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Diffstat (limited to 'gcc-4.2.1/gcc/ada/sem_ch12.ads')
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1 files changed, 129 insertions, 0 deletions
diff --git a/gcc-4.2.1/gcc/ada/sem_ch12.ads b/gcc-4.2.1/gcc/ada/sem_ch12.ads new file mode 100644 index 000000000..f9634bdff --- /dev/null +++ b/gcc-4.2.1/gcc/ada/sem_ch12.ads @@ -0,0 +1,129 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- S E M _ C H 1 2 -- +-- -- +-- S p e c -- +-- -- +-- Copyright (C) 1992-2005, 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, 51 Franklin Street, Fifth Floor, -- +-- Boston, MA 02110-1301, USA. -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +with Inline; use Inline; +with Types; use Types; + +package Sem_Ch12 is + procedure Analyze_Generic_Package_Declaration (N : Node_Id); + procedure Analyze_Generic_Subprogram_Declaration (N : Node_Id); + procedure Analyze_Package_Instantiation (N : Node_Id); + procedure Analyze_Procedure_Instantiation (N : Node_Id); + procedure Analyze_Function_Instantiation (N : Node_Id); + procedure Analyze_Formal_Object_Declaration (N : Node_Id); + procedure Analyze_Formal_Type_Declaration (N : Node_Id); + procedure Analyze_Formal_Subprogram (N : Node_Id); + procedure Analyze_Formal_Package (N : Node_Id); + + procedure Start_Generic; + -- Must be invoked before starting to process a generic spec or body + + procedure End_Generic; + -- Must be invoked just at the end of the end of the processing of a + -- generic spec or body. + + procedure Check_Generic_Child_Unit + (Gen_Id : Node_Id; + Parent_Installed : in out Boolean); + -- If the name of the generic unit in an instantiation or a renaming + -- is a selected component, then the prefix may be an instance and the + -- selector may designate a child unit. Retrieve the parent generic + -- and search for the child unit that must be declared within. Similarly, + -- if this is the name of a generic child unit within an instantiation of + -- its own parent, retrieve the parent generic. + + function Copy_Generic_Node + (N : Node_Id; + Parent_Id : Node_Id; + Instantiating : Boolean) + return Node_Id; + -- Copy the tree for a generic unit or its body. The unit is copied + -- repeatedly: once to produce a copy on which semantic analysis of + -- the generic is performed, and once for each instantiation. The tree + -- being copied is not semantically analyzed, except that references to + -- global entities are marked on terminal nodes. + + function Get_Instance_Of (A : Entity_Id) return Entity_Id; + -- Retrieve actual associated with given generic parameter. + -- If A is uninstantiated or not a generic parameter, return A. + + function Get_Package_Instantiation_Node (A : Entity_Id) return Node_Id; + -- Given the entity of a unit that is an instantiation, retrieve the + -- original instance node. This is used when loading the instantiations + -- of the ancestors of a child generic that is being instantiated. + + procedure Instantiate_Package_Body + (Body_Info : Pending_Body_Info; + Inlined_Body : Boolean := False); + -- Called after semantic analysis, to complete the instantiation of + -- package instances. The flag Inlined_Body is set if the body is + -- being instantiated on the fly for inlined purposes. + + procedure Instantiate_Subprogram_Body + (Body_Info : Pending_Body_Info); + -- Called after semantic analysis, to complete the instantiation of + -- function and procedure instances. + + procedure Save_Global_References (N : Node_Id); + -- Traverse the original generic unit, and capture all references to + -- entities that are defined outside of the generic in the analyzed + -- tree for the template. These references are copied into the original + -- tree, so that they appear automatically in every instantiation. + -- A critical invariant in this approach is that if an id in the generic + -- resolves to a local entity, the corresponding id in the instance + -- will resolve to the homologous entity in the instance, even though + -- the enclosing context for resolution is different, as long as the + -- global references have been captured as described here. + + -- Because instantiations can be nested, the environment of the instance, + -- involving the actuals and other data-structures, must be saved and + -- restored in stack-like fashion. Front-end inlining also uses these + -- structures for the management of private/full views. + + procedure Set_Copied_Sloc_For_Inlined_Body (N : Node_Id; E : Entity_Id); + -- This procedure is used when a subprogram body is inlined. This process + -- shares the same circuitry as the creation of an instantiated copy of + -- a generic template. The call to this procedure establishes a new source + -- file entry representing the inlined body as an instantiation, marked as + -- an inlined body (so that errout can distinguish cases for generating + -- error messages, otherwise the treatment is identical). In this call + -- N is the subprogram body and E is the defining identifier of the + -- subprogram in quiestion. The resulting Sloc adjustment factor is + -- saved as part of the internal state of the Sem_Ch12 package for use + -- in subsequent calls to copy nodes. + + procedure Save_Env + (Gen_Unit : Entity_Id; + Act_Unit : Entity_Id); + -- ??? comment needed + + procedure Restore_Env; + -- ??? comment needed + + procedure Initialize; + -- Initializes internal data structures + +end Sem_Ch12; |