#ifndef _WX_UNICHAR_H_
#define _WX_UNICHAR_H_
+#include "wx/defs.h"
#include "wx/chartype.h"
+#include "wx/stringimpl.h"
-class WXDLLIMPEXP_BASE wxUniCharRef;
+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.
// 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 unsigned int unicode_type;
+ 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); }
- // Create the character from a wchar_t character value.
- wxUniChar(wchar_t c) { m_value = c; }
-
-#ifndef wxWINT_T_IS_TYPEDEF
- // Create the character from a wint_t character value.
- wxUniChar(wint_t c) { m_value = c; }
-#endif
-
- wxUniChar(int c) { m_value = 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
- unicode_type GetValue() const { return m_value; }
+ 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; }
+ };
- // Casts to char and wchar_t types:
+ // 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 wchar_t() const { return m_value; }
-#ifndef wxWINT_T_IS_TYPEDEF
- operator wint_t() const { return m_value; }
-#endif
- operator int() const { return 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,
// operator unspecified_bool_type() would only makes the ambiguity worse.)
operator bool() const { return m_value != 0; }
bool operator!() const { return !((bool)*this); }
-#if (defined(__VISUALC__) && __VISUALC__ < 1400) || \
- defined(__DIGITALMARS__) || defined(__BORLANDC__)
- // We need this for VC++ < 8 or DigitalMars and expressions like
- // "str[0] && *p":
+
+ // 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; }
-#endif
// Assignment operators:
- wxUniChar& operator=(const wxUniChar& c) { m_value = c.m_value; return *this; }
+ 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=(wchar_t c) { m_value = c; return *this; }
-#ifndef wxWINT_T_IS_TYPEDEF
- wxUniChar& operator=(wint_t c) { m_value = c; return *this; }
-#endif
-
- // Comparision operators:
- bool operator==(const wxUniChar& c) const { return m_value == c.m_value; }
- bool operator==(char c) const { return m_value == From8bit(c); }
- bool operator==(wchar_t c) const { return m_value == (unicode_type)c; }
-#ifndef wxWINT_T_IS_TYPEDEF
- bool operator==(wint_t c) const { return m_value == (unicode_type)c; }
-#endif
+ wxUniChar& operator=(unsigned char c) { m_value = From8bit((char)c); return *this; }
- bool operator!=(const wxUniChar& c) const { return m_value != c.m_value; }
- bool operator!=(char c) const { return m_value != From8bit(c); }
- bool operator!=(wchar_t c) const { return m_value != (unicode_type)c; }
-#ifndef wxWINT_T_IS_TYPEDEF
- bool operator!=(wint_t c) const { return m_value != (unicode_type)c; }
-#endif
+#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
- bool operator>(const wxUniChar& c) const { return m_value > c.m_value; }
- bool operator>(char c) const { return m_value > (unicode_type)c; }
- bool operator>(wchar_t c) const { return m_value > (unicode_type)c; }
-#ifndef wxWINT_T_IS_TYPEDEF
- bool operator>(wint_t c) const { return m_value > (unicode_type)c; }
-#endif
+ // Comparison operators:
+#define wxDEFINE_UNICHAR_CMP_WITH_INT(T, op) \
+ bool operator op(T c) const { return m_value op (value_type)c; }
- bool operator<(const wxUniChar& c) const { return m_value < c.m_value; }
- bool operator<(char c) const { return m_value < From8bit(c); }
- bool operator<(wchar_t c) const { return m_value < (unicode_type)c; }
-#ifndef wxWINT_T_IS_TYPEDEF
- bool operator<(wint_t c) const { return m_value < (unicode_type)c; }
-#endif
+ // 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)
- bool operator>=(const wxUniChar& c) const { return m_value >= c.m_value; }
- bool operator>=(char c) const { return m_value >= From8bit(c); }
- bool operator>=(wchar_t c) const { return m_value >= (unicode_type)c; }
-#ifndef wxWINT_T_IS_TYPEDEF
- bool operator>=(wint_t c) const { return m_value >= (unicode_type)c; }
-#endif
+ wxFOR_ALL_COMPARISONS(wxDEFINE_UNICHAR_OPERATOR)
- bool operator<=(const wxUniChar& c) const { return m_value <= c.m_value; }
- bool operator<=(char c) const { return m_value <= From8bit(c); }
- bool operator<=(wchar_t c) const { return m_value <= (unicode_type)c; }
-#ifndef wxWINT_T_IS_TYPEDEF
- bool operator<=(wint_t c) const { return m_value <= (unicode_type)c; }
-#endif
+#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-(wchar_t c) const { return m_value - (unicode_type)c; }
-#ifndef wxWINT_T_IS_TYPEDEF
- int operator-(wint_t c) const { return m_value - (unicode_type)c; }
-#endif
+ 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:
- static unicode_type From8bit(char c);
- static char To8bit(unicode_type c);
+ // 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:
- unicode_type m_value;
+ value_type m_value;
};
class WXDLLIMPEXP_BASE wxUniCharRef
{
private:
+ typedef wxStringImpl::iterator iterator;
+
// create the reference
- // FIXME-UTF8: the interface will need changes for UTF-8 build
- wxUniCharRef(wxChar *pos) : m_pos(pos) {}
+#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
// 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!):
- //
- // FIXME-UTF8: the interface will need changes for UTF-8 build
- static wxUniCharRef CreateForString(wxChar *pos)
+#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(); }
- wxUniChar::unicode_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:
- wxUniCharRef& operator=(const wxUniCharRef& c)
- {
- *m_pos = *c.m_pos;
- return *this;
- };
+#if wxUSE_UNICODE_UTF8
+ wxUniCharRef& operator=(const wxUniChar& c);
+#else
+ wxUniCharRef& operator=(const wxUniChar& c) { *m_pos = c; return *this; }
+#endif
- wxUniCharRef& operator=(const wxUniChar& c)
- {
- *m_pos = c;
- return *this;
- };
+ wxUniCharRef& operator=(const wxUniCharRef& c)
+ { if (&c != this) *this = c.UniChar(); return *this; }
- wxUniCharRef& operator=(char c) { return *this = wxUniChar(c); }
- wxUniCharRef& operator=(wchar_t c) { return *this = wxUniChar(c); }
+#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
- // Casts to wxUniChar type:
- operator char() const { return UniChar(); }
- operator wchar_t() const { return UniChar(); }
-#ifndef wxWINT_T_IS_TYPEDEF
- operator wint_t() const { return UniChar(); }
-#endif
- operator int() const { return UniChar(); }
+ // 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(); }
-#if (defined(__VISUALC__) && __VISUALC__ < 1400) || \
- defined(__DIGITALMARS__) || defined(__BORLANDC__)
bool operator&&(bool v) const { return UniChar() && v; }
-#endif
- // Comparision operators:
- bool operator==(const wxUniCharRef& c) const { return m_pos == c.m_pos; }
- bool operator==(const wxUniChar& c) const { return UniChar() == c; }
- bool operator==(char c) const { return UniChar() == c; }
- bool operator==(wchar_t c) const { return UniChar() == c; }
-#ifndef wxWINT_T_IS_TYPEDEF
- bool operator==(wint_t c) const { return UniChar() == c; }
-#endif
+#define wxDEFINE_UNICHARREF_CMP_WITH_INT(T, op) \
+ bool operator op(T c) const { return UniChar() op c; }
- bool operator!=(const wxUniCharRef& c) const { return m_pos != c.m_pos; }
- bool operator!=(const wxUniChar& c) const { return UniChar() != c; }
- bool operator!=(char c) const { return UniChar() != c; }
- bool operator!=(wchar_t c) const { return UniChar() != c; }
-#ifndef wxWINT_T_IS_TYPEDEF
- bool operator!=(wint_t c) const { return UniChar() != c; }
-#endif
+ // 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)
- bool operator>(const wxUniCharRef& c) const { return UniChar() > c.UniChar(); }
- bool operator>(const wxUniChar& c) const { return UniChar() > c; }
- bool operator>(char c) const { return UniChar() > c; }
- bool operator>(wchar_t c) const { return UniChar() > c; }
-#ifndef wxWINT_T_IS_TYPEDEF
- bool operator>(wint_t c) const { return UniChar() > c; }
-#endif
+ wxFOR_ALL_COMPARISONS(wxDEFINE_UNICHARREF_OPERATOR)
- bool operator<(const wxUniCharRef& c) const { return UniChar() < c.UniChar(); }
- bool operator<(const wxUniChar& c) const { return UniChar() < c; }
- bool operator<(char c) const { return UniChar() < c; }
- bool operator<(wchar_t c) const { return UniChar() < c; }
-#ifndef wxWINT_T_IS_TYPEDEF
- bool operator<(wint_t c) const { return UniChar() < c; }
-#endif
-
- bool operator>=(const wxUniCharRef& c) const { return UniChar() >= c.UniChar(); }
- bool operator>=(const wxUniChar& c) const { return UniChar() >= c; }
- bool operator>=(char c) const { return UniChar() >= c; }
- bool operator>=(wchar_t c) const { return UniChar() >= c; }
-#ifndef wxWINT_T_IS_TYPEDEF
- bool operator>=(wint_t c) const { return UniChar() >= c; }
-#endif
-
- bool operator<=(const wxUniCharRef& c) const { return UniChar() <= c.UniChar(); }
- bool operator<=(const wxUniChar& c) const { return UniChar() <= c; }
- bool operator<=(char c) const { return UniChar() <= c; }
- bool operator<=(wchar_t c) const { return UniChar() <= c; }
-#ifndef wxWINT_T_IS_TYPEDEF
- bool operator<=(wint_t c) const { return UniChar() <= c; }
-#endif
+#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; }
-#ifndef wxWINT_T_IS_TYPEDEF
- int operator-(wint_t c) const { return UniChar() - c; }
-#endif
private:
+#if wxUSE_UNICODE_UTF8
+ wxUniChar UniChar() const;
+#else
wxUniChar UniChar() const { return *m_pos; }
- friend class WXDLLIMPEXP_BASE wxUniChar;
+#endif
+
+ friend class WXDLLIMPEXP_FWD_BASE wxUniChar;
private:
- // pointer to the character in string
- wxChar *m_pos;
+ // 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;
}
-// Comparision operators for the case when wxUniChar(Ref) is the second operand:
-inline bool operator==(char c1, const wxUniChar& c2) { return c2 == c1; }
-inline bool operator==(wchar_t c1, const wxUniChar& c2) { return c2 == c1; }
-#ifndef wxWINT_T_IS_TYPEDEF
-inline bool operator==(wint_t c1, const wxUniChar& c2) { return c2 == c1; }
-#endif
-
-inline bool operator!=(char c1, const wxUniChar& c2) { return c2 != c1; }
-inline bool operator!=(wchar_t c1, const wxUniChar& c2) { return c2 != c1; }
-#ifndef wxWINT_T_IS_TYPEDEF
-inline bool operator!=(wint_t c1, const wxUniChar& c2) { return c2 != c1; }
-#endif
-
-inline bool operator>(char c1, const wxUniChar& c2) { return c2 < c1; }
-inline bool operator>(wchar_t c1, const wxUniChar& c2) { return c2 < c1; }
-#ifndef wxWINT_T_IS_TYPEDEF
-inline bool operator>(wint_t c1, const wxUniChar& c2) { return c2 < c1; }
-#endif
-
-inline bool operator<(char c1, const wxUniChar& c2) { return c2 > c1; }
-inline bool operator<(wchar_t c1, const wxUniChar& c2) { return c2 > c1; }
-#ifndef wxWINT_T_IS_TYPEDEF
-inline bool operator<(wint_t c1, const wxUniChar& c2) { return c2 > c1; }
-#endif
-
-inline bool operator>=(char c1, const wxUniChar& c2) { return c2 <= c1; }
-inline bool operator>=(wchar_t c1, const wxUniChar& c2) { return c2 <= c1; }
-#ifndef wxWINT_T_IS_TYPEDEF
-inline bool operator>=(wint_t c1, const wxUniChar& c2) { return c2 <= c1; }
-#endif
-
-inline bool operator<=(char c1, const wxUniChar& c2) { return c2 >= c1; }
-inline bool operator<=(wchar_t c1, const wxUniChar& c2) { return c2 >= c1; }
-#ifndef wxWINT_T_IS_TYPEDEF
-inline bool operator<=(wint_t c1, const wxUniChar& c2) { return c2 >= c1; }
-#endif
-
-
-inline bool operator==(char c1, const wxUniCharRef& c2) { return c2 == c1; }
-inline bool operator==(wchar_t c1, const wxUniCharRef& c2) { return c2 == c1; }
-#ifndef wxWINT_T_IS_TYPEDEF
-inline bool operator==(wint_t c1, const wxUniCharRef& c2) { return c2 == c1; }
-#endif
-inline bool operator==(const wxUniChar& c1, const wxUniCharRef& c2) { return c2 == c1; }
-
-inline bool operator!=(char c1, const wxUniCharRef& c2) { return c2 != c1; }
-inline bool operator!=(wchar_t c1, const wxUniCharRef& c2) { return c2 != c1; }
-#ifndef wxWINT_T_IS_TYPEDEF
-inline bool operator!=(wint_t c1, const wxUniCharRef& c2) { return c2 != c1; }
-#endif
-inline bool operator!=(const wxUniChar& c1, const wxUniCharRef& c2) { return c2 != c1; }
+inline wxUniChar& wxUniChar::operator=(const wxUniCharRef& c)
+{
+ m_value = c.UniChar().m_value;
+ return *this;
+}
-inline bool operator>(char c1, const wxUniCharRef& c2) { return c2 < c1; }
-inline bool operator>(wchar_t c1, const wxUniCharRef& c2) { return c2 < c1; }
-#ifndef wxWINT_T_IS_TYPEDEF
-inline bool operator>(wint_t c1, const wxUniCharRef& c2) { return c2 < c1; }
-#endif
-inline bool operator>(const wxUniChar& c1, const wxUniCharRef& c2) { return c2 < c1; }
+// Comparison operators for the case when wxUniChar(Ref) is the second operand
+// implemented in terms of member comparison functions
-inline bool operator<(char c1, const wxUniCharRef& c2) { return c2 > c1; }
-inline bool operator<(wchar_t c1, const wxUniCharRef& c2) { return c2 > c1; }
-#ifndef wxWINT_T_IS_TYPEDEF
-inline bool operator<(wint_t c1, const wxUniCharRef& c2) { return c2 > c1; }
-#endif
-inline bool operator<(const wxUniChar& c1, const wxUniCharRef& c2) { return c2 > c1; }
+wxDEFINE_COMPARISONS_BY_REV(char, const wxUniChar&)
+wxDEFINE_COMPARISONS_BY_REV(char, const wxUniCharRef&)
-inline bool operator>=(char c1, const wxUniCharRef& c2) { return c2 <= c1; }
-inline bool operator>=(wchar_t c1, const wxUniCharRef& c2) { return c2 <= c1; }
-#ifndef wxWINT_T_IS_TYPEDEF
-inline bool operator>=(wint_t c1, const wxUniCharRef& c2) { return c2 <= c1; }
-#endif
-inline bool operator>=(const wxUniChar& c1, const wxUniCharRef& c2) { return c2 <= c1; }
+wxDEFINE_COMPARISONS_BY_REV(wchar_t, const wxUniChar&)
+wxDEFINE_COMPARISONS_BY_REV(wchar_t, const wxUniCharRef&)
-inline bool operator<=(char c1, const wxUniCharRef& c2) { return c2 >= c1; }
-inline bool operator<=(wchar_t c1, const wxUniCharRef& c2) { return c2 >= c1; }
-#ifndef wxWINT_T_IS_TYPEDEF
-inline bool operator<=(wint_t c1, const wxUniCharRef& c2) { return c2 >= c1; }
-#endif
-inline bool operator<=(const wxUniChar& c1, const wxUniCharRef& c2) { return c2 >= c1; }
+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-(wchar_t c1, const wxUniCharRef& c2) { return -(c2 - c1); }
-#ifndef wxWINT_T_IS_TYPEDEF
-inline int operator-(wint_t c1, const wxUniCharRef& c2) { return -(c2 - c1); }
-#endif
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_ */
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