock is Linq.QueryBlock)
{
bc.Report.Error(1995, loc,
"The `await' operator may only be used in a query expression within the first collection expression of the initial `from' clause or within the collection expression of a `join' clause");
return(false);
}
if (!base.Resolve(bc))
{
return(false);
}
Arguments args = new Arguments(0);
type = expr.Type;
//
// The await expression is of dynamic type
//
if (type.BuiltinType == BuiltinTypeSpec.Type.Dynamic)
{
result_type = type;
expr = new Invocation(new MemberAccess(expr, "GetAwaiter"), args).Resolve(bc);
return(true);
}
//
// Check whether the expression is awaitable
//
Expression ama = new AwaitableMemberAccess(expr).Resolve(bc);
if (ama == null)
{
return(false);
}
var errors_printer = new SessionReportPrinter();
var old = bc.Report.SetPrinter(errors_printer);
ama = new Invocation(ama, args).Resolve(bc);
bc.Report.SetPrinter(old);
if (errors_printer.ErrorsCount > 0 || !MemberAccess.IsValidDotExpression(ama.Type))
{
bc.Report.Error(1986, expr.Location,
"The `await' operand type `{0}' must have suitable GetAwaiter method",
expr.Type.GetSignatureForError());
return(false);
}
var awaiter_type = ama.Type;
expr = ama;
//
// Predefined: bool IsCompleted { get; }
//
is_completed = MemberCache.FindMember(awaiter_type, MemberFilter.Property("IsCompleted", bc.Module.Compiler.BuiltinTypes.Bool),
BindingRestriction.InstanceOnly) as PropertySpec;
if (is_completed == null || !is_completed.HasGet)
{
Error_WrongAwaiterPattern(bc, awaiter_type);
return(false);
}
//
// Predefined: GetResult ()
//
// The method return type is also result type of await expression
//
get_result = MemberCache.FindMember(awaiter_type, MemberFilter.Method("GetResult", 0,
ParametersCompiled.EmptyReadOnlyParameters, null),
BindingRestriction.InstanceOnly) as MethodSpec;
if (get_result == null)
{
Error_WrongAwaiterPattern(bc, awaiter_type);
return(false);
}
//
// Predefined: INotifyCompletion.OnCompleted (System.Action)
//
var nc = bc.Module.PredefinedTypes.INotifyCompletion;
if (nc.Define() && !awaiter_type.ImplementsInterface(nc.TypeSpec, false))
{
bc.Report.Error(4027, loc, "The awaiter type `{0}' must implement interface `{1}'",
awaiter_type.GetSignatureForError(), nc.GetSignatureForError());
return(false);
}
result_type = get_result.ReturnType;
return(true);
}
public PredefinedMembers(ModuleContainer module)
{
var types = module.PredefinedTypes;
var atypes = module.PredefinedAttributes;
var btypes = module.Compiler.BuiltinTypes;
ActivatorCreateInstance = new PredefinedMember <MethodSpec> (module, types.Activator,
MemberFilter.Method("CreateInstance", 1, ParametersCompiled.EmptyReadOnlyParameters, null));
AsyncTaskMethodBuilderCreate = new PredefinedMember <MethodSpec> (module, types.AsyncTaskMethodBuilder,
MemberFilter.Method("Create", 0, ParametersCompiled.EmptyReadOnlyParameters, types.AsyncTaskMethodBuilder.TypeSpec));
AsyncTaskMethodBuilderSetResult = new PredefinedMember <MethodSpec> (module, types.AsyncTaskMethodBuilder,
MemberFilter.Method("SetResult", 0, ParametersCompiled.EmptyReadOnlyParameters, btypes.Void));
AsyncTaskMethodBuilderSetException = new PredefinedMember <MethodSpec> (module, types.AsyncTaskMethodBuilder,
MemberFilter.Method("SetException", 0,
ParametersCompiled.CreateFullyResolved(btypes.Exception), btypes.Void));
AsyncTaskMethodBuilderTask = new PredefinedMember <PropertySpec> (module, types.AsyncTaskMethodBuilder,
MemberFilter.Property("Task", null));
AsyncTaskMethodBuilderGenericCreate = new PredefinedMember <MethodSpec> (module, types.AsyncTaskMethodBuilderGeneric,
MemberFilter.Method("Create", 0, ParametersCompiled.EmptyReadOnlyParameters, types.AsyncVoidMethodBuilder.TypeSpec));
AsyncTaskMethodBuilderGenericSetResult = new PredefinedMember <MethodSpec> (module, types.AsyncTaskMethodBuilderGeneric,
"SetResult", MemberKind.Method, () => new TypeSpec[] {
types.AsyncTaskMethodBuilderGeneric.TypeSpec.MemberDefinition.TypeParameters[0]
});
AsyncTaskMethodBuilderGenericSetException = new PredefinedMember <MethodSpec> (module, types.AsyncTaskMethodBuilderGeneric,
MemberFilter.Method("SetException", 0,
ParametersCompiled.CreateFullyResolved(btypes.Exception), btypes.Void));
AsyncTaskMethodBuilderGenericTask = new PredefinedMember <PropertySpec> (module, types.AsyncTaskMethodBuilderGeneric,
MemberFilter.Property("Task", null));
AsyncVoidMethodBuilderCreate = new PredefinedMember <MethodSpec> (module, types.AsyncVoidMethodBuilder,
MemberFilter.Method("Create", 0, ParametersCompiled.EmptyReadOnlyParameters, types.AsyncVoidMethodBuilder.TypeSpec));
AsyncVoidMethodBuilderSetException = new PredefinedMember <MethodSpec> (module, types.AsyncVoidMethodBuilder,
MemberFilter.Method("SetException", 0, null, btypes.Void));
AsyncVoidMethodBuilderSetResult = new PredefinedMember <MethodSpec> (module, types.AsyncVoidMethodBuilder,
MemberFilter.Method("SetResult", 0, ParametersCompiled.EmptyReadOnlyParameters, btypes.Void));
DecimalCtor = new PredefinedMember <MethodSpec> (module, btypes.Decimal,
MemberFilter.Constructor(ParametersCompiled.CreateFullyResolved(
btypes.Int, btypes.Int, btypes.Int, btypes.Bool, btypes.Byte)));
DecimalCtorInt = new PredefinedMember <MethodSpec> (module, btypes.Decimal,
MemberFilter.Constructor(ParametersCompiled.CreateFullyResolved(btypes.Int)));
DecimalCtorLong = new PredefinedMember <MethodSpec> (module, btypes.Decimal,
MemberFilter.Constructor(ParametersCompiled.CreateFullyResolved(btypes.Long)));
DecimalConstantAttributeCtor = new PredefinedMember <MethodSpec> (module, atypes.DecimalConstant,
MemberFilter.Constructor(ParametersCompiled.CreateFullyResolved(
btypes.Byte, btypes.Byte, btypes.UInt, btypes.UInt, btypes.UInt)));
DefaultMemberAttributeCtor = new PredefinedMember <MethodSpec> (module, atypes.DefaultMember,
MemberFilter.Constructor(ParametersCompiled.CreateFullyResolved(btypes.String)));
DelegateCombine = new PredefinedMember <MethodSpec> (module, btypes.Delegate, "Combine", btypes.Delegate, btypes.Delegate);
DelegateRemove = new PredefinedMember <MethodSpec> (module, btypes.Delegate, "Remove", btypes.Delegate, btypes.Delegate);
DelegateEqual = new PredefinedMember <MethodSpec> (module, btypes.Delegate,
new MemberFilter(Operator.GetMetadataName(Operator.OpType.Equality), 0, MemberKind.Operator, null, btypes.Bool));
DelegateInequal = new PredefinedMember <MethodSpec> (module, btypes.Delegate,
new MemberFilter(Operator.GetMetadataName(Operator.OpType.Inequality), 0, MemberKind.Operator, null, btypes.Bool));
DynamicAttributeCtor = new PredefinedMember <MethodSpec> (module, atypes.Dynamic,
MemberFilter.Constructor(ParametersCompiled.CreateFullyResolved(
ArrayContainer.MakeType(module, btypes.Bool))));
FieldInfoGetFieldFromHandle = new PredefinedMember <MethodSpec> (module, types.FieldInfo,
"GetFieldFromHandle", MemberKind.Method, types.RuntimeFieldHandle);
FieldInfoGetFieldFromHandle2 = new PredefinedMember <MethodSpec> (module, types.FieldInfo,
"GetFieldFromHandle", MemberKind.Method, types.RuntimeFieldHandle, new PredefinedType(btypes.RuntimeTypeHandle));
FixedBufferAttributeCtor = new PredefinedMember <MethodSpec> (module, atypes.FixedBuffer,
MemberFilter.Constructor(ParametersCompiled.CreateFullyResolved(btypes.Type, btypes.Int)));
IDisposableDispose = new PredefinedMember <MethodSpec> (module, btypes.IDisposable, "Dispose", TypeSpec.EmptyTypes);
IEnumerableGetEnumerator = new PredefinedMember <MethodSpec> (module, btypes.IEnumerable,
"GetEnumerator", TypeSpec.EmptyTypes);
InterlockedCompareExchange = new PredefinedMember <MethodSpec> (module, types.Interlocked,
MemberFilter.Method("CompareExchange", 0,
new ParametersImported(
new[] {
new ParameterData(null, Parameter.Modifier.REF),
new ParameterData(null, Parameter.Modifier.NONE),
new ParameterData(null, Parameter.Modifier.NONE)
},
new[] {
btypes.Int, btypes.Int, btypes.Int
},
false),
btypes.Int));
InterlockedCompareExchange_T = new PredefinedMember <MethodSpec> (module, types.Interlocked,
MemberFilter.Method("CompareExchange", 1,
new ParametersImported(
new[] {
new ParameterData(null, Parameter.Modifier.REF),
new ParameterData(null, Parameter.Modifier.NONE),
new ParameterData(null, Parameter.Modifier.NONE)
},
new[] {
new TypeParameterSpec(0, null, SpecialConstraint.None, Variance.None, null),
new TypeParameterSpec(0, null, SpecialConstraint.None, Variance.None, null),
new TypeParameterSpec(0, null, SpecialConstraint.None, Variance.None, null),
}, false),
null));
MethodInfoGetMethodFromHandle = new PredefinedMember <MethodSpec> (module, types.MethodBase,
"GetMethodFromHandle", MemberKind.Method, types.RuntimeMethodHandle);
MethodInfoGetMethodFromHandle2 = new PredefinedMember <MethodSpec> (module, types.MethodBase,
"GetMethodFromHandle", MemberKind.Method, types.RuntimeMethodHandle, new PredefinedType(btypes.RuntimeTypeHandle));
MonitorEnter = new PredefinedMember <MethodSpec> (module, types.Monitor, "Enter", btypes.Object);
MonitorEnter_v4 = new PredefinedMember <MethodSpec> (module, types.Monitor,
MemberFilter.Method("Enter", 0,
new ParametersImported(new[] {
new ParameterData(null, Parameter.Modifier.NONE),
new ParameterData(null, Parameter.Modifier.REF)
},
new[] {
btypes.Object, btypes.Bool
}, false), null));
MonitorExit = new PredefinedMember <MethodSpec> (module, types.Monitor, "Exit", btypes.Object);
RuntimeCompatibilityWrapNonExceptionThrows = new PredefinedMember <PropertySpec> (module, atypes.RuntimeCompatibility,
MemberFilter.Property("WrapNonExceptionThrows", btypes.Bool));
RuntimeHelpersInitializeArray = new PredefinedMember <MethodSpec> (module, types.RuntimeHelpers,
"InitializeArray", btypes.Array, btypes.RuntimeFieldHandle);
RuntimeHelpersOffsetToStringData = new PredefinedMember <PropertySpec> (module, types.RuntimeHelpers,
MemberFilter.Property("OffsetToStringData", btypes.Int));
SecurityActionRequestMinimum = new PredefinedMember <ConstSpec> (module, types.SecurityAction, "RequestMinimum",
MemberKind.Field, types.SecurityAction);
StringEmpty = new PredefinedMember <FieldSpec> (module, btypes.String, MemberFilter.Field("Empty", btypes.String));
StringEqual = new PredefinedMember <MethodSpec> (module, btypes.String,
new MemberFilter(Operator.GetMetadataName(Operator.OpType.Equality), 0, MemberKind.Operator, null, btypes.Bool));
StringInequal = new PredefinedMember <MethodSpec> (module, btypes.String,
new MemberFilter(Operator.GetMetadataName(Operator.OpType.Inequality), 0, MemberKind.Operator, null, btypes.Bool));
StructLayoutAttributeCtor = new PredefinedMember <MethodSpec> (module, atypes.StructLayout,
MemberFilter.Constructor(ParametersCompiled.CreateFullyResolved(btypes.Short)));
StructLayoutCharSet = new PredefinedMember <FieldSpec> (module, atypes.StructLayout, "CharSet",
MemberKind.Field, types.CharSet);
StructLayoutSize = new PredefinedMember <FieldSpec> (module, atypes.StructLayout,
MemberFilter.Field("Size", btypes.Int));
TypeGetTypeFromHandle = new PredefinedMember <MethodSpec> (module, btypes.Type, "GetTypeFromHandle", btypes.RuntimeTypeHandle);
}
public override bool Resolve(BlockContext bc)
{
if (!base.Resolve(bc))
{
return(false);
}
Arguments args = new Arguments(0);
type = expr.Type;
//
// The await expression is of dynamic type
//
if (type.BuiltinType == BuiltinTypeSpec.Type.Dynamic)
{
result_type = type;
awaiter = ((AsyncTaskStorey)machine_initializer.Storey).AddAwaiter(type, loc);
expr = new Invocation(new MemberAccess(expr, "GetAwaiter"), args).Resolve(bc);
return(true);
}
//
// Check whether the expression is awaitable
//
Expression ama = new AwaitableMemberAccess(expr).Resolve(bc);
if (ama == null)
{
return(false);
}
var errors_printer = new SessionReportPrinter();
var old = bc.Report.SetPrinter(errors_printer);
ama = new Invocation(ama, args).Resolve(bc);
bc.Report.SetPrinter(old);
if (errors_printer.ErrorsCount > 0 || !MemberAccess.IsValidDotExpression(ama.Type))
{
bc.Report.Error(1986, expr.Location,
"The `await' operand type `{0}' must have suitable GetAwaiter method",
expr.Type.GetSignatureForError());
return(false);
}
var awaiter_type = ama.Type;
awaiter = ((AsyncTaskStorey)machine_initializer.Storey).AddAwaiter(awaiter_type, loc);
expr = ama;
//
// Predefined: bool IsCompleted { get; }
//
is_completed = MemberCache.FindMember(awaiter_type, MemberFilter.Property("IsCompleted", bc.Module.Compiler.BuiltinTypes.Bool),
BindingRestriction.InstanceOnly) as PropertySpec;
if (is_completed == null || !is_completed.HasGet)
{
Error_WrongAwaiterPattern(bc, awaiter_type);
return(false);
}
//
// Predefined: OnCompleted (Action)
//
if (bc.Module.PredefinedTypes.Action.Define())
{
on_completed = MemberCache.FindMember(awaiter_type, MemberFilter.Method("OnCompleted", 0,
ParametersCompiled.CreateFullyResolved(bc.Module.PredefinedTypes.Action.TypeSpec), bc.Module.Compiler.BuiltinTypes.Void),
BindingRestriction.InstanceOnly) as MethodSpec;
if (on_completed == null)
{
Error_WrongAwaiterPattern(bc, awaiter_type);
return(false);
}
}
//
// Predefined: GetResult ()
//
// The method return type is also result type of await expression
//
get_result = MemberCache.FindMember(awaiter_type, MemberFilter.Method("GetResult", 0,
ParametersCompiled.EmptyReadOnlyParameters, null),
BindingRestriction.InstanceOnly) as MethodSpec;
if (get_result == null)
{
Error_WrongAwaiterPattern(bc, awaiter_type);
return(false);
}
result_type = get_result.ReturnType;
return(true);
}
/// <summary>
/// This function tells whether one of our base classes implements
/// the given method (which turns out, it is valid to have an interface
/// implementation in a base
/// </summary>
bool BaseImplements(TypeSpec iface_type, MethodSpec mi, out MethodSpec base_method)
{
base_method = null;
bool base_can_implement = true;
TypeSpec lookup_type;
//
// Special handling for properties/indexers which cannot have accessors
// implementing an interface found in different types (e.g. current and base)
//
if (mi.IsAccessor && container.Interfaces != null)
{
bool new_implementation = false;
foreach (var iface in container.Interfaces)
{
if (TypeSpecComparer.IsEqual(iface, iface_type))
{
new_implementation = true;
break;
}
}
if (new_implementation)
{
MemberFilter filter;
if (mi.Parameters.Count > 1)
{
var indexer_params = mi.Name [0] == 'g' ? mi.Parameters : IndexerSpec.CreateParametersFromSetter(mi, mi.Parameters.Count - 1);
filter = new MemberFilter(MemberCache.IndexerNameAlias, 0, MemberKind.Indexer, indexer_params, null);
}
else
{
var pname = mi.Name.Substring(4);
filter = MemberFilter.Property(pname, null);
}
var prop = MemberCache.FindMember(container.CurrentType, filter, BindingRestriction.DeclaredOnly | BindingRestriction.InstanceOnly);
if (prop != null && (prop.Modifiers & Modifiers.NEW) != 0)
{
base_can_implement = false;
}
}
}
if (base_can_implement)
{
lookup_type = container.BaseType;
if (lookup_type.ImplementsInterface(iface_type, false))
{
return(true);
}
}
else
{
lookup_type = container.CurrentType;
}
//
// Setup filter with no return type to give better error message
// about mismatch at return type when the check bellow rejects them
//
var parameters = mi.Parameters;
MethodSpec close_match = null;
while (true)
{
var candidates = MemberCache.FindMembers(lookup_type, mi.Name, !base_can_implement);
if (candidates == null)
{
base_method = close_match;
return(false);
}
MethodSpec similar_candidate = null;
foreach (var candidate in candidates)
{
if (candidate.Kind != MemberKind.Method)
{
continue;
}
if (candidate.Arity != mi.Arity)
{
continue;
}
var candidate_param = ((MethodSpec)candidate).Parameters;
if (!TypeSpecComparer.Override.IsEqual(parameters.Types, candidate_param.Types))
{
continue;
}
bool modifiers_match = true;
for (int i = 0; i < parameters.Count; ++i)
{
//
// First check exact ref/out match
//
if ((parameters.FixedParameters[i].ModFlags & Parameter.Modifier.RefOutMask) == (candidate_param.FixedParameters[i].ModFlags & Parameter.Modifier.RefOutMask))
{
continue;
}
modifiers_match = false;
//
// Different in ref/out only
//
if ((parameters.FixedParameters[i].ModFlags & Parameter.Modifier.RefOutMask) != (candidate_param.FixedParameters[i].ModFlags & Parameter.Modifier.RefOutMask))
{
if (similar_candidate == null)
{
if (!candidate.IsPublic)
{
break;
}
if (!TypeSpecComparer.Override.IsEqual(mi.ReturnType, ((MethodSpec)candidate).ReturnType))
{
break;
}
// It's used for ref/out ambiguity overload check
similar_candidate = (MethodSpec)candidate;
}
continue;
}
similar_candidate = null;
break;
}
if (!modifiers_match)
{
continue;
}
//
// From this point the candidate is used for detailed error reporting
// because it's very close match to what we are looking for
//
var m = (MethodSpec)candidate;
if (!m.IsPublic)
{
if (close_match == null)
{
close_match = m;
}
continue;
}
if (!TypeSpecComparer.Override.IsEqual(mi.ReturnType, m.ReturnType))
{
if (close_match == null)
{
close_match = m;
}
continue;
}
base_method = m;
if (mi.IsGeneric && !Method.CheckImplementingMethodConstraints(container, m, mi))
{
return(true);
}
}
if (base_method != null)
{
if (similar_candidate != null)
{
Report.SymbolRelatedToPreviousError(similar_candidate);
Report.SymbolRelatedToPreviousError(mi);
Report.SymbolRelatedToPreviousError(container);
Report.Warning(1956, 1, ((MemberCore)base_method.MemberDefinition).Location,
"The interface method `{0}' implementation is ambiguous between following methods: `{1}' and `{2}' in type `{3}'",
mi.GetSignatureForError(), base_method.GetSignatureForError(), similar_candidate.GetSignatureForError(), container.GetSignatureForError());
}
break;
}
if (!base_can_implement)
{
return(false);
}
lookup_type = candidates[0].DeclaringType.BaseType;
if (lookup_type == null)
{
base_method = close_match;
return(false);
}
}
if (!base_method.IsVirtual)
{
#if STATIC
var base_builder = base_method.GetMetaInfo() as MethodBuilder;
if (base_builder != null)
{
//
// We can avoid creating a proxy if base_method can be marked 'final virtual'. This can
// be done for all methods from compiled assembly
//
base_builder.__SetAttributes(base_builder.Attributes | MethodAttributes.Virtual | MethodAttributes.Final | MethodAttributes.NewSlot);
return(true);
}
#endif
DefineProxy(iface_type, base_method, mi);
}
return(true);
}
protected override bool DoDefineMembers()
{
TypeSpec bt;
bool has_task_return_type = false;
var istate_machine = Module.PredefinedTypes.IAsyncStateMachine;
MethodSpec set_statemachine;
if (return_type.IsCustomTaskType())
{
//
// TODO: Would be nice to cache all this on per-type basis
//
var btypes = Compiler.BuiltinTypes;
bt = return_type.MemberDefinition.GetAsyncMethodBuilder();
TypeSpec bt_inflated;
if (return_type.IsGeneric)
{
bt_inflated = bt.MakeGenericType(Module, bt.MemberDefinition.TypeParameters);
}
else
{
bt_inflated = bt;
}
var set_result_sign = MemberFilter.Method("SetResult", 0, ParametersCompiled.CreateFullyResolved(bt.MemberDefinition.TypeParameters), btypes.Void);
set_result = new PredefinedMember <MethodSpec> (Module, bt, set_result_sign).Resolve(Location);
var set_exception_sign = MemberFilter.Method("SetException", 0, ParametersCompiled.CreateFullyResolved(btypes.Exception), btypes.Void);
set_exception = new PredefinedMember <MethodSpec> (Module, bt, set_exception_sign).Resolve(Location);
var builder_factory_sign = MemberFilter.Method("Create", 0, ParametersCompiled.EmptyReadOnlyParameters, bt_inflated);
builder_factory = new PredefinedMember <MethodSpec> (Module, bt, builder_factory_sign).Resolve(Location);
if (builder_factory?.IsStatic == false)
{
throw new NotImplementedException("report better error message");
}
var builder_start_sign = MemberFilter.Method("Start", 1, new ParametersImported(
new [] {
new ParameterData(null, Parameter.Modifier.REF),
},
new [] {
new TypeParameterSpec(0, null, SpecialConstraint.None, Variance.None, null),
}, false),
btypes.Void);
builder_start = new PredefinedMember <MethodSpec> (Module, bt, builder_start_sign).Resolve(Location);
if (!istate_machine.Define())
{
return(false);
}
var set_statemachine_sign = MemberFilter.Method("SetStateMachine", 0, ParametersCompiled.CreateFullyResolved(istate_machine.TypeSpec), btypes.Void);
set_statemachine = new PredefinedMember <MethodSpec> (Module, bt, set_statemachine_sign).Resolve(Location);;
var task_sign = MemberFilter.Property("Task", return_type.MemberDefinition as TypeSpec);
task = new PredefinedMember <PropertySpec> (Module, bt, task_sign).Resolve(Location);
if (set_result == null || set_exception == null || builder_factory == null || builder_start == null || set_statemachine == null || task == null ||
!Module.PredefinedTypes.INotifyCompletion.Define())
{
return(false);
}
has_task_return_type = return_type.IsGeneric;
}
else
{
PredefinedType builder_type;
PredefinedMember <MethodSpec> bf;
PredefinedMember <MethodSpec> bs;
PredefinedMember <MethodSpec> sr;
PredefinedMember <MethodSpec> se;
PredefinedMember <MethodSpec> sm;
var pred_members = Module.PredefinedMembers;
if (return_type.Kind == MemberKind.Void)
{
builder_type = Module.PredefinedTypes.AsyncVoidMethodBuilder;
bf = pred_members.AsyncVoidMethodBuilderCreate;
bs = pred_members.AsyncVoidMethodBuilderStart;
sr = pred_members.AsyncVoidMethodBuilderSetResult;
se = pred_members.AsyncVoidMethodBuilderSetException;
sm = pred_members.AsyncVoidMethodBuilderSetStateMachine;
}
else if (return_type == Module.PredefinedTypes.Task.TypeSpec)
{
builder_type = Module.PredefinedTypes.AsyncTaskMethodBuilder;
bf = pred_members.AsyncTaskMethodBuilderCreate;
bs = pred_members.AsyncTaskMethodBuilderStart;
sr = pred_members.AsyncTaskMethodBuilderSetResult;
se = pred_members.AsyncTaskMethodBuilderSetException;
sm = pred_members.AsyncTaskMethodBuilderSetStateMachine;
task = pred_members.AsyncTaskMethodBuilderTask.Get();
}
else
{
builder_type = Module.PredefinedTypes.AsyncTaskMethodBuilderGeneric;
bf = pred_members.AsyncTaskMethodBuilderGenericCreate;
bs = pred_members.AsyncTaskMethodBuilderGenericStart;
sr = pred_members.AsyncTaskMethodBuilderGenericSetResult;
se = pred_members.AsyncTaskMethodBuilderGenericSetException;
sm = pred_members.AsyncTaskMethodBuilderGenericSetStateMachine;
task = pred_members.AsyncTaskMethodBuilderGenericTask.Get();
has_task_return_type = true;
}
set_result = sr.Get();
set_exception = se.Get();
builder_factory = bf.Get();
builder_start = bs.Get();
set_statemachine = sm.Get();
if (!builder_type.Define() || !istate_machine.Define() || set_result == null || builder_factory == null ||
set_exception == null || set_statemachine == null || builder_start == null ||
!Module.PredefinedTypes.INotifyCompletion.Define())
{
Report.Error(1993, Location,
"Cannot find compiler required types for asynchronous functions support. Are you targeting the wrong framework version?");
return(base.DoDefineMembers());
}
bt = builder_type.TypeSpec;
}
//
// Inflate generic Task types
//
if (has_task_return_type)
{
var task_return_type = return_type.TypeArguments;
if (mutator != null)
{
task_return_type = mutator.Mutate(task_return_type);
}
bt = bt.MakeGenericType(Module, task_return_type);
set_result = MemberCache.GetMember(bt, set_result);
set_exception = MemberCache.GetMember(bt, set_exception);
set_statemachine = MemberCache.GetMember(bt, set_statemachine);
if (task != null)
{
task = MemberCache.GetMember(bt, task);
}
}
builder = AddCompilerGeneratedField("$builder", new TypeExpression(bt, Location));
Field rfield;
if (has_task_return_type && HasAwaitInsideFinally)
{
//
// Special case async block with return value from finally clause. In such case
// we rewrite all return expresison stores to stfld to $return. Instead of treating
// returns outside of finally and inside of finally differently.
//
rfield = AddCompilerGeneratedField("$return", new TypeExpression(bt.TypeArguments [0], Location));
}
else
{
rfield = null;
}
var set_state_machine = new Method(this, new TypeExpression(Compiler.BuiltinTypes.Void, Location),
Modifiers.COMPILER_GENERATED | Modifiers.DEBUGGER_HIDDEN | Modifiers.PUBLIC,
new MemberName("SetStateMachine"),
ParametersCompiled.CreateFullyResolved(
new Parameter(new TypeExpression(istate_machine.TypeSpec, Location), "stateMachine", Parameter.Modifier.NONE, null, Location),
istate_machine.TypeSpec),
null);
ToplevelBlock block = new ToplevelBlock(Compiler, set_state_machine.ParameterInfo, Location);
block.IsCompilerGenerated = true;
set_state_machine.Block = block;
Members.Add(set_state_machine);
if (!base.DoDefineMembers())
{
return(false);
}
//
// Fabricates SetStateMachine method
//
// public void SetStateMachine (IAsyncStateMachine stateMachine)
// {
// $builder.SetStateMachine (stateMachine);
// }
//
var mg = MethodGroupExpr.CreatePredefined(set_statemachine, bt, Location);
mg.InstanceExpression = new FieldExpr(builder, Location);
var param_reference = block.GetParameterReference(0, Location);
param_reference.Type = istate_machine.TypeSpec;
param_reference.eclass = ExprClass.Variable;
var args = new Arguments(1);
args.Add(new Argument(param_reference));
set_state_machine.Block.AddStatement(new StatementExpression(new Invocation(mg, args)));
if (has_task_return_type)
{
if (rfield != null)
{
HoistedReturnValue = new FieldExpr(rfield, Location)
{
InstanceExpression = new CompilerGeneratedThis(CurrentType, Location.Null)
};
}
else
{
HoistedReturnValue = TemporaryVariableReference.Create(bt.TypeArguments [0], StateMachineMethod.Block, Location);
}
}
return(true);
}
public static PropertySpec GetPredefinedProperty(TypeSpec t, string name, Location loc, TypeSpec type)
{
return(GetPredefinedMember(t, MemberFilter.Property(name, type), false, loc) as PropertySpec);
}