added context to template engine

.gitignore

@@ -10,3 +10,23 @@ Testing
 Makefile
 bin
 examples/company_report/company_report_stache
+/.vs/boostache
+/x64
+/boostache.VC.db
+*.obj
+Debug_Test/boostache.tlog/boostache.lastbuildstate
+.vs/boostache - Copy/v15/.suo
+.vs/boostache - Copy/v15/Browse.VC.db
+*.ipch
+.vs/ProjectSettings.json
+.vs/slnx.sqlite
+.vs/VSWorkspaceState.json
+*.tlog
+boostache.vcxproj.user
+*.pdb
+*.sln
+*.vcxproj
+*.vcxproj.*
+/*.vcxproj
+/*.filters
+/*.sln

Demo.txt

@@ -0,0 +1,59 @@
+https://mustache.github.io/#demo
+
+
+// Mustache 
+
+<h1>{{header}}</h1>
+{{#bug}}
+{{/bug}}
+
+{{#items}}
+  {{#first}}
+    {{#tag}}
+    {{#items2}}
+      <li><strong>{{name}}</strong></li>
+    {{/items2}}
+    {{/tag}}
+  {{/first}}
+  {{#link}}
+    <li><a href="{{url}}">{{name}}</a></li>
+  {{/link}}
+{{/items}}
+
+{{#empty}}
+  <p>The list is empty.</p>
+{{/empty}}
+
+
+
+// JSON
+
+{
+  "header": "Colors",
+  "name": "outer_color",
+  "items": [
+      {"name": "red", "first": true, "url": "#Red"},
+      {"name": "green", "link": true, "url": "#Green"},
+      {"name": "blue", "link": true, "url": "#Blue"}
+  ],
+  "tag":{
+  "name3":"inner_color",
+  "items2": [
+      {"name2": "red2", "first": true, "url": "#Red"},
+      {"name": "green2", "link": true, "url": "#Green"},
+      {"name": "blue2", "link": true, "url": "#Blue"}
+  ] },
+  "empty": false
+}
+
+
+// Rendered
+
+<h1>Colors</h1>
+<li><strong>red</strong></li>
+<li><strong>green2</strong></li>
+<li><strong>blue2</strong></li>
+<li><a href="#Green">green</a></li>
+<li><a href="#Blue">blue</a></li>
+
+

examples/Jamfile

@@ -14,6 +14,10 @@ project boostache_examples
         <include>.
     ;
 
+exe django
+   : django.cpp
+   ;
+
 exe example1
    : example1.cpp
    ;

examples/django.cpp

@@ -0,0 +1,213 @@
+/**
+*  \file django.cpp
+*
+*  A simple example of how to use boostache.
+*
+*  Copyright 2015 Jeroen Habraken
+*  Copyright 2017, 2018 Tobias Loew : tobi@die-loews.de
+*
+*  Distributed under the Boost Software License, Version 1.0. (See accompanying
+*  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+*/
+#define BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
+
+#include <boost/boostache/boostache.hpp>
+#include <boost/boostache/django.hpp>
+#include <boost/boostache/frontend/django/grammar_def.hpp> // need to work out header only syntax
+#include <boost/boostache/model/helper.hpp>
+#include <iostream>
+#include <sstream>
+
+namespace boostache = boost::boostache;
+
+struct my_node_t;
+using map_t = std::map<std::string, my_node_t>;
+using list_t = std::vector<my_node_t>;
+struct my_node_t : boost::spirit::extended_variant<
+    bool
+    , std::string
+    , map_t
+    , list_t
+>
+{
+    my_node_t() : base_type() {}
+    my_node_t(bool rhs) : base_type(rhs) {}
+    my_node_t(std::string const & rhs) : base_type(rhs) {}
+    my_node_t(char const * rhs) : base_type(std::string{ rhs }) {}
+    my_node_t(map_t const & rhs) : base_type(rhs) {}
+    my_node_t(list_t const & rhs) : base_type(rhs) {}
+};
+
+int django1()
+{
+    // ------------------------------------------------------------------
+    // Describe the input template. We are going to use django format.
+    std::string input(
+        "My name is {{another.name}}. "
+        "{# This is a comment #}"
+        "I am {{pet}} years old."
+        "{%% if dontshowme %%}"
+        "Yep"
+        "{%% else %%}"
+        "Nope"
+        "{%% endif %%}\n");
+    // ------------------------------------------------------------------
+
+    // ------------------------------------------------------------------
+    // The data model definition
+    map_t data = {
+        { "contacts" , map_t{ { "foo","gorp" } } },
+    { "foo"      , "bar" },
+    { "me"       , "Daniel" },
+    { "pet"      , "turtles" },
+    { "lpet"     , "Turtles" },
+    { "people"   , list_t{ map_t{ { "name"    , "Tom" },
+    { "job"     , "sweep floors" } },
+    map_t{ { "name"    , "Sue" },
+    { "job"     , "write code" } }
+    }
+    },
+    { "title"      , "Multiple Mustaches" },
+    { "comment"    , "this shouldn't be here" },
+    { "showme"     , true },
+    { "showme2"    , true },
+    { "dontshowme" , false },
+    { "next_more"  , "I like {{pet}}." },
+    { "another"    , map_t{ { "name"   , "Sam" },
+    { "ok"     , true },
+    { "not_ok" , false } }
+    },
+    };
+    // ------------------------------------------------------------------
+
+    // ------------------------------------------------------------------
+    // Load the template.
+    // This parses the input and compiles the result. The return is the
+    // compiled data structure
+    using boostache::load_template;
+
+    auto iter = input.begin();
+    auto templ = load_template<boostache::format::django>(iter, input.end());
+    // ------------------------------------------------------------------
+
+    // ------------------------------------------------------------------
+    // Apply the compiled template and the data model to generate the result
+    std::stringstream stream;
+    boostache::generate(stream, templ, data);
+    // ------------------------------------------------------------------
+
+    // print the result
+    std::cout << stream.str();
+
+    return 0;
+}
+
+
+extern std::string django2_input;
+
+int django2()
+{
+   // ------------------------------------------------------------------
+   // Describe the input template. We are going to use django format.
+    // input moved to django_input.cpp
+  // std::string input(
+	 //  //"try fifdgrst.sefdshcond.another.name: {{fifdgrst.sefdshcond.another.name}}. \n"
+	 //  //"try another.name: {{another.name}}.\n"
+	 //  //"{%% for contact in people %%}"
+	 //  //"My name is {{fifdgrst.sefdshcond.another.name}}.\n"
+	 //  //"{%% endfor %%}"
+	 //  //"-----------------------\n"
+	 //  //"{%% for contact in people %%}"
+	 //  //"{{contact.job}}\n"
+	 //  ////"now from a nested context: people\n"
+	 //  ////"try fifdgrst.sefdshcond.another.name: {{fifdgrst.sefdshcond.another.name}}. \n"
+	 //  ////"try another.name: {{another.name}}.\n"
+	 //  //"{%% endfor %%}"
+	 //  "{%% for contact in people %%}"
+	 //  //"{%% for more_contact in more_people %%}"
+	 //  "{{contat.name}} does {{contact.job}}\n"
+	 //  //"now from a nested context: people\n"
+	 //  //"try fifdgrst.sefdshcond.another.name: {{fifdgrst.sefdshcond.another.name}}. \n"
+	 //  //"try another.name: {{another.name}}.\n"
+	 //  //"{%% endfor %%}"
+	 //  "{%% endfor %%}"
+
+	 //  //       "{# This is a comment #}"
+  ////       "I am {{pet}} years old."
+		////"{%% for contact in people %%}"
+	 ////  "a contact\n"
+	 ////  "My name is still {{another.name}}. \n\n"
+	 ////  "{%% endfor %%}"
+  ////       "{%% if dontshowme %%}"
+  ////       "Yep"
+  ////       "{%% else %%}"
+  ////       "Nope"
+  ////       "{%% endif %%}\n"
+  // );
+  // // ------------------------------------------------------------------
+
+   // ------------------------------------------------------------------
+   // The data model definition
+   map_t data = {
+      {"contacts" , map_t{{"foo","gorp"}}},
+      {"foo"      , "bar"},
+      {"me"       , "Daniel"},
+      {"pet"      , "turtles"},
+      {"lpet"     , "Turtles"},
+      {"people"   , list_t{ map_t{{"name"    , "Tom"},
+                                  {"job"     , "sweep floors"} },
+                            map_t{{"name"    , "Sue"},
+                                  {"job"     , "write code"} }
+         }
+      },
+      {"title"      , "Multiple Mustaches"},
+      {"comment"    , "this shouldn't be here"},
+      {"showme"     , true},
+      {"showme2"    , true},
+      {"dontshowme" , false},
+      {"next_more"  , "I like {{pet}}."},
+      {"another"    , map_t{{"name"   , "Sam"},
+                            {"ok"     , true },
+                            {"not_ok" , false}}
+      },
+	  { "more_people"   , list_t{ map_t{ { "name"    , map_t{ { "first", "Peter" },{ "last", "Smith"}} },
+	                                    { "job"     , "lazy person" } },
+								   map_t{ { "name"    , map_t{ { "first", "Barbara" },{ "last", "Miller"}} },
+								   { "job"     , "chef" } }
+							   }
+	  },
+   { "nester" ,
+       map_t{ { "nested",
+            list_t{ map_t{ { "name"    , "Tom" },
+                            { "job"     , "sweep floors" } },
+                   map_t{ { "name"    , "Sue" },
+                            { "job"     , "write code" } }
+   } } } },
+   };
+
+
+
+   // ------------------------------------------------------------------
+
+   // ------------------------------------------------------------------
+   // Load the template.
+   // This parses the input and compiles the result. The return is the
+   // compiled data structure
+   using boostache::load_template;
+
+   auto iter = django2_input.begin();
+   auto templ = load_template<boostache::format::django>(iter, django2_input.end());
+   // ------------------------------------------------------------------
+
+   // ------------------------------------------------------------------
+   // Apply the compiled template and the data model to generate the result
+   std::stringstream stream;
+   boostache::generate(stream, templ, data);
+   // ------------------------------------------------------------------
+
+   // print the result
+   std::cout << stream.str();
+
+   return 0;
+}
+