diff options
Diffstat (limited to 'gcc-4.3.1/gcc/ada/sem_ch6.ads')
| -rw-r--r-- | gcc-4.3.1/gcc/ada/sem_ch6.ads | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/gcc-4.3.1/gcc/ada/sem_ch6.ads b/gcc-4.3.1/gcc/ada/sem_ch6.ads new file mode 100644 index 000000000..071aa75c4 --- /dev/null +++ b/gcc-4.3.1/gcc/ada/sem_ch6.ads @@ -0,0 +1,214 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- S E M _ C H 6 -- +-- -- +-- S p e c -- +-- -- +-- Copyright (C) 1992-2007, 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 Types; use Types; +package Sem_Ch6 is + + type Conformance_Type is + (Type_Conformant, Mode_Conformant, Subtype_Conformant, Fully_Conformant); + -- Conformance type used in conformance checks between specs and bodies, + -- and for overriding. The literals match the RM definitions of the + -- corresponding terms. + + procedure Analyze_Abstract_Subprogram_Declaration (N : Node_Id); + procedure Analyze_Extended_Return_Statement (N : Node_Id); + procedure Analyze_Function_Call (N : Node_Id); + procedure Analyze_Operator_Symbol (N : Node_Id); + procedure Analyze_Parameter_Association (N : Node_Id); + procedure Analyze_Procedure_Call (N : Node_Id); + procedure Analyze_Simple_Return_Statement (N : Node_Id); + procedure Analyze_Subprogram_Declaration (N : Node_Id); + procedure Analyze_Subprogram_Body (N : Node_Id); + + function Analyze_Subprogram_Specification (N : Node_Id) return Entity_Id; + -- Analyze subprogram specification in both subprogram declarations + -- and body declarations. Returns the defining entity for the + -- specification N. + + procedure Cannot_Inline (Msg : String; N : Node_Id; Subp : Entity_Id); + -- This procedure is called if the node N, an instance of a call to + -- subprogram Subp, cannot be inlined. Msg is the message to be issued, + -- and has a ? as the last character. If Subp has a pragma Always_Inlined, + -- then an error message is issued (by removing the last character of Msg). + -- If Subp is not Always_Inlined, then a warning is issued if the flag + -- Ineffective_Inline_Warnings is set, and if not, the call has no effect. + + procedure Check_Conventions (Typ : Entity_Id); + -- Ada 2005 (AI-430): Check that the conventions of all inherited and + -- overridden dispatching operations of type Typ are consistent with + -- their respective counterparts. + + procedure Check_Delayed_Subprogram (Designator : Entity_Id); + -- Designator can be a E_Subprogram_Type, E_Procedure or E_Function. If a + -- type in its profile depends on a private type without a full + -- declaration, indicate that the subprogram or type is delayed. + + procedure Check_Discriminant_Conformance + (N : Node_Id; + Prev : Entity_Id; + Prev_Loc : Node_Id); + -- Check that the discriminants of a full type N fully conform to + -- the discriminants of the corresponding partial view Prev. + -- Prev_Loc indicates the source location of the partial view, + -- which may be different than Prev in the case of private types. + + procedure Check_Fully_Conformant + (New_Id : Entity_Id; + Old_Id : Entity_Id; + Err_Loc : Node_Id := Empty); + -- Check that two callable entitites (subprograms, entries, literals) + -- are fully conformant, post error message if not (RM 6.3.1(17)) with + -- the flag being placed on the Err_Loc node if it is specified, and + -- on the appropriate component of the New_Id construct if not. Note: + -- when checking spec/body conformance, New_Id must be the body entity + -- and Old_Id is the spec entity (the code in the implementation relies + -- on this ordering, and in any case, this makes sense, since if flags + -- are to be placed on the construct, they clearly belong on the body. + + procedure Check_Mode_Conformant + (New_Id : Entity_Id; + Old_Id : Entity_Id; + Err_Loc : Node_Id := Empty; + Get_Inst : Boolean := False); + -- Check that two callable entitites (subprograms, entries, literals) + -- are mode conformant, post error message if not (RM 6.3.1(15)) with + -- the flag being placed on the Err_Loc node if it is specified, and + -- on the appropriate component of the New_Id construct if not. The + -- argument Get_Inst is set to True when this is a check against a + -- formal access-to-subprogram type, indicating that mapping of types + -- is needed. + + procedure Check_Subtype_Conformant + (New_Id : Entity_Id; + Old_Id : Entity_Id; + Err_Loc : Node_Id := Empty); + -- Check that two callable entitites (subprograms, entries, literals) + -- are subtype conformant, post error message if not (RM 6.3.1(16)) + -- the flag being placed on the Err_Loc node if it is specified, and + -- on the appropriate component of the New_Id construct if not. + + procedure Check_Type_Conformant + (New_Id : Entity_Id; + Old_Id : Entity_Id; + Err_Loc : Node_Id := Empty); + -- Check that two callable entitites (subprograms, entries, literals) + -- are type conformant, post error message if not (RM 6.3.1(14)) with + -- the flag being placed on the Err_Loc node if it is specified, and + -- on the appropriate component of the New_Id construct if not. + + function Conforming_Types + (T1 : Entity_Id; + T2 : Entity_Id; + Ctype : Conformance_Type; + Get_Inst : Boolean := False) return Boolean; + -- Check that the types of two formal parameters are conforming. In most + -- cases this is just a name comparison, but within an instance it involves + -- generic actual types, and in the presence of anonymous access types + -- it must examine the designated types. + + procedure Create_Extra_Formals (E : Entity_Id); + -- For each parameter of a subprogram or entry that requires an additional + -- formal (such as for access parameters and indefinite discriminated + -- parameters), creates the appropriate formal and attach it to its + -- associated parameter. Each extra formal will also be appended to + -- the end of Subp's parameter list (with each subsequent extra formal + -- being attached to the preceding extra formal). + + function Find_Corresponding_Spec (N : Node_Id) return Entity_Id; + -- Use the subprogram specification in the body to retrieve the previous + -- subprogram declaration, if any. + + function Fully_Conformant (New_Id, Old_Id : Entity_Id) return Boolean; + -- Determine whether two callable entities (subprograms, entries, + -- literals) are fully conformant (RM 6.3.1(17)) + + function Fully_Conformant_Expressions + (Given_E1 : Node_Id; + Given_E2 : Node_Id) + return Boolean; + -- Determines if two (non-empty) expressions are fully conformant + -- as defined by (RM 6.3.1(18-21)) + + function Fully_Conformant_Discrete_Subtypes + (Given_S1 : Node_Id; + Given_S2 : Node_Id) + return Boolean; + -- Determines if two subtype definitions are fully conformant. Used + -- for entry family conformance checks (RM 6.3.1 (24)). + + function Mode_Conformant (New_Id, Old_Id : Entity_Id) return Boolean; + -- Determine whether two callable entities (subprograms, entries, + -- literals) are mode conformant (RM 6.3.1(15)) + + procedure New_Overloaded_Entity + (S : Entity_Id; + Derived_Type : Entity_Id := Empty); + -- Process new overloaded entity. Overloaded entities are created by + -- enumeration type declarations, subprogram specifications, entry + -- declarations, and (implicitly) by type derivations. Derived_Type non- + -- Empty indicates that this is subprogram derived for that type. + + procedure Process_Formals (T : List_Id; Related_Nod : Node_Id); + -- Enter the formals in the scope of the subprogram or entry, and + -- analyze default expressions if any. The implicit types created for + -- access parameter are attached to the Related_Nod which comes from the + -- context. + + procedure Reference_Body_Formals (Spec : Entity_Id; Bod : Entity_Id); + -- If there is a separate spec for a subprogram or generic subprogram, the + -- formals of the body are treated as references to the corresponding + -- formals of the spec. This reference does not count as an actual use of + -- the formal, in order to diagnose formals that are unused in the body. + -- This procedure is also used in renaming_as_body declarations, where + -- the formals of the specification must be treated as body formals that + -- correspond to the previous subprogram declaration, and not as new + -- entities with their defining entry in the cross-reference information. + + procedure Set_Actual_Subtypes (N : Node_Id; Subp : Entity_Id); + -- If the formals of a subprogram are unconstrained, build a subtype + -- declaration that uses the bounds or discriminants of the actual to + -- construct an actual subtype for them. This is an optimization that + -- is done only in some cases where the actual subtype cannot change + -- during execution of the subprogram. By setting the actual subtype + -- once, we avoid recomputing it unnecessarily. + + procedure Set_Formal_Mode (Formal_Id : Entity_Id); + -- Set proper Ekind to reflect formal mode (in, out, in out) + + function Subtype_Conformant (New_Id, Old_Id : Entity_Id) return Boolean; + -- Determine whether two callable entities (subprograms, entries, + -- literals) are subtype conformant (RM6.3.1(16)). + + function Type_Conformant + (New_Id : Entity_Id; + Old_Id : Entity_Id; + Skip_Controlling_Formals : Boolean := False) return Boolean; + -- Determine whether two callable entities (subprograms, entries, + -- literals) are type conformant (RM6.3.1(14)). + + procedure Valid_Operator_Definition (Designator : Entity_Id); + -- Verify that an operator definition has the proper number of formals + +end Sem_Ch6; |