+++ /dev/null
-------------------------------------------------------------------------------
--- --
--- GNAT COMPILER COMPONENTS --
--- --
--- S E M _ U T I L --
--- --
--- S p e c --
--- --
--- $Revision: 1.3.10.1 $
--- --
--- 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. --
--- Extensive contributions were provided by Ada Core Technologies Inc. --
--- --
-------------------------------------------------------------------------------
-
--- 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;
projects / msp430-gcc.git / blobdiff