Add template for generic container element join

premake.make

@@ -12,7 +12,7 @@ PRODUCT := lib
 
 # Single source of truth for version.
 MAJOR := 1
-MINOR := 4
+MINOR := 5
 PATCH := 0
 
 # Specify desired C++ standard for this project.

src/string_utils.cpp

@@ -26,20 +26,14 @@ vector<string> sc::split(const string& str, const string& sep)
     return components;
 }
 
-vector<string> sc::split(const string& str, const regex& sep) {
+vector<string> sc::split(const string& str, const regex& sep)
+{
     return {sregex_token_iterator {str.begin(), str.end(), sep, -1}, sregex_token_iterator {}};
 }
 
 string sc::join(const vector<string>& components, const string& join)
 {
-    string result;
+    return sc::join<vector<string>::const_iterator>(components.cbegin(), components.cend(), join);
-    for (vector<string>::const_iterator i = components.cbegin(); i != components.cend(); ++i) {
-        if (i != components.cbegin()) {
-            result += join;
-        }
-        result += *i;
-    }
-    return result;
 }
 
 string sc::trim(const string& str, const string& del)

src/string_utils.hpp

@@ -22,9 +22,22 @@ namespace sc {
     std::vector<std::string>            split               (const std::string& str,
                                                              const std::regex& sep);
 
+    template<typename It>
+    std::string                         join                (It beg, It end, const std::string& join)
+    {
+        std::string result;
+        for (auto i = beg; i != end; ++i) {
+            if (i != beg) {
+                result += join;
+            }
+            result += *i;
+        }
+        return result;
+    }
+
     std::string                         join                (const std::vector<std::string>& components,
                                                              const std::string& join);
-    
+
     std::string                         trim                (const std::string& str,
                                                              const std::string& del = " ");