Command line program that acts as a simple calculator: it takes a single argument as an expression and prints out the integer result of evaluating it. Run like this
foo@bar:~$ swift run sexpr-calc 123
123
foo@bar:~$ swift run sexpr-calc "(add 12 12)"
24
foo@bar:~$ swift run sexpr-calc "(multiply 75 4.5)"
375Besides the examples already provided above, it should be possible to mix and match integers and function calls to build arbitrary calculations:
foo@bar:~$ "(add 1 (multiply 2 3))"
7
foo@bar:~$ "(multiply 2 (add (multiply 2 3) 8))"
28
foo@bar:~$ "(multiply 2 (add (subtract 4 3) 8))"
18If you want to run sexpr-calc using SwiftPM, it's as simple as cloning the repository and invoking swift run:
git clone https://github.com/kwakueshun/sexpr-calc.git
cd sexpr-calc
swift run sexpr-calc