include/wx/stringimpl.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/stringimpl.h
   3 // Purpose:     wxStringImpl class, implementation of wxString
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     29/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 /*
  13     This header implements std::string-like string class, wxStringImpl, that is
  14     used by wxString to store the data. Alternatively, if wxUSE_STL=1,
  15     wxStringImpl is just a typedef to std:: string class.
  16 */
  17
  18 #ifndef _WX_WXSTRINGIMPL_H__
  19 #define _WX_WXSTRINGIMPL_H__
  20
  21 // ----------------------------------------------------------------------------
  22 // headers
  23 // ----------------------------------------------------------------------------
  24
  25 #include "wx/defs.h"        // everybody should include this
  26 #include "wx/chartype.h"    // for wxChar
  27 #include "wx/wxcrtbase.h"   // for wxStrlen() etc.
  28
  29 #include <stdlib.h>
  30
  31 // ---------------------------------------------------------------------------
  32 // macros
  33 // ---------------------------------------------------------------------------
  34
  35 // implementation only
  36 #define   wxASSERT_VALID_INDEX(i) \
  37     wxASSERT_MSG( (size_t)(i) <= length(), _T("invalid index in wxString") )
  38
  39
  40 // ----------------------------------------------------------------------------
  41 // global data
  42 // ----------------------------------------------------------------------------
  43
  44 // global pointer to empty string
  45 extern WXDLLIMPEXP_DATA_BASE(const wxChar*) wxEmptyString;
  46 #if wxUSE_UNICODE_UTF8
  47 // FIXME-UTF8: we should have only one wxEmptyString
  48 extern WXDLLIMPEXP_DATA_BASE(const wxStringCharType*) wxEmptyStringImpl;
  49 #endif
  50
  51
  52 // ----------------------------------------------------------------------------
  53 // deal with STL/non-STL/non-STL-but-wxUSE_STD_STRING
  54 // ----------------------------------------------------------------------------
  55
  56 // using STL implies using std::string
  57 #if wxUSE_STL
  58     #undef wxUSE_STD_STRING
  59     #define wxUSE_STD_STRING 1
  60 #endif
  61
  62 // we use STL-based string internally if we use std::string at all now, there
  63 // should be no reason to prefer our internal implement but if you really need
  64 // it you can predefine wxUSE_STL_BASED_WXSTRING as 0 when building the library
  65 #ifndef wxUSE_STL_BASED_WXSTRING
  66     #define wxUSE_STL_BASED_WXSTRING  wxUSE_STD_STRING
  67 #endif
  68
  69 // in both cases we need to define wxStdString
  70 #if wxUSE_STL_BASED_WXSTRING || wxUSE_STD_STRING
  71
  72 #include "wx/beforestd.h"
  73 #include <string>
  74 #include "wx/afterstd.h"
  75
  76 #ifdef HAVE_STD_WSTRING
  77     typedef std::wstring wxStdWideString;
  78 #else
  79     typedef std::basic_string<wchar_t> wxStdWideString;
  80 #endif
  81
  82 #if wxUSE_UNICODE_WCHAR
  83     typedef wxStdWideString wxStdString;
  84 #else
  85     typedef std::string wxStdString;
  86 #endif
  87
  88 #endif // wxUSE_STL_BASED_WXSTRING || wxUSE_STD_STRING
  89
  90
  91 #if wxUSE_STL_BASED_WXSTRING
  92
  93     // we always want ctor from std::string when using std::string internally
  94     #undef wxUSE_STD_STRING
  95     #define wxUSE_STD_STRING 1
  96
  97     #if (defined(__GNUG__) && (__GNUG__ < 3)) || \
  98         (defined(_MSC_VER) && (_MSC_VER <= 1200))
  99         #define wxSTRING_BASE_HASNT_CLEAR
 100     #endif
 101
 102     typedef wxStdString wxStringImpl;
 103 #else // if !wxUSE_STL_BASED_WXSTRING
 104
 105 // in non-STL mode, compare() is implemented in wxString and not wxStringImpl
 106 #undef HAVE_STD_STRING_COMPARE
 107
 108 // ---------------------------------------------------------------------------
 109 // string data prepended with some housekeeping info (used by wxString class),
 110 // is never used directly (but had to be put here to allow inlining)
 111 // ---------------------------------------------------------------------------
 112
 113 struct WXDLLIMPEXP_BASE wxStringData
 114 {
 115   int     nRefs;        // reference count
 116   size_t  nDataLength,  // actual string length
 117           nAllocLength; // allocated memory size
 118
 119   // mimics declaration 'wxStringCharType data[nAllocLength]'
 120   wxStringCharType* data() const { return (wxStringCharType*)(this + 1); }
 121
 122   // empty string has a special ref count so it's never deleted
 123   bool  IsEmpty()   const { return (nRefs == -1); }
 124   bool  IsShared()  const { return (nRefs > 1);   }
 125
 126   // lock/unlock
 127   void  Lock()   { if ( !IsEmpty() ) nRefs++;                    }
 128
 129   // VC++ will refuse to inline Unlock but profiling shows that it is wrong
 130 #if defined(__VISUALC__) && (__VISUALC__ >= 1200)
 131   __forceinline
 132 #endif
 133   // VC++ free must take place in same DLL as allocation when using non dll
 134   // run-time library (e.g. Multithreaded instead of Multithreaded DLL)
 135 #if defined(__VISUALC__) && defined(_MT) && !defined(_DLL)
 136   void  Unlock() { if ( !IsEmpty() && --nRefs == 0) Free();  }
 137   // we must not inline deallocation since allocation is not inlined
 138   void  Free();
 139 #else
 140   void  Unlock() { if ( !IsEmpty() && --nRefs == 0) free(this);  }
 141 #endif
 142
 143   // if we had taken control over string memory (GetWriteBuf), it's
 144   // intentionally put in invalid state
 145   void  Validate(bool b)  { nRefs = (b ? 1 : 0); }
 146   bool  IsValid() const   { return (nRefs != 0); }
 147 };
 148
 149 class WXDLLIMPEXP_BASE wxStringImpl
 150 {
 151 public:
 152   // an 'invalid' value for string index, moved to this place due to a CW bug
 153   static const size_t npos;
 154
 155 protected:
 156   // points to data preceded by wxStringData structure with ref count info
 157   wxStringCharType *m_pchData;
 158
 159   // accessor to string data
 160   wxStringData* GetStringData() const { return (wxStringData*)m_pchData - 1; }
 161
 162   // string (re)initialization functions
 163     // initializes the string to the empty value (must be called only from
 164     // ctors, use Reinit() otherwise)
 165 #if wxUSE_UNICODE_UTF8
 166   void Init() { m_pchData = (wxStringCharType *)wxEmptyStringImpl; } // FIXME-UTF8
 167 #else
 168   void Init() { m_pchData = (wxStringCharType *)wxEmptyString; }
 169 #endif
 170     // initializes the string with (a part of) C-string
 171   void InitWith(const wxStringCharType *psz, size_t nPos = 0, size_t nLen = npos);
 172     // as Init, but also frees old data
 173   void Reinit() { GetStringData()->Unlock(); Init(); }
 174
 175   // memory allocation
 176     // allocates memory for string of length nLen
 177   bool AllocBuffer(size_t nLen);
 178     // effectively copies data to string
 179   bool AssignCopy(size_t, const wxStringCharType *);
 180
 181   // append a (sub)string
 182   bool ConcatSelf(size_t nLen, const wxStringCharType *src, size_t nMaxLen);
 183   bool ConcatSelf(size_t nLen, const wxStringCharType *src)
 184     { return ConcatSelf(nLen, src, nLen); }
 185
 186   // functions called before writing to the string: they copy it if there
 187   // are other references to our data (should be the only owner when writing)
 188   bool CopyBeforeWrite();
 189   bool AllocBeforeWrite(size_t);
 190
 191     // compatibility with wxString
 192   bool Alloc(size_t nLen);
 193
 194 public:
 195   // standard types
 196   typedef wxStringCharType value_type;
 197   typedef wxStringCharType char_type;
 198   typedef size_t size_type;
 199   typedef value_type& reference;
 200   typedef const value_type& const_reference;
 201   typedef value_type* pointer;
 202   typedef const value_type* const_pointer;
 203
 204   // macro to define the bulk of iterator and const_iterator classes
 205   #define WX_DEFINE_STRINGIMPL_ITERATOR(iterator_name, ref_type, ptr_type)    \
 206     public:                                                                   \
 207         typedef wxStringCharType value_type;                                  \
 208         typedef ref_type reference;                                           \
 209         typedef ptr_type pointer;                                             \
 210         typedef int difference_type;                                          \
 211                                                                               \
 212         iterator_name() : m_ptr(NULL) { }                                     \
 213         iterator_name(pointer ptr) : m_ptr(ptr) { }                           \
 214                                                                               \
 215         reference operator*() const { return *m_ptr; }                        \
 216                                                                               \
 217         iterator_name& operator++() { m_ptr++; return *this; }                \
 218         iterator_name operator++(int)                                         \
 219         {                                                                     \
 220             const iterator_name tmp(*this);                                   \
 221             m_ptr++;                                                          \
 222             return tmp;                                                       \
 223         }                                                                     \
 224                                                                               \
 225         iterator_name& operator--() { m_ptr--; return *this; }                \
 226         iterator_name operator--(int)                                         \
 227         {                                                                     \
 228             const iterator_name tmp(*this);                                   \
 229             m_ptr--;                                                          \
 230             return tmp;                                                       \
 231         }                                                                     \
 232                                                                               \
 233         iterator_name operator+(ptrdiff_t n) const                            \
 234             { return iterator_name(m_ptr + n); }                              \
 235         iterator_name operator-(ptrdiff_t n) const                            \
 236             { return iterator_name(m_ptr - n); }                              \
 237         iterator_name& operator+=(ptrdiff_t n)                                \
 238             { m_ptr += n; return *this; }                                     \
 239         iterator_name& operator-=(ptrdiff_t n)                                \
 240             { m_ptr -= n; return *this; }                                     \
 241                                                                               \
 242         difference_type operator-(const iterator_name& i) const               \
 243             { return m_ptr - i.m_ptr; }                                       \
 244                                                                               \
 245         bool operator==(const iterator_name& i) const                         \
 246           { return m_ptr == i.m_ptr; }                                        \
 247         bool operator!=(const iterator_name& i) const                         \
 248           { return m_ptr != i.m_ptr; }                                        \
 249                                                                               \
 250         bool operator<(const iterator_name& i) const                          \
 251           { return m_ptr < i.m_ptr; }                                         \
 252         bool operator>(const iterator_name& i) const                          \
 253           { return m_ptr > i.m_ptr; }                                         \
 254         bool operator<=(const iterator_name& i) const                         \
 255           { return m_ptr <= i.m_ptr; }                                        \
 256         bool operator>=(const iterator_name& i) const                         \
 257           { return m_ptr >= i.m_ptr; }                                        \
 258                                                                               \
 259     private:                                                                  \
 260         /* for wxStringImpl use only */                                       \
 261         pointer GetPtr() const { return m_ptr; }                              \
 262                                                                               \
 263         friend class wxStringImpl;                                            \
 264                                                                               \
 265         pointer m_ptr
 266
 267   // we need to declare const_iterator in wxStringImpl scope, the friend
 268   // declaration inside iterator class itself is not enough, or at least not
 269   // for g++ 3.4 (g++ 4 is ok)
 270   class WXDLLIMPEXP_FWD_BASE const_iterator;
 271
 272   class WXDLLIMPEXP_BASE iterator
 273   {
 274     WX_DEFINE_STRINGIMPL_ITERATOR(iterator,
 275                                   wxStringCharType&,
 276                                   wxStringCharType*);
 277
 278     friend class const_iterator;
 279   };
 280
 281   class WXDLLIMPEXP_BASE const_iterator
 282   {
 283   public:
 284       const_iterator(iterator i) : m_ptr(i.m_ptr) { }
 285
 286       WX_DEFINE_STRINGIMPL_ITERATOR(const_iterator,
 287                                     const wxStringCharType&,
 288                                     const wxStringCharType*);
 289   };
 290
 291   #undef WX_DEFINE_STRINGIMPL_ITERATOR
 292
 293
 294   // constructors and destructor
 295     // ctor for an empty string
 296   wxStringImpl() { Init(); }
 297     // copy ctor
 298   wxStringImpl(const wxStringImpl& stringSrc)
 299   {
 300     wxASSERT_MSG( stringSrc.GetStringData()->IsValid(),
 301                   _T("did you forget to call UngetWriteBuf()?") );
 302
 303     if ( stringSrc.empty() ) {
 304       // nothing to do for an empty string
 305       Init();
 306     }
 307     else {
 308       m_pchData = stringSrc.m_pchData;            // share same data
 309       GetStringData()->Lock();                    // => one more copy
 310     }
 311   }
 312     // string containing nRepeat copies of ch
 313   wxStringImpl(size_type nRepeat, wxStringCharType ch);
 314     // ctor takes first nLength characters from C string
 315     // (default value of npos means take all the string)
 316   wxStringImpl(const wxStringCharType *psz)
 317       { InitWith(psz, 0, npos); }
 318   wxStringImpl(const wxStringCharType *psz, size_t nLength)
 319       { InitWith(psz, 0, nLength); }
 320     // take nLen chars starting at nPos
 321   wxStringImpl(const wxStringImpl& str, size_t nPos, size_t nLen)
 322   {
 323     wxASSERT_MSG( str.GetStringData()->IsValid(),
 324                   _T("did you forget to call UngetWriteBuf()?") );
 325     Init();
 326     size_t strLen = str.length() - nPos; nLen = strLen < nLen ? strLen : nLen;
 327     InitWith(str.c_str(), nPos, nLen);
 328   }
 329     // take everything between start and end
 330   wxStringImpl(const_iterator start, const_iterator end);
 331
 332
 333     // ctor from and conversion to std::string
 334 #if wxUSE_STD_STRING
 335   wxStringImpl(const wxStdString& impl)
 336       { InitWith(impl.c_str(), 0, impl.length()); }
 337
 338   operator wxStdString() const
 339       { return wxStdString(c_str(), length()); }
 340 #endif
 341
 342
 343     // dtor is not virtual, this class must not be inherited from!
 344   ~wxStringImpl()
 345   {
 346 #if defined(__VISUALC__) && (__VISUALC__ >= 1200)
 347       //RN - according to the above VC++ does indeed inline this,
 348       //even though it spits out two warnings
 349       #pragma warning (disable:4714)
 350 #endif
 351
 352       GetStringData()->Unlock();
 353   }
 354
 355 #if defined(__VISUALC__) && (__VISUALC__ >= 1200)
 356     //re-enable inlining warning
 357     #pragma warning (default:4714)
 358 #endif
 359   // overloaded assignment
 360     // from another wxString
 361   wxStringImpl& operator=(const wxStringImpl& stringSrc);
 362     // from a character
 363   wxStringImpl& operator=(wxStringCharType ch);
 364     // from a C string
 365   wxStringImpl& operator=(const wxStringCharType *psz);
 366
 367     // return the length of the string
 368   size_type length() const { return GetStringData()->nDataLength; }
 369     // return the length of the string
 370   size_type size() const { return length(); }
 371     // return the maximum size of the string
 372   size_type max_size() const { return npos; }
 373     // resize the string, filling the space with c if c != 0
 374   void resize(size_t nSize, wxStringCharType ch = '\0');
 375     // delete the contents of the string
 376   void clear() { erase(0, npos); }
 377     // returns true if the string is empty
 378   bool empty() const { return length() == 0; }
 379     // inform string about planned change in size
 380   void reserve(size_t sz) { Alloc(sz); }
 381   size_type capacity() const { return GetStringData()->nAllocLength; }
 382
 383   // lib.string.access
 384     // return the character at position n
 385   value_type operator[](size_type n) const { return m_pchData[n]; }
 386   value_type at(size_type n) const
 387     { wxASSERT_VALID_INDEX( n ); return m_pchData[n]; }
 388     // returns the writable character at position n
 389   reference operator[](size_type n) { CopyBeforeWrite(); return m_pchData[n]; }
 390   reference at(size_type n)
 391   {
 392     wxASSERT_VALID_INDEX( n );
 393     CopyBeforeWrite();
 394     return m_pchData[n];
 395   } // FIXME-UTF8: not useful for us...?
 396
 397   // lib.string.modifiers
 398     // append elements str[pos], ..., str[pos+n]
 399   wxStringImpl& append(const wxStringImpl& str, size_t pos, size_t n)
 400   {
 401     wxASSERT(pos <= str.length());
 402     ConcatSelf(n, str.c_str() + pos, str.length() - pos);
 403     return *this;
 404   }
 405     // append a string
 406   wxStringImpl& append(const wxStringImpl& str)
 407     { ConcatSelf(str.length(), str.c_str()); return *this; }
 408     // append first n (or all if n == npos) characters of sz
 409   wxStringImpl& append(const wxStringCharType *sz)
 410     { ConcatSelf(wxStrlen(sz), sz); return *this; }
 411   wxStringImpl& append(const wxStringCharType *sz, size_t n)
 412     { ConcatSelf(n, sz); return *this; }
 413     // append n copies of ch
 414   wxStringImpl& append(size_t n, wxStringCharType ch);
 415     // append from first to last
 416   wxStringImpl& append(const_iterator first, const_iterator last)
 417     { ConcatSelf(last - first, first.GetPtr()); return *this; }
 418
 419     // same as `this_string = str'
 420   wxStringImpl& assign(const wxStringImpl& str)
 421     { return *this = str; }
 422     // same as ` = str[pos..pos + n]
 423   wxStringImpl& assign(const wxStringImpl& str, size_t pos, size_t n)
 424     { return replace(0, npos, str, pos, n); }
 425     // same as `= first n (or all if n == npos) characters of sz'
 426   wxStringImpl& assign(const wxStringCharType *sz)
 427     { return replace(0, npos, sz, wxStrlen(sz)); }
 428   wxStringImpl& assign(const wxStringCharType *sz, size_t n)
 429     { return replace(0, npos, sz, n); }
 430     // same as `= n copies of ch'
 431   wxStringImpl& assign(size_t n, wxStringCharType ch)
 432     { return replace(0, npos, n, ch); }
 433     // assign from first to last
 434   wxStringImpl& assign(const_iterator first, const_iterator last)
 435     { return replace(begin(), end(), first, last); }
 436
 437     // first valid index position
 438   const_iterator begin() const { return m_pchData; }
 439   iterator begin();
 440     // position one after the last valid one
 441   const_iterator end() const { return m_pchData + length(); }
 442   iterator end();
 443
 444     // insert another string
 445   wxStringImpl& insert(size_t nPos, const wxStringImpl& str)
 446   {
 447     wxASSERT( str.GetStringData()->IsValid() );
 448     return insert(nPos, str.c_str(), str.length());
 449   }
 450     // insert n chars of str starting at nStart (in str)
 451   wxStringImpl& insert(size_t nPos, const wxStringImpl& str, size_t nStart, size_t n)
 452   {
 453     wxASSERT( str.GetStringData()->IsValid() );
 454     wxASSERT( nStart < str.length() );
 455     size_t strLen = str.length() - nStart;
 456     n = strLen < n ? strLen : n;
 457     return insert(nPos, str.c_str() + nStart, n);
 458   }
 459     // insert first n (or all if n == npos) characters of sz
 460   wxStringImpl& insert(size_t nPos, const wxStringCharType *sz, size_t n = npos);
 461     // insert n copies of ch
 462   wxStringImpl& insert(size_t nPos, size_t n, wxStringCharType ch)
 463     { return insert(nPos, wxStringImpl(n, ch)); }
 464   iterator insert(iterator it, wxStringCharType ch)
 465     { size_t idx = it - begin(); insert(idx, 1, ch); return begin() + idx; }
 466   void insert(iterator it, const_iterator first, const_iterator last)
 467     { insert(it - begin(), first.GetPtr(), last - first); }
 468   void insert(iterator it, size_type n, wxStringCharType ch)
 469     { insert(it - begin(), n, ch); }
 470
 471     // delete characters from nStart to nStart + nLen
 472   wxStringImpl& erase(size_type pos = 0, size_type n = npos);
 473   iterator erase(iterator first, iterator last)
 474   {
 475     size_t idx = first - begin();
 476     erase(idx, last - first);
 477     return begin() + idx;
 478   }
 479   iterator erase(iterator first);
 480
 481   // explicit conversion to C string (use this with printf()!)
 482   const wxStringCharType* c_str() const { return m_pchData; }
 483   const wxStringCharType* data() const { return m_pchData; }
 484
 485     // replaces the substring of length nLen starting at nStart
 486   wxStringImpl& replace(size_t nStart, size_t nLen, const wxStringCharType* sz)
 487     { return replace(nStart, nLen, sz, npos); }
 488     // replaces the substring of length nLen starting at nStart
 489   wxStringImpl& replace(size_t nStart, size_t nLen, const wxStringImpl& str)
 490     { return replace(nStart, nLen, str.c_str(), str.length()); }
 491     // replaces the substring with nCount copies of ch
 492   wxStringImpl& replace(size_t nStart, size_t nLen,
 493                         size_t nCount, wxStringCharType ch)
 494     { return replace(nStart, nLen, wxStringImpl(nCount, ch)); }
 495     // replaces a substring with another substring
 496   wxStringImpl& replace(size_t nStart, size_t nLen,
 497                         const wxStringImpl& str, size_t nStart2, size_t nLen2)
 498     { return replace(nStart, nLen, str.substr(nStart2, nLen2)); }
 499     // replaces the substring with first nCount chars of sz
 500   wxStringImpl& replace(size_t nStart, size_t nLen,
 501                         const wxStringCharType* sz, size_t nCount);
 502
 503   wxStringImpl& replace(iterator first, iterator last, const_pointer s)
 504     { return replace(first - begin(), last - first, s); }
 505   wxStringImpl& replace(iterator first, iterator last, const_pointer s,
 506                         size_type n)
 507     { return replace(first - begin(), last - first, s, n); }
 508   wxStringImpl& replace(iterator first, iterator last, const wxStringImpl& s)
 509     { return replace(first - begin(), last - first, s); }
 510   wxStringImpl& replace(iterator first, iterator last, size_type n, wxStringCharType c)
 511     { return replace(first - begin(), last - first, n, c); }
 512   wxStringImpl& replace(iterator first, iterator last,
 513                         const_iterator first1, const_iterator last1)
 514     { return replace(first - begin(), last - first, first1.GetPtr(), last1 - first1); }
 515
 516     // swap two strings
 517   void swap(wxStringImpl& str);
 518
 519     // All find() functions take the nStart argument which specifies the
 520     // position to start the search on, the default value is 0. All functions
 521     // return npos if there were no match.
 522
 523     // find a substring
 524   size_t find(const wxStringImpl& str, size_t nStart = 0) const;
 525
 526     // find first n characters of sz
 527   size_t find(const wxStringCharType* sz, size_t nStart = 0, size_t n = npos) const;
 528
 529     // find the first occurrence of character ch after nStart
 530   size_t find(wxStringCharType ch, size_t nStart = 0) const;
 531
 532     // rfind() family is exactly like find() but works right to left
 533
 534     // as find, but from the end
 535   size_t rfind(const wxStringImpl& str, size_t nStart = npos) const;
 536
 537     // as find, but from the end
 538   size_t rfind(const wxStringCharType* sz, size_t nStart = npos,
 539                size_t n = npos) const;
 540     // as find, but from the end
 541   size_t rfind(wxStringCharType ch, size_t nStart = npos) const;
 542
 543   size_type copy(wxStringCharType* s, size_type n, size_type pos = 0);
 544
 545   // substring extraction
 546   wxStringImpl substr(size_t nStart = 0, size_t nLen = npos) const;
 547
 548       // string += string
 549   wxStringImpl& operator+=(const wxStringImpl& s) { return append(s); }
 550       // string += C string
 551   wxStringImpl& operator+=(const wxStringCharType *psz) { return append(psz); }
 552       // string += char
 553   wxStringImpl& operator+=(wxStringCharType ch) { return append(1, ch); }
 554
 555   // helpers for wxStringBuffer and wxStringBufferLength
 556   wxStringCharType *DoGetWriteBuf(size_t nLen);
 557   void DoUngetWriteBuf();
 558   void DoUngetWriteBuf(size_t nLen);
 559
 560   friend class WXDLLIMPEXP_FWD_BASE wxString;
 561 };
 562
 563 #endif // !wxUSE_STL_BASED_WXSTRING
 564
 565 // don't pollute the library user's name space
 566 #undef wxASSERT_VALID_INDEX
 567
 568 #endif  // _WX_WXSTRINGIMPL_H__