From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- gcc/ada/sem_ch12.ads | 176 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 176 insertions(+) create mode 100644 gcc/ada/sem_ch12.ads (limited to 'gcc/ada/sem_ch12.ads') diff --git a/gcc/ada/sem_ch12.ads b/gcc/ada/sem_ch12.ads new file mode 100644 index 000000000..676be37e3 --- /dev/null +++ b/gcc/ada/sem_ch12.ads @@ -0,0 +1,176 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- S E M _ C H 1 2 -- +-- -- +-- S p e c -- +-- -- +-- Copyright (C) 1992-2010, 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 3, 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 COPYING3. If not, go to -- +-- http://www.gnu.org/licenses for a complete copy of the license. -- +-- -- +-- 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_Declaration (N : Node_Id); + procedure Analyze_Formal_Package_Declaration (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. If the parent is installed as a result of + -- this call, then Parent_Installed is set True, otherwise Parent_Installed + -- is unchanged by the call. + + 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. Note that this function + -- copies any aspect specifications from the input node N to the returned + -- node, as well as the setting of the Has_Aspects flag. + + 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; + Body_Optional : 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. + -- + -- The flag Body_Optional indicates that the call is for an instance + -- that precedes the current instance in the same declarative part. + -- This call is needed when instantiating a nested generic whose body + -- is to be found in the body of an instance. Normally we instantiate + -- package bodies only when they appear in the main unit, or when their + -- contents are needed for a nested generic G. If unit U contains several + -- instances I1, I2, etc. and I2 contains a nested generic, then when U + -- appears in the context of some other unit P that contains an instance + -- of G, we compile the body of I2, but not that of I1. However, when we + -- compile U as the main unit, we compile both bodies. This will lead to + -- lead to link-time errors if the compilation of I1 generates public + -- symbols, because those in I2 will receive different names in both + -- cases. This forces us to analyze the body of I1 even when U is not the + -- main unit. We don't want this additional mechanism to generate an error + -- when the body of the generic for I1 is not present, and this is the + -- reason for the presence of the flag Body_Optional, which is exchanged + -- between the current procedure and Load_Parent_Of_Generic. + + procedure Instantiate_Subprogram_Body + (Body_Info : Pending_Body_Info; + Body_Optional : Boolean := False); + -- Called after semantic analysis, to complete the instantiation of + -- function and procedure instances. The flag Body_Optional has the + -- same purpose as described for Instantiate_Package_Body. + + function Need_Subprogram_Instance_Body + (N : Node_Id; + Subp : Entity_Id) return Boolean; + + -- If a subprogram instance is inlined, indicate that the body of it + -- must be created, to be used in inlined calls by the back-end. The + -- subprogram may be inlined because the generic itself carries the + -- pragma, or because a pragma appears for the instance in the scope. + -- of the instance. + + 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 question. 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 + + procedure Check_Private_View (N : Node_Id); + -- Check whether the type of a generic entity has a different view between + -- the point of generic analysis and the point of instantiation. If the + -- view has changed, then at the point of instantiation we restore the + -- correct view to perform semantic analysis of the instance, and reset + -- the current view after instantiation. The processing is driven by the + -- current private status of the type of the node, and Has_Private_View, + -- a flag that is set at the point of generic compilation. If view and + -- flag are inconsistent then the type is updated appropriately. + -- + -- This subprogram is used in Check_Generic_Actuals and Copy_Generic_Node, + -- and is exported here for the purpose of front-end inlining (see Exp_Ch6. + -- Expand_Inlined_Call.Process_Formals). + +end Sem_Ch12; -- cgit v1.2.3