Enhancements

Add support for adding proxy provider to custom group in Clash configurations.
Add and, or, bool as template function.
Add support for any amount of argument for template function join.
inja: Add variadic function callback support.

include/inja.hpp

@@ -1813,6 +1813,8 @@ struct Bytecode {
 
 
 
+#define INJA_VARARGS (unsigned int) (~0) // use special number for VARARGS functions
+
 namespace inja {
 
 using json = nlohmann::json;
@@ -1873,10 +1875,16 @@ class FunctionStorage {
     if (it == m_map.end()) {
       return nullptr;
     }
+
+    const FunctionData* var_func = nullptr;
     for (auto &&i: it->second) {
-      if (i.num_args == num_args) return &i;
+      if (i.num_args == num_args) {
+        return &i; // function with precise number of argument(s) should always be used first
+      } else if (i.num_args == INJA_VARARGS) {
+        var_func = &i; // store the VARARGS function for later use
+      }
     }
-    return nullptr;
+    return var_func;
   }
 
   std::map<std::string, std::vector<FunctionData>> m_map;
@@ -2218,6 +2226,7 @@ class Lexer {
     if (std::isalpha(ch)) {
       return scan_id();
     }
+
     switch (ch) {
       case ',':
         return make_token(Token::Kind::Comma);
@@ -3221,7 +3230,7 @@ class Renderer {
         }
         case Bytecode::Op::Push: {
           try{m_stack.emplace_back(*get_imm(bc));}
-          catch(std::exception &e){m_stack.emplace_back(json());}
+          catch(std::exception&){m_stack.emplace_back(json());}
           //m_stack.emplace_back(*get_imm(bc));
           break;
         }
@@ -3418,8 +3427,9 @@ class Renderer {
           bool result = false;
           try
           {
-            const std::string pointer = "/" + [](std::string str){std::string new_value = "/", old_value = ".";for(std::string::size_type pos(0); pos != std::string::npos; pos += new_value.length()){if((pos = str.find(old_value, pos)) != std::string::npos)str.replace(pos, old_value.length(), new_value);else break;}return str;}(name);
-            data.at(json::json_pointer(pointer));
+            std::string ptr;
+            convert_dot_to_json_pointer(name, ptr);
+            data.at(json::json_pointer(ptr));
             result = true;
           }
           catch (json::out_of_range &e)