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1996-09-28
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3KB
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46 lines
------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- S Y S T E M . V A L _ E N U M --
-- --
-- S p e c --
-- --
-- $Revision: 1.6 $ --
-- --
-- Copyright (c) 1992,1993,1994 NYU, All Rights Reserved --
-- --
-- The GNAT library is free software; you can redistribute it and/or modify --
-- it under terms of the GNU Library General Public License as published by --
-- the Free Software Foundation; either version 2, or (at your option) any --
-- later version. The GNAT library is distributed in the hope that it will --
-- be useful, but WITHOUT ANY WARRANTY; without even the implied warranty --
-- of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU --
-- Library General Public License for more details. You should have --
-- received a copy of the GNU Library General Public License along with --
-- the GNAT library; see the file COPYING.LIB. If not, write to the Free --
-- Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. --
-- --
------------------------------------------------------------------------------
package System.Val_Enum is
pragma Pure (Val_Enum);
function Value_Enumeration
(A : Address;
Last_Pos : Natural;
Str : String)
return Natural;
-- Used in computing Enum'Value (Str) where Enum is some enumeration type
-- other thanBoolean or Character. A is the address of the Lit_Name_Table,
-- which is the table of access to strings, generated by Gigi for each
-- enumeration type. The table is an array whose index values are 'Pos
-- values and whose values are access to strings which are are the 'Image
-- values. Last_Pos is the last index in the table for the enumeration
-- type. This function will search the table looking for a match against
-- Str, and if one is found the position number in the table is returned.
-- If not, Constraint_Error is raised. Str may have leading and trailing
-- spaces and may be in upper or lower case.
end System.Val_Enum;