update readme

README.md

@@ -1,16 +1,19 @@
 # Inja
 
-A Template Engine for Modern C++
-
 [![Build Status](https://travis-ci.org/pantor/inja.svg?branch=master)](https://travis-ci.org/pantor/inja)
 [![Coverage Status](https://img.shields.io/coveralls/pantor/inja.svg)](https://coveralls.io/r/pantor/inja)
+[![Codacy Status](https://api.codacy.com/project/badge/Grade/aa2041f1e6e648ae83945d29cfa0da17)](https://www.codacy.com/app/pantor/inja?utm_source=github.com&utm_medium=referral&utm_content=pantor/inja&utm_campaign=Badge_Grade)
 [![Github Issues](https://img.shields.io/github/issues/pantor/inja.svg)](http://github.com/pantor/inja/issues)
 [![GitHub License](https://img.shields.io/badge/license-MIT-blue.svg)](https://raw.githubusercontent.com/pantor/inja/master/LICENSE)
 
+
+## Design
+
 ```c++
-json data = {{"name", "world"}};
-string result = inja::render("Hello {{ world }}!", data);
-// "Hello World!"
+json data;
+data["name"] = "world";
+
+inja::render("Hello {{ name }}!", data); // "Hello World!"
 ```
 
 ## Integration
@@ -23,9 +26,82 @@ Inja is headers only. Just one dependency: json by nlohmann.
 ```
     
 
-## Examples
+## Tutorial
 
 
+### Template Rendering
+```c++
+json data;
+data["name"] = "world";
+
+inja::render("Hello {{ name }}!", data); // "Hello World!"
+
+// For more advanced usage, an environment is recommended
+inja::Environment env = inja::Environment();
+
+// Render a string with json data
+std::string result = env.render("Hello {{ name }}!", data);
+
+// Or directly read a template file
+std::string result_template = env.render_temlate("template.txt", data);
+
+// And read a json file for data
+std::string result_template_2 = env.render_temlate_with_json_file("template.txt", "data.json");
+```
+
+The environment class can be configured.
+```c++
+// With default settings
+inja::Environment env_default = inja::Environment();
+
+// With global path to template files
+inja::Environment env_default = inja::Environment("../path/templates/"); 
+```
+
+### Variables
+
+Variables can be rendered with the `{{ ... }}` syntax.
+
+
+### Statements
+
+Statements can be written with the `(% ... %)` syntax. The most important statements are loops, conditions and file includes.All statements can be nested.
+
+#### Loops
+
+```c++
+json data;
+data["guests"] = { "Jeff", "Pierre", "Tom" };
+
+render("""Guests:
+(% for guest in guests %)- {{ guest }}
+(% endfor %)""", data);
+/* Guests:
+- Jeff
+- Pierre
+- Tom
+*/
+```
+
+In the loop, some special variables are available:
+- int index
+- bool is_first
+- bool is_last
+
+#### Conditions
+
+#### Includes
+
+Include other files like `(% include "footer.html" %)`. Relative from file.
+
+### Comments
+
+Comments can be rendered with the `{# ... #}` syntax.
+
+```c++
+inja::render("Hello{# Todo #}!", data); // "Hello!"
+```
+
 ## Supported compilers
 
 Currently, the following compilers are tested:
@@ -33,6 +109,7 @@ Currently, the following compilers are tested:
 - GCC 4.9 - 7.1 (and possibly later)
 - Clang 3.6 - 3.7 (and possibly later)
 
+
 ## License
 
-The class is licensed under the [MIT License](https://raw.githubusercontent.com/pantor/inja/master/LICENSE).
+The class is licensed under the [MIT License](https://raw.githubusercontent.com/pantor/inja/master/LICENSE).

src/inja.hpp

@@ -204,6 +204,7 @@ public:
 				const std::regex regex_condition_close("endif");
 				
 				std::smatch inner_statement_match;
+				// Loop
 				if (std::regex_match(statement_match.inner, inner_statement_match, regex_loop_open)) {
 					SearchClosedMatch loop_match = search_close(input, regex_statement, regex_loop_open, regex_loop_close, statement_match);
 					
@@ -211,11 +212,13 @@ public:
 					string loop_command = inner_statement_match[0].str();
 					result.push_back({{"type", "loop"}, {"command", loop_command}, {"inner", loop_match.inner}});
 				}
+				// Include
 				else if (std::regex_match(statement_match.inner, inner_statement_match, regex_include)) {
 					string include_command = inner_statement_match[0].str();
 					string filename = inner_statement_match[1].str();
 					result.push_back({{"type", "include"}, {"filename", filename}});
 				}
+				// Condition
 				else if (std::regex_match(statement_match.inner, inner_statement_match, regex_condition_open)) {
 					string if_command = inner_statement_match[0].str();
 					json condition_result = {{"type", "condition"}, {"children", json::array()}};
@@ -413,16 +416,17 @@ public:
 		}
 		return result;
 	} 
-	
-	string render(string input, json data) {
-		return render(input, data, "./");
-	}
 		
 	string render(string input, json data, string path) {
 		json parsed = parse(input);
 		return render_tree(parsed, data, path);
 	}
 	
+	
+	string render(string input, json data) {
+		return render(input, data, "./");
+	}
+	
 	string render_template(string filename, json data) {
 		string text = load_file(filename);
 		string path = filename.substr(0, filename.find_last_of("/\\") + 1); // Include / itself