add doxygen tags to the internal fast string stuff

Change-Id: Ie5026c116f9cc7d5b10981d53881f8a0d7986a68

sal/inc/rtl/strbuf.hxx

@@ -225,6 +225,10 @@ public:
     }
 
 #ifdef RTL_FAST_STRING
+    /**
+     @overload
+     @internal
+    */
     template< typename T1, typename T2 >
     OStringBuffer( const OStringConcat< T1, T2 >& c )
     {
@@ -854,6 +858,9 @@ private:
 };
 
 #ifdef RTL_FAST_STRING
+/**
+ @internal
+*/
 template<>
 struct ToStringHelper< OStringBuffer >
     {

sal/inc/rtl/string.hxx

@@ -257,6 +257,10 @@ public:
     }
 
 #ifdef RTL_FAST_STRING
+    /**
+     @overload
+     @internal
+    */
     template< typename T1, typename T2 >
     OString( const OStringConcat< T1, T2 >& c )
     {
@@ -1484,6 +1488,9 @@ struct SAL_WARN_UNUSED OStringLiteral
     const char* data;
 };
 
+/**
+ @internal
+*/
 template<>
 struct ToStringHelper< OString >
     {
@@ -1493,6 +1500,9 @@ struct ToStringHelper< OString >
     static const bool allowOUStringConcat = false;
     };
 
+/**
+ @internal
+*/
 template<>
 struct ToStringHelper< OStringLiteral >
     {
@@ -1502,6 +1512,9 @@ struct ToStringHelper< OStringLiteral >
     static const bool allowOUStringConcat = false;
     };
 
+/**
+ @internal
+*/
 template< typename charT, typename traits, typename T1, typename T2 >
 inline std::basic_ostream<charT, traits> & operator <<(
     std::basic_ostream<charT, traits> & stream, const OStringConcat< T1, T2 >& concat)

sal/inc/rtl/ustrbuf.hxx

@@ -217,6 +217,10 @@ public:
 #endif
 
 #ifdef RTL_FAST_STRING
+    /**
+     @overload
+     @internal
+    */
     template< typename T1, typename T2 >
     OUStringBuffer( const OUStringConcat< T1, T2 >& c )
     {
@@ -1250,6 +1254,9 @@ private:
 };
 
 #ifdef RTL_FAST_STRING
+/**
+ @internal
+*/
 template<>
 struct ToStringHelper< OUStringBuffer >
     {

sal/inc/rtl/ustring.hxx

@@ -325,6 +325,10 @@ public:
     }
 
 #ifdef RTL_FAST_STRING
+    /**
+     @overload
+     @internal
+    */
     template< typename T1, typename T2 >
     OUString( const OUStringConcat< T1, T2 >& c )
     {
@@ -2124,6 +2128,9 @@ struct SAL_WARN_UNUSED OUStringLiteral
     const char* data;
 };
 
+/**
+ @internal
+*/
 template<>
 struct ToStringHelper< OUString >
     {
@@ -2133,6 +2140,9 @@ struct ToStringHelper< OUString >
     static const bool allowOUStringConcat = true;
     };
 
+/**
+ @internal
+*/
 template<>
 struct ToStringHelper< OUStringLiteral >
     {
@@ -2142,6 +2152,9 @@ struct ToStringHelper< OUStringLiteral >
     static const bool allowOUStringConcat = true;
     };
 
+/**
+ @internal
+*/
 template< typename charT, typename traits, typename T1, typename T2 >
 inline std::basic_ostream<charT, traits> & operator <<(
     std::basic_ostream<charT, traits> & stream, const OUStringConcat< T1, T2 >& concat)