godot/thirdparty/icu4c/common/unicode/symtable.h

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
**********************************************************************
*   Copyright (c) 2000-2005, International Business Machines
*   Corporation and others.  All Rights Reserved.
**********************************************************************
*   Date        Name        Description
*   02/04/00    aliu        Creation.
**********************************************************************
*/
#ifndef SYMTABLE_H
#define SYMTABLE_H

#include "unicode/utypes.h"

#if U_SHOW_CPLUSPLUS_API

#include "unicode/uobject.h"

/**
 * \file 
 * \brief C++ API: An interface that defines both lookup protocol and parsing of
 * symbolic names.
 */
 
U_NAMESPACE_BEGIN

class ParsePosition;
class UnicodeFunctor;
class UnicodeSet;
class UnicodeString;

/**
 * An interface that defines both lookup protocol and parsing of
 * symbolic names.
 *
 * <p>A symbol table maintains two kinds of mappings.  The first is
 * between symbolic names and their values.  For example, if the
 * variable with the name "start" is set to the value "alpha"
 * (perhaps, though not necessarily, through an expression such as
 * "$start=alpha"), then the call lookup("start") will return the
 * char[] array ['a', 'l', 'p', 'h', 'a'].
 *
 * <p>The second kind of mapping is between character values and
 * UnicodeMatcher objects.  This is used by RuleBasedTransliterator,
 * which uses characters in the private use area to represent objects
 * such as UnicodeSets.  If U+E015 is mapped to the UnicodeSet [a-z],
 * then lookupMatcher(0xE015) will return the UnicodeSet [a-z].
 *
 * <p>Finally, a symbol table defines parsing behavior for symbolic
 * names.  All symbolic names start with the SYMBOL_REF character.
 * When a parser encounters this character, it calls parseReference()
 * with the position immediately following the SYMBOL_REF.  The symbol
 * table parses the name, if there is one, and returns it.
 *
 * @stable ICU 2.8
 */
class U_COMMON_API SymbolTable /* not : public UObject because this is an interface/mixin class */ { … };
U_NAMESPACE_END

#endif /* U_SHOW_CPLUSPLUS_API */

#endif