Add some utility functions for joining strings

[libs/core.git] / source / strings / format.h

diff --git a/source/strings/format.h b/source/strings/format.h
index 6d8f739a436c3abaa8fdbbbdc7292e5dfb803d1d..ea5d5b070090c770671fc7821435a520e333321c 100644 (file)
--- a/source/strings/format.h
+++ b/source/strings/format.h
@@ -18,17 +18,27 @@ private:
 
 public:
        Formatter(const std::string &);
+       Formatter(const Formatter &);
+       Formatter &operator=(const Formatter &);
 
        /** Extracts the next conversion from the format string and formats the
        given value with it.  Will throw if no more conversions are found. */
        template<typename T>
        Formatter &operator()(const T &a)
        {
-               result += lexical_cast(a, get_conversion());
+               result += lexical_cast<std::string>(a, get_conversion());
                advance();
                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 +57,14 @@ 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 +84,7 @@ 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