added test for writing empty value to the config

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

diff --git a/include/wx/string.h b/include/wx/string.h
index 49c27ba2f74db49c3c89b773244f666fa1f8a7c6..7bb5e7db412a17f3bd12a011df89557081010fe1 100644 (file)
--- a/include/wx/string.h
+++ b/include/wx/string.h
@@ -120,14 +120,14 @@ WXDLLEXPORT_DATA(extern const wxChar*) wxEmptyString;
 // backwards compatibility only.
 
 // checks whether the passed in pointer is NULL and if the string is empty
-inline bool WXDLLEXPORT IsEmpty(const char *p) { return (!p || !*p); }
+inline bool IsEmpty(const char *p) { return (!p || !*p); }
 
 // safe version of strlen() (returns 0 if passed NULL pointer)
-inline size_t WXDLLEXPORT Strlen(const char *psz)
+inline size_t Strlen(const char *psz)
   { return psz ? strlen(psz) : 0; }
 
 // portable strcasecmp/_stricmp
-inline int WXDLLEXPORT Stricmp(const char *psz1, const char *psz2)
+inline int Stricmp(const char *psz1, const char *psz2)
 {
 #if defined(__VISUALC__) || ( defined(__MWERKS__) && defined(__INTEL__) )
   return _stricmp(psz1, psz2);
@@ -401,6 +401,28 @@ public:
     wxChar& Last()
       { wxASSERT( !IsEmpty() ); CopyBeforeWrite(); return m_pchData[Len()-1]; }
 
+    /*
+        So why do we have all these overloaded operator[]s? A bit of history:
+        initially there was only one of them, taking size_t. Then people
+        started complaining because they wanted to use ints as indices (I
+        wonder why) and compilers were giving warnings about it, so we had to
+        add the operator[](int). Then it became apparent that you couldn't
+        write str[0] any longer because there was ambiguity between two
+        overloads and so you now had to write str[0u] (or, of course, use the
+        explicit casts to either int or size_t but nobody did this).
+
+        Finally, someone decided to compile wxWin on an Alpha machine and got
+        a surprize: str[0u] didn't compile there because it is of type
+        unsigned int and size_t is unsigned _long_ on Alpha and so there was
+        ambiguity between converting uint to int or ulong. To fix this one we
+        now add operator[](uint) for the machines where size_t is not already
+        the same as unsigned int - hopefully this fixes the problem (for some
+        time)
+
+        The only real fix is, of course, to remove all versions but the one
+        taking size_t...
+     */
+
     // operator version of GetChar
     wxChar  operator[](size_t n) const
       { ASSERT_VALID_INDEX( n ); return m_pchData[n]; }
@@ -408,20 +430,20 @@ public:
     // operator version of GetChar
     wxChar  operator[](int n) const
       { ASSERT_VALID_INDEX( n ); return m_pchData[n]; }
-#ifdef __alpha__
-    // operator version of GetChar
-    wxChar  operator[](unsigned int n) const
-      { ASSERT_VALID_INDEX( n ); return m_pchData[n]; }
-#endif
 
     // operator version of GetWriteableChar
     wxChar& operator[](size_t n)
       { ASSERT_VALID_INDEX( n ); CopyBeforeWrite(); return m_pchData[n]; }
-#ifdef __alpha__
+
+#ifndef wxSIZE_T_IS_UINT
+    // operator version of GetChar
+    wxChar operator[](unsigned int n) const
+      { ASSERT_VALID_INDEX( n ); return m_pchData[n]; }
+
     // operator version of GetWriteableChar
-    wxChar&  operator[](unsigned int n)
+    wxChar& operator[](unsigned int n)
       { ASSERT_VALID_INDEX( n ); CopyBeforeWrite(); return m_pchData[n]; }
-#endif
+#endif // size_t != unsigned int
 
     // implicit conversion to C string
     operator const wxChar*() const { return m_pchData; }
@@ -1126,14 +1148,14 @@ wxString WXDLLEXPORT operator+(wxChar ch, const wxString& string);
 wxString WXDLLEXPORT operator+(const wxString& string, const wxChar *psz);
 wxString WXDLLEXPORT operator+(const wxChar *psz, const wxString& string);
 #if wxUSE_UNICODE
-inline wxString WXDLLEXPORT operator+(const wxString& string, const wxWCharBuffer& buf)
+inline wxString operator+(const wxString& string, const wxWCharBuffer& buf)
     { return string + (const wchar_t *)buf; }
-inline wxString WXDLLEXPORT operator+(const wxWCharBuffer& buf, const wxString& string)
+inline wxString operator+(const wxWCharBuffer& buf, const wxString& string)
     { return (const wchar_t *)buf + string; }
 #else // !wxUSE_UNICODE
-inline wxString WXDLLEXPORT operator+(const wxString& string, const wxCharBuffer& buf)
+inline wxString operator+(const wxString& string, const wxCharBuffer& buf)
     { return string + (const char *)buf; }
-inline wxString WXDLLEXPORT operator+(const wxCharBuffer& buf, const wxString& string)
+inline wxString operator+(const wxCharBuffer& buf, const wxString& string)
     { return (const char *)buf + string; }
 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 
@@ -1148,8 +1170,8 @@ inline wxString WXDLLEXPORT operator+(const wxCharBuffer& buf, const wxString& s
 
 #include "wx/ioswrap.h"
 
-WXDLLEXPORT istream& operator>>(istream&, wxString&);
-WXDLLEXPORT ostream& operator<<(ostream&, const wxString&);
+WXDLLEXPORT wxSTD istream& operator>>(wxSTD istream&, wxString&);
+WXDLLEXPORT wxSTD ostream& operator<<(wxSTD ostream&, const wxString&);
 
 #endif  // wxSTD_STRING_COMPATIBILITY