| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT COMPILER COMPONENTS -- |
| -- -- |
| -- S E M _ U T I L -- |
| -- -- |
| -- S p e c -- |
| -- -- |
| -- $Revision: 1.2 $ |
| -- -- |
| -- Copyright (C) 1992-2001, Free Software Foundation, Inc. -- |
| -- -- |
| -- GNAT is free software; you can redistribute it and/or modify it under -- |
| -- terms of the GNU General Public License as published by the Free Soft- -- |
| -- ware Foundation; either version 2, or (at your option) any later ver- -- |
| -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- |
| -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- |
| -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- |
| -- for more details. You should have received a copy of the GNU General -- |
| -- Public License distributed with GNAT; see file COPYING. If not, write -- |
| -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- |
| -- MA 02111-1307, USA. -- |
| -- -- |
| -- GNAT was originally developed by the GNAT team at New York University. -- |
| -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| -- Package containing utility procedures used throughout the semantics |
| |
| with Einfo; use Einfo; |
| with Types; use Types; |
| with Uintp; use Uintp; |
| with Urealp; use Urealp; |
| |
| package Sem_Util is |
| |
| procedure Add_Access_Type_To_Process (E : Entity_Id; A : Entity_Id); |
| -- Add A to the list of access types to process when expanding the |
| -- freeze node of E. |
| |
| function Alignment_In_Bits (E : Entity_Id) return Uint; |
| -- If the alignment of the type or object E is currently known to the |
| -- compiler, then this function returns the alignment value in bits. |
| -- Otherwise Uint_0 is returned, indicating that the alignment of the |
| -- entity is not yet known to the compiler. |
| |
| procedure Apply_Compile_Time_Constraint_Error |
| (N : Node_Id; |
| Msg : String; |
| Ent : Entity_Id := Empty; |
| Typ : Entity_Id := Empty; |
| Loc : Source_Ptr := No_Location; |
| Rep : Boolean := True); |
| -- N is a subexpression which will raise constraint error when evaluated |
| -- at runtime. Msg is a message that explains the reason for raising the |
| -- exception. The last character is ? if the message is always a |
| -- warning, even in Ada 95, and is not a ? if the message represents an |
| -- illegality (because of violation of static expression rules) in Ada 95 |
| -- (but not in Ada 83). Typically this routine posts all messages at |
| -- the Sloc of node N. However, if Loc /= No_Location, Loc is the Sloc |
| -- used to output the message. After posting the appropriate message, |
| -- and if the flag Rep is set, this routine replaces the expression |
| -- with an N_Raise_Constraint_Error node. This node is then marked as |
| -- being static if the original node is static, but sets the flag |
| -- Raises_Constraint_Error, preventing further evaluation. |
| -- The error message may contain a } or & insertion character. |
| -- This normally references Etype (N), unless the Ent argument is given |
| -- explicitly, in which case it is used instead. The type of the raise |
| -- node that is built is normally Etype (N), but if the Typ parameter |
| -- is present, this is used instead. |
| |
| function Build_Actual_Subtype |
| (T : Entity_Id; |
| N : Node_Or_Entity_Id) |
| return Node_Id; |
| -- Build an anonymous subtype for an entity or expression, using the |
| -- bounds of the entity or the discriminants of the enclosing record. |
| -- T is the type for which the actual subtype is required, and N is either |
| -- a defining identifier, or any subexpression. |
| |
| function Build_Actual_Subtype_Of_Component |
| (T : Entity_Id; |
| N : Node_Id) |
| return Node_Id; |
| -- Determine whether a selected component has a type that depends on |
| -- discriminants, and build actual subtype for it if so. |
| |
| function Build_Discriminal_Subtype_Of_Component |
| (T : Entity_Id) |
| return Node_Id; |
| -- Determine whether a record component has a type that depends on |
| -- discriminants, and build actual subtype for it if so. |
| |
| procedure Build_Elaboration_Entity (N : Node_Id; Spec_Id : Entity_Id); |
| -- Given a compilation unit node N, allocate an elaboration boolean for |
| -- the compilation unit, and install it in the Elaboration_Entity field |
| -- of Spec_Id, the entity for the compilation unit. |
| |
| procedure Check_Fully_Declared (T : Entity_Id; N : Node_Id); |
| -- Verify that the full declaration of type T has been seen. If not, |
| -- place error message on node N. Used in object declarations, type |
| -- conversions, qualified expressions. |
| |
| procedure Check_Potentially_Blocking_Operation (N : Node_Id); |
| -- N is one of the statement forms that is a potentially blocking |
| -- operation. If it appears within a protected action, emit warning |
| -- and raise Program_Error. |
| |
| procedure Check_VMS (Construct : Node_Id); |
| -- Check that this the target is OpenVMS, and if so, return with |
| -- no effect, otherwise post an error noting this can only be used |
| -- with OpenVMS ports. The argument is the construct in question |
| -- and is used to post the error message. |
| |
| function Collect_Primitive_Operations (T : Entity_Id) return Elist_Id; |
| -- Called upon type derivation and extension. We scan the declarative |
| -- part in which the type appears, and collect subprograms that have |
| -- one subsidiary subtype of the type. These subprograms can only |
| -- appear after the type itself. |
| |
| function Compile_Time_Constraint_Error |
| (N : Node_Id; |
| Msg : String; |
| Ent : Entity_Id := Empty; |
| Loc : Source_Ptr := No_Location) |
| return Node_Id; |
| -- Subsidiary to Apply_Compile_Time_Constraint_Error and Checks routines. |
| -- Does not modify any nodes, but generates a warning (or error) message. |
| -- For convenience, the function always returns its first argument. |
| |
| procedure Conditional_Delay (New_Ent, Old_Ent : Entity_Id); |
| -- Sets the Has_Delayed_Freeze flag of New if the Delayed_Freeze flag |
| -- of Old is set and Old has no yet been Frozen (i.e. Is_Frozen is false); |
| |
| function Current_Entity (N : Node_Id) return Entity_Id; |
| -- Find the currently visible definition for a given identifier, that is to |
| -- say the first entry in the visibility chain for the Chars of N. |
| |
| function Current_Entity_In_Scope (N : Node_Id) return Entity_Id; |
| -- Find whether there is a previous definition for identifier N in the |
| -- current scope. Because declarations for a scope are not necessarily |
| -- contiguous (e.g. for packages) the first entry on the visibility chain |
| -- for N is not necessarily in the current scope. |
| |
| function Current_Scope return Entity_Id; |
| -- Get entity representing current scope |
| |
| function Current_Subprogram return Entity_Id; |
| -- Returns current enclosing subprogram. If Current_Scope is a subprogram, |
| -- then that is what is returned, otherwise the Enclosing_Subprogram of |
| -- the Current_Scope is returned. The returned value is Empty if this |
| -- is called from a library package which is not within any subprogram. |
| |
| function Defining_Entity (N : Node_Id) return Entity_Id; |
| -- Given a declaration N, returns the associated defining entity. If |
| -- the declaration has a specification, the entity is obtained from |
| -- the specification. If the declaration has a defining unit name, |
| -- then the defining entity is obtained from the defining unit name |
| -- ignoring any child unit prefixes. |
| |
| function Denotes_Discriminant (N : Node_Id) return Boolean; |
| -- Returns True if node N is an N_Identifier node for a discriminant. |
| -- Returns False for any other kind of node, or for an N_Identifier |
| -- node that does not denote a discriminant. |
| |
| function Depends_On_Discriminant (N : Node_Id) return Boolean; |
| -- Returns True if N denotes a discriminant or if N is a range, a subtype |
| -- indication or a scalar subtype where one of the bounds is a |
| -- discriminant. |
| |
| function Designate_Same_Unit |
| (Name1 : Node_Id; |
| Name2 : Node_Id) |
| return Boolean; |
| -- Return true if Name1 and Name2 designate the same unit name; |
| -- each of these names is supposed to be a selected component name, |
| -- an expanded name, a defining program unit name or an identifier |
| |
| function Enclosing_Generic_Body |
| (E : Entity_Id) |
| return Node_Id; |
| -- Returns the Node_Id associated with the innermost enclosing |
| -- generic body, if any. If none, then returns Empty. |
| |
| function Enclosing_Lib_Unit_Entity return Entity_Id; |
| -- Returns the entity of enclosing N_Compilation_Unit Node which is the |
| -- root of the current scope (which must not be Standard_Standard, and |
| -- the caller is responsible for ensuring this condition). |
| |
| function Enclosing_Lib_Unit_Node (N : Node_Id) return Node_Id; |
| -- Returns the enclosing N_Compilation_Unit Node that is the root |
| -- of a subtree containing N. |
| |
| function Enclosing_Subprogram (E : Entity_Id) return Entity_Id; |
| -- Utility function to return the Ada entity of the subprogram enclosing |
| -- the entity E, if any. Returns Empty if no enclosing subprogram. |
| |
| procedure Ensure_Freeze_Node (E : Entity_Id); |
| -- Make sure a freeze node is allocated for entity E. If necessary, |
| -- build and initialize a new freeze node and set Has_Delayed_Freeze |
| -- true for entity E. |
| |
| procedure Enter_Name (Def_Id : Node_Id); |
| -- Insert new name in symbol table of current scope with check for |
| -- duplications (error message is issued if a conflict is found) |
| -- Note: Enter_Name is not used for overloadable entities, instead |
| -- these are entered using Sem_Ch6.Enter_Overloadable_Entity. |
| |
| function Find_Corresponding_Discriminant |
| (Id : Node_Id; |
| Typ : Entity_Id) |
| return Entity_Id; |
| -- Because discriminants may have different names in a generic unit |
| -- and in an instance, they are resolved positionally when possible. |
| -- A reference to a discriminant carries the discriminant that it |
| -- denotes when analyzed. Subsequent uses of this id on a different |
| -- type denote the discriminant at the same position in this new type. |
| |
| function First_Actual (Node : Node_Id) return Node_Id; |
| -- Node is an N_Function_Call or N_Procedure_Call_Statement node. The |
| -- result returned is the first actual parameter in declaration order |
| -- (not the order of parameters as they appeared in the source, which |
| -- can be quite different as a result of the use of named parameters). |
| -- Empty is returned for a call with no parameters. The procedure for |
| -- iterating through the actuals in declaration order is to use this |
| -- function to find the first actual, and then use Next_Actual to obtain |
| -- the next actual in declaration order. Note that the value returned |
| -- is always the expression (not the N_Parameter_Association nodes |
| -- even if named association is used). |
| |
| function Full_Qualified_Name (E : Entity_Id) return String_Id; |
| -- Generates the string literal corresponding to the E's full qualified |
| -- name in upper case. An ASCII.NUL is appended as the last character |
| |
| procedure Gather_Components |
| (Typ : Entity_Id; |
| Comp_List : Node_Id; |
| Governed_By : List_Id; |
| Into : Elist_Id; |
| Report_Errors : out Boolean); |
| -- The purpose of this procedure is to gather the valid components |
| -- in a record type according to the values of its discriminants, in order |
| -- to validate the components of a record aggregate. |
| -- |
| -- Typ is the type of the aggregate when its constrained discriminants |
| -- need to be collected, otherwise it is Empty. |
| -- |
| -- Comp_List is an N_Component_List node. |
| -- |
| -- Governed_By is a list of N_Component_Association nodes, |
| -- where each choice list contains the name of a discriminant and |
| -- the expression field gives its value. The values of the |
| -- discriminants governing the (possibly nested) variant parts in |
| -- Comp_List are found in this Component_Association List. |
| -- |
| -- Into is the list where the valid components are appended. |
| -- Note that Into need not be an Empty list. If it's not, components |
| -- are attached to its tail. |
| -- |
| -- Report_Errors is set to True if the values of the discriminants |
| -- are non-static. |
| |
| -- This procedure is also used when building a record subtype. If the |
| -- discriminant constraint of the subtype is static, the components of the |
| -- subtype are only those of the variants selected by the values of the |
| -- discriminants. Otherwise all components of the parent must be included |
| -- in the subtype for semantic analysis. |
| |
| function Get_Actual_Subtype (N : Node_Id) return Entity_Id; |
| -- Given a node for an expression, obtain the actual subtype of the |
| -- expression. In the case of a parameter where the formal is an |
| -- unconstrained array or discriminated type, this will be the |
| -- previously constructed subtype of the actual. Note that this is |
| -- not quite the "Actual Subtype" of the RM, since it is always |
| -- a constrained type, i.e. it is the subtype of the value of the |
| -- actual. The actual subtype is also returned in other cases where |
| -- it has already been constructed for an object. Otherwise the |
| -- expression type is returned unchanged, except for the case of an |
| -- unconstrained array type, where an actual subtype is created, using |
| -- Insert_Actions if necessary to insert any associated actions. |
| |
| function Get_Actual_Subtype_If_Available (N : Node_Id) return Entity_Id; |
| -- This is like Get_Actual_Subtype, except that it never constructs an |
| -- actual subtype. If an actual subtype is already available, i.e. the |
| -- Actual_Subtype field of the corresponding entity is set, then it is |
| -- returned. Otherwise the Etype of the node is returned. |
| |
| function Get_Default_External_Name (E : Node_Or_Entity_Id) return Node_Id; |
| -- This is used to construct the string literal node representing a |
| -- default external name, i.e. one that is constructed from the name |
| -- of an entity, or (in the case of extended DEC import/export pragmas, |
| -- an identifier provided as the external name. Letters in the name are |
| -- according to the setting of Opt.External_Name_Default_Casing. |
| |
| procedure Get_Index_Bounds (N : Node_Id; L, H : out Node_Id); |
| -- This procedure assigns to L and H respectively the values of the |
| -- low and high bounds of node N, which must be a range, subtype |
| -- indication, or the name of a scalar subtype. The result in L, H |
| -- may be set to Error if there was an earlier error in the range. |
| |
| function Get_Enum_Lit_From_Pos |
| (T : Entity_Id; |
| Pos : Uint; |
| Loc : Source_Ptr) |
| return Entity_Id; |
| -- This function obtains the E_Enumeration_Literal entity for the |
| -- specified value from the enumneration type or subtype T. The |
| -- second argument is the Pos value, which is assumed to be in range. |
| -- The third argument supplies a source location for constructed |
| -- nodes returned by this function. |
| |
| function Get_Name_Entity_Id (Id : Name_Id) return Entity_Id; |
| -- An entity value is associated with each name in the name table. The |
| -- Get_Name_Entity_Id function fetches the Entity_Id of this entity, |
| -- which is the innermost visible entity with the given name. See the |
| -- body of Sem_Ch8 for further details on handling of entity visibility. |
| |
| function Get_Referenced_Object (N : Node_Id) return Node_Id; |
| -- Given a node, return the renamed object if the node represents |
| -- a renamed object, otherwise return the node unchanged. The node |
| -- may represent an arbitrary expression. |
| |
| function Get_Subprogram_Body (E : Entity_Id) return Node_Id; |
| -- Given the entity for a subprogram (E_Function or E_Procedure), |
| -- return the corresponding N_Subprogram_Body node. If the corresponding |
| -- body of the declaration is missing (as for an imported subprogram) |
| -- return Empty. |
| |
| function Get_Task_Body_Procedure (E : Entity_Id) return Node_Id; |
| pragma Inline (Get_Task_Body_Procedure); |
| -- Given an entity for a task type or subtype, retrieves the |
| -- Task_Body_Procedure field from the corresponding task type |
| -- declaration. |
| |
| function Has_Infinities (E : Entity_Id) return Boolean; |
| -- Determines if the range of the floating-point type E includes |
| -- infinities. Returns False if E is not a floating-point type. |
| |
| function Has_Private_Component (Type_Id : Entity_Id) return Boolean; |
| -- Check if a type has a (sub)component of a private type that has not |
| -- yet received a full declaration. |
| |
| function Has_Tagged_Component (Typ : Entity_Id) return Boolean; |
| -- Typ must be a composite type (array or record). This function is used |
| -- to check if '=' has to be expanded into a bunch component comparaisons. |
| |
| function In_Instance return Boolean; |
| -- Returns True if the current scope is within a generic instance. |
| |
| function In_Instance_Body return Boolean; |
| -- Returns True if current scope is within the body of an instance, where |
| -- several semantic checks (e.g. accessibility checks) are relaxed. |
| |
| function In_Instance_Not_Visible return Boolean; |
| -- Returns True if current scope is with the private part or the body of |
| -- an instance. Other semantic checks are suppressed in this context. |
| |
| function In_Instance_Visible_Part return Boolean; |
| -- Returns True if current scope is within the visible part of a package |
| -- instance, where several additional semantic checks apply. |
| |
| function In_Subprogram_Or_Concurrent_Unit return Boolean; |
| -- Determines if the current scope is within a subprogram compilation |
| -- unit (inside a subprogram declaration, subprogram body, or generic |
| -- subprogram declaration) or within a task or protected body. The test |
| -- is for appearing anywhere within such a construct (that is it does not |
| -- need to be directly within). |
| |
| function In_Visible_Part (Scope_Id : Entity_Id) return Boolean; |
| -- Determine whether a declaration occurs within the visible part of a |
| -- package specification. The package must be on the scope stack, and the |
| -- corresponding private part must not. |
| |
| function Is_AAMP_Float (E : Entity_Id) return Boolean; |
| -- Defined for all type entities. Returns True only for the base type |
| -- of float types with AAMP format. The particular format is determined |
| -- by the Digits_Value value which is 6 for the 32-bit floating point type, |
| -- or 9 for the 48-bit type. This is not an attribute function (like |
| -- VAX_Float) in order to not use up an extra flag and to prevent |
| -- the dependency of Einfo on Targparm which would be required for a |
| -- synthesized attribute. |
| |
| function Is_Dependent_Component_Of_Mutable_Object |
| (Object : Node_Id) |
| return Boolean; |
| -- Returns True if Object is the name of a subcomponent that |
| -- depends on discriminants of a variable whose nominal subtype |
| -- is unconstrained and not indefinite, and the variable is |
| -- not aliased. Otherwise returns False. The nodes passed |
| -- to this function are assumed to denote objects. |
| |
| function Is_Actual_Parameter (N : Node_Id) return Boolean; |
| -- Determines if N is an actual parameter in a subprogram call. |
| |
| function Is_Aliased_View (Obj : Node_Id) return Boolean; |
| -- Determine if Obj is an aliased view, i.e. the name of an |
| -- object to which 'Access or 'Unchecked_Access can apply. |
| |
| function Is_Atomic_Object (N : Node_Id) return Boolean; |
| -- Determines if the given node denotes an atomic object in the sense |
| -- of the legality checks described in RM C.6(12). |
| |
| function Is_False (U : Uint) return Boolean; |
| -- The argument is a Uint value which is the Boolean'Pos value of a |
| -- Boolean operand (i.e. is either 0 for False, or 1 for True). This |
| -- function simply tests if it is False (i.e. zero) |
| |
| function Is_Fixed_Model_Number (U : Ureal; T : Entity_Id) return Boolean; |
| -- Returns True iff the number U is a model number of the fixed- |
| -- point type T, i.e. if it is an exact multiple of Small. |
| |
| function Is_Fully_Initialized_Type (Typ : Entity_Id) return Boolean; |
| -- Typ is a type entity. This function returns true if this type is |
| -- fully initialized, meaning that an object of the type is fully |
| -- initialized. Note that initialization resulting from the use of |
| -- pragma Normalized_Scalars does not count. |
| |
| function Is_Inherited_Operation (E : Entity_Id) return Boolean; |
| -- E is a subprogram. Return True is E is an implicit operation inherited |
| -- by a derived type declarations. |
| |
| function Is_Library_Level_Entity (E : Entity_Id) return Boolean; |
| -- A library-level declaration is one that is accessible from Standard, |
| -- i.e. a library unit or an entity declared in a library package. |
| |
| function Is_Local_Variable_Reference (Expr : Node_Id) return Boolean; |
| -- Determines whether Expr is a refeference to a variable or IN OUT |
| -- mode parameter of the current enclosing subprogram. |
| |
| function Is_Object_Reference (N : Node_Id) return Boolean; |
| -- Determines if the tree referenced by N represents an object. Both |
| -- variable and constant objects return True (compare Is_Variable). |
| |
| function Is_OK_Variable_For_Out_Formal (AV : Node_Id) return Boolean; |
| -- Used to test if AV is an acceptable formal for an OUT or IN OUT |
| -- formal. Note that the Is_Variable function is not quite the right |
| -- test because this is a case in which conversions whose expression |
| -- is a variable (in the Is_Variable sense) with a non-tagged type |
| -- target are considered view conversions and hence variables. |
| |
| function Is_RCI_Pkg_Spec_Or_Body (Cunit : Node_Id) return Boolean; |
| -- Return True if a compilation unit is the specification or the |
| -- body of a remote call interface package. |
| |
| function Is_Remote_Access_To_Class_Wide_Type (E : Entity_Id) return Boolean; |
| -- Return True if E is a remote access-to-class-wide-limited_private type |
| |
| function Is_Remote_Access_To_Subprogram_Type (E : Entity_Id) return Boolean; |
| -- Return True if E is a remote access to subprogram type. |
| |
| function Is_Remote_Call (N : Node_Id) return Boolean; |
| -- Return True if N denotes a potentially remote call |
| |
| function Is_Selector_Name (N : Node_Id) return Boolean; |
| -- Given an N_Identifier node N, determines if it is a Selector_Name. |
| -- As described in Sinfo, Selector_Names are special because they |
| -- represent use of the N_Identifier node for a true identifier, when |
| -- normally such nodes represent a direct name. |
| |
| function Is_Statement (N : Node_Id) return Boolean; |
| -- Check if the node N is a statement node. Note that this includes |
| -- the case of procedure call statements (unlike the direct use of |
| -- the N_Statement_Other_Than_Procedure_Call subtype from Sinfo) |
| |
| function Is_Transfer (N : Node_Id) return Boolean; |
| -- Returns True if the node N is a statement which is known to cause |
| -- an unconditional transfer of control at runtime, i.e. the following |
| -- statement definitely will not be executed. |
| |
| function Is_True (U : Uint) return Boolean; |
| -- The argument is a Uint value which is the Boolean'Pos value of a |
| -- Boolean operand (i.e. is either 0 for False, or 1 for True). This |
| -- function simply tests if it is True (i.e. non-zero) |
| |
| function Is_Variable (N : Node_Id) return Boolean; |
| -- Determines if the tree referenced by N represents a variable, i.e. |
| -- can appear on the left side of an assignment. There is one situation, |
| -- namely formal parameters, in which non-tagged type conversions are |
| -- also considered variables, but Is_Variable returns False for such |
| -- cases, since it has no knowledge of the context. Note that this is |
| -- the point at which Assignment_OK is checked, and True is returned |
| -- for any tree thus marked. |
| |
| function Is_Volatile_Object (N : Node_Id) return Boolean; |
| -- Determines if the given node denotes an volatile object in the sense |
| -- of the legality checks described in RM C.6(12). |
| |
| procedure Kill_Size_Check_Code (E : Entity_Id); |
| -- Called when an address clause or pragma Import is applied to an |
| -- entity. If the entity is a variable or a constant, and size check |
| -- code is present, this size check code is killed, since the object |
| -- will not be allocated by the program. |
| |
| function New_External_Entity |
| (Kind : Entity_Kind; |
| Scope_Id : Entity_Id; |
| Sloc_Value : Source_Ptr; |
| Related_Id : Entity_Id; |
| Suffix : Character; |
| Suffix_Index : Nat := 0; |
| Prefix : Character := ' ') |
| return Entity_Id; |
| -- This function creates an N_Defining_Identifier node for an internal |
| -- created entity, such as an implicit type or subtype, or a record |
| -- initialization procedure. The entity name is constructed with a call |
| -- to New_External_Name (Related_Id, Suffix, Suffix_Index, Prefix), so |
| -- that the generated name may be referenced as a public entry, and the |
| -- Is_Public flag is set if needed (using Set_Public_Status). If the |
| -- entity is for a type or subtype, the size/align fields are initialized |
| -- to unknown (Uint_0). |
| |
| function New_Internal_Entity |
| (Kind : Entity_Kind; |
| Scope_Id : Entity_Id; |
| Sloc_Value : Source_Ptr; |
| Id_Char : Character) |
| return Entity_Id; |
| -- This function is similar to New_External_Entity, except that the |
| -- name is constructed by New_Internal_Name (Id_Char). This is used |
| -- when the resulting entity does not have to be referenced as a |
| -- public entity (and in this case Is_Public is not set). |
| |
| procedure Next_Actual (Actual_Id : in out Node_Id); |
| pragma Inline (Next_Actual); |
| -- Next_Actual (N) is equivalent to N := Next_Actual (N) |
| |
| function Next_Actual (Actual_Id : Node_Id) return Node_Id; |
| -- Find next actual parameter in declaration order. As described for |
| -- First_Actual, this is the next actual in the declaration order, not |
| -- the call order, so this does not correspond to simply taking the |
| -- next entry of the Parameter_Associations list. The argument is an |
| -- actual previously returned by a call to First_Actual or Next_Actual. |
| -- Note tha the result produced is always an expression, not a parameter |
| -- assciation node, even if named notation was used. |
| |
| procedure Normalize_Actuals |
| (N : Node_Id; |
| S : Entity_Id; |
| Report : Boolean; |
| Success : out Boolean); |
| -- Reorders lists of actuals according to names of formals, value returned |
| -- in Success indicates success of reordering. For more details, see body. |
| -- Errors are reported only if Report is set to True. |
| |
| procedure Note_Possible_Modification (N : Node_Id); |
| -- This routine is called if the sub-expression N maybe the target of |
| -- an assignment (e.g. it is the left side of an assignment, used as |
| -- an out parameters, or used as prefixes of access attributes). It |
| -- sets May_Be_Modified in the associated entity if there is one, |
| -- taking into account the rule that in the case of renamed objects, |
| -- it is the flag in the renamed object that must be set. |
| |
| function Object_Access_Level (Obj : Node_Id) return Uint; |
| -- Return the accessibility level of the view of the object Obj. |
| -- For convenience, qualified expressions applied to object names |
| -- are also allowed as actuals for this function. |
| |
| function Private_Component (Type_Id : Entity_Id) return Entity_Id; |
| -- Returns some private component (if any) of the given Type_Id. |
| -- Used to enforce the rules on visibility of operations on composite |
| -- types, that depend on the full view of the component type. For a |
| -- record type there may be several such components, we just return |
| -- the first one. |
| |
| procedure Process_End_Label (N : Node_Id; Typ : Character); |
| -- N is a node whose End_Label is to be processed, generating all |
| -- appropriate cross-reference entries, and performing style checks |
| -- for any identifier references in the end label. Typ is either |
| -- 'e' or 't indicating the type of the cross-reference entity |
| -- (e for spec, t for body, see Lib.Xref spec for details). |
| |
| function Real_Convert (S : String) return Node_Id; |
| -- S is a possibly signed syntactically valid real literal. The result |
| -- returned is an N_Real_Literal node representing the literal value. |
| |
| function Requires_Transient_Scope (Id : Entity_Id) return Boolean; |
| -- E is a type entity. The result is True when temporaries of this |
| -- type need to be wrapped in a transient scope to be reclaimed |
| -- properly when a secondary stack is in use. Examples of types |
| -- requiring such wrapping are controlled types and variable-sized |
| -- types including unconstrained arrays |
| |
| procedure Reset_Analyzed_Flags (N : Node_Id); |
| -- Reset the Analyzed flags in all nodes of the tree whose root is N |
| |
| function Same_Name (N1, N2 : Node_Id) return Boolean; |
| -- Determine if two (possibly expanded) names are the same name |
| |
| function Same_Type (T1, T2 : Entity_Id) return Boolean; |
| -- Determines if T1 and T2 represent exactly the same type. Two types |
| -- are the same if they are identical, or if one is an unconstrained |
| -- subtype of the other, or they are both common subtypes of the same |
| -- type with identical constraints. The result returned is conservative. |
| -- It is True if the types are known to be the same, but a result of |
| -- False is indecisive (e.g. the compiler may not be able to tell that |
| -- two constraints are identical). |
| |
| function Scope_Within_Or_Same (Scope1, Scope2 : Entity_Id) return Boolean; |
| -- Determines if the entity Scope1 is the same as Scope2, or if it is |
| -- inside it, where both entities represent scopes. Note that scopes |
| -- are only partially ordered, so Scope_Within_Or_Same (A,B) and |
| -- Scope_Within_Or_Same (B,A) can both be False for a given pair A,B. |
| |
| function Scope_Within (Scope1, Scope2 : Entity_Id) return Boolean; |
| -- Like Scope_Within_Or_Same, except that this function returns |
| -- False in the case where Scope1 and Scope2 are the same scope. |
| |
| procedure Set_Current_Entity (E : Entity_Id); |
| -- Establish the entity E as the currently visible definition of its |
| -- associated name (i.e. the Node_Id associated with its name) |
| |
| procedure Set_Entity_With_Style_Check (N : Node_Id; Val : Entity_Id); |
| -- This procedure has the same calling sequence as Set_Entity, but |
| -- if Style_Check is set, then it calls a style checking routine which |
| -- can check identifier spelling style. |
| |
| procedure Set_Name_Entity_Id (Id : Name_Id; Val : Entity_Id); |
| -- Sets the Entity_Id value associated with the given name, which is the |
| -- Id of the innermost visible entity with the given name. See the body |
| -- of package Sem_Ch8 for further details on the handling of visibility. |
| |
| procedure Set_Next_Actual (Ass1_Id : Node_Id; Ass2_Id : Node_Id); |
| -- The arguments may be parameter associations, whose descendants |
| -- are the optional formal name and the actual parameter. Positional |
| -- parameters are already members of a list, and do not need to be |
| -- chained separately. See also First_Actual and Next_Actual. |
| |
| procedure Set_Public_Status (Id : Entity_Id); |
| -- If an entity (visible or otherwise) is defined in a library |
| -- package, or a package that is itself public, then this subprogram |
| -- labels the entity public as well. |
| |
| procedure Set_Scope_Is_Transient (V : Boolean := True); |
| -- Set the flag Is_Transient of the current scope |
| |
| procedure Set_Size_Info (T1, T2 : Entity_Id); |
| -- Copies the Esize field and Has_Biased_Representation flag from |
| -- (sub)type entity T2 to (sub)type entity T1. Also copies the |
| -- Is_Unsigned_Type flag in the fixed-point and discrete cases, |
| -- and also copies the alignment value from T2 to T1. It does NOT |
| -- copy the RM_Size field, which must be separately set if this |
| -- is required to be copied also. |
| |
| function Scope_Is_Transient return Boolean; |
| -- True if the current scope is transient. |
| |
| function Static_Integer (N : Node_Id) return Uint; |
| -- This function analyzes the given expression node and then resolves it |
| -- as any integer type. If the result is static, then the value of the |
| -- universal expression is returned, otherwise an error message is output |
| -- and a value of No_Uint is returned. |
| |
| function Statically_Different (E1, E2 : Node_Id) return Boolean; |
| -- Return True if it can be statically determined that the Expressions |
| -- E1 and E2 refer to different objects |
| |
| function Subprogram_Access_Level (Subp : Entity_Id) return Uint; |
| -- Return the accessibility level of the view denoted by Subp. |
| |
| procedure Trace_Scope (N : Node_Id; E : Entity_Id; Msg : String); |
| -- Print debugging information on entry to each unit being analyzed. |
| |
| procedure Transfer_Entities (From : Entity_Id; To : Entity_Id); |
| -- Move a list of entities from one scope to another, and recompute |
| -- Is_Public based upon the new scope. |
| |
| function Type_Access_Level (Typ : Entity_Id) return Uint; |
| -- Return the accessibility level of Typ. |
| |
| function Unit_Declaration_Node (Unit_Id : Entity_Id) return Node_Id; |
| -- Unit_Id is the simple name of a program unit, this function returns |
| -- the corresponding xxx_Declaration node for the entity. Also applies |
| -- to the body entities for subprograms in tasks, in which case it |
| -- returns the subprogram or task body node for it. The unit may be |
| -- a child unit with any number of ancestors. |
| |
| function Within_Init_Proc return Boolean; |
| -- Determines if Current_Scope is within an Init_Proc |
| |
| procedure Wrong_Type (Expr : Node_Id; Expected_Type : Entity_Id); |
| -- Output error message for incorrectly typed expression. Expr is the |
| -- node for the incorrectly typed construct (Etype (Expr) is the type |
| -- found), and Expected_Type is the entity for the expected type. Note |
| -- that Expr does not have to be a subexpression, anything with an |
| -- Etype field may be used. |
| |
| private |
| pragma Inline (Current_Entity); |
| pragma Inline (Get_Name_Entity_Id); |
| pragma Inline (Is_False); |
| pragma Inline (Is_Statement); |
| pragma Inline (Is_True); |
| pragma Inline (Set_Current_Entity); |
| pragma Inline (Set_Name_Entity_Id); |
| pragma Inline (Set_Size_Info); |
| |
| end Sem_Util; |