This is an example calculator written in ANTLR and ASDL using C++.

Build with CMake:

$ mkdir build && cd build
$ cmake ..
$ make -j8

Run the resulting binary:

$ ./calculantlr
>>> 1+3*5
16
>>> (1+3)*5
20

The ANTLR and ASDL components are pre-included in thirdparty/, so there is nothing to download. Also, the resulting binary is statically linked, so it can be copied anywhere without further dependencies.

All of the work is in src/. The calculator simply parses the user's input into an abstract syntax tree (AST) and then evaluates to compute the result. See the source files for a more thorough explanation.