From: Mikko Rasa <tdb@tdb.fi>
Date: Tue, 2 Aug 2016 09:16:25 +0000 (+0300)
Subject: Use variadic templates for format and print functions if available
X-Git-Url: http://git.tdb.fi/?p=libs%2Fcore.git;a=commitdiff_plain;h=4e8408b966dfe65d971237c72a892f4720d885b1

Use variadic templates for format and print functions if available
---

diff --git a/source/io/print.h b/source/io/print.h
index 8e9fde5..29da9f4 100644
--- a/source/io/print.h
+++ b/source/io/print.h
@@ -15,6 +15,12 @@ completeness with the other print functions.
 inline unsigned print(Base &o, const std::string &f)
 { return o.write(f); }
 
+#if __cplusplus>=201103L
+template<typename... Args>
+inline unsigned print(Base &o, const std::string &f, Args... args)
+{ return print(o, format(f, args...)); }
+
+#else
 template<typename A1>
 inline unsigned print(Base &o, const std::string &f, A1 a1)
 { return print(o, format(f, a1)); }
@@ -34,12 +40,19 @@ inline unsigned print(Base &o, const std::string &f, A1 a1, A2 a2, A3 a3, A4 a4)
 template<typename A1, typename A2, typename A3, typename A4, typename A5>
 inline unsigned print(Base &o, const std::string &f, A1 a1, A2 a2, A3 a3, A4 a4, A5 a5)
 { return print(o, format(f, a1, a2, a3, a4, a5)); }
+#endif
 
 /* The following functions print to console */
 
 inline unsigned print(const std::string &f)
 { return print(cout, f); }
 
+#if __cplusplus>=201103L
+template<typename... Args>
+inline unsigned print(const std::string &f, Args... args)
+{ return print(cout, f, args...); }
+
+#else
 template<typename A1>
 inline unsigned print(const std::string &f, A1 a1)
 { return print(cout, f, a1); }
@@ -59,6 +72,7 @@ inline unsigned print(const std::string &f, A1 a1, A2 a2, A3 a3, A4 a4)
 template<typename A1, typename A2, typename A3, typename A4, typename A5>
 inline unsigned print(const std::string &f, A1 a1, A2 a2, A3 a3, A4 a4, A5 a5)
 { return print(cout, f, a1, a2, a3, a4, a5); }
+#endif
 
 } // namespace IO
 } // namespace Msp
diff --git a/source/strings/format.h b/source/strings/format.h
index 65d10df..7bd8264 100644
--- a/source/strings/format.h
+++ b/source/strings/format.h
@@ -29,6 +29,14 @@ public:
 		return *this;
 	}
 
+#if __cplusplus>=201103L
+	template<typename T, typename... Tail>
+	Formatter &operator()(const T &a, const Tail &... tail)
+	{
+		return (*this)(a)(tail...);
+	}
+#endif
+
 	/** Returns the result of the formatting operation.  Will throw if not
 	enough values have been fed to the formatter. */
 	const std::string &str() const;
@@ -47,6 +55,14 @@ private:
 inline Formatter format(const std::string &f)
 { return Formatter(f); }
 
+#if __cplusplus >= 201103L
+template<typename... Args>
+inline std::string format(const std::string &f, const Args &... args)
+{
+	return Formatter(f)(args...).str();
+}
+
+#else
 template<typename A1>
 inline std::string format(const std::string &f, const A1 &a1)
 { return Formatter(f)(a1).str(); }
@@ -66,6 +82,7 @@ inline std::string format(const std::string &f, const A1 &a1, const A2 &a2, cons
 template<typename A1, typename A2, typename A3, typename A4, typename A5>
 inline std::string format(const std::string &f, const A1 &a1, const A2 &a2, const A3 &a3, const A4 &a4, const A5 &a5)
 { return Formatter(f)(a1)(a2)(a3)(a4)(a5).str(); }
+#endif
 
 } // namespace Msp