1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME COMPONENTS --
5 -- S Y S T E M . S T R I N G _ O P S _ C O N C A T _ 3 --
9 -- Copyright (C) 1992-2017, 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 3, 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. --
18 -- As a special exception under Section 7 of GPL version 3, you are granted --
19 -- additional permissions described in the GCC Runtime Library Exception, --
20 -- version 3.1, as published by the Free Software Foundation. --
22 -- You should have received a copy of the GNU General Public License and --
23 -- a copy of the GCC Runtime Library Exception along with this program; --
24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
25 -- <http://www.gnu.org/licenses/>. --
27 -- GNAT was originally developed by the GNAT team at New York University. --
28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
30 ------------------------------------------------------------------------------
32 -- NOTE: This package is obsolescent. It is no longer used by the compiler
33 -- which now generates concatenation inline. It is retained only because
34 -- it may be used during bootstrapping using old versions of the compiler.
36 pragma Compiler_Unit_Warning
;
38 package body System
.String_Ops_Concat_3
is
44 function Str_Concat_3
(S1
, S2
, S3
: String) return String is
51 L12
: constant Natural := S1
'Length + S2
'Length;
52 L13
: constant Natural := L12
+ S3
'Length;
53 R
: String (S1
'First .. S1
'First + L13
- 1);
56 R
(S1
'First .. S1
'Last) := S1
;
57 R
(S1
'Last + 1 .. S1
'First + L12
- 1) := S2
;
58 R
(S1
'First + L12
.. R
'Last) := S3
;
64 end System
.String_Ops_Concat_3
;