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// © 2018 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
// This file contains utilities to deal with static-allocated UnicodeSets.
//
// Common use case: you write a "private static final" UnicodeSet in Java, and
// want something similarly easy in C++. Originally written for number
// parsing, but this header can be used for other applications.
//
// Main entrypoint: `unisets::get(unisets::MY_SET_ID_HERE)`
//
// This file is in common instead of i18n because it is needed by ucurr.cpp.
//
// Author: sffc
#include "unicode/utypes.h"
#if !UCONFIG_NO_FORMATTING
#ifndef __STATIC_UNICODE_SETS_H__
#define __STATIC_UNICODE_SETS_H__
#include "unicode/uniset.h"
#include "unicode/unistr.h"
U_NAMESPACE_BEGIN
namespace unisets {
enum Key {
// NONE is used to indicate null in chooseFrom().
// EMPTY is used to get an empty UnicodeSet.
NONE = -1,
EMPTY = 0,
// Ignorables
DEFAULT_IGNORABLES,
STRICT_IGNORABLES,
// Separators
// Notes:
// - COMMA is a superset of STRICT_COMMA
// - PERIOD is a superset of SCRICT_PERIOD
// - ALL_SEPARATORS is the union of COMMA, PERIOD, and OTHER_GROUPING_SEPARATORS
// - STRICT_ALL_SEPARATORS is the union of STRICT_COMMA, STRICT_PERIOD, and OTHER_GRP_SEPARATORS
COMMA,
PERIOD,
STRICT_COMMA,
STRICT_PERIOD,
APOSTROPHE_SIGN,
OTHER_GROUPING_SEPARATORS,
ALL_SEPARATORS,
STRICT_ALL_SEPARATORS,
// Symbols
MINUS_SIGN,
PLUS_SIGN,
PERCENT_SIGN,
PERMILLE_SIGN,
INFINITY_SIGN,
// Currency Symbols
DOLLAR_SIGN,
POUND_SIGN,
RUPEE_SIGN,
YEN_SIGN,
WON_SIGN,
// Other
DIGITS,
// Combined Separators with Digits (for lead code points)
DIGITS_OR_ALL_SEPARATORS,
DIGITS_OR_STRICT_ALL_SEPARATORS,
// The number of elements in the enum.
UNISETS_KEY_COUNT
};
/**
* Gets the static-allocated UnicodeSet according to the provided key. The
* pointer will be deleted during u_cleanup(); the caller should NOT delete it.
*
* Exported as U_COMMON_API for ucurr.cpp
*
* This method is always safe and OK to chain: in the case of a memory or other
* error, it returns an empty set from static memory.
*
* Example:
*
* UBool hasIgnorables = unisets::get(unisets::DEFAULT_IGNORABLES)->contains(...);
*
* @param key The desired UnicodeSet according to the enum in this file.
* @return The requested UnicodeSet. Guaranteed to be frozen and non-null, but
* may be empty if an error occurred during data loading.
*/
U_COMMON_API const UnicodeSet* get(Key key);
/**
* Checks if the UnicodeSet given by key1 contains the given string.
*
* Exported as U_COMMON_API for numparse_decimal.cpp
*
* @param str The string to check.
* @param key1 The set to check.
* @return key1 if the set contains str, or NONE if not.
*/
U_COMMON_API Key chooseFrom(UnicodeString str, Key key1);
/**
* Checks if the UnicodeSet given by either key1 or key2 contains the string.
*
* Exported as U_COMMON_API for numparse_decimal.cpp
*
* @param str The string to check.
* @param key1 The first set to check.
* @param key2 The second set to check.
* @return key1 if that set contains str; key2 if that set contains str; or
* NONE if neither set contains str.
*/
U_COMMON_API Key chooseFrom(UnicodeString str, Key key1, Key key2);
// TODO: Load these from data: ICU-20108
// Unused in C++:
// Key chooseCurrency(UnicodeString str);
// Used instead:
static const struct {
Key key;
UChar32 exemplar;
} kCurrencyEntries[] = {
{DOLLAR_SIGN, u'$'},
{POUND_SIGN, u'£'},
{RUPEE_SIGN, u'₹'},
{YEN_SIGN, u'¥'},
{WON_SIGN, u'₩'},
};
} // namespace unisets
U_NAMESPACE_END
#endif //__STATIC_UNICODE_SETS_H__
#endif /* #if !UCONFIG_NO_FORMATTING */
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