X-Git-Url: http://git.tdb.fi/?p=libs%2Fcore.git;a=blobdiff_plain;f=source%2Fstrings%2Flexicalcast.h;h=c6a17da3491d053b6460399fddea6473ea1ca839;hp=b41654d1537a822f8a13af2d1a0616a4761d0e2f;hb=42ff7c629b2aa7411963bdcc2259a06b1d1de6d3;hpb=4a38eb20402936497cbb75527dd7a7b321f51415

diff --git a/source/strings/lexicalcast.h b/source/strings/lexicalcast.h
index b41654d..c6a17da 100644
--- a/source/strings/lexicalcast.h
+++ b/source/strings/lexicalcast.h
@@ -1,10 +1,3 @@
-/* $Id$
-
-This file is part of libmspstrings
-Copyright © 2006-2008 Mikko Rasa
-Distributed under the LGPL
-*/
-
 #ifndef MSP_STRINGS_LEXICALCAST_H_
 #define MSP_STRINGS_LEXICALCAST_H_
 
@@ -113,23 +106,51 @@ void operator>>(const LexicalConverter &c, T &v)
 		throw lexical_error("conversion failure");
 }
 
-// The main interface to the lexical conversion machinery
+// Helper struct to provide partial template specialization
+
+template<typename T, typename F>
+struct LexicalCast;
 
 template<typename T>
-inline T lexical_cast(const std::string &s, const Fmt &f = Fmt())
+struct LexicalCast<T, std::string>
 {
-	LexicalConverter conv(s, f);
-	T result;
-	conv>>result;
-	return result;
-}
+	static T cast(const std::string &s, const Fmt &f = Fmt())
+	{
+		LexicalConverter conv(s, f);
+		T result;
+		conv>>result;
+		return result;
+	}
+};
 
-template<typename T>
-inline std::string lexical_cast(const T &v, const Fmt &f = Fmt())
+template<typename F>
+struct LexicalCast<std::string, F>
+{
+	static std::string cast(const F &v, const Fmt &f = Fmt())
+	{
+		LexicalConverter conv(f);
+		conv<<v;
+		return conv.get();
+	}
+};
+
+template<>
+struct LexicalCast<std::string, std::string>
+{
+	static std::string cast(const std::string &v, const Fmt &f = Fmt())
+	{
+		LexicalConverter conv(f);
+		conv<<v;
+		return conv.get();
+	}
+};
+
+// The main interface to the lexical conversion machinery
+
+template<typename T, typename F>
+inline T lexical_cast(const F &v, const Fmt &f = Fmt())
 {
-	LexicalConverter conv(f);
-	conv<<v;
-	return conv.get();
+	return LexicalCast<T, F>::cast(v, f);
 }
 
 } // namespace Msp