⚡ Improvements

• With this release, inja switched to C++17 and makes extensive use of string_view without providing a polyfill for older compilers.
• Added an include callback to make finding templates via include more flexible.
• Added options to Meson build system, e.g. for disabling building tests (#216, thanks to @bbastin and @tristan957).
• Added a check in the template parsing for too few arguments.

🐛 Bug Fixes

• Fixed parsing of expression enclosed by paranthesis (#247, thanks to @kubo).
• Fixed integer overflow by using the underlying json data types.
• Fixed the parsing of numbers with whitespaces in between (#219).
• Fixed searching for included templates in the input directory (thanks to @davidchall).
• Fixed warnings in MSVC 2019 (#230, thanks to @stanmihai4).

⚡ Improvements

• Added template inheritance features like extends and blocks.
• Added short circuit evaluation for logical expressions.
• Added join function (#204).

🐛 Bug Fixes

• Fixed the round function with precision 0 (#207).
• Fixed a bug when compiling with INJA_NOEXCEPTION.

🔨 Further Changes

• Added instructions for conda-forge (#187).
• Fixed several compiler warnings (e.g. #197).

🐛 Bug Fixes

• Do not install nlohmann json if an external version is used (#177, thanks @matusnovak).
• Fixed issues with variable names starting with $ or @ (#185).

⚡ Improvements

• Added the INJA_NOEXCEPTION macro that disables throwing exceptions throughout inja (#181).

🔨 Further Changes

• Improve Readme examples and vectorize logo.
• Fixed compiler warnings for unused size variable (#183).

First and foremost, this update improves the performance of template rendering, in particular of loops and variable printing.

⚡ Improvements

• Added assignment statements to set a variable within a template.
• Added whitespace control for expressions (#162, thanks to @tindy2013).
• Added void callbacks without return values, e.g. for debugging purposes.

🐛 Bug Fixes

• Fixed an issue of parsing nested functions (#159, thanks to @DeiRex75).
• Fixed use of parenthesis in combination with logic operators (#155, thanks to @DeiRex75).
• Fixed an issue with loop data in the render_to function (#165, thanks to @fishjump)

🔨 Further Changes

• Integrated Codacity into CI and fixed several static analyzer issues.
• Fixed several compiler warnings (#169, thanks to @tindy2013).

Time for a new major version of inja! 🎉

⚡️ Improvements

• A new core parser and renderer based on an abstract syntax tree (fixing #149), allowing for:
  • Complex expressions of functions, logic expressions and statements.
  • Mathematical functions in templates.
  • Variadic callbacks with unknown number of arguments.
• Show parsing and render error positions in template (#134, thanks to @sabelka).
• Performance improvements, in particular for large json data (#146, thanks to @craigpepper) and large template files.
• Update nlohmann/json to version 3.8.0 (#144, also thanks to @craigpepper).
• Support for GCC 4.8 (#150, thanks to @rafadesu)

🔨 Further Changes

• Move all CI to GitHub Actions.
• Switching from Catch to Doctest as our testing framework with much better build times.

🔥 Breaking Changes

• We've removed the json pointer style for variables in templates.
• We now require nlohmann/json with a minimum version of 3.8.0.

We've got a round of fixes and cool improvements for this release.

⚡️ Improvements

• Add whitespace control (#116, thanks to @jpcima).
• Added new functions: select element at position, string length.
• Throw exception if file cannot be opened (#117, thanks to @thomastrapp).
• Bump to newer nlohmann/json (#107, thanks to @JehandadKhan).

🐛 Bug Fixes

• Fixed scope when including templates (#118, thanks to @thomastrapp).
• Fixed Visual Studio compiler warnings (#119, thanks to @Dodzey).

🔨 Further Changes

• Much improved CI (#124), in particular for Visual Studio (#125, #128, thanks to @kzeslaf).
• Move doxygen generation to GitHub CI.

✨ Further Improvements

There are a couple of great improvements for inja in this release:

• We've added a first API documentation.
• Thanks to @gracicot and @mhhollomon, we improved cmake and meson target exports (#83, #86).
• I've added a string_view polyfill for C++11 to C++14.
• You can now use cget for installing inja (#88). Thanks @pfultz2!
• Warnings in appveyor has been cleaned.

🔥 And a small breaking change in the development pipeline: The CMake option for disabling tests has been renamed from BUILD_TEST to BUILD_TESTING.

This release fixes a memory bug when including templates (#78, #68). Additionally, you can now use render_to without creating an environment and render to general ostreams (#76).

Finally, this is the next major version of Inja. After reworking most of its internals, Inja is now up to two orders of magnitude faster than v1! (#67)

✨Further Improvements

• We've added type checks as builtin functions (#64).
• Loop variables are now supported in inja templates (#52).
• Include in-memory templates (#47).
• Inja is now easier to integrate either with the vcpkg (#45) or conan (#43) package manager.

🔥 Breaking Changes

Inja now requires string_view from C++17.

This is the first stable release of inja! 🎉

Major improvements over the last released version are:

• Added callbacks (#5, #15)
• New functions: min, max, sort, first, last, conversion to string and number (#22)
• Added loops over std::map / json objects
• Fixed lots of errors and warnings (#18)
• Better error messages
• More tests and compilers with CI, additional testing with meson
• Updated dependencies to JSON 3.1 and Catch 2.1