This is a TinyExpr expression parser with additional files to make it compileable for WASM target using Emscripten. This was made purely out of curiosity within an hour of spare time and absolutely should not be used in a production application
All credit for the original library goes to CodePlea. To read the original README head over to https://github.com/codeplea/tinyexpr
No changes were made to the original library code
Although there are pre-compiled wasm and js files included in the dist folder, you might want to build it yourself. To do this you would need an Emscripten compiler. You can read more about how to get it here https://kripken.github.io/emscripten-site/docs/getting_started/downloads.html
I compiled the library using incoming version of Emscripten on macOS Mojave, but given the tiny nature of the lib I guess anything will do.
After you get the compiler, edit the version in build_wasm.sh if needed and, well, just run it. You should get dist/tinyexpr.js and dist/tinyexpr.wasm generated for you.
The bindings for this library are done using Embind. You can read more about it here https://kripken.github.io/emscripten-site/docs/porting/connecting_cpp_and_javascript/embind.html
Currently only the te_interp function is exposed from the library.
To export other functions you have to edit bindings.cpp appropriately and rebuild the project
Keep in mind that Emscripten doesn't support raw pointers to primitive types so, for example, the error argument is useless in te_interp unless there is a workaround for this.
To see the usage example take a look at the example.js