New Language: Ada

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@45959 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 148 insertions, 0 deletions

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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                               S P R I N T                                --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--                            $Revision: 1.44 $
+--                                                                          --
+--          Copyright (C) 1992-1999, 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,  59 Temple Place - Suite 330,  Boston, --
+-- MA 02111-1307, USA.                                                      --
+--                                                                          --
+-- GNAT was originally developed  by the GNAT team at  New York University. --
+-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This package (source print) contains routines for printing the source
+--  program corresponding to a specified syntax tree. These routines are
+--  intended for debugging use in the compiler (not as a user level pretty
+--  print tool). Only information present in the tree is output (e.g. no
+--  comments are present in the output), and as far as possible we avoid
+--  making any assumptions about the correctness of the tree, so a bad
+--  tree may either blow up on a debugging check, or list incorrect source.
+
+with Types; use Types;
+package Sprint is
+
+   -----------------------
+   -- Syntax Extensions --
+   -----------------------
+
+   --  When the generated tree is printed, it contains constructs that are not
+   --  pure Ada. For convenience, syntactic extensions to Ada have been defined
+   --  purely for the purposes of this printout (they are not recognized by the
+   --  parser)
+
+   --    Allocator                           new xxx [storage_pool = xxx]
+   --    Cleanup action                      at end procedure name;
+   --    Conditional expression              (if expr then expr else expr)
+   --    Conversion wi Float_Truncate        target^(source)
+   --    Convert wi Conversion_OK            target?(source)
+   --    Convert wi Rounded_Result           target@(source)
+   --    Divide wi Treat_Fixed_As_Integer    x #/ y
+   --    Divide wi Rounded_Result            x @/ y
+   --    Expression with range check         {expression}
+   --    Operator with range check           {operator} (e.g. {+})
+   --    Free statement                      free expr [storage_pool = xxx]
+   --    Freeze entity with freeze actions   freeze entityname [ actions ]
+   --    Interpretation                      interpretation type [, entity]
+   --    Intrinsic calls                     function-name!(arg, arg, arg)
+   --    Itype reference                     reference itype
+   --    Label declaration                   labelname : label
+   --    Mod wi Treat_Fixed_As_Integer       x #mod y
+   --    Multiple concatenation              expr && expr && expr ... && expr
+   --    Multiply wi Treat_Fixed_As_Integer  x #* y
+   --    Multiply wi Rounded_Result          x @* y
+   --    Others choice for cleanup           when all others
+   --    Raise xxx error                     [xxx_error [when condition]]
+   --    Rational literal                    See UR_Write for details
+   --    Rem wi Treat_Fixed_As_Integer       x #rem y
+   --    Reference                           expression'reference
+   --    Shift nodes                         shift_name!(expr, count)
+   --    Subprogram_Info                     subprog'Subprogram_Info
+   --    Unchecked conversion                target_type!(source_expression)
+   --    Unchecked expression                `(expression)
+   --    Validate_Unchecked_Conversion       validate unchecked_conversion
+   --                                                  (src-type, target-typ);
+
+   --  Note: the storage_pool parameters for allocators and the free node
+   --  are omitted if the Storage_Pool field is Empty, indicating use of
+   --  the standard default pool.
+
+   -----------------
+   -- Subprograms --
+   -----------------
+
+   procedure Source_Dump;
+   --  This routine is called from the GNAT main program to dump source as
+   --  requested by debug options. The relevant debug options are:
+   --    -ds  print source from tree, both original and generated code
+   --    -dg  print source from tree, including only the generated code
+   --    -do  print source from tree, including only the original code
+   --    -df  modify the above to include all units, not just the main unit
+   --    -sz  print source from tree for package Standard
+
+   procedure Sprint_Comma_List (List : List_Id);
+   --  Prints the nodes in a list, with separating commas. If the list
+   --  is empty then no output is generated.
+
+   procedure Sprint_Paren_Comma_List (List : List_Id);
+   --  Prints the nodes in a list, surrounded by parentheses, and separated
+   --  by comas. If the list is empty, then no output is generated. A blank
+   --  is output before the initial left parenthesis.
+
+   procedure Sprint_Opt_Paren_Comma_List (List : List_Id);
+   --  Same as normal Sprint_Paren_Comma_List procedure, except that
+   --  an extra blank is output if List is non-empty, and nothing at all is
+   --  printed it the argument is No_List.
+
+   procedure Sprint_Node_List (List : List_Id);
+   --  Prints the nodes in a list with no separating characters. This is used
+   --  in the case of lists of items which are printed on separate lines using
+   --  the current indentation amount. Note that Sprint_Node_List itself
+   --  does not generate any New_Line calls.
+
+   procedure Sprint_Opt_Node_List (List : List_Id);
+   --  Like Sprint_Node_List, but prints nothing if List = No_List.
+
+   procedure Sprint_Indented_List (List : List_Id);
+   --  Like Sprint_Line_List, except that the indentation level is
+   --  increased before outputting the list of items, and then decremented
+   --  (back to its original level) before returning to the caller.
+
+   procedure Sprint_Node (Node : Node_Id);
+   --  Prints a single node. No new lines are output, except as required for
+   --  splitting lines that are too long to fit on a single physical line.
+   --  No output is generated at all if Node is Empty. No trailing or leading
+   --  blank characters are generated.
+
+   procedure Sprint_Opt_Node (Node : Node_Id);
+   --  Same as normal Sprint_Node procedure, except that one leading
+   --  blank is output before the node if it is non-empty.
+
+   procedure PG (Node : Node_Id);
+   --  Print generated source for node N (like -gnatdg output). This is
+   --  intended only for use from gdb for debugging purposes.
+
+   procedure PO (Node : Node_Id);
+   --  Print original source for node N (like -gnatdo output). This is
+   --  intended only for use from gdb for debugging purposes.
+
+   procedure PS (Node : Node_Id);
+   --  Print generated and original source for node N (like -gnatds output).
+   --  This is intended only for use from gdb for debugging purposes.
+
+end Sprint;