1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2006, Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 2, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, USA. --
22 -- GNAT was originally developed by the GNAT team at New York University. --
23 -- Extensive contributions were provided by Ada Core Technologies Inc. --
25 ------------------------------------------------------------------------------
27 with Types; use Types;
30 type Conformance_Type is
31 (Type_Conformant, Mode_Conformant, Subtype_Conformant, Fully_Conformant);
32 -- Conformance type used in conformance checks between specs and bodies,
33 -- and for overriding. The literals match the RM definitions of the
34 -- corresponding terms.
36 procedure Analyze_Abstract_Subprogram_Declaration (N : Node_Id);
37 procedure Analyze_Extended_Return_Statement (N : Node_Id);
38 procedure Analyze_Function_Call (N : Node_Id);
39 procedure Analyze_Operator_Symbol (N : Node_Id);
40 procedure Analyze_Parameter_Association (N : Node_Id);
41 procedure Analyze_Procedure_Call (N : Node_Id);
42 procedure Analyze_Return_Statement (N : Node_Id);
43 procedure Analyze_Subprogram_Declaration (N : Node_Id);
44 procedure Analyze_Subprogram_Body (N : Node_Id);
46 function Analyze_Subprogram_Specification (N : Node_Id) return Entity_Id;
47 -- Analyze subprogram specification in both subprogram declarations
48 -- and body declarations. Returns the defining entity for the
51 procedure Cannot_Inline (Msg : String; N : Node_Id; Subp : Entity_Id);
52 -- This procedure is called if the node N, an instance of a call to
53 -- subprogram Subp, cannot be inlined. Msg is the message to be issued,
54 -- and has a ? as the last character. If Subp has a pragma Always_Inlined,
55 -- then an error message is issued (by removing the last character of Msg).
56 -- If Subp is not Always_Inlined, then a warning is issued if the flag
57 -- Ineffective_Inline_Warnings is set, and if not, the call has no effect.
59 procedure Check_Conventions (Typ : Entity_Id);
60 -- Ada 2005 (AI-430): Check that the conventions of all inherited and
61 -- overridden dispatching operations of type Typ are consistent with
62 -- their respective counterparts.
64 procedure Check_Delayed_Subprogram (Designator : Entity_Id);
65 -- Designator can be a E_Subprogram_Type, E_Procedure or E_Function. If a
66 -- type in its profile depends on a private type without a full
67 -- declaration, indicate that the subprogram or type is delayed.
69 procedure Check_Discriminant_Conformance
73 -- Check that the discriminants of a full type N fully conform to
74 -- the discriminants of the corresponding partial view Prev.
75 -- Prev_Loc indicates the source location of the partial view,
76 -- which may be different than Prev in the case of private types.
78 procedure Check_Fully_Conformant
81 Err_Loc : Node_Id := Empty);
82 -- Check that two callable entitites (subprograms, entries, literals)
83 -- are fully conformant, post error message if not (RM 6.3.1(17)) with
84 -- the flag being placed on the Err_Loc node if it is specified, and
85 -- on the appropriate component of the New_Id construct if not. Note:
86 -- when checking spec/body conformance, New_Id must be the body entity
87 -- and Old_Id is the spec entity (the code in the implementation relies
88 -- on this ordering, and in any case, this makes sense, since if flags
89 -- are to be placed on the construct, they clearly belong on the body.
91 procedure Check_Mode_Conformant
94 Err_Loc : Node_Id := Empty;
95 Get_Inst : Boolean := False);
96 -- Check that two callable entitites (subprograms, entries, literals)
97 -- are mode conformant, post error message if not (RM 6.3.1(15)) with
98 -- the flag being placed on the Err_Loc node if it is specified, and
99 -- on the appropriate component of the New_Id construct if not. The
100 -- argument Get_Inst is set to True when this is a check against a
101 -- formal access-to-subprogram type, indicating that mapping of types
104 procedure Check_Subtype_Conformant
107 Err_Loc : Node_Id := Empty);
108 -- Check that two callable entitites (subprograms, entries, literals)
109 -- are subtype conformant, post error message if not (RM 6.3.1(16))
110 -- the flag being placed on the Err_Loc node if it is specified, and
111 -- on the appropriate component of the New_Id construct if not.
113 procedure Check_Type_Conformant
116 Err_Loc : Node_Id := Empty);
117 -- Check that two callable entitites (subprograms, entries, literals)
118 -- are type conformant, post error message if not (RM 6.3.1(14)) with
119 -- the flag being placed on the Err_Loc node if it is specified, and
120 -- on the appropriate component of the New_Id construct if not.
122 function Conforming_Types
125 Ctype : Conformance_Type;
126 Get_Inst : Boolean := False) return Boolean;
127 -- Check that the types of two formal parameters are conforming. In most
128 -- cases this is just a name comparison, but within an instance it involves
129 -- generic actual types, and in the presence of anonymous access types
130 -- it must examine the designated types.
132 procedure Create_Extra_Formals (E : Entity_Id);
133 -- For each parameter of a subprogram or entry that requires an additional
134 -- formal (such as for access parameters and indefinite discriminated
135 -- parameters), creates the appropriate formal and attach it to its
136 -- associated parameter. Each extra formal will also be appended to
137 -- the end of Subp's parameter list (with each subsequent extra formal
138 -- being attached to the preceding extra formal).
140 function Find_Corresponding_Spec (N : Node_Id) return Entity_Id;
141 -- Use the subprogram specification in the body to retrieve the previous
142 -- subprogram declaration, if any.
144 function Fully_Conformant (New_Id, Old_Id : Entity_Id) return Boolean;
145 -- Determine whether two callable entities (subprograms, entries,
146 -- literals) are fully conformant (RM 6.3.1(17))
148 function Fully_Conformant_Expressions
152 -- Determines if two (non-empty) expressions are fully conformant
153 -- as defined by (RM 6.3.1(18-21))
155 function Fully_Conformant_Discrete_Subtypes
159 -- Determines if two subtype definitions are fully conformant. Used
160 -- for entry family conformance checks (RM 6.3.1 (24)).
162 function Mode_Conformant (New_Id, Old_Id : Entity_Id) return Boolean;
163 -- Determine whether two callable entities (subprograms, entries,
164 -- literals) are mode conformant (RM 6.3.1(15))
166 procedure New_Overloaded_Entity
168 Derived_Type : Entity_Id := Empty);
169 -- Process new overloaded entity. Overloaded entities are created by
170 -- enumeration type declarations, subprogram specifications, entry
171 -- declarations, and (implicitly) by type derivations. Derived_Type non-
172 -- Empty indicates that this is subprogram derived for that type.
174 procedure Process_Formals (T : List_Id; Related_Nod : Node_Id);
175 -- Enter the formals in the scope of the subprogram or entry, and
176 -- analyze default expressions if any. The implicit types created for
177 -- access parameter are attached to the Related_Nod which comes from the
180 procedure Set_Actual_Subtypes (N : Node_Id; Subp : Entity_Id);
181 -- If the formals of a subprogram are unconstrained, build a subtype
182 -- declaration that uses the bounds or discriminants of the actual to
183 -- construct an actual subtype for them. This is an optimization that
184 -- is done only in some cases where the actual subtype cannot change
185 -- during execution of the subprogram. By setting the actual subtype
186 -- once, we avoid recomputing it unnecessarily.
188 procedure Set_Formal_Mode (Formal_Id : Entity_Id);
189 -- Set proper Ekind to reflect formal mode (in, out, in out)
191 function Subtype_Conformant (New_Id, Old_Id : Entity_Id) return Boolean;
192 -- Determine whether two callable entities (subprograms, entries,
193 -- literals) are subtype conformant (RM6.3.1(16)).
195 function Type_Conformant
198 Skip_Controlling_Formals : Boolean := False) return Boolean;
199 -- Determine whether two callable entities (subprograms, entries,
200 -- literals) are type conformant (RM6.3.1(14)).
202 procedure Valid_Operator_Definition (Designator : Entity_Id);
203 -- Verify that an operator definition has the proper number of formals