Ada 编程/库/Ada.Strings.Maps

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---

此语言功能从 Ada 95 开始可用。

Ada.Strings.Maps 是 预定义语言环境 自 Ada 95 以来的一部分。

规范

--                     Standard Ada library specification
--   Copyright (c) 2003-2018 Maxim Reznik <reznikmm@gmail.com>
--   Copyright (c) 2004-2016 AXE Consultants
--   Copyright (c) 2004, 2005, 2006 Ada-Europe
--   Copyright (c) 2000 The MITRE Corporation, Inc.
--   Copyright (c) 1992, 1993, 1994, 1995 Intermetrics, Inc.
--   SPDX-License-Identifier: BSD-3-Clause and LicenseRef-AdaReferenceManual
-- -------------------------------------------------------------------------

package Ada.Strings.Maps is
   pragma Pure (Maps);

   --  Representation for a set of character values:
   type Character_Set is private;
   pragma Preelaborable_Initialization (Character_Set);

   Null_Set : constant Character_Set;

   type Character_Range is
      record
         Low  : Character;
         High : Character;
      end record;
   --  Represents Character range Low..High

   type Character_Ranges is
     array (Positive range <>) of Character_Range;

   function To_Set
     (Ranges : in Character_Ranges) return Character_Set;

   function To_Set    (Span   : in Character_Range) return Character_Set;

   function To_Ranges
     (Set    : in Character_Set) return Character_Ranges;

   function "="   (Left, Right : in Character_Set) return Boolean;

   function "not" (Right : in Character_Set)       return Character_Set;
   function "and" (Left, Right : in Character_Set) return Character_Set;
   function "or"  (Left, Right : in Character_Set) return Character_Set;
   function "xor" (Left, Right : in Character_Set) return Character_Set;
   function "-"   (Left, Right : in Character_Set) return Character_Set;

   function Is_In (Element : in Character;
                   Set     : in Character_Set)
                  return Boolean;

   function Is_Subset (Elements : in Character_Set;
                       Set      : in Character_Set)
                      return Boolean;

   function "<=" (Left  : in Character_Set;
                  Right : in Character_Set)
                 return Boolean renames Is_Subset;

   --  Alternative representation for a set of character values:
   subtype Character_Sequence is String;

   function To_Set
     (Sequence  : in Character_Sequence)return Character_Set;

   function To_Set (Singleton : in Character)     return Character_Set;

   function To_Sequence
     (Set  : in Character_Set) return Character_Sequence;

   --  Representation for a character to character mapping:
   type Character_Mapping is private;
   pragma Preelaborable_Initialization (Character_Mapping);

   function Value (Map     : in Character_Mapping;
                   Element : in Character)
                  return Character;

   Identity : constant Character_Mapping;

   function To_Mapping (From, To : in Character_Sequence)
                       return Character_Mapping;

   function To_Domain (Map : in Character_Mapping)
                      return Character_Sequence;
   function To_Range  (Map : in Character_Mapping)
                      return Character_Sequence;

   type Character_Mapping_Function is
     access function (From : in Character) return Character;

private

   pragma Import (Ada, Character_Set);
   pragma Import (Ada, Null_Set);
   pragma Import (Ada, Character_Mapping);
   pragma Import (Ada, Identity);

end Ada.Strings.Maps;

另请参阅

华夏公益教科书

• Ada 编程/库/Ada
• Ada 编程/字符串

外部示例

• 在以下位置搜索 Ada.Strings.Maps 的示例：Rosetta 代码，GitHub (片段)，任何 Alire 包 或 本华夏公益教科书。
• 在以下位置搜索与 Ada.Strings.Maps 相关的帖子：Stack Overflow，comp.lang.ada 或 任何与 Ada 相关的页面。

Ada 参考手册

Ada 95

• A.4.2: 包 Strings.Maps ^[注释]

Ada 2005

• A.4.2: 包 Strings.Maps ^[注释]

Ada 2012

• A.4.2: 包 Strings.Maps ^[注释]

开源实现

FSF GNAT

• 规范：a-strmap.ads
• 主体：a-strmap.adb

drake

• 规范：strings/a-strmap.ads
• 主体：strings/a-strmap.adb