Act_Unit : Entity_Id);
-- Save current instance on saved environment, to be used to determine
-- the global status of entities in nested instances. Part of Save_Env.
- -- called after verifying that the generic unit is legal for the instance.
+ -- called after verifying that the generic unit is legal for the instance,
+ -- The procedure also examines whether the generic unit is a predefined
+ -- unit, in order to set configuration switches accordingly. As a result
+ -- the procedure must be called after analyzing and freezing the actuals.
procedure Set_Instance_Of (A : Entity_Id; B : Entity_Id);
-- Associate analyzed generic parameter with corresponding
-- indicate the unit to which the Parent_Unit_Visible flag corresponds.
type Instance_Env is record
- Ada_Version : Ada_Version_Type;
- Ada_Version_Explicit : Ada_Version_Type;
Instantiated_Parent : Assoc;
Exchanged_Views : Elist_Id;
Hidden_Entities : Elist_Id;
Current_Sem_Unit : Unit_Number_Type;
Parent_Unit_Visible : Boolean := False;
Instance_Parent_Unit : Entity_Id := Empty;
+ Switches : Config_Switches_Type;
end record;
package Instance_Envs is new Table.Table (
procedure Process_Default (F : Entity_Id) is
Loc : constant Source_Ptr := Sloc (I_Node);
Default : Node_Id;
+ Id : Entity_Id;
begin
- Append (Copy_Generic_Node (F, Empty, True), Assoc);
+ -- Append copy of formal declaration to associations.
+
+ Append (New_Copy_Tree (F), Assoc);
if No (Found_Assoc) then
+ if Nkind (F) = N_Formal_Concrete_Subprogram_Declaration then
+ Id := Defining_Entity (F);
+ else
+ Id := Defining_Identifier (F);
+ end if;
+
Default :=
Make_Generic_Association (Loc,
Selector_Name =>
- New_Occurrence_Of (Defining_Identifier (F), Loc),
+ New_Occurrence_Of (Id, Loc),
Explicit_Generic_Actual_Parameter => Empty);
Set_Box_Present (Default);
Append (Default, Default_Formals);
end loop;
end if;
- Append_To (Assoc,
- Instantiate_Formal_Subprogram
- (Formal, Match, Analyzed_Formal));
+ -- If there is no corresponding actual, this may be case of
+ -- partial parametrization, or else the formal has a default
+ -- or a box.
- if No (Match) then
- if Partial_Parametrization then
- Process_Default (Formal);
+ if No (Match)
+ and then Partial_Parametrization
+ then
+ Process_Default (Formal);
+ else
+ Append_To (Assoc,
+ Instantiate_Formal_Subprogram
+ (Formal, Match, Analyzed_Formal));
+ end if;
- elsif Box_Present (Formal) then
- Append_Elmt
- (Defining_Unit_Name (Specification (Last (Assoc))),
- Default_Actuals);
- end if;
+ -- If this is a nested generic, preserve default for later
+ -- instantiations.
+
+ if No (Match)
+ and then Box_Present (Formal)
+ then
+ Append_Elmt
+ (Defining_Unit_Name (Specification (Last (Assoc))),
+ Default_Actuals);
end if;
when N_Formal_Package_Declaration =>
Assoc);
end if;
- -- For use type and use package appearing in the generic
- -- part, we have already copied them, so we can just
- -- move them where they belong (we mustn't recopy them
- -- since this would mess up the Sloc values).
+ -- For use type and use package appearing in the generic part,
+ -- we have already copied them, so we can just move them where
+ -- they belong (we mustn't recopy them since this would mess up
+ -- the Sloc values).
when N_Use_Package_Clause |
N_Use_Type_Clause =>
end loop;
end;
- -- If this is a formal package. normalize the parameter list by
- -- adding explicit box asssociations for the formals that are covered
- -- by an Others_Choice.
+ -- If this is a formal package. normalize the parameter list by adding
+ -- explicit box asssociations for the formals that are covered by an
+ -- Others_Choice.
if not Is_Empty_List (Default_Formals) then
Append_List (Default_Formals, Formals);
DSS : Node_Id;
begin
- -- Treated like a non-generic array declaration, with
- -- additional semantic checks.
+ -- Treated like a non-generic array declaration, with additional
+ -- semantic checks.
Enter_Name (T);
-- Analyze_Formal_Decimal_Fixed_Point_Type --
---------------------------------------------
- -- As for other generic types, we create a valid type representation
- -- with legal but arbitrary attributes, whose values are never considered
+ -- As for other generic types, we create a valid type representation with
+ -- legal but arbitrary attributes, whose values are never considered
-- static. For all scalar types we introduce an anonymous base type, with
-- the same attributes. We choose the corresponding integer type to be
-- Standard_Integer.
end if;
end if;
- -- If the parent type has a known size, so does the formal, which
- -- makes legal representation clauses that involve the formal.
+ -- If the parent type has a known size, so does the formal, which makes
+ -- legal representation clauses that involve the formal.
Set_Size_Known_At_Compile_Time
(T, Size_Known_At_Compile_Time (Entity (Subtype_Mark (Def))));
-- Analyze_Formal_Discrete_Type --
----------------------------------
- -- The operations defined for a discrete types are those of an
- -- enumeration type. The size is set to an arbitrary value, for use
- -- in analyzing the generic unit.
+ -- The operations defined for a discrete types are those of an enumeration
+ -- type. The size is set to an arbitrary value, for use in analyzing the
+ -- generic unit.
procedure Analyze_Formal_Discrete_Type (T : Entity_Id; Def : Node_Id) is
Loc : constant Source_Ptr := Sloc (Def);
Set_Is_Constrained (T);
-- For semantic analysis, the bounds of the type must be set to some
- -- non-static value. The simplest is to create attribute nodes for
- -- those bounds, that refer to the type itself. These bounds are never
+ -- non-static value. The simplest is to create attribute nodes for those
+ -- bounds, that refer to the type itself. These bounds are never
-- analyzed but serve as place-holders.
Lo :=
Set_Is_Generic_Type (Base);
Set_Scalar_Range (Base, Scalar_Range (T));
Set_Parent (Base, Parent (Def));
-
end Analyze_Formal_Discrete_Type;
----------------------------------
procedure Analyze_Formal_Modular_Type (T : Entity_Id; Def : Node_Id) is
begin
- -- Apart from their entity kind, generic modular types are treated
- -- like signed integer types, and have the same attributes.
+ -- Apart from their entity kind, generic modular types are treated like
+ -- signed integer types, and have the same attributes.
Analyze_Formal_Signed_Integer_Type (T, Def);
Set_Ekind (T, E_Modular_Integer_Subtype);
Explain_Limited_Type (T, N);
end if;
- if Is_Abstract (T) then
+ if Is_Abstract_Type (T) then
Error_Msg_N
("generic formal of mode IN must not be of abstract type", N);
end if;
if Present (E) then
Analyze_Per_Use_Expression (E, T);
+
+ if Is_Limited_Type (T) and then not OK_For_Limited_Init (E) then
+ Error_Msg_N
+ ("initialization not allowed for limited types", E);
+ Explain_Limited_Type (T, E);
+ end if;
end if;
Set_Ekind (Id, K);
-- Case of generic IN OUT parameter
else
- -- If the formal has an unconstrained type, construct its
- -- actual subtype, as is done for subprogram formals. In this
- -- fashion, all its uses can refer to specific bounds.
+ -- If the formal has an unconstrained type, construct its actual
+ -- subtype, as is done for subprogram formals. In this fashion, all
+ -- its uses can refer to specific bounds.
Set_Ekind (Id, K);
Set_Etype (Id, T);
Decl : Node_Id;
begin
- -- Make sure that the actual subtype doesn't generate
- -- bogus freezing.
+ -- Make sure the actual subtype doesn't generate bogus freezing
Set_Must_Not_Freeze (Non_Freezing_Ref);
Decl := Build_Actual_Subtype (T, Non_Freezing_Ref);
New_Internal_Entity
(E_Ordinary_Fixed_Point_Type, Current_Scope, Sloc (Def), 'G');
begin
- -- The semantic attributes are set for completeness only, their
- -- values will never be used, because all properties of the type
- -- are non-static.
+ -- The semantic attributes are set for completeness only, their values
+ -- will never be used, since all properties of the type are non-static.
Enter_Name (T);
Set_Ekind (T, E_Ordinary_Fixed_Point_Subtype);
Formal_Decl : Node_Id;
begin
- -- TBA : for a formal package, need to recurse
+ -- TBA : for a formal package, need to recurse ???
Decls := New_List;
Formal_Decl :=
No_Associations := True;
end if;
- -- If there are no generic associations, the generic parameters
- -- appear as local entities and are instantiated like them. We copy
- -- the generic package declaration as if it were an instantiation,
- -- and analyze it like a regular package, except that we treat the
- -- formals as additional visible components.
+ -- If there are no generic associations, the generic parameters appear
+ -- as local entities and are instantiated like them. We copy the generic
+ -- package declaration as if it were an instantiation, and analyze it
+ -- like a regular package, except that we treat the formals as
+ -- additional visible components.
Gen_Decl := Unit_Declaration_Node (Gen_Unit);
Formal := New_Copy (Pack_Id);
Create_Instantiation_Source (N, Gen_Unit, False, S_Adjustment);
- -- Make local generic without formals. The formals will be replaced
- -- with internal declarations..
+ -- Make local generic without formals. The formals will be replaced with
+ -- internal declarations.
New_N := Build_Local_Package;
Rewrite (N, New_N);
if Is_Child_Unit (Gen_Unit)
and then Parent_Installed
then
- -- Similarly, we have to make the name of the formal visible in
- -- the parent instance, to resolve properly fully qualified names
- -- that may appear in the generic unit. The parent instance has
- -- been placed on the scope stack ahead of the current scope.
+ -- Similarly, we have to make the name of the formal visible in the
+ -- parent instance, to resolve properly fully qualified names that
+ -- may appear in the generic unit. The parent instance has been
+ -- placed on the scope stack ahead of the current scope.
Parent_Instance := Scope_Stack.Table (Scope_Stack.Last - 1).Entity;
Analyze (Specification (N));
-- The formals for which associations are provided are not visible
- -- outside of the formal package. The others are still declared by
- -- a formal parameter declaration.
+ -- outside of the formal package. The others are still declared by a
+ -- formal parameter declaration.
if not No_Associations then
declare
Restore_Env;
- -- Inside the generic unit, the formal package is a regular
- -- package, but no body is needed for it. Note that after
- -- instantiation, the defining_unit_name we need is in the
- -- new tree and not in the original. (see Package_Instantiation).
- -- A generic formal package is an instance, and can be used as
- -- an actual for an inner instance.
+ -- Inside the generic unit, the formal package is a regular package, but
+ -- no body is needed for it. Note that after instantiation, the defining
+ -- unit name we need is in the new tree and not in the original (see
+ -- Package_Instantiation). A generic formal package is an instance, and
+ -- can be used as an actual for an inner instance.
Set_Has_Completion (Formal, True);
Set_Etype (Pack_Id, Standard_Void_Type);
Set_Scope (Pack_Id, Scope (Formal));
Set_Has_Completion (Pack_Id, True);
+
+ -- If there are errors in the parameter list, Analyze_Associations
+ -- raises Instantiation_Error. Patch the declaration to prevent
+ -- further exception propagation.
+
+ exception
+ when Instantiation_Error =>
+
+ Enter_Name (Formal);
+ Set_Ekind (Formal, E_Variable);
+ Set_Etype (Formal, Any_Type);
+
+ if Parent_Installed then
+ Remove_Parent;
+ end if;
end Analyze_Formal_Package;
---------------------------------
Set_Has_Completion (Nam);
if Nkind (N) = N_Formal_Abstract_Subprogram_Declaration then
- Set_Is_Abstract (Nam);
+ Set_Is_Abstract_Subprogram (Nam);
Set_Is_Dispatching_Operation (Nam);
declare
Ctrl_Type : constant Entity_Id := Find_Dispatching_Type (Nam);
-
begin
if No (Ctrl_Type) then
Error_Msg_N
("abstract formal subprogram must have a controlling type",
N);
-
else
Check_Controlling_Formals (Ctrl_Type, Nam);
end if;
Gen_Parm_Decl : Node_Id;
begin
- -- The generic formals are processed in the scope of the generic
- -- unit, where they are immediately visible. The scope is installed
- -- by the caller.
+ -- The generic formals are processed in the scope of the generic unit,
+ -- where they are immediately visible. The scope is installed by the
+ -- caller.
Gen_Parm_Decl := First (Generic_Formal_Declarations (N));
Set_Visible_Declarations (Specification (N), New_List (Renaming));
end if;
- -- Create copy of generic unit, and save for instantiation.
- -- If the unit is a child unit, do not copy the specifications
- -- for the parent, which are not part of the generic tree.
+ -- Create copy of generic unit, and save for instantiation. If the unit
+ -- is a child unit, do not copy the specifications for the parent, which
+ -- are not part of the generic tree.
Save_Parent := Parent_Spec (N);
Set_Parent_Spec (N, Empty);
Set_Categorization_From_Pragmas (N);
Set_Is_Pure (Id, Is_Pure (Current_Scope));
- -- Link the declaration of the generic homonym in the generic copy
- -- to the package it renames, so that it is always resolved properly.
+ -- Link the declaration of the generic homonym in the generic copy to
+ -- the package it renames, so that it is always resolved properly.
Set_Generic_Homonym (Id, Defining_Unit_Name (Renaming));
Set_Entity (Associated_Node (Name (Renaming)), Id);
- -- For a library unit, we have reconstructed the entity for the
- -- unit, and must reset it in the library tables.
+ -- For a library unit, we have reconstructed the entity for the unit,
+ -- and must reset it in the library tables.
if Nkind (Parent (N)) = N_Compilation_Unit then
Set_Cunit_Entity (Current_Sem_Unit, Id);
Analyze_Generic_Formal_Part (N);
- -- After processing the generic formals, analysis proceeds
- -- as for a non-generic package.
+ -- After processing the generic formals, analysis proceeds as for a
+ -- non-generic package.
Analyze (Specification (N));
Save_Parent : Node_Id;
begin
- -- Create copy of generic unit,and save for instantiation.
- -- If the unit is a child unit, do not copy the specifications
- -- for the parent, which are not part of the generic tree.
+ -- Create copy of generic unit,and save for instantiation. If the unit
+ -- is a child unit, do not copy the specifications for the parent, which
+ -- are not part of the generic tree.
Save_Parent := Parent_Spec (N);
Set_Parent_Spec (N, Empty);
return;
else
- Set_Instance_Env (Gen_Unit, Act_Decl_Id);
Gen_Decl := Unit_Declaration_Node (Gen_Unit);
- -- Initialize renamings map, for error checking, and the list
- -- that holds private entities whose views have changed between
- -- generic definition and instantiation. If this is the instance
- -- created to validate an actual package, the instantiation
- -- environment is that of the enclosing instance.
+ -- Initialize renamings map, for error checking, and the list that
+ -- holds private entities whose views have changed between generic
+ -- definition and instantiation. If this is the instance created to
+ -- validate an actual package, the instantiation environment is that
+ -- of the enclosing instance.
Generic_Renamings.Set_Last (0);
Generic_Renamings_HTable.Reset;
Generic_Formal_Declarations (Act_Tree),
Generic_Formal_Declarations (Gen_Decl));
+ Set_Instance_Env (Gen_Unit, Act_Decl_Id);
Set_Defining_Unit_Name (Act_Spec, Act_Decl_Name);
Set_Is_Generic_Instance (Act_Decl_Id);
Set_Generic_Parent (Act_Spec, Gen_Unit);
- -- References to the generic in its own declaration or its body
- -- are references to the instance. Add a renaming declaration for
- -- the generic unit itself. This declaration, as well as the renaming
+ -- References to the generic in its own declaration or its body are
+ -- references to the instance. Add a renaming declaration for the
+ -- generic unit itself. This declaration, as well as the renaming
-- declarations for the generic formals, must remain private to the
-- unit: the formals, because this is the language semantics, and
-- the unit because its use is an artifact of the implementation.
Make_Package_Declaration (Loc,
Specification => Act_Spec);
- -- Save the instantiation node, for subsequent instantiation
- -- of the body, if there is one and we are generating code for
- -- the current unit. Mark the unit as having a body, to avoid
- -- a premature error message.
+ -- Save the instantiation node, for subsequent instantiation of the
+ -- body, if there is one and we are generating code for the current
+ -- unit. Mark the unit as having a body, to avoid a premature error
+ -- message.
-- We instantiate the body if we are generating code, if we are
-- generating cross-reference information, or if we are building
declare
Enclosing_Body_Present : Boolean := False;
- -- If the generic unit is not a compilation unit, then a body
- -- may be present in its parent even if none is required. We
- -- create a tentative pending instantiation for the body, which
- -- will be discarded if none is actually present.
+ -- If the generic unit is not a compilation unit, then a body may
+ -- be present in its parent even if none is required. We create a
+ -- tentative pending instantiation for the body, which will be
+ -- discarded if none is actually present.
Scop : Entity_Id;
-- If front-end inlining is enabled, and this is a unit for which
-- code will be generated, we instantiate the body at once.
+
-- This is done if the instance is not the main unit, and if the
-- generic is not a child unit of another generic, to avoid scope
-- problems and the reinstallation of parent instances.
or else (Operating_Mode = Check_Semantics
and then ASIS_Mode));
- -- If front_end_inlining is enabled, do not instantiate a
- -- body if within a generic context.
+ -- If front_end_inlining is enabled, do not instantiate body if
+ -- within a generic context.
if (Front_End_Inlining
and then not Expander_Active)
TBP : constant Node_Id :=
Get_Task_Body_Procedure
(Enclosing_Master);
-
begin
if Present (TBP) then
Delay_Descriptors (TBP);
Insert_Before (N, Act_Decl);
Analyze (Act_Decl);
- -- For an instantiation that is a compilation unit, place
- -- declaration on current node so context is complete
- -- for analysis (including nested instantiations). It this
- -- is the main unit, the declaration eventually replaces the
- -- instantiation node. If the instance body is later created, it
- -- replaces the instance node, and the declation is attached to
- -- it (see Build_Instance_Compilation_Unit_Nodes).
+ -- For an instantiation that is a compilation unit, place declaration
+ -- on current node so context is complete for analysis (including
+ -- nested instantiations). It this is the main unit, the declaration
+ -- eventually replaces the instantiation node. If the instance body
+ -- is later created, it replaces the instance node, and the declation
+ -- is attached to it (see Build_Instance_Compilation_Unit_Nodes).
else
if Cunit_Entity (Current_Sem_Unit) = Defining_Entity (N) then
Set_Unit (Parent (N), N);
Set_Body_Required (Parent (N), False);
- -- We never need elaboration checks on instantiations, since
- -- by definition, the body instantiation is elaborated at the
- -- same time as the spec instantiation.
+ -- We never need elaboration checks on instantiations, since by
+ -- definition, the body instantiation is elaborated at the same
+ -- time as the spec instantiation.
Set_Suppress_Elaboration_Warnings (Act_Decl_Id);
Set_Kill_Elaboration_Checks (Act_Decl_Id);
Set_First_Private_Entity (Defining_Unit_Name (Unit_Renaming),
First_Private_Entity (Act_Decl_Id));
- -- If the instantiation will receive a body, the unit will
- -- be transformed into a package body, and receive its own
- -- elaboration entity. Otherwise, the nature of the unit is
- -- now a package declaration.
+ -- If the instantiation will receive a body, the unit will be
+ -- transformed into a package body, and receive its own elaboration
+ -- entity. Otherwise, the nature of the unit is now a package
+ -- declaration.
if Nkind (Parent (N)) = N_Compilation_Unit
and then not Needs_Body
Validate_Categorization_Dependency (N, Act_Decl_Id);
- -- Check restriction, but skip this if something went wrong in
- -- the above analysis, indicated by Act_Decl_Id being void.
+ -- Check restriction, but skip this if something went wrong in the above
+ -- analysis, indicated by Act_Decl_Id being void.
if Ekind (Act_Decl_Id) /= E_Void
and then not Is_Library_Level_Entity (Act_Decl_Id)
Inline_Instance_Body (N, Gen_Unit, Act_Decl);
end if;
- -- The following is a tree patch for ASIS: ASIS needs separate nodes
- -- to be used as defining identifiers for a formal package and for the
+ -- The following is a tree patch for ASIS: ASIS needs separate nodes to
+ -- be used as defining identifiers for a formal package and for the
-- corresponding expanded package
if Nkind (N) = N_Formal_Package_Declaration then
then
Removed := True;
- -- Remove entities in current scopes from visibility, so
- -- that instance body is compiled in a clean environment.
+ -- Remove entities in current scopes from visibility, so that
+ -- instance body is compiled in a clean environment.
Save_Scope_Stack (Handle_Use => False);
if Is_Child_Unit (S) then
-- Remove child unit from stack, as well as inner scopes.
- -- Removing the context of a child unit removes parent
- -- units as well.
+ -- Removing the context of a child unit removes parent units
+ -- as well.
while Current_Scope /= S loop
Num_Inner := Num_Inner + 1;
(In_Private_Part (Curr_Scope)
or else In_Package_Body (Curr_Scope))
then
- -- Install private declaration of ancestor units, which
- -- are currently available. Restore_Scope_Stack and
- -- Install_Context only install the visible part of parents.
+ -- Install private declaration of ancestor units, which are
+ -- currently available. Restore_Scope_Stack and Install_Context
+ -- only install the visible part of parents.
declare
Par : Entity_Id;
Renaming_List : List_Id;
procedure Analyze_Instance_And_Renamings;
- -- The instance must be analyzed in a context that includes the
- -- mappings of generic parameters into actuals. We create a package
- -- declaration for this purpose, and a subprogram with an internal
- -- name within the package. The subprogram instance is simply an
- -- alias for the internal subprogram, declared in the current scope.
+ -- The instance must be analyzed in a context that includes the mappings
+ -- of generic parameters into actuals. We create a package declaration
+ -- for this purpose, and a subprogram with an internal name within the
+ -- package. The subprogram instance is simply an alias for the internal
+ -- subprogram, declared in the current scope.
------------------------------------
-- Analyze_Instance_And_Renamings --
begin
if Nkind (Parent (N)) = N_Compilation_Unit then
- -- For the case of a compilation unit, the container package
- -- has the same name as the instantiation, to insure that the
- -- binder calls the elaboration procedure with the right name.
- -- Copy the entity of the instance, which may have compilation
- -- level flags (e.g. Is_Child_Unit) set.
+ -- For the case of a compilation unit, the container package has
+ -- the same name as the instantiation, to insure that the binder
+ -- calls the elaboration procedure with the right name. Copy the
+ -- entity of the instance, which may have compilation level flags
+ -- (e.g. Is_Child_Unit) set.
Pack_Id := New_Copy (Def_Ent);
-- Case of an instantiation that is a compilation unit
- -- Place declaration on current node so context is complete
- -- for analysis (including nested instantiations), and for
- -- use in a context_clause (see Analyze_With_Clause).
+ -- Place declaration on current node so context is complete for
+ -- analysis (including nested instantiations), and for use in a
+ -- context_clause (see Analyze_With_Clause).
else
Set_Unit (Parent (N), Pack_Decl);
Check_Formal_Packages (Pack_Id);
Set_Is_Generic_Instance (Pack_Id, False);
- -- Body of the enclosing package is supplied when instantiating
- -- the subprogram body, after semantic analysis is completed.
+ -- Body of the enclosing package is supplied when instantiating the
+ -- subprogram body, after semantic analysis is completed.
if Nkind (Parent (N)) = N_Compilation_Unit then
Set_Name_Entity_Id (Chars (Pack_Id), Homonym (Pack_Id));
- -- Set name and scope of internal subprogram so that the
- -- proper external name will be generated. The proper scope
- -- is the scope of the wrapper package. We need to generate
- -- debugging information for the internal subprogram, so set
- -- flag accordingly.
+ -- Set name and scope of internal subprogram so that the proper
+ -- external name will be generated. The proper scope is the scope
+ -- of the wrapper package. We need to generate debugging info for
+ -- the internal subprogram, so set flag accordingly.
Set_Chars (Anon_Id, Chars (Defining_Entity (N)));
Set_Scope (Anon_Id, Scope (Pack_Id));
- -- Mark wrapper package as referenced, to avoid spurious
- -- warnings if the instantiation appears in various with_
- -- clauses of subunits of the main unit.
+ -- Mark wrapper package as referenced, to avoid spurious warnings
+ -- if the instantiation appears in various with_ clauses of
+ -- subunits of the main unit.
Set_Referenced (Pack_Id);
end if;
Set_Sloc (Act_Decl_Id, Sloc (Defining_Entity (N)));
Set_Comes_From_Source (Act_Decl_Id, True);
- -- The signature may involve types that are not frozen yet, but
- -- the subprogram will be frozen at the point the wrapper package
- -- is frozen, so it does not need its own freeze node. In fact, if
- -- one is created, it might conflict with the freezing actions from
- -- the wrapper package (see 7206-013).
+ -- The signature may involve types that are not frozen yet, but the
+ -- subprogram will be frozen at the point the wrapper package is
+ -- frozen, so it does not need its own freeze node. In fact, if one
+ -- is created, it might conflict with the freezing actions from the
+ -- wrapper package (see 7206-013).
+
+ -- Should not really reference non-public TN's in comments ???
Set_Has_Delayed_Freeze (Anon_Id, False);
Gen_Decl := Unit_Declaration_Node (Gen_Unit);
- -- The subprogram itself cannot contain a nested instance, so
- -- the current parent is left empty.
-
- Set_Instance_Env (Gen_Unit, Empty);
-
-- Initialize renamings map, for error checking
Generic_Renamings.Set_Last (0);
Generic_Formal_Declarations (Act_Tree),
Generic_Formal_Declarations (Gen_Decl));
- -- Build the subprogram declaration, which does not appear
- -- in the generic template, and give it a sloc consistent
- -- with that of the template.
+ -- The subprogram itself cannot contain a nested instance, so the
+ -- current parent is left empty.
+
+ Set_Instance_Env (Gen_Unit, Empty);
+
+ -- Build the subprogram declaration, which does not appear in the
+ -- generic template, and give it a sloc consistent with that of the
+ -- template.
Set_Defining_Unit_Name (Act_Spec, Anon_Id);
Set_Generic_Parent (Act_Spec, Gen_Unit);
Analyze_Instance_And_Renamings;
-- If the generic is marked Import (Intrinsic), then so is the
- -- instance. This indicates that there is no body to instantiate.
- -- If generic is marked inline, so it the instance, and the
- -- anonymous subprogram it renames. If inlined, or else if inlining
- -- is enabled for the compilation, we generate the instance body
- -- even if it is not within the main unit.
+ -- instance. This indicates that there is no body to instantiate. If
+ -- generic is marked inline, so it the instance, and the anonymous
+ -- subprogram it renames. If inlined, or else if inlining is enabled
+ -- for the compilation, we generate the instance body even if it is
+ -- not within the main unit.
-- Any other pragmas might also be inherited ???
(N, Act_Decl, Expander_Active, Current_Sem_Unit);
Check_Forward_Instantiation (Gen_Decl);
- -- The wrapper package is always delayed, because it does
- -- not constitute a freeze point, but to insure that the
- -- freeze node is placed properly, it is created directly
- -- when instantiating the body (otherwise the freeze node
- -- might appear to early for nested instantiations).
+ -- The wrapper package is always delayed, because it does not
+ -- constitute a freeze point, but to insure that the freeze
+ -- node is placed properly, it is created directly when
+ -- instantiating the body (otherwise the freeze node might
+ -- appear to early for nested instantiations).
elsif Nkind (Parent (N)) = N_Compilation_Unit then
elsif Nkind (Parent (N)) = N_Compilation_Unit then
- -- Replace instance node for library-level instantiations
- -- of intrinsic subprograms, for ASIS use.
+ -- Replace instance node for library-level instantiations of
+ -- intrinsic subprograms, for ASIS use.
Rewrite (N, Unit (Parent (N)));
Set_Unit (Parent (N), N);
return;
end if;
- -- The context clause items on the instantiation, which are now
- -- attached to the body compilation unit (since the body overwrote
- -- the original instantiation node), semantically belong on the spec,
- -- so copy them there. It's harmless to leave them on the body as well.
- -- In fact one could argue that they belong in both places.
+ -- The context clause items on the instantiation, which are now attached
+ -- to the body compilation unit (since the body overwrote the original
+ -- instantiation node), semantically belong on the spec, so copy them
+ -- there. It's harmless to leave them on the body as well. In fact one
+ -- could argue that they belong in both places.
Citem := First (Context_Items (Body_Cunit));
while Present (Citem) loop
Next (Citem);
end loop;
- -- Propagate categorization flags on packages, so that they appear
- -- in ali file for the spec of the unit.
+ -- Propagate categorization flags on packages, so that they appear in
+ -- the ali file for the spec of the unit.
if Ekind (New_Main) = E_Package then
Set_Is_Pure (Old_Main, Is_Pure (New_Main));
Main_Unit_Entity := New_Main;
Set_Cunit_Entity (Main_Unit, Main_Unit_Entity);
- -- Build elaboration entity, since the instance may certainly
- -- generate elaboration code requiring a flag for protection.
+ -- Build elaboration entity, since the instance may certainly generate
+ -- elaboration code requiring a flag for protection.
Build_Elaboration_Entity (Decl_Cunit, New_Main);
end Build_Instance_Compilation_Unit_Nodes;
-----------------------------------
-- If the formal has specific parameters, they must match those of the
- -- actual. Both of them are instances, and the renaming declarations
- -- for their formal parameters appear in the same order in both. The
- -- analyzed formal has been analyzed in the context of the current
- -- instance.
+ -- actual. Both of them are instances, and the renaming declarations for
+ -- their formal parameters appear in the same order in both. The analyzed
+ -- formal has been analyzed in the context of the current instance.
procedure Check_Formal_Package_Instance
(Formal_Pack : Entity_Id;
Expr2 : Node_Id;
procedure Check_Mismatch (B : Boolean);
- -- Common error routine for mismatch between the parameters of
- -- the actual instance and those of the formal package.
+ -- Common error routine for mismatch between the parameters of the
+ -- actual instance and those of the formal package.
function Same_Instantiated_Constant (E1, E2 : Entity_Id) return Boolean;
- -- The formal may come from a nested formal package, and the actual
- -- may have been constant-folded. To determine whether the two denote
- -- the same entity we may have to traverse several definitions to
- -- recover the ultimate entity that they refer to.
+ -- The formal may come from a nested formal package, and the actual may
+ -- have been constant-folded. To determine whether the two denote the
+ -- same entity we may have to traverse several definitions to recover
+ -- the ultimate entity that they refer to.
function Same_Instantiated_Variable (E1, E2 : Entity_Id) return Boolean;
-- Similarly, if the formal comes from a nested formal package, the
exit when Ekind (E1) = E_Package
and then Renamed_Entity (E1) = Renamed_Entity (Actual_Pack);
- if Is_Type (E1) then
+ -- If the formal is the renaming of the formal package, this
+ -- is the end of its formal part, which may occur before the
+ -- end of the formal part in the actual in the presence of
+ -- defaulted parameters in the formal package.
- -- Subtypes must statically match. E1 and E2 are the
- -- local entities that are subtypes of the actuals.
- -- Itypes generated for other parameters need not be checked,
- -- the check will be performed on the parameters themselves.
+ exit when Nkind (Parent (E2)) = N_Package_Renaming_Declaration
+ and then Renamed_Entity (E2) = Scope (E2);
- -- If E2 is a formal type declaration, it is a defaulted
- -- parameter and needs no checking.
+ -- The analysis of the actual may generate additional internal
+ -- entities. If the formal is defaulted, there is no corresponding
+ -- analysis and the internal entities must be skipped, until we
+ -- find corresponding entities again.
+
+ if Comes_From_Source (E2)
+ and then not Comes_From_Source (E1)
+ and then Chars (E1) /= Chars (E2)
+ then
+ while Present (E1)
+ and then Chars (E1) /= Chars (E2)
+ loop
+ Next_Entity (E1);
+ end loop;
+ end if;
+
+ if No (E1) then
+ return;
+
+ -- If the formal entity comes from a formal declaration. it was
+ -- defaulted in the formal package, and no check is needed on it.
+
+ elsif Nkind (Parent (E2)) = N_Formal_Object_Declaration then
+ goto Next_E;
+
+ elsif Is_Type (E1) then
+
+ -- Subtypes must statically match. E1, E2 are the local entities
+ -- that are subtypes of the actuals. Itypes generated for other
+ -- parameters need not be checked, the check will be performed
+ -- on the parameters themselves.
+
+ -- If E2 is a formal type declaration, it is a defaulted parameter
+ -- and needs no checking.
if not Is_Itype (E1)
and then not Is_Itype (E2)
elsif Ekind (E1) = E_Constant then
- -- IN parameters must denote the same static value, or
- -- the same constant, or the literal null.
+ -- IN parameters must denote the same static value, or the same
+ -- constant, or the literal null.
Expr1 := Expression (Parent (E1));
if not Is_Static_Expression (Expr2) then
Check_Mismatch (True);
- elsif Is_Integer_Type (Etype (E1)) then
-
+ elsif Is_Discrete_Type (Etype (E1)) then
declare
V1 : constant Uint := Expr_Value (Expr1);
V2 : constant Uint := Expr_Value (Expr2);
elsif Is_String_Type (Etype (E1))
and then Nkind (Expr1) = N_String_Literal
then
-
if Nkind (Expr2) /= N_String_Literal then
Check_Mismatch (True);
else
elsif Is_Overloadable (E1) then
- -- Verify that the names of the entities match.
- -- Note that actuals that are attributes are rewritten
- -- as subprograms.
+ -- Verify that the names of the entities match. Note that actuals
+ -- that are attributes are rewritten as subprograms.
Check_Mismatch
(Ekind (E2) /= Ekind (E1) or else (Alias (E1)) /= Alias (E2));
Formal_P : Entity_Id;
begin
- -- Iterate through the declarations in the instance, looking for
- -- package renaming declarations that denote instances of formal
- -- packages. Stop when we find the renaming of the current package
- -- itself. The declaration for a formal package without a box is
- -- followed by an internal entity that repeats the instantiation.
+ -- Iterate through the declarations in the instance, looking for package
+ -- renaming declarations that denote instances of formal packages. Stop
+ -- when we find the renaming of the current package itself. The
+ -- declaration for a formal package without a box is followed by an
+ -- internal entity that repeats the instantiation.
E := First_Entity (P_Id);
while Present (E) loop
-- Check_Generic_Actuals --
---------------------------
- -- The visibility of the actuals may be different between the
- -- point of generic instantiation and the instantiation of the body.
+ -- The visibility of the actuals may be different between the point of
+ -- generic instantiation and the instantiation of the body.
procedure Check_Generic_Actuals
(Instance : Entity_Id;
Astype : Entity_Id;
function Denotes_Previous_Actual (Typ : Entity_Id) return Boolean;
- -- For a formal that is an array type, the component type is often
- -- a previous formal in the same unit. The privacy status of the
- -- component type will have been examined earlier in the traversal
- -- of the corresponding actuals, and this status should not be
- -- modified for the array type itself.
+ -- For a formal that is an array type, the component type is often a
+ -- previous formal in the same unit. The privacy status of the component
+ -- type will have been examined earlier in the traversal of the
+ -- corresponding actuals, and this status should not be modified for the
+ -- array type itself.
+ --
-- To detect this case we have to rescan the list of formals, which
-- is usually short enough to ignore the resulting inefficiency.
Set_Is_Potentially_Use_Visible (E,
In_Use (Instance));
- -- We constructed the generic actual type as a subtype of
- -- the supplied type. This means that it normally would not
- -- inherit subtype specific attributes of the actual, which
- -- is wrong for the generic case.
+ -- We constructed the generic actual type as a subtype of the
+ -- supplied type. This means that it normally would not inherit
+ -- subtype specific attributes of the actual, which is wrong for
+ -- the generic case.
Astype := Ancestor_Subtype (E);
if No (Astype) then
- -- can happen when E is an itype that is the full view of
- -- a private type completed, e.g. with a constrained array.
+ -- This can happen when E is an itype that is the full view of
+ -- a private type completed, e.g. with a constrained array. In
+ -- that case, use the first subtype, which will carry size
+ -- information. The base type itself is unconstrained and will
+ -- not carry it.
- Astype := Base_Type (E);
+ Astype := First_Subtype (E);
end if;
Set_Size_Info (E, (Astype));
and then Present
(Generic_Parent (Specification (Instance_Decl)))
then
- -- Check whether the generic we are looking for is a child
- -- of this instance.
+ -- Check whether the generic we are looking for is a child of
+ -- this instance.
E := Find_Generic_Child
(Generic_Parent (Specification (Instance_Decl)), Gen_Id);
-- Start of processing for Check_Generic_Child_Unit
begin
- -- If the name of the generic is given by a selected component, it
- -- may be the name of a generic child unit, and the prefix is the name
- -- of an instance of the parent, in which case the child unit must be
- -- visible. If this instance is not in scope, it must be placed there
- -- and removed after instantiation, because what is being instantiated
- -- is not the original child, but the corresponding child present in
- -- the instance of the parent.
+ -- If the name of the generic is given by a selected component, it may
+ -- be the name of a generic child unit, and the prefix is the name of an
+ -- instance of the parent, in which case the child unit must be visible.
+ -- If this instance is not in scope, it must be placed there and removed
+ -- after instantiation, because what is being instantiated is not the
+ -- original child, but the corresponding child present in the instance
+ -- of the parent.
-- If the child is instantiated within the parent, it can be given by
-- a simple name. In this case the instance is already in scope, but
if Present (Gen_Par) then
- -- The prefix denotes an instantiation. The entity itself
- -- may be a nested generic, or a child unit.
+ -- The prefix denotes an instantiation. The entity itself may be a
+ -- nested generic, or a child unit.
E := Find_Generic_Child (Gen_Par, S);
Set_Is_Instantiated (Inst_Par);
end if;
- -- A common mistake is to replicate the naming scheme of
- -- a hierarchy by instantiating a generic child directly,
- -- rather than the implicit child in a parent instance:
+ -- A common mistake is to replicate the naming scheme of a
+ -- hierarchy by instantiating a generic child directly, rather
+ -- than the implicit child in a parent instance:
-- generic .. package Gpar is ..
-- generic .. package Gpar.Child is ..
-- package Par.Child is new Gpar.Child ();
-- rather than Par.Child
- -- In this case the instantiation is within Par, which is
- -- an instance, but Gpar does not denote Par because we are
- -- not IN the instance of Gpar, so this is illegal. The test
- -- below recognizes this particular case.
+ -- In this case the instantiation is within Par, which is an
+ -- instance, but Gpar does not denote Par because we are not IN
+ -- the instance of Gpar, so this is illegal. The test below
+ -- recognizes this particular case.
if Is_Child_Unit (E)
and then not Comes_From_Source (Entity (Prefix (Gen_Id)))
and then Present (Full_View (T))
and then not In_Open_Scopes (Scope (T))
then
- -- In the generic, the full type was visible. Save the
- -- private entity, for subsequent exchange.
+ -- In the generic, the full type was visible. Save the private
+ -- entity, for subsequent exchange.
Switch_View (T);
Exchange_Declarations (Etype (Get_Associated_Node (N)));
end if;
- -- For composite types with inconsistent representation
- -- exchange component types accordingly.
+ -- For composite types with inconsistent representation exchange
+ -- component types accordingly.
elsif Is_Access_Type (T)
and then Is_Private_Type (Designated_Type (T))
-- must preserve references that were global to the enclosing
-- parent at that point. Other occurrences, whether global or
-- local to the current generic, must be resolved anew, so we
- -- reset the entity in the generic copy. A global reference has
- -- a smaller depth than the parent, or else the same depth in
- -- case both are distinct compilation units.
+ -- reset the entity in the generic copy. A global reference has a
+ -- smaller depth than the parent, or else the same depth in case
+ -- both are distinct compilation units.
-- It is also possible for Current_Instantiated_Parent to be
- -- defined, and for this not to be a nested generic, namely
- -- if the unit is loaded through Rtsfind. In that case, the
- -- entity of New_N is only a link to the associated node, and
- -- not a defining occurrence.
+ -- defined, and for this not to be a nested generic, namely if the
+ -- unit is loaded through Rtsfind. In that case, the entity of
+ -- New_N is only a link to the associated node, and not a defining
+ -- occurrence.
- -- The entities for parent units in the defining_program_unit
- -- of a generic child unit are established when the context of
- -- the unit is first analyzed, before the generic copy is made.
- -- They are preserved in the copy for use in ASIS queries.
+ -- The entities for parent units in the defining_program_unit of a
+ -- generic child unit are established when the context of the unit
+ -- is first analyzed, before the generic copy is made. They are
+ -- preserved in the copy for use in ASIS queries.
Ent := Entity (New_N);
-- Case of instantiating identifier or some other name or operator
else
- -- If the associated node is still defined, the entity in
- -- it is global, and must be copied to the instance.
- -- If this copy is being made for a body to inline, it is
- -- applied to an instantiated tree, and the entity is already
- -- present and must be also preserved.
+ -- If the associated node is still defined, the entity in it is
+ -- global, and must be copied to the instance. If this copy is
+ -- being made for a body to inline, it is applied to an
+ -- instantiated tree, and the entity is already present and must
+ -- be also preserved.
declare
Assoc : constant Node_Id := Get_Associated_Node (N);
and then Expander_Active
then
-- Inlining case: we are copying a tree that contains
- -- global entities, which are preserved in the copy
- -- to be used for subsequent inlining.
+ -- global entities, which are preserved in the copy to be
+ -- used for subsequent inlining.
null;
Subunit => True,
Error_Node => N);
- -- If the proper body is not found, a warning message will
- -- be emitted when analyzing the stub, or later at the the
- -- point of instantiation. Here we just leave the stub as is.
+ -- If the proper body is not found, a warning message will be
+ -- emitted when analyzing the stub, or later at the the point
+ -- of instantiation. Here we just leave the stub as is.
if Unum = No_Unit then
Subunits_Missing := True;
goto Subunit_Not_Found;
end if;
- -- We must create a generic copy of the subunit, in order
- -- to perform semantic analysis on it, and we must replace
- -- the stub in the original generic unit with the subunit,
- -- in order to preserve non-local references within.
+ -- We must create a generic copy of the subunit, in order to
+ -- perform semantic analysis on it, and we must replace the
+ -- stub in the original generic unit with the subunit, in order
+ -- to preserve non-local references within.
-- Only the proper body needs to be copied. Library_Unit and
-- context clause are simply inherited by the generic copy.
-- Note that the copy (which may be recursive if there are
- -- nested subunits) must be done first, before attaching it
- -- to the enclosing generic.
+ -- nested subunits) must be done first, before attaching it to
+ -- the enclosing generic.
New_Body :=
Copy_Generic_Node
(Proper_Body (Unit (Subunit)),
Empty, Instantiating => False);
- -- Now place the original proper body in the original
- -- generic unit. This is a body, not a compilation unit.
+ -- Now place the original proper body in the original generic
+ -- unit. This is a body, not a compilation unit.
Rewrite (N, Proper_Body (Unit (Subunit)));
Set_Is_Compilation_Unit (Defining_Entity (N), False);
Set_Was_Originally_Stub (N);
- -- Finally replace the body of the subunit with its copy,
- -- and make this new subunit into the library unit of the
- -- generic copy, which does not have stubs any longer.
+ -- Finally replace the body of the subunit with its copy, and
+ -- make this new subunit into the library unit of the generic
+ -- copy, which does not have stubs any longer.
Set_Proper_Body (Unit (Subunit), New_Body);
Set_Library_Unit (New_N, Subunit);
end;
-- If we are instantiating, this must be an error case, since
- -- otherwise we would have replaced the stub node by the proper
- -- body that corresponds. So just ignore it in the copy (i.e.
- -- we have copied it, and that is good enough).
+ -- otherwise we would have replaced the stub node by the proper body
+ -- that corresponds. So just ignore it in the copy (i.e. we have
+ -- copied it, and that is good enough).
else
null;
<<Subunit_Not_Found>> null;
- -- If the node is a compilation unit, it is the subunit of a stub,
- -- which has been loaded already (see code below). In this case,
- -- the library unit field of N points to the parent unit (which
- -- is a compilation unit) and need not (and cannot!) be copied.
+ -- If the node is a compilation unit, it is the subunit of a stub, which
+ -- has been loaded already (see code below). In this case, the library
+ -- unit field of N points to the parent unit (which is a compilation
+ -- unit) and need not (and cannot!) be copied.
- -- When the proper body of the stub is analyzed, thie library_unit
- -- link is used to establish the proper context (see sem_ch10).
+ -- When the proper body of the stub is analyzed, thie library_unit link
+ -- is used to establish the proper context (see sem_ch10).
-- The other fields of a compilation unit are copied as usual
elsif Nkind (N) = N_Compilation_Unit then
- -- This code can only be executed when not instantiating, because
- -- in the copy made for an instantiation, the compilation unit
- -- node has disappeared at the point that a stub is replaced by
- -- its proper body.
+ -- This code can only be executed when not instantiating, because in
+ -- the copy made for an instantiation, the compilation unit node has
+ -- disappeared at the point that a stub is replaced by its proper
+ -- body.
pragma Assert (not Instantiating);
begin
if Present (T) then
+
-- Retrieve the allocator node in the generic copy
Acc_T := Etype (Parent (Parent (T)));
-- For a proper body, we must catch the case of a proper body that
-- replaces a stub. This represents the point at which a separate
- -- compilation unit, and hence template file, may be referenced, so
- -- we must make a new source instantiation entry for the template
- -- of the subunit, and ensure that all nodes in the subunit are
- -- adjusted using this new source instantiation entry.
+ -- compilation unit, and hence template file, may be referenced, so we
+ -- must make a new source instantiation entry for the template of the
+ -- subunit, and ensure that all nodes in the subunit are adjusted using
+ -- this new source instantiation entry.
elsif Nkind (N) in N_Proper_Body then
declare
S_Adjustment := Save_Adjustment;
end;
- -- Don't copy Ident or Comment pragmas, since the comment belongs
- -- to the generic unit, not to the instantiating unit.
+ -- Don't copy Ident or Comment pragmas, since the comment belongs to the
+ -- generic unit, not to the instantiating unit.
elsif Nkind (N) = N_Pragma
and then Instantiating
return False;
else
- -- Check whether this package is associated with a formal
- -- package of the enclosing instantiation. Iterate over the
- -- list of renamings.
+ -- Check whether this package is associated with a formal package of
+ -- the enclosing instantiation. Iterate over the list of renamings.
E := First_Entity (Par);
while Present (E) loop
procedure End_Generic is
begin
- -- ??? More things could be factored out in this
- -- routine. Should probably be done at a later stage.
+ -- ??? More things could be factored out in this routine. Should
+ -- probably be done at a later stage.
Inside_A_Generic := Generic_Flags.Table (Generic_Flags.Last);
Generic_Flags.Decrement_Last;
-- Start of processing of Freeze_Subprogram_Body
begin
- -- If the instance and the generic body appear within the same
- -- unit, and the instance preceeds the generic, the freeze node for
- -- the instance must appear after that of the generic. If the generic
- -- is nested within another instance I2, then current instance must
- -- be frozen after I2. In both cases, the freeze nodes are those of
- -- enclosing packages. Otherwise, the freeze node is placed at the end
- -- of the current declarative part.
+ -- If the instance and the generic body appear within the same unit, and
+ -- the instance preceeds the generic, the freeze node for the instance
+ -- must appear after that of the generic. If the generic is nested
+ -- within another instance I2, then current instance must be frozen
+ -- after I2. In both cases, the freeze nodes are those of enclosing
+ -- packages. Otherwise, the freeze node is placed at the end of the
+ -- current declarative part.
Enc_G := Enclosing_Body (Gen_Body);
Enc_I := Enclosing_Body (Inst_Node);
then
if ABE_Is_Certain (Get_Package_Instantiation_Node (Par)) then
- -- The parent was a premature instantiation. Insert freeze
- -- node at the end the current declarative part.
+ -- The parent was a premature instantiation. Insert freeze node at
+ -- the end the current declarative part.
Insert_After_Last_Decl (Inst_Node, F_Node);
Insert_After (Freeze_Node (Par), F_Node);
end if;
- -- The body enclosing the instance should be frozen after the body
- -- that includes the generic, because the body of the instance may
- -- make references to entities therein. If the two are not in the
- -- same declarative part, or if the one enclosing the instance is
- -- frozen already, freeze the instance at the end of the current
- -- declarative part.
+ -- The body enclosing the instance should be frozen after the body that
+ -- includes the generic, because the body of the instance may make
+ -- references to entities therein. If the two are not in the same
+ -- declarative part, or if the one enclosing the instance is frozen
+ -- already, freeze the instance at the end of the current declarative
+ -- part.
elsif Is_Generic_Instance (Par)
and then Present (Freeze_Node (Par))
-- Freeze package that encloses instance, and place node after
-- package that encloses generic. If enclosing package is already
- -- frozen we have to assume it is at the proper place. This may
- -- be a potential ABE that requires dynamic checking.
+ -- frozen we have to assume it is at the proper place. This may be
+ -- a potential ABE that requires dynamic checking.
Insert_After_Last_Decl (Enc_G, Package_Freeze_Node (Enc_I));
Insert_After_Last_Decl (Inst_Node, F_Node);
else
- -- If none of the above, insert freeze node at the end of the
- -- current declarative part.
+ -- If none of the above, insert freeze node at the end of the current
+ -- declarative part.
Insert_After_Last_Decl (Inst_Node, F_Node);
end if;
if Res /= Assoc_Null then
return Generic_Renamings.Table (Res).Act_Id;
else
- -- On exit, entity is not instantiated: not a generic parameter,
- -- or else parameter of an inner generic unit.
+ -- On exit, entity is not instantiated: not a generic parameter, or
+ -- else parameter of an inner generic unit.
return A;
end if;
end if;
end if;
- -- If the instantiation is a compilation unit that does not need a
- -- body then the instantiation node has been rewritten as a package
+ -- If the instantiation is a compilation unit that does not need body
+ -- then the instantiation node has been rewritten as a package
-- declaration for the instance, and we return the original node.
-- If it is a compilation unit and the instance node has not been
- -- rewritten, then it is still the unit of the compilation. Finally,
- -- if a body is present, this is a parent of the main unit whose body
- -- has been compiled for inlining purposes, and the instantiation node
- -- has been rewritten with the instance body.
+ -- rewritten, then it is still the unit of the compilation. Finally, if
+ -- a body is present, this is a parent of the main unit whose body has
+ -- been compiled for inlining purposes, and the instantiation node has
+ -- been rewritten with the instance body.
- -- Otherwise the instantiation node appears after the declaration.
- -- If the entity is a formal package, the declaration may have been
- -- rewritten as a generic declaration (in the case of a formal with a
- -- box) or left as a formal package declaration if it has actuals, and
- -- is found with a forward search.
+ -- Otherwise the instantiation node appears after the declaration. If
+ -- the entity is a formal package, the declaration may have been
+ -- rewritten as a generic declaration (in the case of a formal with box)
+ -- or left as a formal package declaration if it has actuals, and is
+ -- found with a forward search.
if Nkind (Parent (Decl)) = N_Compilation_Unit then
if Nkind (Decl) = N_Package_Declaration
------------------------
function Has_Been_Exchanged (E : Entity_Id) return Boolean is
- Next : Elmt_Id := First_Elmt (Exchanged_Views);
+ Next : Elmt_Id;
begin
+ Next := First_Elmt (Exchanged_Views);
while Present (Next) loop
if Full_View (Node (Next)) = E then
return True;
begin
Set_Is_Hidden_Open_Scope (C);
- E := First_Entity (C);
+ E := First_Entity (C);
while Present (E) loop
if Is_Immediately_Visible (E) then
Set_Is_Immediately_Visible (E, False);
Next_Entity (E);
end loop;
- -- Make the scope name invisible as well. This is necessary, but
- -- might conflict with calls to Rtsfind later on, in case the scope
- -- is a predefined one. There is no clean solution to this problem, so
- -- for now we depend on the user not redefining Standard itself in one
- -- of the parent units.
+ -- Make the scope name invisible as well. This is necessary, but might
+ -- conflict with calls to Rtsfind later on, in case the scope is a
+ -- predefined one. There is no clean solution to this problem, so for
+ -- now we depend on the user not redefining Standard itself in one of
+ -- the parent units.
if Is_Immediately_Visible (C)
and then C /= Standard_Standard
Saved : Instance_Env;
begin
- Saved.Ada_Version := Ada_Version;
- Saved.Ada_Version_Explicit := Ada_Version_Explicit;
Saved.Instantiated_Parent := Current_Instantiated_Parent;
Saved.Exchanged_Views := Exchanged_Views;
Saved.Hidden_Entities := Hidden_Entities;
Saved.Current_Sem_Unit := Current_Sem_Unit;
Saved.Parent_Unit_Visible := Parent_Unit_Visible;
Saved.Instance_Parent_Unit := Instance_Parent_Unit;
+
+ -- Save configuration switches. These may be reset if the unit is a
+ -- predefined unit, and the current mode is not Ada 2005.
+
+ Save_Opt_Config_Switches (Saved.Switches);
+
Instance_Envs.Increment_Last;
Instance_Envs.Table (Instance_Envs.Last) := Saved;
Exchanged_Views := New_Elmt_List;
Hidden_Entities := New_Elmt_List;
- -- Make dummy entry for Instantiated parent. If generic unit is
- -- legal, this is set properly in Set_Instance_Env.
+ -- Make dummy entry for Instantiated parent. If generic unit is legal,
+ -- this is set properly in Set_Instance_Env.
Current_Instantiated_Parent :=
(Current_Scope, Current_Scope, Assoc_Null);
Act_Unit : constant Node_Id := Unit (Cunit (Get_Source_Unit (N)));
Gen_Id : constant Entity_Id := Corresponding_Spec (Gen_Body);
Par : constant Entity_Id := Scope (Gen_Id);
- Gen_Unit : constant Node_Id :=
+ Gen_Unit : constant Node_Id :=
Unit (Cunit (Get_Source_Unit (Gen_Decl)));
Orig_Body : Node_Id := Gen_Body;
F_Node : Node_Id;
Body_Unit := Unit (Cunit (Get_Source_Unit (Orig_Body)));
- -- If the instantiation and the generic definition appear in the
- -- same package declaration, this is an early instantiation.
- -- If they appear in the same declarative part, it is an early
- -- instantiation only if the generic body appears textually later,
- -- and the generic body is also in the main unit.
+ -- If the instantiation and the generic definition appear in the same
+ -- package declaration, this is an early instantiation. If they appear
+ -- in the same declarative part, it is an early instantiation only if
+ -- the generic body appears textually later, and the generic body is
+ -- also in the main unit.
-- If instance is nested within a subprogram, and the generic body is
-- not, the instance is delayed because the enclosing body is. If
-- private view problems that occur when compiling instantiations of
-- a generic child of that package (Generic_Dispatching_Constructor).
-- If the instance freezes a tagged type, inlinings of operations
- -- from Ada.Tags may need the full view of type Tag. If inlining
- -- took proper account of establishing visibility of inlined
- -- subprograms' parents then it should be possible to remove this
+ -- from Ada.Tags may need the full view of type Tag. If inlining took
+ -- proper account of establishing visibility of inlined subprograms'
+ -- parents then it should be possible to remove this
-- special check. ???
New_Scope (Par);
begin
-- We need to install the parent instance to compile the instantiation
-- of the child, but the child instance must appear in the current
- -- scope. Given that we cannot place the parent above the current
- -- scope in the scope stack, we duplicate the current scope and unstack
- -- both after the instantiation is complete.
+ -- scope. Given that we cannot place the parent above the current scope
+ -- in the scope stack, we duplicate the current scope and unstack both
+ -- after the instantiation is complete.
-- If the parent is itself the instantiation of a child unit, we must
-- also stack the instantiation of its parent, and so on. Each such
Set_Instance_Of (Formal_Ent, Actual_Ent);
if Ekind (Actual_Ent) = E_Package then
+
-- Record associations for each parameter
Act_Pkg := Actual_Ent;
when N_Generic_Package_Declaration =>
return Defining_Identifier (Original_Node (N));
- -- All other declarations are introduced by semantic analysis
- -- and have no match in the actual.
+ -- All other declarations are introduced by semantic analysis and
+ -- have no match in the actual.
- when others =>
+ when others =>
return Empty;
end case;
end Get_Formal_Entity;
Actual_Pack := Entity (Actual);
Set_Is_Instantiated (Actual_Pack);
- -- The actual may be a renamed package, or an outer generic
- -- formal package whose instantiation is converted into a renaming.
+ -- The actual may be a renamed package, or an outer generic formal
+ -- package whose instantiation is converted into a renaming.
if Present (Renamed_Object (Actual_Pack)) then
Actual_Pack := Renamed_Object (Actual_Pack);
-- current instance, those entities are made private again. If the
-- actual is currently in use, these entities are also use-visible.
- -- The loop through the actual entities also steps through the
- -- formal entities and enters associations from formals to
- -- actuals into the renaming map. This is necessary to properly
- -- handle checking of actual parameter associations for later
- -- formals that depend on actuals declared in the formal package.
+ -- The loop through the actual entities also steps through the formal
+ -- entities and enters associations from formals to actuals into the
+ -- renaming map. This is necessary to properly handle checking of
+ -- actual parameter associations for later formals that depend on
+ -- actuals declared in the formal package.
- -- In Ada 2005, partial parametrization requires that we make
- -- visible the actuals corresponding to formals that were defaulted
- -- in the formal package. There formals are identified because they
- -- remain formal generics within the formal package, rather than
- -- being renamings of the actuals supplied.
+ -- In Ada 2005, partial parametrization requires that we make visible
+ -- the actuals corresponding to formals that were defaulted in the
+ -- formal package. There formals are identified because they remain
+ -- formal generics within the formal package, rather than being
+ -- renamings of the actuals supplied.
declare
Gen_Decl : constant Node_Id :=
(Present (Formal_Node)
and then Is_Generic_Formal (Formal_Ent))
then
- -- This may make too many formal entities visible,
- -- but it's hard to build an example that exposes
- -- this excess visibility. If a reference in the
- -- generic resolved to a global variable then the
- -- extra visibility in an instance does not affect
- -- the captured entity. If the reference resolved
- -- to a local entity it will resolve again in the
- -- instance. Nevertheless, we should build tests
- -- to make sure that hidden entities in the generic
- -- remain hidden in the instance.
+ -- This may make too many formal entities visible, but
+ -- it's hard to build an example that exposes this
+ -- excess visibility. If a reference in the generic
+ -- resolved to a global variable then the extra
+ -- visibility in an instance does not affect the
+ -- captured entity. If the reference resolved to a
+ -- local entity it will resolve again in the instance.
+ -- Nevertheless, we should build tests to make sure
+ -- that hidden entities in the generic remain hidden
+ -- in the instance.
Set_Is_Hidden (Actual_Ent, False);
Set_Is_Visible_Formal (Actual_Ent);
Next_Non_Pragma (Formal_Node);
else
- -- No further formals to match, but the generic
- -- part may contain inherited operation that are
- -- not hidden in the enclosing instance.
+ -- No further formals to match, but the generic part may
+ -- contain inherited operation that are not hidden in the
+ -- enclosing instance.
Next_Entity (Actual_Ent);
end if;
end loop;
end;
- -- If the formal is not declared with a box, reanalyze it as
- -- an abbreviated instantiation, to verify the matching rules
- -- of 12.7. The actual checks are performed after the generic
- -- associations have been analyzed, to guarantee the same
- -- visibility for this instantiation and for the actuals.
+ -- If the formal is not declared with a box, reanalyze it as an
+ -- abbreviated instantiation, to verify the matching rules of 12.7.
+ -- The actual checks are performed after the generic associations
+ -- have been analyzed, to guarantee the same visibility for this
+ -- instantiation and for the actuals.
-- In Ada 2005, the generic associations for the formal can include
-- defaulted parameters. These are ignored during check. This
-----------------------
function From_Parent_Scope (Subp : Entity_Id) return Boolean is
- Gen_Scope : Node_Id := Scope (Analyzed_S);
+ Gen_Scope : Node_Id;
begin
+ Gen_Scope := Scope (Analyzed_S);
while Present (Gen_Scope)
and then Is_Child_Unit (Gen_Scope)
loop
-----------------------------
procedure Valid_Actual_Subprogram (Act : Node_Id) is
- Act_E : Entity_Id := Empty;
+ Act_E : Entity_Id;
begin
if Is_Entity_Name (Act) then
Act_E := Entity (Act);
+
elsif Nkind (Act) = N_Selected_Component
and then Is_Entity_Name (Selector_Name (Act))
then
Act_E := Entity (Selector_Name (Act));
+
+ else
+ Act_E := Empty;
end if;
if (Present (Act_E) and then Is_Overloadable (Act_E))
-- instead in Attribute_Renaming. If the actual is overloaded, it is
-- fully resolved subsequently, when the renaming declaration for the
-- formal is analyzed. If it is an explicit dereference, resolve the
- -- prefix but not the actual itself, to prevent interpretation as a
- -- call.
+ -- prefix but not the actual itself, to prevent interpretation as call.
if Present (Actual) then
Loc := Sloc (Actual);
elsif Box_Present (Formal) then
- -- Actual is resolved at the point of instantiation. Create
- -- an identifier or operator with the same name as the formal.
+ -- Actual is resolved at the point of instantiation. Create an
+ -- identifier or operator with the same name as the formal.
if Nkind (Formal_Sub) = N_Defining_Operator_Symbol then
Nam := Make_Operator_Symbol (Loc,
Specification => New_Spec,
Name => Nam);
- -- If we do not have an actual and the formal specified <> then
- -- set to get proper default.
+ -- If we do not have an actual and the formal specified <> then set to
+ -- get proper default.
if No (Actual) and then Box_Present (Formal) then
Set_From_Default (Decl_Node);
end if;
end if;
- -- The generic instantiation freezes the actual. This can only be
- -- done once the actual is resolved, in the analysis of the renaming
+ -- The generic instantiation freezes the actual. This can only be done
+ -- once the actual is resolved, in the analysis of the renaming
-- declaration. To make the formal subprogram entity available, we set
-- Corresponding_Formal_Spec to point to the formal subprogram entity.
-- This is also needed in Analyze_Subprogram_Renaming for the processing
Set_Corresponding_Formal_Spec (Decl_Node, Analyzed_S);
- -- We cannot analyze the renaming declaration, and thus find the
- -- actual, until the all the actuals are assembled in the instance.
- -- For subsequent checks of other actuals, indicate the node that
- -- will hold the instance of this formal.
+ -- We cannot analyze the renaming declaration, and thus find the actual,
+ -- until all the actuals are assembled in the instance. For subsequent
+ -- checks of other actuals, indicate the node that will hold the
+ -- instance of this formal.
Set_Instance_Of (Analyzed_S, Nam);
return List;
end if;
- -- This check is performed here because Analyze_Object_Renaming
- -- will not check it when Comes_From_Source is False. Note
- -- though that the check for the actual being the name of an
- -- object will be performed in Analyze_Object_Renaming.
+ -- This check is performed here because Analyze_Object_Renaming will
+ -- not check it when Comes_From_Source is False. Note though that the
+ -- check for the actual being the name of an object will be performed
+ -- in Analyze_Object_Renaming.
if Is_Object_Reference (Actual)
and then Is_Dependent_Component_Of_Mutable_Object (Actual)
Actual);
end if;
- -- The actual has to be resolved in order to check that it is
- -- a variable (due to cases such as F(1), where F returns
+ -- The actual has to be resolved in order to check that it is a
+ -- variable (due to cases such as F(1), where F returns
-- access to an array, and for overloaded prefixes).
Ftyp :=
and then (Base_Type (Full_View (Ftyp)) = Base_Type (Etype (Actual))
or else Base_Type (Etype (Actual)) = Ftyp)
then
- -- If the actual has the type of the full view of the formal,
- -- or else a non-private subtype of the formal, then
- -- the visibility of the formal type has changed. Add to the
- -- actuals a subtype declaration that will force the exchange
- -- of views in the body of the instance as well.
+ -- If the actual has the type of the full view of the formal, or
+ -- else a non-private subtype of the formal, then the visibility
+ -- of the formal type has changed. Add to the actuals a subtype
+ -- declaration that will force the exchange of views in the body
+ -- of the instance as well.
Subt_Decl :=
Make_Subtype_Declaration (Loc,
elsif Base_Type (Ftyp) /= Base_Type (Etype (Actual)) then
- -- Ada 2005 (AI-423): For a generic formal object of mode in
- -- out, the type of the actual shall resolve to a specific
- -- anonymous access type.
+ -- Ada 2005 (AI-423): For a generic formal object of mode in out,
+ -- the type of the actual shall resolve to a specific anonymous
+ -- access type.
if Ada_Version < Ada_05
or else
-- OUT not present
else
- -- The instantiation of a generic formal in-parameter is a
- -- constant declaration. The actual is the expression for
- -- that declaration.
+ -- The instantiation of a generic formal in-parameter is constant
+ -- declaration. The actual is the expression for that declaration.
if Present (Actual) then
if Present (Subt_Mark) then
Set_Corresponding_Generic_Association (Decl_Node, Act_Assoc);
- -- A generic formal object of a tagged type is defined
- -- to be aliased so the new constant must also be treated
- -- as aliased.
+ -- A generic formal object of a tagged type is defined to be
+ -- aliased so the new constant must also be treated as aliased.
if Is_Tagged_Type
(Etype (Defining_Identifier (Analyzed_Formal)))
Freeze_Before (Instantiation_Node, Typ);
-- If the actual is an aggregate, perform name resolution on
- -- its components (the analysis of an aggregate does not do
- -- it) to capture local names that may be hidden if the
- -- generic is a child unit.
+ -- its components (the analysis of an aggregate does not do it)
+ -- to capture local names that may be hidden if the generic is
+ -- a child unit.
if Nkind (Actual) = N_Aggregate then
Pre_Analyze_And_Resolve (Actual, Typ);
end if;
+
+ if Is_Limited_Type (Typ)
+ and then not OK_For_Limited_Init (Actual)
+ then
+ Error_Msg_N
+ ("initialization not allowed for limited types", Actual);
+ Explain_Limited_Type (Typ, Actual);
+ end if;
end;
elsif Present (Default_Expression (Formal)) then
if Is_Scalar_Type
(Etype (Defining_Identifier (Analyzed_Formal)))
then
- -- Create dummy constant declaration so that instance can
- -- be analyzed, to minimize cascaded visibility errors.
+ -- Create dummy constant declaration so that instance can be
+ -- analyzed, to minimize cascaded visibility errors.
if Present (Subt_Mark) then
Def := Subt_Mark;
end if;
-- Ada 2005 (AI-423): For a formal object declaration with a null
- -- exclusion or an access definition that has a null exclusion: If
- -- the actual matching the formal object declaration denotes a generic
+ -- exclusion or an access definition that has a null exclusion: If the
+ -- actual matching the formal object declaration denotes a generic
-- formal object of another generic unit G, and the instantiation
- -- containing the actual occurs within the body of G or within the
- -- body of a generic unit declared within the declarative region of G,
- -- then the declaration of the formal object of G shall have a null
+ -- containing the actual occurs within the body of G or within the body
+ -- of a generic unit declared within the declarative region of G, then
+ -- the declaration of the formal object of G shall have a null
-- exclusion. Otherwise, the subtype of the actual matching the formal
-- object declaration shall exclude null.
begin
Gen_Body_Id := Corresponding_Body (Gen_Decl);
- -- The instance body may already have been processed, as the parent
- -- of another instance that is inlined. (Load_Parent_Of_Generic).
+ -- The instance body may already have been processed, as the parent of
+ -- another instance that is inlined (Load_Parent_Of_Generic).
if Present (Corresponding_Body (Instance_Spec (Inst_Node))) then
return;
Gen_Body_Id := Corresponding_Body (Gen_Decl);
end if;
- -- Establish global variable for sloc adjustment and for error
- -- recovery.
+ -- Establish global variable for sloc adjustment and for error recovery
Instantiation_Node := Inst_Node;
Act_Body_Id := New_Copy (Act_Decl_Id);
- -- Some attributes of the spec entity are not inherited by the
- -- body entity.
+ -- Some attributes of spec entity are not inherited by body entity
Set_Handler_Records (Act_Body_Id, No_List);
Parent_Installed := True;
end if;
- -- If the instantiation is a library unit, and this is the main
- -- unit, then build the resulting compilation unit nodes for the
- -- instance. If this is a compilation unit but it is not the main
- -- unit, then it is the body of a unit in the context, that is being
- -- compiled because it is encloses some inlined unit or another
- -- generic unit being instantiated. In that case, this body is not
- -- part of the current compilation, and is not attached to the tree,
- -- but its parent must be set for analysis.
+ -- If the instantiation is a library unit, and this is the main unit,
+ -- then build the resulting compilation unit nodes for the instance.
+ -- If this is a compilation unit but it is not the main unit, then it
+ -- is the body of a unit in the context, that is being compiled
+ -- because it is encloses some inlined unit or another generic unit
+ -- being instantiated. In that case, this body is not part of the
+ -- current compilation, and is not attached to the tree, but its
+ -- parent must be set for analysis.
if Nkind (Parent (Inst_Node)) = N_Compilation_Unit then
- -- Replace instance node with body of instance, and create
- -- new node for corresponding instance declaration.
+ -- Replace instance node with body of instance, and create new
+ -- node for corresponding instance declaration.
Build_Instance_Compilation_Unit_Nodes
(Inst_Node, Act_Body, Act_Decl);
if Parent (Inst_Node) = Cunit (Main_Unit) then
- -- If the instance is a child unit itself, then set the
- -- scope of the expanded body to be the parent of the
- -- instantiation (ensuring that the fully qualified name
- -- will be generated for the elaboration subprogram).
+ -- If the instance is a child unit itself, then set the scope
+ -- of the expanded body to be the parent of the instantiation
+ -- (ensuring that the fully qualified name will be generated
+ -- for the elaboration subprogram).
if Nkind (Defining_Unit_Name (Act_Spec)) =
N_Defining_Program_Unit_Name
Install_Body (Act_Body, Inst_Node, Gen_Body, Gen_Decl);
- -- Now analyze the body. We turn off all checks if this is
- -- an internal unit, since there is no reason to have checks
- -- on for any predefined run-time library code. All such
- -- code is designed to be compiled with checks off.
+ -- Now analyze the body. We turn off all checks if this is an
+ -- internal unit, since there is no reason to have checks on for
+ -- any predefined run-time library code. All such code is designed
+ -- to be compiled with checks off.
- -- Note that we do NOT apply this criterion to children of
- -- GNAT (or on VMS, children of DEC). The latter units must
- -- suppress checks explicitly if this is needed.
+ -- Note that we do NOT apply this criterion to children of GNAT
+ -- (or on VMS, children of DEC). The latter units must suppress
+ -- checks explicitly if this is needed.
if Is_Predefined_File_Name
(Unit_File_Name (Get_Source_Unit (Gen_Decl)))
Inherit_Context (Gen_Body, Inst_Node);
end if;
- -- Remove the parent instances if they have been placed on the
- -- scope stack to compile the body.
+ -- Remove the parent instances if they have been placed on the scope
+ -- stack to compile the body.
if Parent_Installed then
Remove_Parent (In_Body => True);
Restore_Env;
Style_Check := Save_Style_Check;
- -- If we have no body, and the unit requires a body, then complain.
- -- This complaint is suppressed if we have detected other errors
- -- (since a common reason for missing the body is that it had errors).
+ -- If we have no body, and the unit requires a body, then complain. This
+ -- complaint is suppressed if we have detected other errors (since a
+ -- common reason for missing the body is that it had errors).
elsif Unit_Requires_Body (Gen_Unit) then
if Serious_Errors_Detected = 0 then
Error_Msg_NE
("cannot find body of generic package &", Inst_Node, Gen_Unit);
- -- Don't attempt to perform any cleanup actions if some other
- -- error was aready detected, since this can cause blowups.
+ -- Don't attempt to perform any cleanup actions if some other error
+ -- was aready detected, since this can cause blowups.
else
return;
-- Case of package that does not need a body
else
- -- If the instantiation of the declaration is a library unit,
- -- rewrite the original package instantiation as a package
- -- declaration in the compilation unit node.
+ -- If the instantiation of the declaration is a library unit, rewrite
+ -- the original package instantiation as a package declaration in the
+ -- compilation unit node.
if Nkind (Parent (Inst_Node)) = N_Compilation_Unit then
Set_Parent_Spec (Act_Decl, Parent_Spec (Inst_Node));
Rewrite (Inst_Node, Act_Decl);
- -- Generate elaboration entity, in case spec has elaboration
- -- code. This cannot be done when the instance is analyzed,
- -- because it is not known yet whether the body exists.
+ -- Generate elaboration entity, in case spec has elaboration code.
+ -- This cannot be done when the instance is analyzed, because it
+ -- is not known yet whether the body exists.
Set_Elaboration_Entity_Required (Act_Decl_Id, False);
Build_Elaboration_Entity (Parent (Inst_Node), Act_Decl_Id);
-- If the instantiation is not a library unit, then append the
- -- declaration to the list of implicitly generated entities.
- -- unless it is already a list member which means that it was
- -- already processed
+ -- declaration to the list of implicitly generated entities. unless
+ -- it is already a list member which means that it was already
+ -- processed
elsif not Is_List_Member (Act_Decl) then
Mark_Rewrite_Insertion (Act_Decl);
Instantiating => True),
Name => New_Occurrence_Of (Anon_Id, Loc));
- -- If there is a formal subprogram with the same name as the
- -- unit itself, do not add this renaming declaration. This is
- -- a temporary fix for one ACVC test. ???
+ -- If there is a formal subprogram with the same name as the unit
+ -- itself, do not add this renaming declaration. This is a temporary
+ -- fix for one ACVC test. ???
Prev_Formal := First_Entity (Pack_Id);
while Present (Prev_Formal) loop
Decls := New_List (Unit_Renaming, Act_Body);
end if;
- -- The subprogram body is placed in the body of a dummy package
- -- body, whose spec contains the subprogram declaration as well
- -- as the renaming declarations for the generic parameters.
+ -- The subprogram body is placed in the body of a dummy package body,
+ -- whose spec contains the subprogram declaration as well as the
+ -- renaming declarations for the generic parameters.
Pack_Body := Make_Package_Body (Loc,
Defining_Unit_Name => New_Copy (Pack_Id),
Restore_Env;
Style_Check := Save_Style_Check;
- -- Body not found. Error was emitted already. If there were no
- -- previous errors, this may be an instance whose scope is a premature
- -- instance. In that case we must insure that the (legal) program does
- -- raise program error if executed. We generate a subprogram body for
- -- this purpose. See DEC ac30vso.
+ -- Body not found. Error was emitted already. If there were no previous
+ -- errors, this may be an instance whose scope is a premature instance.
+ -- In that case we must insure that the (legal) program does raise
+ -- program error if executed. We generate a subprogram body for this
+ -- purpose. See DEC ac30vso.
+
+ -- Should not reference proprietary DEC tests in comments ???
elsif Serious_Errors_Detected = 0
and then Nkind (Parent (Inst_Node)) /= N_Compilation_Unit
Ancestor :=
Get_Instance_Of (Base_Type (Etype (A_Gen_T)));
- -- The type may be a local derivation, or a type extension of
- -- a previous formal, or of a formal of a parent package.
+ -- The type may be a local derivation, or a type extension of a
+ -- previous formal, or of a formal of a parent package.
elsif Is_Derived_Type (Get_Instance_Of (A_Gen_T))
or else
Ekind (Get_Instance_Of (A_Gen_T)) = E_Record_Type_With_Private
then
- -- Check whether the parent is another derived formal type
- -- in the same generic unit.
+ -- Check whether the parent is another derived formal type in the
+ -- same generic unit.
if Etype (A_Gen_T) /= A_Gen_T
and then Is_Generic_Type (Etype (A_Gen_T))
Actual);
end if;
- -- It should not be necessary to check for unknown discriminants
- -- on Formal, but for some reason Has_Unknown_Discriminants is
- -- false for A_Gen_T, so Is_Indefinite_Subtype incorrectly
- -- returns False. This needs fixing. ???
+ -- It should not be necessary to check for unknown discriminants on
+ -- Formal, but for some reason Has_Unknown_Discriminants is false for
+ -- A_Gen_T, so Is_Indefinite_Subtype incorrectly returns False. This
+ -- needs fixing. ???
if not Is_Indefinite_Subtype (A_Gen_T)
and then not Unknown_Discriminants_Present (Formal)
Abandon_Instantiation (Actual);
end if;
- -- Ancestor is unconstrained, Check if generic formal and
- -- actual agree on constrainedness. The check only applies
- -- to array types and discriminated types.
+ -- Ancestor is unconstrained, Check if generic formal and actual
+ -- agree on constrainedness. The check only applies to array types
+ -- and discriminated types.
elsif Is_Constrained (Act_T) then
if Ekind (Ancestor) = E_Access_Type
Abandon_Instantiation (Actual);
end if;
- -- A class-wide type is only allowed if the formal has
- -- unknown discriminants.
+ -- A class-wide type is only allowed if the formal has unknown
+ -- discriminants.
elsif Is_Class_Wide_Type (Act_T)
and then not Has_Unknown_Discriminants (Ancestor)
("actual for & cannot be a class-wide type", Actual, Gen_T);
Abandon_Instantiation (Actual);
- -- Otherwise, the formal and actual shall have the same
- -- number of discriminants and each discriminant of the
- -- actual must correspond to a discriminant of the formal.
+ -- Otherwise, the formal and actual shall have the same number
+ -- of discriminants and each discriminant of the actual must
+ -- correspond to a discriminant of the formal.
elsif Has_Discriminants (Act_T)
and then not Has_Unknown_Discriminants (Act_T)
Abandon_Instantiation (Actual);
end if;
- -- This case should be caught by the earlier check for
- -- for constrainedness, but the check here is added for
- -- completeness.
+ -- This case should be caught by the earlier check for for
+ -- constrainedness, but the check here is added for completeness.
elsif Has_Discriminants (Act_T)
and then not Has_Unknown_Discriminants (Act_T)
Class_Wide_Type (Act_T));
end if;
- if not Is_Abstract (A_Gen_T)
- and then Is_Abstract (Act_T)
+ if not Is_Abstract_Type (A_Gen_T)
+ and then Is_Abstract_Type (Act_T)
then
Error_Msg_N
("actual of non-abstract formal cannot be abstract", Actual);
Subt := New_Copy (Gen_T);
- -- Use adjusted sloc of subtype name as the location for other
- -- nodes in the subtype declaration.
+ -- Use adjusted sloc of subtype name as the location for other nodes in
+ -- the subtype declaration.
Loc := Sloc (Subt);
if Unum = Main_Unit then
return True;
- -- If the current unit is a subunit then it is either the main unit
- -- or is being compiled as part of the main unit.
+ -- If the current unit is a subunit then it is either the main unit or
+ -- is being compiled as part of the main unit.
elsif Nkind (N) = N_Compilation_Unit then
return Nkind (Unit (N)) = N_Subunit;
Current_Unit := Parent (Current_Unit);
end loop;
- -- The instantiation node is in the main unit, or else the current
- -- node (perhaps as the result of nested instantiations) is in the
- -- main unit, or in the declaration of the main unit, which in this
- -- last case must be a body.
+ -- The instantiation node is in the main unit, or else the current node
+ -- (perhaps as the result of nested instantiations) is in the main unit,
+ -- or in the declaration of the main unit, which in this last case must
+ -- be a body.
return Unum = Main_Unit
or else Current_Unit = Cunit (Main_Unit)
or else (Nkind (Unit (Comp_Unit)) = N_Package_Body
and then not Is_In_Main_Unit (Spec))
then
- -- Find body of parent of spec, and analyze it. A special case
- -- arises when the parent is an instantiation, that is to say when
- -- we are currently instantiating a nested generic. In that case,
- -- there is no separate file for the body of the enclosing instance.
- -- Instead, the enclosing body must be instantiated as if it were
- -- a pending instantiation, in order to produce the body for the
- -- nested generic we require now. Note that in that case the
- -- generic may be defined in a package body, the instance defined
- -- in the same package body, and the original enclosing body may not
- -- be in the main unit.
+ -- Find body of parent of spec, and analyze it. A special case arises
+ -- when the parent is an instantiation, that is to say when we are
+ -- currently instantiating a nested generic. In that case, there is
+ -- no separate file for the body of the enclosing instance. Instead,
+ -- the enclosing body must be instantiated as if it were a pending
+ -- instantiation, in order to produce the body for the nested generic
+ -- we require now. Note that in that case the generic may be defined
+ -- in a package body, the instance defined in the same package body,
+ -- and the original enclosing body may not be in the main unit.
True_Parent := Parent (Spec);
Inst_Node := Empty;
if No (Corresponding_Body (Instance_Spec (Inst_Node))) then
- -- We need to determine the expander mode to instantiate
- -- the enclosing body. Because the generic body we need
- -- may use global entities declared in the enclosing package
- -- (including aggregates) it is in general necessary to
- -- compile this body with expansion enabled. The exception
- -- is if we are within a generic package, in which case
- -- the usual generic rule applies.
+ -- We need to determine the expander mode to instantiate the
+ -- enclosing body. Because the generic body we need may use
+ -- global entities declared in the enclosing package (including
+ -- aggregates) it is in general necessary to compile this body
+ -- with expansion enabled. The exception is if we are within a
+ -- generic package, in which case the usual generic rule
+ -- applies.
declare
Exp_Status : Boolean := True;
end if;
end if;
- -- If loading the parent of the generic caused an instantiation
- -- circularity, we abandon compilation at this point, because
- -- otherwise in some cases we get into trouble with infinite
- -- recursions after this point.
+ -- If loading parent of the generic caused an instantiation circularity,
+ -- we abandon compilation at this point, because otherwise in some cases
+ -- we get into trouble with infinite recursions after this point.
if Circularity_Detected then
raise Unrecoverable_Error;
else
while Scop /= Standard_Standard loop
-
if Scop = Out_Of then
return False;
else
Hidden : Elmt_Id;
begin
- -- After child instantiation is complete, remove from scope stack
- -- the extra copy of the current scope, and then remove parent
- -- instances.
+ -- After child instantiation is complete, remove from scope stack the
+ -- extra copy of the current scope, and then remove parent instances.
if not In_Body then
Pop_Scope;
exit when S = Standard_Standard;
end loop;
end if;
-
end Remove_Parent;
-----------------
Saved : Instance_Env renames Instance_Envs.Table (Instance_Envs.Last);
begin
- Ada_Version := Saved.Ada_Version;
- Ada_Version_Explicit := Saved.Ada_Version_Explicit;
-
if No (Current_Instantiated_Parent.Act_Id) then
-- Restore environment after subprogram inlining
Parent_Unit_Visible := Saved.Parent_Unit_Visible;
Instance_Parent_Unit := Saved.Instance_Parent_Unit;
+ Restore_Opt_Config_Switches (Saved.Switches);
+
Instance_Envs.Decrement_Last;
end Restore_Env;
-- Hide the generic formals of formal packages declared with box
-- which were reachable in the current instantiation.
+ ---------------------------
+ -- Restore_Nested_Formal --
+ ---------------------------
+
procedure Restore_Nested_Formal (Formal : Entity_Id) is
Ent : Entity_Id;
Set_Is_Generic_Actual_Type (E, False);
-- An unusual case of aliasing: the actual may also be directly
- -- visible in the generic, and be private there, while it is
- -- fully visible in the context of the instance. The internal
- -- subtype is private in the instance, but has full visibility
- -- like its parent in the enclosing scope. This enforces the
- -- invariant that the privacy status of all private dependents of
- -- a type coincide with that of the parent type. This can only
- -- happen when a generic child unit is instantiated within a
- -- sibling.
+ -- visible in the generic, and be private there, while it is fully
+ -- visible in the context of the instance. The internal subtype is
+ -- private in the instance, but has full visibility like its
+ -- parent in the enclosing scope. This enforces the invariant that
+ -- the privacy status of all private dependents of a type coincide
+ -- with that of the parent type. This can only happen when a
+ -- generic child unit is instantiated within sibling.
if Is_Private_Type (E)
and then not Is_Private_Type (Etype (E))
N2 : Node_Id;
function Is_Global (E : Entity_Id) return Boolean;
- -- Check whether entity is defined outside of generic unit.
- -- Examine the scope of an entity, and the scope of the scope,
- -- etc, until we find either Standard, in which case the entity
- -- is global, or the generic unit itself, which indicates that
- -- the entity is local. If the entity is the generic unit itself,
- -- as in the case of a recursive call, or the enclosing generic unit,
- -- if different from the current scope, then it is local as well,
- -- because it will be replaced at the point of instantiation. On
- -- the other hand, if it is a reference to a child unit of a common
- -- ancestor, which appears in an instantiation, it is global because
- -- it is used to denote a specific compilation unit at the time the
- -- instantiations will be analyzed.
+ -- Check whether entity is defined outside of generic unit. Examine the
+ -- scope of an entity, and the scope of the scope, etc, until we find
+ -- either Standard, in which case the entity is global, or the generic
+ -- unit itself, which indicates that the entity is local. If the entity
+ -- is the generic unit itself, as in the case of a recursive call, or
+ -- the enclosing generic unit, if different from the current scope, then
+ -- it is local as well, because it will be replaced at the point of
+ -- instantiation. On the other hand, if it is a reference to a child
+ -- unit of a common ancestor, which appears in an instantiation, it is
+ -- global because it is used to denote a specific compilation unit at
+ -- the time the instantiations will be analyzed.
procedure Reset_Entity (N : Node_Id);
-- Save semantic information on global entity, so that it is not
-- Apply Save_Global_References to the two syntactic descendants of
-- non-terminal nodes that carry an Associated_Node and are processed
-- through Reset_Entity. Once the global entity (if any) has been
- -- captured together with its type, only two syntactic descendants
- -- need to be traversed to complete the processing of the tree rooted
- -- at N. This applies to Selected_Components, Expanded_Names, and to
- -- Operator nodes. N can also be a character literal, identifier, or
- -- operator symbol node, but the call has no effect in these cases.
+ -- captured together with its type, only two syntactic descendants need
+ -- to be traversed to complete the processing of the tree rooted at N.
+ -- This applies to Selected_Components, Expanded_Names, and to Operator
+ -- nodes. N can also be a character literal, identifier, or operator
+ -- symbol node, but the call has no effect in these cases.
procedure Save_Global_Defaults (N1, N2 : Node_Id);
-- Default actuals in nested instances must be handled specially
-- so that it can be properly resolved in a subsequent instantiation.
procedure Save_Global_Descendant (D : Union_Id);
- -- Apply Save_Global_References recursively to the descendents of
+ -- Apply Save_Global_References recursively to the descendents of the
-- current node.
procedure Save_References (N : Node_Id);
Set_Global_Type (Parent (N), Parent (N2));
Save_Entity_Descendants (N);
- -- If this is a reference to the current generic entity,
- -- replace by the name of the generic homonym of the current
- -- package. This is because in an instantiation Par.P.Q will
- -- not resolve to the name of the instance, whose enclosing
- -- scope is not necessarily Par. We use the generic homonym
- -- rather that the name of the generic itself, because it may
- -- be hidden by a local declaration.
+ -- If this is a reference to the current generic entity, replace
+ -- by the name of the generic homonym of the current package. This
+ -- is because in an instantiation Par.P.Q will not resolve to the
+ -- name of the instance, whose enclosing scope is not necessarily
+ -- Par. We use the generic homonym rather that the name of the
+ -- generic itself, because it may be hidden by a local
+ -- declaration.
elsif In_Open_Scopes (Entity (Parent (N2)))
and then not
(Parent (Parent (N)), Parent (Parent ((N2))));
end if;
- -- A selected component may denote a static constant that has
- -- been folded. Make the same replacement in original tree.
+ -- A selected component may denote a static constant that has been
+ -- folded. Make the same replacement in original tree.
elsif Nkind (Parent (N)) = N_Selected_Component
and then (Nkind (Parent (N2)) = N_Integer_Literal
Set_Analyzed (Parent (N), False);
-- A selected component may be transformed into a parameterless
- -- function call. If the called entity is global, rewrite the
- -- node appropriately, i.e. as an extended name for the global
- -- entity.
+ -- function call. If the called entity is global, rewrite the node
+ -- appropriately, i.e. as an extended name for the global entity.
elsif Nkind (Parent (N)) = N_Selected_Component
and then Nkind (Parent (N2)) = N_Function_Call
Save_Entity_Descendants (N);
else
- -- Entity is local. Reset in generic unit, so that node
- -- is resolved anew at the point of instantiation.
+ -- Entity is local. Reset in generic unit, so that node is
+ -- resolved anew at the point of instantiation.
Set_Associated_Node (N, Empty);
Set_Etype (N, Empty);
Append (Ndec, Assoc1);
- -- If there are other defaults, add a dummy association
- -- in case there are other defaulted formals with the same
- -- name.
+ -- If there are other defaults, add a dummy association in case
+ -- there are other defaulted formals with the same name.
elsif Present (Next (Act2)) then
Ndec :=
-- specially a number of node rewritings that are required by semantic
-- processing and which change the kind of nodes in the generic copy:
-- typically constant-folding, replacing an operator node by a string
- -- literal, or a selected component by an expanded name. In each of
+ -- literal, or a selected component by an expanded name. In each of
-- those cases, the transformation is propagated to the generic unit.
procedure Save_References (N : Node_Id) is
end if;
elsif Nkind (N) in N_Op then
-
if Nkind (N) = Nkind (Get_Associated_Node (N)) then
-
if Nkind (N) = N_Op_Concat then
Set_Is_Component_Left_Opnd (N,
Is_Component_Left_Opnd (Get_Associated_Node (N)));
end if;
Reset_Entity (N);
+
else
-- Node may be transformed into call to a user-defined operator
Set_Etype (N, Empty);
end if;
- -- The subtype mark of a nominally unconstrained object
- -- is rewritten as a subtype indication using the bounds
- -- of the expression. Recover the original subtype mark.
+ -- The subtype mark of a nominally unconstrained object is
+ -- rewritten as a subtype indication using the bounds of the
+ -- expression. Recover the original subtype mark.
elsif Nkind (N2) = N_Subtype_Indication
and then Is_Entity_Name (Original_Node (N2))
-- If the aggregate is an actual in a call, it has been
-- resolved in the current context, to some local type.
- -- The enclosing call may have been disambiguated by
- -- the aggregate, and this disambiguation might fail at
+ -- The enclosing call may have been disambiguated by the
+ -- aggregate, and this disambiguation might fail at
-- instantiation time because the type to which the
-- aggregate did resolve is not preserved. In order to
-- preserve some of this information, we wrap the
begin
Gen_Scope := Current_Scope;
- -- If the generic unit is a child unit, references to entities in
- -- the parent are treated as local, because they will be resolved
- -- anew in the context of the instance of the parent.
+ -- If the generic unit is a child unit, references to entities in the
+ -- parent are treated as local, because they will be resolved anew in
+ -- the context of the instance of the parent.
while Is_Child_Unit (Gen_Scope)
and then Ekind (Scope (Gen_Scope)) = E_Generic_Package
procedure Start_Generic is
begin
- -- ??? I am sure more things could be factored out in this
- -- routine. Should probably be done at a later stage.
+ -- ??? I am sure more things could be factored out in this routine.
+ -- Should probably be done at a later stage.
Generic_Flags.Increment_Last;
Generic_Flags.Table (Generic_Flags.Last) := Inside_A_Generic;
-- the most current Ada mode, and earlier version Ada checks do not
-- apply to predefined units.
- -- Why is this not using the routine Opt.Set_Opt_Config_Switches ???
-
- if Is_Internal_File_Name
+ Set_Opt_Config_Switches (
+ Is_Internal_File_Name
(Fname => Unit_File_Name (Get_Source_Unit (Gen_Unit)),
- Renamings_Included => True) then
- Ada_Version := Ada_Version_Type'Last;
- end if;
+ Renamings_Included => True),
+ Current_Sem_Unit = Main_Unit);
Current_Instantiated_Parent := (Gen_Unit, Act_Unit, Assoc_Null);
end Set_Instance_Env;
while Present (Priv_Elmt) loop
Priv_Sub := (Node (Priv_Elmt));
- -- We avoid flipping the subtype if the Etype of its full
- -- view is private because this would result in a malformed
- -- subtype. This occurs when the Etype of the subtype full
- -- view is the full view of the base type (and since the
- -- base types were just switched, the subtype is pointing
- -- to the wrong view). This is currently the case for
- -- tagged record types, access types (maybe more?) and
- -- needs to be resolved. ???
+ -- We avoid flipping the subtype if the Etype of its full view is
+ -- private because this would result in a malformed subtype. This
+ -- occurs when the Etype of the subtype full view is the full view of
+ -- the base type (and since the base types were just switched, the
+ -- subtype is pointing to the wrong view). This is currently the case
+ -- for tagged record types, access types (maybe more?) and needs to
+ -- be resolved. ???
if Present (Full_View (Priv_Sub))
and then not Is_Private_Type (Etype (Full_View (Priv_Sub)))
projects / platform / upstream / linaro-gcc.git / commitdiff