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-------------------------------------------------------------------------------
--- --
--- GNAT RUN-TIME COMPONENTS --
--- --
--- A D A . C O M M A N D _ L I N E . R E M O V E --
--- --
--- S p e c --
--- --
--- Copyright (C) 1999-2009, 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. --
--- --
--- As a special exception under Section 7 of GPL version 3, you are granted --
--- additional permissions described in the GCC Runtime Library Exception, --
--- version 3.1, as published by the Free Software Foundation. --
--- --
--- You should have received a copy of the GNU General Public License and --
--- a copy of the GCC Runtime Library Exception along with this program; --
--- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
--- <http://www.gnu.org/licenses/>. --
--- --
--- GNAT was originally developed by the GNAT team at New York University. --
--- Extensive contributions were provided by Ada Core Technologies Inc. --
--- --
-------------------------------------------------------------------------------
-
--- This package is intended to be used in conjunction with its parent unit,
--- Ada.Command_Line. It provides facilities for logically removing arguments
--- from the command line, so that subsequent calls to Argument_Count and
--- Argument will reflect the removals.
-
--- For example, if the original command line has three arguments A B C, so
--- that Argument_Count is initially three, then after removing B, the second
--- argument, Argument_Count will be 2, and Argument (2) will return C.
-
-package Ada.Command_Line.Remove is
- pragma Preelaborate;
-
- procedure Remove_Argument (Number : Positive);
- -- Removes the argument identified by Number, which must be in the
- -- range 1 .. Argument_Count (i.e. an in range argument number which
- -- reflects removals). If Number is out of range Constraint_Error
- -- will be raised.
- --
- -- Note: the numbering of arguments greater than Number is affected
- -- by the call. If you need a loop through the arguments, removing
- -- some as you go, run the loop in reverse to avoid confusion from
- -- this renumbering:
- --
- -- for J in reverse 1 .. Argument_Count loop
- -- if Should_Remove (Arguments (J)) then
- -- Remove_Argument (J);
- -- end if;
- -- end loop;
- --
- -- Reversing the loop in this manner avoids the confusion.
-
- procedure Remove_Arguments (From : Positive; To : Natural);
- -- Removes arguments in the given From..To range. From must be in the
- -- range 1 .. Argument_Count and To in the range 0 .. Argument_Count.
- -- Constraint_Error is raised if either argument is out of range. If
- -- To is less than From, then the call has no effect.
-
- procedure Remove_Argument (Argument : String);
- -- Removes the argument which matches the given string Argument. Has
- -- no effect if no argument matches the string. If more than one
- -- argument matches the string, all are removed.
-
- procedure Remove_Arguments (Argument_Prefix : String);
- -- Removes all arguments whose prefix matches Argument_Prefix. Has
- -- no effect if no argument matches the string. For example a call
- -- to Remove_Arguments ("--") removes all arguments starting with --.
-
-end Ada.Command_Line.Remove;