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------------------------------------------------------------------------------ -- -- -- GNAT RUN-TIME COMPONENTS -- -- -- -- A D A . W I D E _ C H A R A C T E R S . U N I C O D E -- -- -- -- S p e c -- -- -- -- Copyright (C) 2005-2011, Free Software Foundation, Inc. -- -- -- -- GNAT is free software; you can redistribute it and/or modify it under -- -- terms of the GNU General Public License as published by the Free Soft- -- -- ware Foundation; either version 3, or (at your option) any later ver- -- -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- -- or FITNESS FOR A PARTICULAR PURPOSE. -- -- -- -- As a special exception under Section 7 of GPL version 3, you are granted -- -- additional permissions described in the GCC Runtime Library Exception, -- -- version 3.1, as published by the Free Software Foundation. -- -- -- -- You should have received a copy of the GNU General Public License and -- -- a copy of the GCC Runtime Library Exception along with this program; -- -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- -- <http://www.gnu.org/licenses/>. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ -- Unicode categorization routines for Wide_Character. Note that this -- package is strictly speaking Ada 2005 (since it is a child of an -- Ada 2005 unit), but we make it available in Ada 95 mode, since it -- only deals with wide characters. with System.UTF_32; package Ada.Wide_Characters.Unicode is pragma Pure; -- The following type defines the categories from the unicode definitions. -- The one addition we make is Fe, which represents the characters FFFE -- and FFFF in any of the planes. type Category is new System.UTF_32.Category; -- Cc Other, Control -- Cf Other, Format -- Cn Other, Not Assigned -- Co Other, Private Use -- Cs Other, Surrogate -- Ll Letter, Lowercase -- Lm Letter, Modifier -- Lo Letter, Other -- Lt Letter, Titlecase -- Lu Letter, Uppercase -- Mc Mark, Spacing Combining -- Me Mark, Enclosing -- Mn Mark, Nonspacing -- Nd Number, Decimal Digit -- Nl Number, Letter -- No Number, Other -- Pc Punctuation, Connector -- Pd Punctuation, Dash -- Pe Punctuation, Close -- Pf Punctuation, Final quote -- Pi Punctuation, Initial quote -- Po Punctuation, Other -- Ps Punctuation, Open -- Sc Symbol, Currency -- Sk Symbol, Modifier -- Sm Symbol, Math -- So Symbol, Other -- Zl Separator, Line -- Zp Separator, Paragraph -- Zs Separator, Space -- Fe relative position FFFE/FFFF in plane function Get_Category (U : Wide_Character) return Category; pragma Inline (Get_Category); -- Given a Wide_Character, returns corresponding Category, or Cn if the -- code does not have an assigned unicode category. -- The following functions perform category tests corresponding to lexical -- classes defined in the Ada standard. There are two interfaces for each -- function. The second takes a Category (e.g. returned by Get_Category). -- The first takes a Wide_Character. The form taking the Wide_Character is -- typically more efficient than calling Get_Category, but if several -- different tests are to be performed on the same code, it is more -- efficient to use Get_Category to get the category, then test the -- resulting category. function Is_Letter (U : Wide_Character) return Boolean; function Is_Letter (C : Category) return Boolean; pragma Inline (Is_Letter); -- Returns true iff U is a letter that can be used to start an identifier, -- or if C is one of the corresponding categories, which are the following: -- Letter, Uppercase (Lu) -- Letter, Lowercase (Ll) -- Letter, Titlecase (Lt) -- Letter, Modifier (Lm) -- Letter, Other (Lo) -- Number, Letter (Nl) function Is_Digit (U : Wide_Character) return Boolean; function Is_Digit (C : Category) return Boolean; pragma Inline (Is_Digit); -- Returns true iff U is a digit that can be used to extend an identifer, -- or if C is one of the corresponding categories, which are the following: -- Number, Decimal_Digit (Nd) function Is_Line_Terminator (U : Wide_Character) return Boolean; pragma Inline (Is_Line_Terminator); -- Returns true iff U is an allowed line terminator for source programs, -- if U is in the category Zp (Separator, Paragaph), or Zs (Separator, -- Line), or if U is a conventional line terminator (CR, LF, VT, FF). -- There is no category version for this function, since the set of -- characters does not correspond to a set of Unicode categories. function Is_Mark (U : Wide_Character) return Boolean; function Is_Mark (C : Category) return Boolean; pragma Inline (Is_Mark); -- Returns true iff U is a mark character which can be used to extend an -- identifier, or if C is one of the corresponding categories, which are -- the following: -- Mark, Non-Spacing (Mn) -- Mark, Spacing Combining (Mc) function Is_Other (U : Wide_Character) return Boolean; function Is_Other (C : Category) return Boolean; pragma Inline (Is_Other); -- Returns true iff U is an other format character, which means that it -- can be used to extend an identifier, but is ignored for the purposes of -- matching of identiers, or if C is one of the corresponding categories, -- which are the following: -- Other, Format (Cf) function Is_Punctuation (U : Wide_Character) return Boolean; function Is_Punctuation (C : Category) return Boolean; pragma Inline (Is_Punctuation); -- Returns true iff U is a punctuation character that can be used to -- separate pices of an identifier, or if C is one of the corresponding -- categories, which are the following: -- Punctuation, Connector (Pc) function Is_Space (U : Wide_Character) return Boolean; function Is_Space (C : Category) return Boolean; pragma Inline (Is_Space); -- Returns true iff U is considered a space to be ignored, or if C is one -- of the corresponding categories, which are the following: -- Separator, Space (Zs) function Is_Non_Graphic (U : Wide_Character) return Boolean; function Is_Non_Graphic (C : Category) return Boolean; pragma Inline (Is_Non_Graphic); -- Returns true iff U is considered to be a non-graphic character, or if C -- is one of the corresponding categories, which are the following: -- Other, Control (Cc) -- Other, Private Use (Co) -- Other, Surrogate (Cs) -- Separator, Line (Zl) -- Separator, Paragraph (Zp) -- FFFE or FFFF positions in any plane (Fe) -- -- Note that the Ada category format effector is subsumed by the above -- list of Unicode categories. -- -- Note that Other, Unassiged (Cn) is quite deliberately not included -- in the list of categories above. This means that should any of these -- code positions be defined in future with graphic characters they will -- be allowed without a need to change implementations or the standard. -- -- Note that Other, Format (Cf) is also quite deliberately not included -- in the list of categories above. This means that these characters can -- be included in character and string literals. -- The following function is used to fold to upper case, as required by -- the Ada 2005 standard rules for identifier case folding. Two -- identifiers are equivalent if they are identical after folding all -- letters to upper case using this routine. A corresponding function to -- fold to lower case is also provided. function To_Lower_Case (U : Wide_Character) return Wide_Character; pragma Inline (To_Lower_Case); -- If U represents an upper case letter, returns the corresponding lower -- case letter, otherwise U is returned unchanged. The folding is locale -- independent as defined by documents referenced in the note in section -- 1 of ISO/IEC 10646:2003 function To_Upper_Case (U : Wide_Character) return Wide_Character; pragma Inline (To_Upper_Case); -- If U represents a lower case letter, returns the corresponding upper -- case letter, otherwise U is returned unchanged. The folding is locale -- independent as defined by documents referenced in the note in section -- 1 of ISO/IEC 10646:2003 end Ada.Wide_Characters.Unicode;
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