Mustache implementation for modern C++ (requires C++11)
Header only
Zero dependencies
Templated string type for compatibility with any STL-like string (std::string, std::wstring, etc)
Boost license

Example usage

All examples assume using namespace kainjow::mustache. Additional examples and usage can be found in the tests.cpp file.

Example 1 - Hello World

mustache tmpl{"Hello {{what}}!"};
std::cout << tmpl.render({"what", "World"}) << std::endl;
// Hello World!

Example 2 - Lists

mustache tmpl{"{{#employees}}{{name}}, {{/employees}}"};
data employees{data::type::list};
employees << data{"name", "Steve"} << data{"name", "Bill"};
tmpl.render({"employees", employees}, std::cout);
// Steve, Bill,

Example 3 - Custom Render Handler

mustache tmpl("Hello {{what}}!");
std::stringstream ss;
tmpl.render({"what", "World"}, [&ss](const std::string& str) {
    ss << str;
});
// ss.str() == "Hello World!"

Supported Features

This library supports all current Mustache features:

Variables
HTML escaping
Sections
Inverted Sections
True/False
Lists
Lambdas
Partials
Comments
Set Delimiter

Additional features:

Custom escape function for use outside of HTML

Run Tests

For *nix:

make

For macOS:

make mac

For Visual Studio 2013 (CMake 2.8+ required):

build.bat

For Visual Studio 2015 (CMake 3.1+ required):

build.bat 14

Release Notes

4.1 - April 18, 2020

Fixed incorrect results when using lambda renderers

4.0 - October 28, 2019

Lines with sections that result in an empty line are removed, per the Mustache spec.

3.2.1 - July 22, 2018

Add an overload to render() that accepts a context and a stream (thanks Kitsune Ral)
Added checks for empty objects (thanks Snafuuz)
Refactored parser in preparation for future changes

3.2 - February 24, 2018

Added ability to provide a custom escape function (thanks to Kitsune Ral)
Allow data.set() to override an existing value

3.1 - July 22, 2017

Added a new lambda type (innovatively called lambda2) that takes an additional render function. It will not render its result but allows the user to call the render argument to render the section text, or any other text.

3.0 - July 8, 2017

Performance improvements - about 45% faster than version 2
Even simpler API. Not backwards compatible but upgrading should be straightforward:
- Namespace, classes, and methods are now in snake case to match the STL. For example, Kainjow::Mustache is now kainjow::mustache
- Classes and aliases are now under a mustache namespace, instead of being under the mustache class
- Removed Data::List() - use data{data::type::list} instead
- Removed Data::type() - use the various is_xxx methods to identity the type

2.0 - June 11, 2016

New simpler API (not backwards compatible)
std::wstring support
Bug fixes (thanks to Shen-Ta Hsieh)
Automated tests on OS X
100% test coverage

1.0 - April 19, 2015

All current Mustache features are implemented.