From 5a6ea019fd48b269121f95dc4afabce760531bbe Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Wed, 9 May 2012 11:49:37 +0200
Subject: Make regex class template

---
 cutl/re/re.cxx | 202 +++++++++++++++++++++++++++++++++------------------------
 1 file changed, 119 insertions(+), 83 deletions(-)

(limited to 'cutl/re/re.cxx')

diff --git a/cutl/re/re.cxx b/cutl/re/re.cxx
index 8a15158..8e46d59 100644
--- a/cutl/re/re.cxx
+++ b/cutl/re/re.cxx
@@ -2,8 +2,6 @@
 // copyright : Copyright (c) 2009-2012 Code Synthesis Tools CC
 // license   : MIT; see accompanying LICENSE file
 
-#include <ostream>
-
 #include <cutl/re.hxx>
 
 #ifndef LIBCUTL_EXTERNAL_BOOST
@@ -19,53 +17,83 @@ namespace cutl
   namespace re
   {
     //
-    // format
+    // format_base
     //
 
-    format::
-    ~format () throw ()
+    format_base::
+    ~format_base () throw ()
     {
     }
 
-    char const* format::
+    char const* format_base::
     what () const throw ()
     {
       return description_.c_str ();
     }
 
     //
-    // regex
+    // basic_regex
     //
-    struct regex::impl
+    template <typename C>
+    struct basic_regex<C>::impl
     {
+      typedef basic_string<C> string_type;
+      typedef tr1::basic_regex<C> regex_type;
+
       impl () {}
-      impl (string const& s): r (s, tr1::regex_constants::ECMAScript) {}
-      impl (tr1::regex const& r): r (r) {}
+      impl (string_type const& s): r (s, tr1::regex_constants::ECMAScript) {}
+      impl (regex_type const& r): r (r) {}
 
-      tr1::regex r;
+      regex_type r;
     };
 
-    regex::
-    ~regex ()
+    template <>
+    basic_regex<char>::
+    ~basic_regex ()
     {
       delete impl_;
     }
 
-    regex::
-    regex (regex const& r)
+    template <>
+    basic_regex<wchar_t>::
+    ~basic_regex ()
+    {
+      delete impl_;
+    }
+
+    template <>
+    basic_regex<char>::
+    basic_regex (basic_regex const& r)
         : impl_ (new impl (r.impl_->r))
     {
     }
 
-    regex& regex::
-    operator= (regex const& r)
+    template <>
+    basic_regex<wchar_t>::
+    basic_regex (basic_regex const& r)
+        : impl_ (new impl (r.impl_->r))
+    {
+    }
+
+    template <>
+    basic_regex<char>& basic_regex<char>::
+    operator= (basic_regex const& r)
+    {
+      impl_->r = r.impl_->r;
+      return *this;
+    }
+
+    template <>
+    basic_regex<wchar_t>& basic_regex<wchar_t>::
+    operator= (basic_regex const& r)
     {
       impl_->r = r.impl_->r;
       return *this;
     }
 
-    void regex::
-    init (string const* s)
+    template <>
+    void basic_regex<char>::
+    init (string_type const* s)
     {
       try
       {
@@ -76,24 +104,60 @@ namespace cutl
       }
       catch (tr1::regex_error const& e)
       {
-        throw format (s == 0 ? "" : *s, e.what ());
+        throw basic_format<char> (s == 0 ? "" : *s, e.what ());
       }
     }
 
-    bool regex::
-    match (string const& s) const
+    template <>
+    void basic_regex<wchar_t>::
+    init (string_type const* s)
+    {
+      try
+      {
+        if (impl_ == 0)
+          impl_ = s == 0 ? new impl : new impl (*s);
+        else
+          impl_->r = *s;
+      }
+      catch (tr1::regex_error const& e)
+      {
+        throw basic_format<wchar_t> (s == 0 ? L"" : *s, e.what ());
+      }
+    }
+
+    template <>
+    bool basic_regex<char>::
+    match (string_type const& s) const
+    {
+      return tr1::regex_match (s, impl_->r);
+    }
+
+    template <>
+    bool basic_regex<wchar_t>::
+    match (string_type const& s) const
     {
       return tr1::regex_match (s, impl_->r);
     }
 
-    bool regex::
-    search (string const& s) const
+    template <>
+    bool basic_regex<char>::
+    search (string_type const& s) const
+    {
+      return tr1::regex_search (s, impl_->r);
+    }
+
+    template <>
+    bool basic_regex<wchar_t>::
+    search (string_type const& s) const
     {
       return tr1::regex_search (s, impl_->r);
     }
 
-    string regex::
-    replace (string const& s, string const& sub, bool first_only) const
+    template <>
+    string basic_regex<char>::
+    replace (string_type const& s,
+             string_type const& sub,
+             bool first_only) const
     {
       tr1::regex_constants::match_flag_type f (
         tr1::regex_constants::format_default);
@@ -101,78 +165,50 @@ namespace cutl
       if (first_only)
         f |= tr1::regex_constants::format_first_only;
 
-      return regex_replace (s, impl_->r, sub, f);
+      return tr1::regex_replace (s, impl_->r, sub, f);
     }
 
-    string regex::
-    str () const
+    template <>
+    wstring basic_regex<wchar_t>::
+    replace (string_type const& s,
+             string_type const& sub,
+             bool first_only) const
     {
-      return impl_->r.str ();
+      tr1::regex_constants::match_flag_type f (
+        tr1::regex_constants::format_default);
+
+      if (first_only)
+        f |= tr1::regex_constants::format_first_only;
+
+      return tr1::regex_replace (s, impl_->r, sub, f);
     }
 
-    bool regex::
-    empty () const
+    template <>
+    string basic_regex<char>::
+    str () const
     {
-      return impl_->r.empty ();
+      return impl_->r.str ();
     }
 
-    ostream&
-    operator<< (ostream& os, regex const& r)
+    template <>
+    wstring basic_regex<wchar_t>::
+    str () const
     {
-      return os << r.str ().c_str ();
+      return impl_->r.str ();
     }
 
-    //
-    // regexsub
-    //
-    void regexsub::
-    init (string const& s)
+    template <>
+    bool basic_regex<char>::
+    empty () const
     {
-      string r;
-      string::size_type p (parse (s, 0, r));
-      regex_ = r;
-      p = parse (s, p, sub_);
-      if (p + 1 < s.size ())
-        throw format (s, "junk after third delimiter");
+      return impl_->r.empty ();
     }
 
-    //
-    // parse()
-    //
-    string::size_type
-    parse (string const& s, string::size_type p, string& r)
+    template <>
+    bool basic_regex<wchar_t>::
+    empty () const
     {
-      r.clear ();
-      string::size_type n (s.size ());
-
-      if (p >= n)
-        throw format (s, "empty expression");
-
-      char d (s[p++]);
-
-      for (; p < n; ++p)
-      {
-        if (s[p] == d)
-          break;
-
-        if (s[p] == '\\')
-        {
-          if (++p < n)
-          {
-            if (s[p] != d && s[p] != '\\')
-              r += '\\';
-            r += s[p];
-          }
-          // else {we ran out of stuff before finding the delimiter}
-        }
-        else
-          r += s[p];
-      }
-
-      if (p == n)
-        throw format (s, "missing closing delimiter");
-
-      return p;
+      return impl_->r.empty ();
     }
   }
 }
-- 
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