Mercurial > hg > CbC > CbC_gcc
comparison gcc/ada/libgnat/s-valenu.ads @ 111:04ced10e8804
gcc 7
| author | kono |
|---|---|
| date | Fri, 27 Oct 2017 22:46:09 +0900 |
| parents | |
| children | 84e7813d76e9 |
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| 68:561a7518be6b | 111:04ced10e8804 |
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| 1 ------------------------------------------------------------------------------ | |
| 2 -- -- | |
| 3 -- GNAT COMPILER COMPONENTS -- | |
| 4 -- -- | |
| 5 -- S Y S T E M . V A L _ E N U M -- | |
| 6 -- -- | |
| 7 -- S p e c -- | |
| 8 -- -- | |
| 9 -- Copyright (C) 1992-2017, 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 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. -- | |
| 17 -- -- | |
| 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. -- | |
| 21 -- -- | |
| 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/>. -- | |
| 26 -- -- | |
| 27 -- GNAT was originally developed by the GNAT team at New York University. -- | |
| 28 -- Extensive contributions were provided by Ada Core Technologies Inc. -- | |
| 29 -- -- | |
| 30 ------------------------------------------------------------------------------ | |
| 31 | |
| 32 -- This package is used to compute the Value attribute for enumeration types | |
| 33 -- other than those in packages Standard and System. See unit Exp_Imgv for | |
| 34 -- details of the format of constructed image tables. | |
| 35 | |
| 36 package System.Val_Enum is | |
| 37 pragma Pure; | |
| 38 | |
| 39 function Value_Enumeration_8 | |
| 40 (Names : String; | |
| 41 Indexes : System.Address; | |
| 42 Num : Natural; | |
| 43 Str : String) | |
| 44 return Natural; | |
| 45 -- Used to compute Enum'Value (Str) where Enum is some enumeration type | |
| 46 -- other than those defined in package Standard. Names is a string with | |
| 47 -- a lower bound of 1 containing the characters of all the enumeration | |
| 48 -- literals concatenated together in sequence. Indexes is the address | |
| 49 -- of an array of type array (0 .. N) of Natural_8, where N is the | |
| 50 -- number of enumeration literals in the type. The Indexes values are | |
| 51 -- the starting subscript of each enumeration literal, indexed by Pos | |
| 52 -- values, with an extra entry at the end containing Names'Length + 1. | |
| 53 -- The parameter Num is the value N - 1 (i.e. Enum'Pos (Enum'Last)). | |
| 54 -- The reason that Indexes is passed by address is that the actual type | |
| 55 -- is created on the fly by the expander. | |
| 56 -- | |
| 57 -- Str is the argument of the attribute function, and may have leading | |
| 58 -- and trailing spaces, and letters can be upper or lower case or mixed. | |
| 59 -- If the image is found in Names, then the corresponding Pos value is | |
| 60 -- returned. If not, Constraint_Error is raised. | |
| 61 | |
| 62 function Value_Enumeration_16 | |
| 63 (Names : String; | |
| 64 Indexes : System.Address; | |
| 65 Num : Natural; | |
| 66 Str : String) | |
| 67 return Natural; | |
| 68 -- Identical to Value_Enumeration_8 except that it handles types | |
| 69 -- using array (0 .. Num) of Natural_16 for the Indexes table. | |
| 70 | |
| 71 function Value_Enumeration_32 | |
| 72 (Names : String; | |
| 73 Indexes : System.Address; | |
| 74 Num : Natural; | |
| 75 Str : String) | |
| 76 return Natural; | |
| 77 -- Identical to Value_Enumeration_8 except that it handles types | |
| 78 -- using array (0 .. Num) of Natural_32 for the Indexes table. | |
| 79 | |
| 80 end System.Val_Enum; |