Lexyn is a simple expression analyzer which checks mathematical expression for validity. This is also a part of my High-Performant systems software. Compilers course assignment.
Currently the Lexyn functionality is very limited. Everything Lexyn can is to tokenize the input string and perform a basic syntax analysis. In future it will be able to build a parallel execution plans for given expression and determine the best of them.
$ Lexyn '2 + 2'
$ Lexyn '2++2'
Unexpected token `+` at position 3
2++2
^
$ Lexyn '2@@2'
Unexpected symbol '@' at position 2
2@@2
^
Unexpected symbol '@' at position 3
2@@2
^
$ Lexyn '22 +'
Unexpected end of input at position 4
22 +
^
$ Lexyn '2*22 + () - 1'
Empty parens are not allowed at position 9
2*22 + () - 1
^Haskell stack is used for project development. To build the project just execute stack build in the project directory.