Ada 编程/库/Ada.Characters.Handling

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此语言特性自 Ada 95 起可用。

Ada.Characters.Handling 是 预定义语言环境 自 Ada 95 起的一个单元。

规范

--                     Standard Ada library specification
--   Copyright (c) 2003-2018 Maxim Reznik <[email protected]>
--   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
-- -------------------------------------------------------------------------

with Ada.Characters.Conversions;

package Ada.Characters.Handling is
   pragma Pure (Handling);

   --   Character classification functions

   function Is_Control           (Item : in Character) return Boolean;
   function Is_Graphic           (Item : in Character) return Boolean;
   function Is_Letter            (Item : in Character) return Boolean;
   function Is_Lower             (Item : in Character) return Boolean;
   function Is_Upper             (Item : in Character) return Boolean;
   function Is_Basic             (Item : in Character) return Boolean;
   function Is_Digit             (Item : in Character) return Boolean;
   function Is_Decimal_Digit     (Item : in Character) return Boolean
     renames Is_Digit;
   function Is_Hexadecimal_Digit (Item : in Character) return Boolean;
   function Is_Alphanumeric      (Item : in Character) return Boolean;
   function Is_Special           (Item : in Character) return Boolean;

   --   Conversion functions for Character and String

   function To_Lower (Item : in Character) return Character;
   function To_Upper (Item : in Character) return Character;
   function To_Basic (Item : in Character) return Character;

   function To_Lower (Item : in String) return String;
   function To_Upper (Item : in String) return String;
   function To_Basic (Item : in String) return String;

   --   Classifications of and conversions between Character and ISO 646

   subtype ISO_646 is
     Character range Character'Val(0) .. Character'Val(127);

   function Is_ISO_646 (Item : in Character) return Boolean;
   function Is_ISO_646 (Item : in String)    return Boolean;

   function To_ISO_646 (Item       : in Character;
                        Substitute : in ISO_646 := ' ')
                       return ISO_646;

   function To_ISO_646 (Item       : in String;
                        Substitute : in ISO_646 := ' ')
                       return String;

   --   The functions Is_Character, Is_String, To_Character, To_String,
   --   To_Wide_Character  and To_Wide_String are obsolescent; see J.14.

   function Is_Character (Item : in Wide_Character) return Boolean
     renames Conversions.Is_Character;
   function Is_String    (Item : in Wide_String)    return Boolean
     renames Conversions.Is_String;

   function To_Character (Item       : in Wide_Character;
                          Substitute : in Character := ' ')
                         return Character
     renames Conversions.To_Character;

   function To_String    (Item       : in Wide_String;
                          Substitute : in Character := ' ')
                         return String
     renames Conversions.To_String;

   function To_Wide_Character (Item : in Character) return Wide_Character
     renames Conversions.To_Wide_Character;

   function To_Wide_String    (Item : in String)    return Wide_String
     renames Conversions.To_Wide_String;

end Ada.Characters.Handling;

参见

维基教科书

• Ada 编程/库/Ada

外部示例

• 在以下位置搜索 示例 Ada.Characters.Handling: Rosetta Code, GitHub (gists), 任何 Alire 包 或 本维基教科书.
• 在以下位置搜索 帖子 Ada.Characters.Handling: Stack Overflow, comp.lang.ada 或 任何与 Ada 相关的页面.

Ada 参考手册

Ada 95

• A.3.2: 包 Characters.Handling ^{[带注释的]}

Ada 2005

• A.3.2: 包 Characters.Handling ^{[带注释的]}

Ada 2012

• A.3.2: 包 Characters.Handling ^{[带注释的]}