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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- S P R I N T --
-- --
-- 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. --
-- --
------------------------------------------------------------------------------
-- 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)
-- Could use more documentation for all of these ???
-- 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 ]
-- Implicit call to run time routine $routine-name
-- Implicit exportation $pragma import (...)
-- Implicit importation $pragma export (...)
-- Interpretation interpretation type [, entity]
-- Intrinsic calls function-name!(arg, arg, arg)
-- Itype declaration [(sub)type declaration without ;]
-- 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
-- Pop exception label %pop_xxx_exception_label
-- Push exception label %push_xxx_exception_label (label)
-- Raise xxx error [xxx_error [when cond]]
-- Raise xxx error with msg [xxx_error [when cond], "msg"]
-- 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)
-- Static declaration name : static xxx
-- 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 (Arg : Union_Id);
pragma Export (Ada, pg);
-- Print generated source for argument N (like -gnatdg output). Intended
-- only for use from gdb for debugging purposes. Currently, Arg may be a
-- List_Id or a Node_Id (anything else outputs a blank line).
procedure po (Arg : Union_Id);
pragma Export (Ada, po);
-- Like pg, but prints original source for the argument (like -gnatdo
-- output). Intended only for use from gdb for debugging purposes.
procedure ps (Arg : Union_Id);
pragma Export (Ada, ps);
-- Like pg, but prints generated and original source for the argument (like
-- -gnatds output). Intended only for use from gdb for debugging purposes.
end Sprint;
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