gcc/ada/sem_ch5.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                              S E M _ C H 5                               --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2005, Free Software Foundation, Inc.         --
  10 --                                                                          --
  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.                                              --
  21 --                                                                          --
  22 -- GNAT was originally developed  by the GNAT team at  New York University. --
  23 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  24 --                                                                          --
  25 ------------------------------------------------------------------------------
  26
  27 with Types; use Types;
  28
  29 package Sem_Ch5 is
  30
  31    procedure Analyze_Assignment                 (N : Node_Id);
  32    procedure Analyze_Block_Statement            (N : Node_Id);
  33    procedure Analyze_Case_Statement             (N : Node_Id);
  34    procedure Analyze_Exit_Statement             (N : Node_Id);
  35    procedure Analyze_Goto_Statement             (N : Node_Id);
  36    procedure Analyze_If_Statement               (N : Node_Id);
  37    procedure Analyze_Implicit_Label_Declaration (N : Node_Id);
  38    procedure Analyze_Label                      (N : Node_Id);
  39    procedure Analyze_Loop_Statement             (N : Node_Id);
  40    procedure Analyze_Null_Statement             (N : Node_Id);
  41    procedure Analyze_Statements                 (L : List_Id);
  42
  43    procedure Analyze_Label_Entity (E : Entity_Id);
  44    --  This procedure performs direct analysis of the label entity E. It
  45    --  is used when a label is created by the expander without bothering
  46    --  to insert an N_Implicit_Label_Declaration in the tree. It also takes
  47    --  care of setting Reachable, since labels defined by the expander can
  48    --  be assumed to be reachable.
  49
  50    procedure Check_Possible_Current_Value_Condition (Cnode : Node_Id);
  51    --  Cnode is N_If_Statement, N_Elsif_Part, or N_Iteration_Scheme
  52    --  (the latter when a WHILE condition is present). This call checks
  53    --  if Condition (Cnode) is of the form ([NOT] var op val), where var
  54    --  is a simple object, val is known at compile time, and op is one
  55    --  of the six relational operators. If this is the case, and the
  56    --  Current_Value field of "var" is not set, then it is set to Cnode.
  57    --  See Exp_Util.Set_Current_Value_Condition for further details.
  58
  59    procedure Check_Unreachable_Code (N : Node_Id);
  60    --  This procedure is called with N being the node for a statement that
  61    --  is an unconditional transfer of control. It checks to see if the
  62    --  statement is followed by some other statement, and if so generates
  63    --  an appropriate warning for unreachable code.
  64
  65 end Sem_Ch5;