public override bool Resolve(BlockContext bc)
{
if (!CheckContext(bc, loc))
{
return(false);
}
if (bc.HasAny(ResolveContext.Options.TryWithCatchScope))
{
bc.Report.Error(1626, loc, "Cannot yield a value in the body of a try block with a catch clause");
}
if (bc.HasSet(ResolveContext.Options.CatchScope))
{
bc.Report.Error(1631, loc, "Cannot yield a value in the body of a catch clause");
}
if (!base.Resolve(bc))
{
return(false);
}
var otype = bc.CurrentIterator.OriginalIteratorType;
if (expr.Type != otype)
{
expr = Convert.ImplicitConversionRequired(bc, expr, otype, loc);
if (expr == null)
{
return(false);
}
}
return(true);
}
public string [] GetCompletions(string input, out string prefix)
{
prefix = "";
if (input == null || input.Length == 0)
{
return(null);
}
lock (evaluator_lock){
if (!inited)
{
Init();
}
bool partial_input;
CSharpParser parser = ParseString(ParseMode.GetCompletions, input, out partial_input);
if (parser == null)
{
return(null);
}
Class host = parser.InteractiveResult;
var base_class_imported = importer.ImportType(base_class);
var baseclass_list = new List <FullNamedExpression> (1)
{
new TypeExpression(base_class_imported, host.Location)
};
host.SetBaseTypes(baseclass_list);
#if NET_4_0
var access = AssemblyBuilderAccess.RunAndCollect;
#else
var access = AssemblyBuilderAccess.Run;
#endif
var a = new AssemblyDefinitionDynamic(module, "completions");
a.Create(AppDomain.CurrentDomain, access);
module.SetDeclaringAssembly(a);
// Need to setup MemberCache
host.CreateContainer();
// Need to setup base type
host.DefineContainer();
var method = host.Members[0] as Method;
BlockContext bc = new BlockContext(method, method.Block, ctx.BuiltinTypes.Void);
try {
method.Block.Resolve(bc, method);
} catch (CompletionResult cr) {
prefix = cr.BaseText;
return(cr.Result);
}
}
return(null);
}
public static VariableInfo Create(BlockContext bc, Parameter parameter)
{
var info = new VariableInfo(parameter.Name, parameter.Type, bc.AssignmentInfoOffset, bc)
{
IsParameter = true
};
bc.AssignmentInfoOffset += info.Length;
return(info);
}
public FieldInitializerContext(IMemberContext mc, BlockContext constructorContext)
: base(mc, null, constructorContext.ReturnType)
{
flags |= Options.FieldInitializerScope | Options.ConstructorScope;
this.ctor_block = constructorContext.CurrentBlock.Explicit;
if (ctor_block.IsCompilerGenerated)
{
CurrentBlock = ctor_block;
}
}
public override bool Resolve(BlockContext bc)
{
expr = expr.Resolve(bc);
if (expr == null)
{
return(false);
}
machine_initializer = bc.CurrentAnonymousMethod as T;
inside_try_block = bc.CurrentTryBlock;
return(true);
}
protected virtual BlockContext CreateBlockContext(BlockContext bc)
{
var ctx = new BlockContext(bc, block, bc.ReturnType);
ctx.CurrentAnonymousMethod = this;
ctx.AssignmentInfoOffset = bc.AssignmentInfoOffset;
ctx.EnclosingLoop = bc.EnclosingLoop;
ctx.EnclosingLoopOrSwitch = bc.EnclosingLoopOrSwitch;
ctx.Switch = bc.Switch;
return(ctx);
}
public override bool Resolve(BlockContext ec)
{
TypeExpression storey_type_expr = new TypeExpression(host.Definition, loc);
List <Expression> init = null;
if (host.hoisted_this != null)
{
init = new List <Expression> (host.hoisted_params == null ? 1 : host.HoistedParameters.Count + 1);
HoistedThis ht = host.hoisted_this;
FieldExpr from = new FieldExpr(ht.Field, loc);
from.InstanceExpression = new CompilerGeneratedThis(ec.CurrentType, loc);
init.Add(new ElementInitializer(ht.Field.Name, from, loc));
}
if (host.hoisted_params != null)
{
if (init == null)
{
init = new List <Expression> (host.HoistedParameters.Count);
}
for (int i = 0; i < host.hoisted_params.Count; ++i)
{
HoistedParameter hp = host.hoisted_params [i];
HoistedParameter hp_cp = host.hoisted_params_copy [i] ?? hp;
FieldExpr from = new FieldExpr(hp_cp.Field, loc);
from.InstanceExpression = new CompilerGeneratedThis(ec.CurrentType, loc);
init.Add(new ElementInitializer(hp.Field.Name, from, loc));
}
}
if (init != null)
{
new_storey = new NewInitialize(storey_type_expr, null,
new CollectionOrObjectInitializers(init, loc), loc);
}
else
{
new_storey = new New(storey_type_expr, null, loc);
}
new_storey = new_storey.Resolve(ec);
if (new_storey != null)
{
new_storey = Convert.ImplicitConversionRequired(ec, new_storey, host_method.MemberType, loc);
}
return(true);
}
protected override BlockContext CreateBlockContext(BlockContext bc)
{
var ctx = base.CreateBlockContext(bc);
var am = bc.CurrentAnonymousMethod as AnonymousMethodBody;
if (am != null)
{
return_inference = am.ReturnTypeInference;
}
ctx.Set(ResolveContext.Options.TryScope);
return(ctx);
}
public static bool CheckContext(BlockContext bc, Location loc)
{
if (!bc.CurrentAnonymousMethod.IsIterator)
{
bc.Report.Error(1621, loc,
"The yield statement cannot be used inside anonymous method blocks");
return(false);
}
if (bc.HasSet(ResolveContext.Options.FinallyScope))
{
bc.Report.Error(1625, loc, "Cannot yield in the body of a finally clause");
return(false);
}
return(true);
}
public override Expression CreateExpressionTree(ResolveContext ec)
{
BlockContext bc = new BlockContext(ec.MemberContext, Block, ReturnType);
Expression args = parameters.CreateExpressionTree(bc, loc);
Expression expr = Block.CreateExpressionTree(ec);
if (expr == null)
{
return(null);
}
Arguments arguments = new Arguments(2);
arguments.Add(new Argument(expr));
arguments.Add(new Argument(args));
return(CreateExpressionFactoryCall(ec, "Lambda",
new TypeArguments(new TypeExpression(type, loc)),
arguments));
}
protected override Expression CreateExpressionTree (ResolveContext ec, TypeSpec delegate_type)
{
if (ec.IsInProbingMode)
return this;
BlockContext bc = new BlockContext (ec.MemberContext, ec.ConstructorBlock, ec.BuiltinTypes.Void) {
CurrentAnonymousMethod = ec.CurrentAnonymousMethod
};
Expression args = Parameters.CreateExpressionTree (bc, loc);
Expression expr = Block.CreateExpressionTree (ec);
if (expr == null)
return null;
Arguments arguments = new Arguments (2);
arguments.Add (new Argument (expr));
arguments.Add (new Argument (args));
return CreateExpressionFactoryCall (ec, "Lambda",
new TypeArguments (new TypeExpression (delegate_type, loc)),
arguments);
}
protected override bool DoResolve(BlockContext ec)
{
//
// When delegate returns void, only expression statements can be used
//
if (ec.ReturnType.Kind == MemberKind.Void)
{
Expr = Expr.Resolve(ec);
if (Expr == null)
{
return(false);
}
statement = Expr as ExpressionStatement;
if (statement == null)
{
Expr.Error_InvalidExpressionStatement(ec);
}
return(true);
}
return(base.DoResolve(ec));
}
//
// Emits the code
//
public void Emit (TypeDefinition parent)
{
DefineOverride (parent);
method.ParameterInfo.ApplyAttributes (method, MethodBuilder);
ToplevelBlock block = method.Block;
if (block != null) {
BlockContext bc = new BlockContext (method, block, method.ReturnType);
if (block.Resolve (bc, method)) {
debug_builder = member.Parent.CreateMethodSymbolEntry ();
EmitContext ec = method.CreateEmitContext (MethodBuilder.GetILGenerator (), debug_builder);
block.Emit (ec);
}
}
}
//
// Emits the code
//
public override void Emit ()
{
if (Parent.PartialContainer.IsComImport) {
if (!IsDefault ()) {
Report.Error (669, Location, "`{0}': A class with the ComImport attribute cannot have a user-defined constructor",
Parent.GetSignatureForError ());
}
// Set as internal implementation and reset block data
// to ensure no IL is generated
ConstructorBuilder.SetImplementationFlags (MethodImplAttributes.InternalCall);
block = null;
}
if ((ModFlags & Modifiers.DEBUGGER_HIDDEN) != 0)
Module.PredefinedAttributes.DebuggerHidden.EmitAttribute (ConstructorBuilder);
if (OptAttributes != null)
OptAttributes.Emit ();
base.Emit ();
parameters.ApplyAttributes (this, ConstructorBuilder);
BlockContext bc = new BlockContext (this, block, Compiler.BuiltinTypes.Void);
bc.Set (ResolveContext.Options.ConstructorScope);
if (block != null) {
if (!IsStatic && Initializer == null && Parent.PartialContainer.Kind == MemberKind.Struct) {
//
// If this is a non-static `struct' constructor and doesn't have any
// initializer, it must initialize all of the struct's fields.
//
block.AddThisVariable (bc);
}
//
// If we use a "this (...)" constructor initializer, then
// do not emit field initializers, they are initialized in the other constructor
//
if (!(Initializer is ConstructorThisInitializer))
Parent.PartialContainer.ResolveFieldInitializers (bc);
if (!IsStatic) {
if (Initializer == null && Parent.PartialContainer.Kind == MemberKind.Class) {
Initializer = new GeneratedBaseInitializer (Location, null);
}
if (Initializer != null) {
//
// mdb format does not support reqions. Try to workaround this by emitting the
// sequence point at initializer. Any breakpoint at constructor header should
// be adjusted to this sequence point as it's the next one which follows.
//
block.AddScopeStatement (new StatementExpression (Initializer));
}
}
if (block.Resolve (bc, this)) {
debug_builder = Parent.CreateMethodSymbolEntry ();
EmitContext ec = new EmitContext (this, ConstructorBuilder.GetILGenerator (), bc.ReturnType, debug_builder);
ec.With (EmitContext.Options.ConstructorScope, true);
block.Emit (ec);
}
}
if (declarative_security != null) {
foreach (var de in declarative_security) {
#if STATIC
ConstructorBuilder.__AddDeclarativeSecurity (de);
#else
ConstructorBuilder.AddDeclarativeSecurity (de.Key, de.Value);
#endif
}
}
block = null;
}
public static VariableInfo Create (BlockContext bc, Parameter parameter)
{
var info = new VariableInfo (parameter.Name, parameter.Type, bc.AssignmentInfoOffset, bc) {
IsParameter = true
};
bc.AssignmentInfoOffset += info.Length;
return info;
}
protected override bool DoResolve (BlockContext ec)
{
//
// When delegate returns void, only expression statements can be used
//
if (ec.ReturnType.Kind == MemberKind.Void) {
Expr = Expr.Resolve (ec);
if (Expr == null)
return false;
statement = Expr as ExpressionStatement;
if (statement == null)
Expr.Error_InvalidExpressionStatement (ec);
return true;
}
return base.DoResolve (ec);
}
public FieldInitializerContext (IMemberContext mc, BlockContext constructorContext)
: base (mc, null, constructorContext.ReturnType)
{
flags |= Options.FieldInitializerScope | Options.ConstructorScope;
this.ctor_block = constructorContext.CurrentBlock.Explicit;
if (ctor_block.IsCompilerGenerated)
CurrentBlock = ctor_block;
}
public override bool Resolve(BlockContext ec)
{
return(true);
}
public ExpressionStatement CreateExpressionTreeVariable (BlockContext ec)
{
if ((modFlags & Modifier.RefOutMask) != 0)
ec.Report.Error (1951, Location, "An expression tree parameter cannot use `ref' or `out' modifier");
expr_tree_variable = TemporaryVariableReference.Create (ResolveParameterExpressionType (ec, Location).Type, ec.CurrentBlock.ParametersBlock, Location);
expr_tree_variable = (TemporaryVariableReference) expr_tree_variable.Resolve (ec);
Arguments arguments = new Arguments (2);
arguments.Add (new Argument (new TypeOf (parameter_type, Location)));
arguments.Add (new Argument (new StringConstant (ec.BuiltinTypes, Name, Location)));
return new SimpleAssign (ExpressionTreeVariableReference (),
Expression.CreateExpressionFactoryCall (ec, "Parameter", null, arguments, Location));
}
protected override bool DoResolve(BlockContext bc)
{
iterator = bc.CurrentIterator;
return(Yield.CheckContext(bc, loc));
}
public AnonymousExpression Compatible (ResolveContext ec, AnonymousExpression ae)
{
if (block.Resolved)
return this;
// TODO: Implement clone
BlockContext aec = new BlockContext (ec, block, ReturnType);
aec.CurrentAnonymousMethod = ae;
var am = this as AnonymousMethodBody;
if (ec.HasSet (ResolveContext.Options.InferReturnType) && am != null) {
am.ReturnTypeInference = new TypeInferenceContext ();
}
var bc = ec as BlockContext;
if (bc != null) {
aec.AssignmentInfoOffset = bc.AssignmentInfoOffset;
aec.EnclosingLoop = bc.EnclosingLoop;
aec.EnclosingLoopOrSwitch = bc.EnclosingLoopOrSwitch;
aec.Switch = bc.Switch;
}
var errors = ec.Report.Errors;
bool res = Block.Resolve (aec);
if (res && errors == ec.Report.Errors) {
MarkReachable (new Reachability ());
if (!CheckReachableExit (ec.Report)) {
return null;
}
if (bc != null)
bc.AssignmentInfoOffset = aec.AssignmentInfoOffset;
}
if (am != null && am.ReturnTypeInference != null) {
am.ReturnTypeInference.FixAllTypes (ec);
ReturnType = am.ReturnTypeInference.InferredTypeArguments [0];
am.ReturnTypeInference = null;
//
// If e is synchronous the inferred return type is T
// If e is asynchronous and the body of F is either an expression classified as nothing
// or a statement block where no return statements have expressions, the inferred return type is Task
// If e is async and has an inferred result type T, the inferred return type is Task<T>
//
if (block.IsAsync && ReturnType != null) {
ReturnType = ReturnType.Kind == MemberKind.Void ?
ec.Module.PredefinedTypes.Task.TypeSpec :
ec.Module.PredefinedTypes.TaskGeneric.TypeSpec.MakeGenericType (ec, new [] { ReturnType });
}
}
if (res && errors != ec.Report.Errors)
return null;
return res ? this : null;
}
protected void EmitCall (EmitContext ec, Expression binder, Arguments arguments, bool isStatement)
{
//
// This method generates all internal infrastructure for a dynamic call. The
// reason why it's quite complicated is the mixture of dynamic and anonymous
// methods. Dynamic itself requires a temporary class (ContainerX) and anonymous
// methods can generate temporary storey as well (AnonStorey). Handling MVAR
// type parameters rewrite is non-trivial in such case as there are various
// combinations possible therefore the mutator is not straightforward. Secondly
// we need to keep both MVAR(possibly VAR for anon storey) and type VAR to emit
// correct Site field type and its access from EmitContext.
//
int dyn_args_count = arguments == null ? 0 : arguments.Count;
int default_args = isStatement ? 1 : 2;
var module = ec.Module;
bool has_ref_out_argument = false;
var targs = new TypeExpression[dyn_args_count + default_args];
targs[0] = new TypeExpression (module.PredefinedTypes.CallSite.TypeSpec, loc);
TypeExpression[] targs_for_instance = null;
TypeParameterMutator mutator;
var site_container = ec.CreateDynamicSite ();
if (context_mvars != null) {
TypeParameters tparam;
TypeContainer sc = site_container;
do {
tparam = sc.CurrentTypeParameters;
sc = sc.Parent;
} while (tparam == null);
mutator = new TypeParameterMutator (context_mvars, tparam);
if (!ec.IsAnonymousStoreyMutateRequired) {
targs_for_instance = new TypeExpression[targs.Length];
targs_for_instance[0] = targs[0];
}
} else {
mutator = null;
}
for (int i = 0; i < dyn_args_count; ++i) {
Argument a = arguments[i];
if (a.ArgType == Argument.AType.Out || a.ArgType == Argument.AType.Ref)
has_ref_out_argument = true;
var t = a.Type;
// Convert any internal type like dynamic or null to object
if (t.Kind == MemberKind.InternalCompilerType)
t = ec.BuiltinTypes.Object;
if (targs_for_instance != null)
targs_for_instance[i + 1] = new TypeExpression (t, loc);
if (mutator != null)
t = t.Mutate (mutator);
targs[i + 1] = new TypeExpression (t, loc);
}
TypeExpr del_type = null;
TypeExpr del_type_instance_access = null;
if (!has_ref_out_argument) {
string d_name = isStatement ? "Action" : "Func";
TypeSpec te = null;
Namespace type_ns = module.GlobalRootNamespace.GetNamespace ("System", true);
if (type_ns != null) {
te = type_ns.LookupType (module, d_name, dyn_args_count + default_args, LookupMode.Normal, loc);
}
if (te != null) {
if (!isStatement) {
var t = type;
if (t.Kind == MemberKind.InternalCompilerType)
t = ec.BuiltinTypes.Object;
if (targs_for_instance != null)
targs_for_instance[targs_for_instance.Length - 1] = new TypeExpression (t, loc);
if (mutator != null)
t = t.Mutate (mutator);
targs[targs.Length - 1] = new TypeExpression (t, loc);
}
del_type = new GenericTypeExpr (te, new TypeArguments (targs), loc);
if (targs_for_instance != null)
del_type_instance_access = new GenericTypeExpr (te, new TypeArguments (targs_for_instance), loc);
else
del_type_instance_access = del_type;
}
}
//
// Create custom delegate when no appropriate predefined delegate has been found
//
Delegate d;
if (del_type == null) {
TypeSpec rt = isStatement ? ec.BuiltinTypes.Void : type;
Parameter[] p = new Parameter[dyn_args_count + 1];
p[0] = new Parameter (targs[0], "p0", Parameter.Modifier.NONE, null, loc);
var site = ec.CreateDynamicSite ();
int index = site.Containers == null ? 0 : site.Containers.Count;
if (mutator != null)
rt = mutator.Mutate (rt);
for (int i = 1; i < dyn_args_count + 1; ++i) {
p[i] = new Parameter (targs[i], "p" + i.ToString ("X"), arguments[i - 1].Modifier, null, loc);
}
d = new Delegate (site, new TypeExpression (rt, loc),
Modifiers.INTERNAL | Modifiers.COMPILER_GENERATED,
new MemberName ("Container" + index.ToString ("X")),
new ParametersCompiled (p), null);
d.CreateContainer ();
d.DefineContainer ();
d.Define ();
d.PrepareEmit ();
site.AddTypeContainer (d);
//
// Add new container to inflated site container when the
// member cache already exists
//
if (site.CurrentType is InflatedTypeSpec && index > 0)
site.CurrentType.MemberCache.AddMember (d.CurrentType);
del_type = new TypeExpression (d.CurrentType, loc);
if (targs_for_instance != null) {
del_type_instance_access = null;
} else {
del_type_instance_access = del_type;
}
} else {
d = null;
}
var site_type_decl = new GenericTypeExpr (module.PredefinedTypes.CallSiteGeneric.TypeSpec, new TypeArguments (del_type), loc);
var field = site_container.CreateCallSiteField (site_type_decl, loc);
if (field == null)
return;
if (del_type_instance_access == null) {
var dt = d.CurrentType.DeclaringType.MakeGenericType (module, context_mvars.Types);
del_type_instance_access = new TypeExpression (MemberCache.GetMember (dt, d.CurrentType), loc);
}
var instanceAccessExprType = new GenericTypeExpr (module.PredefinedTypes.CallSiteGeneric.TypeSpec,
new TypeArguments (del_type_instance_access), loc);
if (instanceAccessExprType.ResolveAsType (ec.MemberContext) == null)
return;
bool inflate_using_mvar = context_mvars != null && ec.IsAnonymousStoreyMutateRequired;
TypeSpec gt;
if (inflate_using_mvar || context_mvars == null) {
gt = site_container.CurrentType;
} else {
gt = site_container.CurrentType.MakeGenericType (module, context_mvars.Types);
}
// When site container already exists the inflated version has to be
// updated manually to contain newly created field
if (gt is InflatedTypeSpec && site_container.AnonymousMethodsCounter > 1) {
var tparams = gt.MemberDefinition.TypeParametersCount > 0 ? gt.MemberDefinition.TypeParameters : TypeParameterSpec.EmptyTypes;
var inflator = new TypeParameterInflator (module, gt, tparams, gt.TypeArguments);
gt.MemberCache.AddMember (field.InflateMember (inflator));
}
FieldExpr site_field_expr = new FieldExpr (MemberCache.GetMember (gt, field), loc);
BlockContext bc = new BlockContext (ec.MemberContext, null, ec.BuiltinTypes.Void);
Arguments args = new Arguments (1);
args.Add (new Argument (binder));
StatementExpression s = new StatementExpression (new SimpleAssign (site_field_expr, new Invocation (new MemberAccess (instanceAccessExprType, "Create"), args)));
using (ec.With (BuilderContext.Options.OmitDebugInfo, true)) {
if (s.Resolve (bc)) {
Statement init = new If (new Binary (Binary.Operator.Equality, site_field_expr, new NullLiteral (loc)), s, loc);
init.Emit (ec);
}
args = new Arguments (1 + dyn_args_count);
args.Add (new Argument (site_field_expr));
if (arguments != null) {
int arg_pos = 1;
foreach (Argument a in arguments) {
if (a is NamedArgument) {
// Name is not valid in this context
args.Add (new Argument (a.Expr, a.ArgType));
} else {
args.Add (a);
}
if (inflate_using_mvar && a.Type != targs[arg_pos].Type)
a.Expr.Type = targs[arg_pos].Type;
++arg_pos;
}
}
Expression target = new DelegateInvocation (new MemberAccess (site_field_expr, "Target", loc).Resolve (bc), args, false, loc).Resolve (bc);
if (target != null)
target.Emit (ec);
}
}
public string [] GetCompletions (string input, out string prefix)
{
prefix = "";
if (input == null || input.Length == 0)
return null;
lock (evaluator_lock){
if (!inited)
Init ();
bool partial_input;
CSharpParser parser = ParseString (ParseMode.GetCompletions, input, out partial_input);
if (parser == null){
return null;
}
Class host = parser.InteractiveResult;
var base_class_imported = importer.ImportType (base_class);
var baseclass_list = new List<FullNamedExpression> (1) {
new TypeExpression (base_class_imported, host.Location)
};
host.SetBaseTypes (baseclass_list);
#if NET_4_0
var access = AssemblyBuilderAccess.RunAndCollect;
#else
var access = AssemblyBuilderAccess.Run;
#endif
var a = new AssemblyDefinitionDynamic (module, "completions");
a.Create (AppDomain.CurrentDomain, access);
module.SetDeclaringAssembly (a);
// Need to setup MemberCache
host.CreateContainer ();
// Need to setup base type
host.DefineContainer ();
var method = host.Members[0] as Method;
BlockContext bc = new BlockContext (method, method.Block, ctx.BuiltinTypes.Void);
try {
method.Block.Resolve (bc, method);
} catch (CompletionResult cr) {
prefix = cr.BaseText;
return cr.Result;
}
}
return null;
}
public static VariableInfo Create (BlockContext bc, LocalVariable variable)
{
var info = new VariableInfo (variable.Name, variable.Type, bc.AssignmentInfoOffset, bc);
bc.AssignmentInfoOffset += info.Length;
return info;
}
protected void EmitCall(EmitContext ec, Expression binder, Arguments arguments, bool isStatement)
{
//
// This method generates all internal infrastructure for a dynamic call. The
// reason why it's quite complicated is the mixture of dynamic and anonymous
// methods. Dynamic itself requires a temporary class (ContainerX) and anonymous
// methods can generate temporary storey as well (AnonStorey). Handling MVAR
// type parameters rewrite is non-trivial in such case as there are various
// combinations possible therefore the mutator is not straightforward. Secondly
// we need to keep both MVAR(possibly VAR for anon storey) and type VAR to emit
// correct Site field type and its access from EmitContext.
//
int dyn_args_count = arguments == null ? 0 : arguments.Count;
int default_args = isStatement ? 1 : 2;
var module = ec.Module;
bool has_ref_out_argument = false;
var targs = new TypeExpression[dyn_args_count + default_args];
targs[0] = new TypeExpression(module.PredefinedTypes.CallSite.TypeSpec, loc);
TypeExpression[] targs_for_instance = null;
TypeParameterMutator mutator;
var site_container = ec.CreateDynamicSite();
if (context_mvars != null)
{
TypeParameters tparam;
TypeContainer sc = site_container;
do
{
tparam = sc.CurrentTypeParameters;
sc = sc.Parent;
} while (tparam == null);
mutator = new TypeParameterMutator(context_mvars, tparam);
if (!ec.IsAnonymousStoreyMutateRequired)
{
targs_for_instance = new TypeExpression[targs.Length];
targs_for_instance[0] = targs[0];
}
}
else
{
mutator = null;
}
for (int i = 0; i < dyn_args_count; ++i)
{
Argument a = arguments[i];
if (a.ArgType == Argument.AType.Out || a.ArgType == Argument.AType.Ref)
{
has_ref_out_argument = true;
}
var t = a.Type;
// Convert any internal type like dynamic or null to object
if (t.Kind == MemberKind.InternalCompilerType)
{
t = ec.BuiltinTypes.Object;
}
if (targs_for_instance != null)
{
targs_for_instance[i + 1] = new TypeExpression(t, loc);
}
if (mutator != null)
{
t = t.Mutate(mutator);
}
targs[i + 1] = new TypeExpression(t, loc);
}
TypeExpr del_type = null;
TypeExpr del_type_instance_access = null;
if (!has_ref_out_argument)
{
string d_name = isStatement ? "Action" : "Func";
TypeSpec te = null;
Namespace type_ns = module.GlobalRootNamespace.GetNamespace("System", true);
if (type_ns != null)
{
te = type_ns.LookupType(module, d_name, dyn_args_count + default_args, LookupMode.Normal, loc);
}
if (te != null)
{
if (!isStatement)
{
var t = type;
if (t.Kind == MemberKind.InternalCompilerType)
{
t = ec.BuiltinTypes.Object;
}
if (targs_for_instance != null)
{
targs_for_instance[targs_for_instance.Length - 1] = new TypeExpression(t, loc);
}
if (mutator != null)
{
t = t.Mutate(mutator);
}
targs[targs.Length - 1] = new TypeExpression(t, loc);
}
del_type = new GenericTypeExpr(te, new TypeArguments(targs), loc);
if (targs_for_instance != null)
{
del_type_instance_access = new GenericTypeExpr(te, new TypeArguments(targs_for_instance), loc);
}
else
{
del_type_instance_access = del_type;
}
}
}
//
// Create custom delegate when no appropriate predefined delegate has been found
//
Delegate d;
if (del_type == null)
{
TypeSpec rt = isStatement ? ec.BuiltinTypes.Void : type;
Parameter[] p = new Parameter[dyn_args_count + 1];
p[0] = new Parameter(targs[0], "p0", Parameter.Modifier.NONE, null, loc);
var site = ec.CreateDynamicSite();
int index = site.Containers == null ? 0 : site.Containers.Count;
if (mutator != null)
{
rt = mutator.Mutate(rt);
}
for (int i = 1; i < dyn_args_count + 1; ++i)
{
p[i] = new Parameter(targs[i], "p" + i.ToString("X"), arguments[i - 1].Modifier, null, loc);
}
d = new Delegate(site, new TypeExpression(rt, loc),
Modifiers.INTERNAL | Modifiers.COMPILER_GENERATED,
new MemberName("Container" + index.ToString("X")),
new ParametersCompiled(p), null);
d.CreateContainer();
d.DefineContainer();
d.Define();
d.PrepareEmit();
site.AddTypeContainer(d);
//
// Add new container to inflated site container when the
// member cache already exists
//
if (site.CurrentType is InflatedTypeSpec && index > 0)
{
site.CurrentType.MemberCache.AddMember(d.CurrentType);
}
del_type = new TypeExpression(d.CurrentType, loc);
if (targs_for_instance != null)
{
del_type_instance_access = null;
}
else
{
del_type_instance_access = del_type;
}
}
else
{
d = null;
}
var site_type_decl = new GenericTypeExpr(module.PredefinedTypes.CallSiteGeneric.TypeSpec, new TypeArguments(del_type), loc);
var field = site_container.CreateCallSiteField(site_type_decl, loc);
if (field == null)
{
return;
}
if (del_type_instance_access == null)
{
var dt = d.CurrentType.DeclaringType.MakeGenericType(module, context_mvars.Types);
del_type_instance_access = new TypeExpression(MemberCache.GetMember(dt, d.CurrentType), loc);
}
var instanceAccessExprType = new GenericTypeExpr(module.PredefinedTypes.CallSiteGeneric.TypeSpec,
new TypeArguments(del_type_instance_access), loc);
if (instanceAccessExprType.ResolveAsType(ec.MemberContext) == null)
{
return;
}
bool inflate_using_mvar = context_mvars != null && ec.IsAnonymousStoreyMutateRequired;
TypeSpec gt;
if (inflate_using_mvar || context_mvars == null)
{
gt = site_container.CurrentType;
}
else
{
gt = site_container.CurrentType.MakeGenericType(module, context_mvars.Types);
}
// When site container already exists the inflated version has to be
// updated manually to contain newly created field
if (gt is InflatedTypeSpec && site_container.AnonymousMethodsCounter > 1)
{
var tparams = gt.MemberDefinition.TypeParametersCount > 0 ? gt.MemberDefinition.TypeParameters : TypeParameterSpec.EmptyTypes;
var inflator = new TypeParameterInflator(module, gt, tparams, gt.TypeArguments);
gt.MemberCache.AddMember(field.InflateMember(inflator));
}
FieldExpr site_field_expr = new FieldExpr(MemberCache.GetMember(gt, field), loc);
BlockContext bc = new BlockContext(ec.MemberContext, null, ec.BuiltinTypes.Void);
Arguments args = new Arguments(1);
args.Add(new Argument(binder));
StatementExpression s = new StatementExpression(new SimpleAssign(site_field_expr, new Invocation(new MemberAccess(instanceAccessExprType, "Create"), args)));
using (ec.With(BuilderContext.Options.OmitDebugInfo, true)) {
if (s.Resolve(bc))
{
Statement init = new If(new Binary(Binary.Operator.Equality, site_field_expr, new NullLiteral(loc)), s, loc);
init.Emit(ec);
}
args = new Arguments(1 + dyn_args_count);
args.Add(new Argument(site_field_expr));
if (arguments != null)
{
int arg_pos = 1;
foreach (Argument a in arguments)
{
if (a is NamedArgument)
{
// Name is not valid in this context
args.Add(new Argument(a.Expr, a.ArgType));
}
else
{
args.Add(a);
}
if (inflate_using_mvar && a.Type != targs[arg_pos].Type)
{
a.Expr.Type = targs[arg_pos].Type;
}
++arg_pos;
}
}
Expression target = new DelegateInvocation(new MemberAccess(site_field_expr, "Target", loc).Resolve(bc), args, false, loc).Resolve(bc);
if (target != null)
{
target.Emit(ec);
}
}
}
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);
}
type = expr.Type;
Arguments args = new Arguments(0);
//
// 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;
awaiter_definition = bc.Module.GetAwaiter(awaiter_type);
if (!awaiter_definition.IsValidPattern)
{
Error_WrongAwaiterPattern(bc, awaiter_type);
return(false);
}
if (!awaiter_definition.INotifyCompletion)
{
bc.Report.Error(4027, loc, "The awaiter type `{0}' must implement interface `{1}'",
awaiter_type.GetSignatureForError(), bc.Module.PredefinedTypes.INotifyCompletion.GetSignatureForError());
return(false);
}
expr = ama;
result_type = awaiter_definition.GetResult.ReturnType;
return(true);
}
public override Expression CreateExpressionTree (ResolveContext ec)
{
BlockContext bc = new BlockContext (ec.MemberContext, Block, ReturnType);
Expression args = parameters.CreateExpressionTree (bc, loc);
Expression expr = Block.CreateExpressionTree (ec);
if (expr == null)
return null;
Arguments arguments = new Arguments (2);
arguments.Add (new Argument (expr));
arguments.Add (new Argument (args));
return CreateExpressionFactoryCall (ec, "Lambda",
new TypeArguments (new TypeExpression (type, loc)),
arguments);
}
public void ResolveFieldInitializers (BlockContext ec)
{
Debug.Assert (!IsPartialPart);
if (ec.IsStatic) {
if (initialized_static_fields == null)
return;
bool has_complex_initializer = !ec.Module.Compiler.Settings.Optimize;
int i;
ExpressionStatement [] init = new ExpressionStatement [initialized_static_fields.Count];
for (i = 0; i < initialized_static_fields.Count; ++i) {
FieldInitializer fi = initialized_static_fields [i];
ExpressionStatement s = fi.ResolveStatement (ec);
if (s == null) {
s = EmptyExpressionStatement.Instance;
} else if (!fi.IsSideEffectFree) {
has_complex_initializer = true;
}
init [i] = s;
}
for (i = 0; i < initialized_static_fields.Count; ++i) {
FieldInitializer fi = initialized_static_fields [i];
//
// Need special check to not optimize code like this
// static int a = b = 5;
// static int b = 0;
//
if (!has_complex_initializer && fi.IsDefaultInitializer)
continue;
ec.AssignmentInfoOffset += fi.AssignmentOffset;
ec.CurrentBlock.AddScopeStatement (new StatementExpression (init [i]));
}
return;
}
if (initialized_fields == null)
return;
for (int i = 0; i < initialized_fields.Count; ++i) {
FieldInitializer fi = initialized_fields [i];
//
// Clone before resolving otherwise when field initializer is needed
// in more than 1 constructor any resolve after the initial one would
// only took the resolved expression which is problem for expressions
// that generate extra expressions or code during Resolve phase
//
var cloned = fi.Clone (new CloneContext ());
ExpressionStatement s = fi.ResolveStatement (ec);
if (s == null) {
initialized_fields [i] = new FieldInitializer (fi.Field, ErrorExpression.Instance, Location.Null);
continue;
}
//
// Field is re-initialized to its default value => removed
//
if (fi.IsDefaultInitializer && Kind != MemberKind.Struct && ec.Module.Compiler.Settings.Optimize)
continue;
ec.AssignmentInfoOffset += fi.AssignmentOffset;
ec.CurrentBlock.AddScopeStatement (new StatementExpression (s));
initialized_fields [i] = (FieldInitializer) cloned;
}
}
public Expression CreateExpressionTree (BlockContext ec, Location loc)
{
var initializers = new ArrayInitializer (Count, loc);
foreach (Parameter p in FixedParameters) {
//
// Each parameter expression is stored to local variable
// to save some memory when referenced later.
//
StatementExpression se = new StatementExpression (p.CreateExpressionTreeVariable (ec), Location.Null);
if (se.Resolve (ec)) {
ec.CurrentBlock.AddScopeStatement (new TemporaryVariableReference.Declarator (p.ExpressionTreeVariableReference ()));
ec.CurrentBlock.AddScopeStatement (se);
}
initializers.Add (p.ExpressionTreeVariableReference ());
}
return new ArrayCreation (
Parameter.ResolveParameterExpressionType (ec, loc),
initializers, loc);
}
