added wxRegEx::GetMatchCount (patch 938995)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@26904 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/regex.tex

@@ -170,6 +170,16 @@ May only be called after successful call to \helpref{Matches()}{wxregexmatches}
 and only if {\tt wxRE\_NOSUB} was {\bf not} used in 
 \helpref{Compile()}{wxregexcompile}.
 
+\membersection{wxRegEx::GetMatchCount}\label{wxregexgetmatchcount}
+
+\constfunc{size\_t}{GetMatchCount}{\void}
+
+Returns the size of the array of matches, i.e. the number of bracketed
+subexpressions plus one for the expression itself, or $0$ on error.
+
+May only be called after successful call to \helpref{Compile()}{wxregexcompile}.
+and only if {\tt wxRE\_NOSUB} was {\bf not} used.
+
 \membersection{wxRegEx::Matches}\label{wxregexmatches}
 
 \constfunc{bool}{Matches}{\param{const wxChar* }{text}, \param{int }{flags = 0}}

include/wx/regex.h

@@ -116,6 +116,12 @@ public:
     // may only be called after successful call to Matches()
     wxString GetMatch(const wxString& text, size_t index = 0) const;
 
+    // return the size of the array of matches, i.e. the number of bracketed
+    // subexpressions plus one for the expression itself, or 0 on error.
+    //
+    // may only be called after successful call to Compile()
+    size_t GetMatchCount() const;
+
     // replaces the current regular expression in the string pointed to by
     // pattern, with the text in replacement and return number of matches
     // replaced (maybe 0 if none found) or -1 on error

src/common/regex.cpp

@@ -68,6 +68,7 @@ public:
     bool Compile(const wxString& expr, int flags = 0);
     bool Matches(const wxChar *str, int flags = 0) const;
     bool GetMatch(size_t *start, size_t *len, size_t index = 0) const;
+    size_t GetMatchCount() const;
     int Replace(wxString *pattern, const wxString& replacement,
                 size_t maxMatches = 0) const;
 
@@ -242,9 +243,12 @@ bool wxRegExImpl::Compile(const wxString& expr, int flags)
                 {
                     // we know that the previous character is not an unquoted
                     // backslash because it would have been eaten above, so we
-                    // have a bar '(' and this indicates a group start for the
-                    // extended syntax
-                    m_nMatches++;
+                    // have a bare '(' and this indicates a group start for the
+                    // extended syntax. '(?' is used for extensions by perl-
+                    // like REs (e.g. advanced), and is not valid for POSIX
+                    // extended, so ignore them always.
+                    if ( cptr[1] != _T('?') )
+                        m_nMatches++;
                 }
             }
         }
@@ -306,7 +310,8 @@ bool wxRegExImpl::Matches(const wxChar *str, int flags) const
 bool wxRegExImpl::GetMatch(size_t *start, size_t *len, size_t index) const
 {
     wxCHECK_MSG( IsValid(), FALSE, _T("must successfully Compile() first") );
-    wxCHECK_MSG( m_Matches, FALSE, _T("can't use with wxRE_NOSUB") );
+    wxCHECK_MSG( m_nMatches, FALSE, _T("can't use with wxRE_NOSUB") );
+    wxCHECK_MSG( m_Matches, FALSE, _T("must call Matches() first") );
     wxCHECK_MSG( index < m_nMatches, FALSE, _T("invalid match index") );
 
     const regmatch_t& match = m_Matches[index];
@@ -319,6 +324,14 @@ bool wxRegExImpl::GetMatch(size_t *start, size_t *len, size_t index) const
     return TRUE;
 }
 
+size_t wxRegExImpl::GetMatchCount() const
+{
+    wxCHECK_MSG( IsValid(), 0, _T("must successfully Compile() first") );
+    wxCHECK_MSG( m_nMatches, 0, _T("can't use with wxRE_NOSUB") );
+
+    return m_nMatches;
+}
+
 int wxRegExImpl::Replace(wxString *text,
                          const wxString& replacement,
                          size_t maxMatches) const
@@ -487,6 +500,13 @@ wxString wxRegEx::GetMatch(const wxString& text, size_t index) const
     return text.Mid(start, len);
 }
 
+size_t wxRegEx::GetMatchCount() const
+{
+    wxCHECK_MSG( IsValid(), 0, _T("must successfully Compile() first") );
+
+    return m_impl->GetMatchCount();
+}
+
 int wxRegEx::Replace(wxString *pattern,
                      const wxString& replacement,
                      size_t maxMatches) const