[wxWidgets.git] / include / wx / unichar.h

///////////////////////////////////////////////////////////////////////////////
// Name:        wx/unichar.h
// Purpose:     wxUniChar and wxUniCharRef classes
// Author:      Vaclav Slavik
// Created:     2007-03-19
// RCS-ID:      $Id$
// Copyright:   (c) 2007 REA Elektronik GmbH
// Licence:     wxWindows licence
///////////////////////////////////////////////////////////////////////////////

#ifndef _WX_UNICHAR_H_
#define _WX_UNICHAR_H_

#include "wx/defs.h"
#include "wx/chartype.h"
#include "wx/stringimpl.h"

class WXDLLIMPEXP_FWD_BASE wxUniCharRef;
class WXDLLIMPEXP_FWD_BASE wxString;

// This class represents single Unicode character. It can be converted to
// and from char or wchar_t and implements commonly used character operations.
class WXDLLIMPEXP_BASE wxUniChar
{
public:
    // NB: this is not wchar_t on purpose, it needs to represent the entire
    //     Unicode code points range and wchar_t may be too small for that
    //     (e.g. on Win32 where wchar_t* is encoded in UTF-16)
    typedef wxUint32 value_type;

    wxUniChar() : m_value(0) {}

    // Create the character from 8bit character value encoded in the current
    // locale's charset.
    wxUniChar(char c) { m_value = From8bit(c); }
    wxUniChar(unsigned char c) { m_value = From8bit((char)c); }

#define wxUNICHAR_DEFINE_CTOR(type) \
    wxUniChar(type c) { m_value = c; }
    wxDO_FOR_INT_TYPES(wxUNICHAR_DEFINE_CTOR)
#undef wxUNICHAR_DEFINE_CTOR

    wxUniChar(const wxUniCharRef& c);

    // Returns Unicode code point value of the character
    value_type GetValue() const { return m_value; }

#if wxUSE_UNICODE_UTF8
    // buffer for single UTF-8 character
    struct Utf8CharBuffer
    {
        char data[5];
        operator const char*() const { return data; }
    };

    // returns the character encoded as UTF-8
    // (NB: implemented in stringops.cpp)
    Utf8CharBuffer AsUTF8() const;
#endif // wxUSE_UNICODE_UTF8

    // Returns true if the character is an ASCII character:
    bool IsAscii() const { return m_value < 0x80; }

    // Returns true if the character is representable as a single byte in the
    // current locale encoding and return this byte in output argument c (which
    // must be non-NULL)
    bool GetAsChar(char *c) const
    {
#if wxUSE_UNICODE
        if ( !IsAscii() )
        {
#if !wxUSE_UTF8_LOCALE_ONLY
            if ( GetAsHi8bit(m_value, c) )
                return true;
#endif // !wxUSE_UTF8_LOCALE_ONLY

            return false;
        }
#endif // wxUSE_UNICODE

        *c = wx_truncate_cast(char, m_value);
        return true;
    }

    // Conversions to char and wchar_t types: all of those are needed to be
    // able to pass wxUniChars to verious standard narrow and wide character
    // functions
    operator char() const { return To8bit(m_value); }
    operator unsigned char() const { return (unsigned char)To8bit(m_value); }

#define wxUNICHAR_DEFINE_OPERATOR_PAREN(type) \
    operator type() const { return (type)m_value; }
    wxDO_FOR_INT_TYPES(wxUNICHAR_DEFINE_OPERATOR_PAREN)
#undef wxUNICHAR_DEFINE_OPERATOR_PAREN

    // We need this operator for the "*p" part of expressions like "for (
    // const_iterator p = begin() + nStart; *p; ++p )". In this case,
    // compilation would fail without it because the conversion to bool would
    // be ambiguous (there are all these int types conversions...). (And adding
    // operator unspecified_bool_type() would only makes the ambiguity worse.)
    operator bool() const { return m_value != 0; }
    bool operator!() const { return !((bool)*this); }

    // And this one is needed by some (not all, but not using ifdefs makes the
    // code easier) compilers to parse "str[0] && *p" successfully
    bool operator&&(bool v) const { return (bool)*this && v; }

    // Assignment operators:
    wxUniChar& operator=(const wxUniChar& c) { if (&c != this) m_value = c.m_value; return *this; }
    wxUniChar& operator=(const wxUniCharRef& c);
    wxUniChar& operator=(char c) { m_value = From8bit(c); return *this; }
    wxUniChar& operator=(unsigned char c) { m_value = From8bit((char)c); return *this; }

#define wxUNICHAR_DEFINE_OPERATOR_EQUAL(type) \
    wxUniChar& operator=(type c) { m_value = c; return *this; }
    wxDO_FOR_INT_TYPES(wxUNICHAR_DEFINE_OPERATOR_EQUAL)
#undef wxUNICHAR_DEFINE_OPERATOR_EQUAL

    // Comparison operators:
#define wxDEFINE_UNICHAR_CMP_WITH_INT(T, op) \
    bool operator op(T c) const { return m_value op (value_type)c; }

    // define the given comparison operator for all the types
#define wxDEFINE_UNICHAR_OPERATOR(op)                                         \
    bool operator op(const wxUniChar& c) const { return m_value op c.m_value; }\
    bool operator op(char c) const { return m_value op From8bit(c); }         \
    bool operator op(unsigned char c) const { return m_value op From8bit((char)c); } \
    wxDO_FOR_INT_TYPES_1(wxDEFINE_UNICHAR_CMP_WITH_INT, op)

    wxFOR_ALL_COMPARISONS(wxDEFINE_UNICHAR_OPERATOR)

#undef wxDEFINE_UNICHAR_OPERATOR
#undef wxDEFINE_UNCHAR_CMP_WITH_INT

    // this is needed for expressions like 'Z'-c
    int operator-(const wxUniChar& c) const { return m_value - c.m_value; }
    int operator-(char c) const { return m_value - From8bit(c); }
    int operator-(unsigned char c) const { return m_value - From8bit((char)c); }
    int operator-(wchar_t c) const { return m_value - (value_type)c; }


private:
    // notice that we implement these functions inline for 7-bit ASCII
    // characters purely for performance reasons
    static value_type From8bit(char c)
    {
#if wxUSE_UNICODE
        if ( (unsigned char)c < 0x80 )
            return c;

        return FromHi8bit(c);
#else
        return c;
#endif
    }

    static char To8bit(value_type c)
    {
#if wxUSE_UNICODE
        if ( c < 0x80 )
            return wx_truncate_cast(char, c);

        return ToHi8bit(c);
#else
        return c;
#endif
    }

    // helpers of the functions above called to deal with non-ASCII chars
    static value_type FromHi8bit(char c);
    static char ToHi8bit(value_type v);
    static bool GetAsHi8bit(value_type v, char *c);

private:
    value_type m_value;
};


// Writeable reference to a character in wxString.
//
// This class can be used in the same way wxChar is used, except that changing
// its value updates the underlying string object.
class WXDLLIMPEXP_BASE wxUniCharRef
{
private:
    typedef wxStringImpl::iterator iterator;

    // create the reference
#if wxUSE_UNICODE_UTF8
    wxUniCharRef(wxString& str, iterator pos) : m_str(str), m_pos(pos) {}
#else
    wxUniCharRef(iterator pos) : m_pos(pos) {}
#endif

public:
    // NB: we have to make this public, because we don't have wxString
    //     declaration available here and so can't declare wxString::iterator
    //     as friend; so at least don't use a ctor but a static function
    //     that must be used explicitly (this is more than using 'explicit'
    //     keyword on ctor!):
#if wxUSE_UNICODE_UTF8
    static wxUniCharRef CreateForString(wxString& str, iterator pos)
        { return wxUniCharRef(str, pos); }
#else
    static wxUniCharRef CreateForString(iterator pos)
        { return wxUniCharRef(pos); }
#endif

    wxUniChar::value_type GetValue() const { return UniChar().GetValue(); }

#if wxUSE_UNICODE_UTF8
    wxUniChar::Utf8CharBuffer AsUTF8() const { return UniChar().AsUTF8(); }
#endif // wxUSE_UNICODE_UTF8

    bool IsAscii() const { return UniChar().IsAscii(); }
    bool GetAsChar(char *c) const { return UniChar().GetAsChar(c); }

    // Assignment operators:
#if wxUSE_UNICODE_UTF8
    wxUniCharRef& operator=(const wxUniChar& c);
#else
    wxUniCharRef& operator=(const wxUniChar& c) { *m_pos = c; return *this; }
#endif

    wxUniCharRef& operator=(const wxUniCharRef& c)
        { if (&c != this) *this = c.UniChar(); return *this; }

#define wxUNICHAR_REF_DEFINE_OPERATOR_EQUAL(type) \
    wxUniCharRef& operator=(type c) { return *this = wxUniChar(c); }
    wxDO_FOR_CHAR_INT_TYPES(wxUNICHAR_REF_DEFINE_OPERATOR_EQUAL)
#undef wxUNICHAR_REF_DEFINE_OPERATOR_EQUAL

    // Conversions to the same types as wxUniChar is convertible too:
#define wxUNICHAR_REF_DEFINE_OPERATOR_PAREN(type) \
    operator type() const { return UniChar(); }
    wxDO_FOR_CHAR_INT_TYPES(wxUNICHAR_REF_DEFINE_OPERATOR_PAREN)
#undef wxUNICHAR_REF_DEFINE_OPERATOR_PAREN

    // see wxUniChar::operator bool etc. for explanation
    operator bool() const { return (bool)UniChar(); }
    bool operator!() const { return !UniChar(); }
    bool operator&&(bool v) const { return UniChar() && v; }

#define wxDEFINE_UNICHARREF_CMP_WITH_INT(T, op) \
    bool operator op(T c) const { return UniChar() op c; }

    // Comparison operators:
#define wxDEFINE_UNICHARREF_OPERATOR(op)                                      \
    bool operator op(const wxUniCharRef& c) const { return UniChar() op c.UniChar(); }\
    bool operator op(const wxUniChar& c) const { return UniChar() op c; }     \
    wxDO_FOR_CHAR_INT_TYPES_1(wxDEFINE_UNICHARREF_CMP_WITH_INT, op)

    wxFOR_ALL_COMPARISONS(wxDEFINE_UNICHARREF_OPERATOR)

#undef wxDEFINE_UNICHARREF_OPERATOR
#undef wxDEFINE_UNICHARREF_CMP_WITH_INT

    // for expressions like c-'A':
    int operator-(const wxUniCharRef& c) const { return UniChar() - c.UniChar(); }
    int operator-(const wxUniChar& c) const { return UniChar() - c; }
    int operator-(char c) const { return UniChar() - c; }
    int operator-(unsigned char c) const { return UniChar() - c; }
    int operator-(wchar_t c) const { return UniChar() - c; }

private:
#if wxUSE_UNICODE_UTF8
    wxUniChar UniChar() const;
#else
    wxUniChar UniChar() const { return *m_pos; }
#endif

    friend class WXDLLIMPEXP_FWD_BASE wxUniChar;

private:
    // reference to the string and pointer to the character in string
#if wxUSE_UNICODE_UTF8
    wxString& m_str;
#endif
    iterator m_pos;
};

inline wxUniChar::wxUniChar(const wxUniCharRef& c)
{
    m_value = c.UniChar().m_value;
}

inline wxUniChar& wxUniChar::operator=(const wxUniCharRef& c)
{
    m_value = c.UniChar().m_value;
    return *this;
}

// Comparison operators for the case when wxUniChar(Ref) is the second operand
// implemented in terms of member comparison functions

wxDEFINE_COMPARISONS_BY_REV(char, const wxUniChar&)
wxDEFINE_COMPARISONS_BY_REV(char, const wxUniCharRef&)

wxDEFINE_COMPARISONS_BY_REV(wchar_t, const wxUniChar&)
wxDEFINE_COMPARISONS_BY_REV(wchar_t, const wxUniCharRef&)

wxDEFINE_COMPARISONS_BY_REV(const wxUniChar&, const wxUniCharRef&)

// for expressions like c-'A':
inline int operator-(char c1, const wxUniCharRef& c2) { return -(c2 - c1); }
inline int operator-(const wxUniChar& c1, const wxUniCharRef& c2) { return -(c2 - c1); }
inline int operator-(wchar_t c1, const wxUniCharRef& c2) { return -(c2 - c1); }

#endif /* _WX_UNICHAR_H_ */
Commit	Line	Data
e3f6cbd9 VS	1	///////////////////////////////////////////////////////////////////////////////
	2	// Name: wx/unichar.h
	3	// Purpose: wxUniChar and wxUniCharRef classes
	4	// Author: Vaclav Slavik
	5	// Created: 2007-03-19
	6	// RCS-ID: $Id$
	7	// Copyright: (c) 2007 REA Elektronik GmbH
	8	// Licence: wxWindows licence
	9	///////////////////////////////////////////////////////////////////////////////
	10
	11	#ifndef _WX_UNICHAR_H_
	12	#define _WX_UNICHAR_H_
	13
dbecee02	14	#include "wx/defs.h"
e3f6cbd9	15	#include "wx/chartype.h"
a7ea63e2	16	#include "wx/stringimpl.h"
a962cdf4	17
b5dbe15d	18	class WXDLLIMPEXP_FWD_BASE wxUniCharRef;
22188d73	19	class WXDLLIMPEXP_FWD_BASE wxString;
e3f6cbd9 VS	20
	21	// This class represents single Unicode character. It can be converted to
	22	// and from char or wchar_t and implements commonly used character operations.
	23	class WXDLLIMPEXP_BASE wxUniChar
	24	{
	25	public:
	26	// NB: this is not wchar_t on purpose, it needs to represent the entire
	27	// Unicode code points range and wchar_t may be too small for that
	28	// (e.g. on Win32 where wchar_t* is encoded in UTF-16)
dbecee02	29	typedef wxUint32 value_type;
e3f6cbd9 VS	30
	31	wxUniChar() : m_value(0) {}
	32
	33	// Create the character from 8bit character value encoded in the current
	34	// locale's charset.
	35	wxUniChar(char c) { m_value = From8bit(c); }
9f1b1b78	36	wxUniChar(unsigned char c) { m_value = From8bit((char)c); }
e3f6cbd9	37
622bc15f VZ	38	#define wxUNICHAR_DEFINE_CTOR(type) \
	39	wxUniChar(type c) { m_value = c; }
	40	wxDO_FOR_INT_TYPES(wxUNICHAR_DEFINE_CTOR)
	41	#undef wxUNICHAR_DEFINE_CTOR
e3f6cbd9 VS	42
	43	wxUniChar(const wxUniCharRef& c);
	44
	45	// Returns Unicode code point value of the character
d1b7ed67	46	value_type GetValue() const { return m_value; }
e3f6cbd9	47
1fc10687 VS	48	#if wxUSE_UNICODE_UTF8
	49	// buffer for single UTF-8 character
	50	struct Utf8CharBuffer
	51	{
	52	char data[5];
	53	operator const char*() const { return data; }
	54	};
	55
	56	// returns the character encoded as UTF-8
	57	// (NB: implemented in stringops.cpp)
	58	Utf8CharBuffer AsUTF8() const;
	59	#endif // wxUSE_UNICODE_UTF8
	60
81727065 VS	61	// Returns true if the character is an ASCII character:
	62	bool IsAscii() const { return m_value < 0x80; }
	63
874dbd3a VZ	64	// Returns true if the character is representable as a single byte in the
	65	// current locale encoding and return this byte in output argument c (which
	66	// must be non-NULL)
	67	bool GetAsChar(char *c) const
	68	{
	69	#if wxUSE_UNICODE
	70	if ( !IsAscii() )
	71	{
	72	#if !wxUSE_UTF8_LOCALE_ONLY
	73	if ( GetAsHi8bit(m_value, c) )
	74	return true;
	75	#endif // !wxUSE_UTF8_LOCALE_ONLY
	76
	77	return false;
	78	}
	79	#endif // wxUSE_UNICODE
	80
	81	*c = wx_truncate_cast(char, m_value);
	82	return true;
	83	}
	84
2a686bd3 VZ	85	// Conversions to char and wchar_t types: all of those are needed to be
	86	// able to pass wxUniChars to verious standard narrow and wide character
	87	// functions
e3f6cbd9	88	operator char() const { return To8bit(m_value); }
21f0762a	89	operator unsigned char() const { return (unsigned char)To8bit(m_value); }
622bc15f VZ	90
	91	#define wxUNICHAR_DEFINE_OPERATOR_PAREN(type) \
	92	operator type() const { return (type)m_value; }
	93	wxDO_FOR_INT_TYPES(wxUNICHAR_DEFINE_OPERATOR_PAREN)
	94	#undef wxUNICHAR_DEFINE_OPERATOR_PAREN
e3f6cbd9 VS	95
	96	// We need this operator for the "*p" part of expressions like "for (
	97	// const_iterator p = begin() + nStart; *p; ++p )". In this case,
	98	// compilation would fail without it because the conversion to bool would
	99	// be ambiguous (there are all these int types conversions...). (And adding
	100	// operator unspecified_bool_type() would only makes the ambiguity worse.)
	101	operator bool() const { return m_value != 0; }
	102	bool operator!() const { return !((bool)*this); }
8019a673 VZ	103
	104	// And this one is needed by some (not all, but not using ifdefs makes the
	105	// code easier) compilers to parse "str[0] && *p" successfully
e3f6cbd9	106	bool operator&&(bool v) const { return (bool)*this && v; }
e3f6cbd9 VS	107
e3f6cbd9 VS	108	// Assignment operators:
162e998c	109	wxUniChar& operator=(const wxUniChar& c) { if (&c != this) m_value = c.m_value; return *this; }
c2d122aa	110	wxUniChar& operator=(const wxUniCharRef& c);
e3f6cbd9	111	wxUniChar& operator=(char c) { m_value = From8bit(c); return *this; }
db18be57	112	wxUniChar& operator=(unsigned char c) { m_value = From8bit((char)c); return *this; }
622bc15f VZ	113
	114	#define wxUNICHAR_DEFINE_OPERATOR_EQUAL(type) \
	115	wxUniChar& operator=(type c) { m_value = c; return *this; }
	116	wxDO_FOR_INT_TYPES(wxUNICHAR_DEFINE_OPERATOR_EQUAL)
	117	#undef wxUNICHAR_DEFINE_OPERATOR_EQUAL
e3f6cbd9	118
fb52c2b6	119	// Comparison operators:
622bc15f VZ	120	#define wxDEFINE_UNICHAR_CMP_WITH_INT(T, op) \
622bc15f VZ	121	bool operator op(T c) const { return m_value op (value_type)c; }
e3f6cbd9	122
fb52c2b6	123	// define the given comparison operator for all the types
98c4eb39	124	#define wxDEFINE_UNICHAR_OPERATOR(op) \
fb52c2b6 VZ	125	bool operator op(const wxUniChar& c) const { return m_value op c.m_value; }\
fb52c2b6 VZ	126	bool operator op(char c) const { return m_value op From8bit(c); } \
db18be57	127	bool operator op(unsigned char c) const { return m_value op From8bit((char)c); } \
622bc15f	128	wxDO_FOR_INT_TYPES_1(wxDEFINE_UNICHAR_CMP_WITH_INT, op)
e3f6cbd9	129
fb52c2b6	130	wxFOR_ALL_COMPARISONS(wxDEFINE_UNICHAR_OPERATOR)
e3f6cbd9	131
fb52c2b6	132	#undef wxDEFINE_UNICHAR_OPERATOR
622bc15f	133	#undef wxDEFINE_UNCHAR_CMP_WITH_INT
e3f6cbd9	134
fb52c2b6	135	// this is needed for expressions like 'Z'-c
e3f6cbd9 VS	136	int operator-(const wxUniChar& c) const { return m_value - c.m_value; }
e3f6cbd9 VS	137	int operator-(char c) const { return m_value - From8bit(c); }
db18be57	138	int operator-(unsigned char c) const { return m_value - From8bit((char)c); }
d1b7ed67	139	int operator-(wchar_t c) const { return m_value - (value_type)c; }
21f0762a	140
e3f6cbd9 VS	141
e3f6cbd9 VS	142	private:
ce65118e VZ	143	// notice that we implement these functions inline for 7-bit ASCII
	144	// characters purely for performance reasons
	145	static value_type From8bit(char c)
	146	{
a4535b9f	147	#if wxUSE_UNICODE
ce65118e VZ	148	if ( (unsigned char)c < 0x80 )
	149	return c;
	150
	151	return FromHi8bit(c);
a4535b9f VS	152	#else
	153	return c;
	154	#endif
ce65118e VZ	155	}
	156
	157	static char To8bit(value_type c)
	158	{
a4535b9f	159	#if wxUSE_UNICODE
ce65118e	160	if ( c < 0x80 )
5c69ef61	161	return wx_truncate_cast(char, c);
ce65118e VZ	162
ce65118e VZ	163	return ToHi8bit(c);
a4535b9f VS	164	#else
	165	return c;
	166	#endif
ce65118e VZ	167	}
	168
	169	// helpers of the functions above called to deal with non-ASCII chars
	170	static value_type FromHi8bit(char c);
874dbd3a VZ	171	static char ToHi8bit(value_type v);
874dbd3a VZ	172	static bool GetAsHi8bit(value_type v, char *c);
e3f6cbd9 VS	173
e3f6cbd9 VS	174	private:
d1b7ed67	175	value_type m_value;
e3f6cbd9 VS	176	};
	177
	178
	179	// Writeable reference to a character in wxString.
	180	//
	181	// This class can be used in the same way wxChar is used, except that changing
	182	// its value updates the underlying string object.
	183	class WXDLLIMPEXP_BASE wxUniCharRef
	184	{
	185	private:
a962cdf4 VS	186	typedef wxStringImpl::iterator iterator;
a962cdf4 VS	187
e3f6cbd9	188	// create the reference
81727065	189	#if wxUSE_UNICODE_UTF8
6bd4f281	190	wxUniCharRef(wxString& str, iterator pos) : m_str(str), m_pos(pos) {}
81727065	191	#else
a962cdf4	192	wxUniCharRef(iterator pos) : m_pos(pos) {}
81727065	193	#endif
e3f6cbd9 VS	194
	195	public:
	196	// NB: we have to make this public, because we don't have wxString
	197	// declaration available here and so can't declare wxString::iterator
	198	// as friend; so at least don't use a ctor but a static function
	199	// that must be used explicitly (this is more than using 'explicit'
	200	// keyword on ctor!):
81727065	201	#if wxUSE_UNICODE_UTF8
6bd4f281 VS	202	static wxUniCharRef CreateForString(wxString& str, iterator pos)
6bd4f281 VS	203	{ return wxUniCharRef(str, pos); }
81727065	204	#else
a962cdf4	205	static wxUniCharRef CreateForString(iterator pos)
e3f6cbd9	206	{ return wxUniCharRef(pos); }
81727065	207	#endif
e3f6cbd9	208
d1b7ed67	209	wxUniChar::value_type GetValue() const { return UniChar().GetValue(); }
1fc10687 VS	210
	211	#if wxUSE_UNICODE_UTF8
	212	wxUniChar::Utf8CharBuffer AsUTF8() const { return UniChar().AsUTF8(); }
	213	#endif // wxUSE_UNICODE_UTF8
	214
bc5443ba	215	bool IsAscii() const { return UniChar().IsAscii(); }
874dbd3a	216	bool GetAsChar(char *c) const { return UniChar().GetAsChar(c); }
e3f6cbd9 VS	217
e3f6cbd9 VS	218	// Assignment operators:
81727065 VS	219	#if wxUSE_UNICODE_UTF8
	220	wxUniCharRef& operator=(const wxUniChar& c);
	221	#else
	222	wxUniCharRef& operator=(const wxUniChar& c) { m_pos = c; return this; }
	223	#endif
e3f6cbd9	224
81727065	225	wxUniCharRef& operator=(const wxUniCharRef& c)
162e998c	226	{ if (&c != this) this = c.UniChar(); return this; }
e3f6cbd9	227
622bc15f VZ	228	#define wxUNICHAR_REF_DEFINE_OPERATOR_EQUAL(type) \
	229	wxUniCharRef& operator=(type c) { return *this = wxUniChar(c); }
	230	wxDO_FOR_CHAR_INT_TYPES(wxUNICHAR_REF_DEFINE_OPERATOR_EQUAL)
	231	#undef wxUNICHAR_REF_DEFINE_OPERATOR_EQUAL
e3f6cbd9	232
2a686bd3	233	// Conversions to the same types as wxUniChar is convertible too:
622bc15f VZ	234	#define wxUNICHAR_REF_DEFINE_OPERATOR_PAREN(type) \
	235	operator type() const { return UniChar(); }
	236	wxDO_FOR_CHAR_INT_TYPES(wxUNICHAR_REF_DEFINE_OPERATOR_PAREN)
	237	#undef wxUNICHAR_REF_DEFINE_OPERATOR_PAREN
e3f6cbd9 VS	238
	239	// see wxUniChar::operator bool etc. for explanation
	240	operator bool() const { return (bool)UniChar(); }
	241	bool operator!() const { return !UniChar(); }
e3f6cbd9	242	bool operator&&(bool v) const { return UniChar() && v; }
e3f6cbd9	243
622bc15f VZ	244	#define wxDEFINE_UNICHARREF_CMP_WITH_INT(T, op) \
	245	bool operator op(T c) const { return UniChar() op c; }
	246
fb52c2b6	247	// Comparison operators:
98c4eb39	248	#define wxDEFINE_UNICHARREF_OPERATOR(op) \
fb52c2b6 VZ	249	bool operator op(const wxUniCharRef& c) const { return UniChar() op c.UniChar(); }\
fb52c2b6 VZ	250	bool operator op(const wxUniChar& c) const { return UniChar() op c; } \
622bc15f	251	wxDO_FOR_CHAR_INT_TYPES_1(wxDEFINE_UNICHARREF_CMP_WITH_INT, op)
e3f6cbd9	252
fb52c2b6	253	wxFOR_ALL_COMPARISONS(wxDEFINE_UNICHARREF_OPERATOR)
e3f6cbd9	254
fb52c2b6	255	#undef wxDEFINE_UNICHARREF_OPERATOR
622bc15f	256	#undef wxDEFINE_UNICHARREF_CMP_WITH_INT
e3f6cbd9 VS	257
	258	// for expressions like c-'A':
	259	int operator-(const wxUniCharRef& c) const { return UniChar() - c.UniChar(); }
	260	int operator-(const wxUniChar& c) const { return UniChar() - c; }
	261	int operator-(char c) const { return UniChar() - c; }
db18be57	262	int operator-(unsigned char c) const { return UniChar() - c; }
e3f6cbd9	263	int operator-(wchar_t c) const { return UniChar() - c; }
e3f6cbd9 VS	264
e3f6cbd9 VS	265	private:
81727065	266	#if wxUSE_UNICODE_UTF8
467175ab	267	wxUniChar UniChar() const;
81727065	268	#else
467175ab	269	wxUniChar UniChar() const { return *m_pos; }
81727065 VS	270	#endif
81727065 VS	271
b5dbe15d	272	friend class WXDLLIMPEXP_FWD_BASE wxUniChar;
e3f6cbd9 VS	273
e3f6cbd9 VS	274	private:
81727065 VS	275	// reference to the string and pointer to the character in string
81727065 VS	276	#if wxUSE_UNICODE_UTF8
6bd4f281	277	wxString& m_str;
81727065	278	#endif
a962cdf4	279	iterator m_pos;
e3f6cbd9 VS	280	};
	281
	282	inline wxUniChar::wxUniChar(const wxUniCharRef& c)
	283	{
	284	m_value = c.UniChar().m_value;
	285	}
	286
c2d122aa VS	287	inline wxUniChar& wxUniChar::operator=(const wxUniCharRef& c)
	288	{
	289	m_value = c.UniChar().m_value;
	290	return *this;
	291	}
	292
fb52c2b6 VZ	293	// Comparison operators for the case when wxUniChar(Ref) is the second operand
fb52c2b6 VZ	294	// implemented in terms of member comparison functions
e3f6cbd9	295
6d93e28a VZ	296	wxDEFINE_COMPARISONS_BY_REV(char, const wxUniChar&)
6d93e28a VZ	297	wxDEFINE_COMPARISONS_BY_REV(char, const wxUniCharRef&)
e3f6cbd9	298
6d93e28a VZ	299	wxDEFINE_COMPARISONS_BY_REV(wchar_t, const wxUniChar&)
6d93e28a VZ	300	wxDEFINE_COMPARISONS_BY_REV(wchar_t, const wxUniCharRef&)
e3f6cbd9	301
6d93e28a	302	wxDEFINE_COMPARISONS_BY_REV(const wxUniChar&, const wxUniCharRef&)
e3f6cbd9 VS	303
	304	// for expressions like c-'A':
	305	inline int operator-(char c1, const wxUniCharRef& c2) { return -(c2 - c1); }
e3f6cbd9	306	inline int operator-(const wxUniChar& c1, const wxUniCharRef& c2) { return -(c2 - c1); }
436bb9f5	307	inline int operator-(wchar_t c1, const wxUniCharRef& c2) { return -(c2 - c1); }
e3f6cbd9 VS	308
e3f6cbd9 VS	309	#endif /* _WX_UNICHAR_H_ */