efene programming language

today I added two features that will make learning efene a lot easier.

this features are the interactive shell and command line eval.

interactive shell is what you get in erlang when you type erl, it let you write expressions that are evaluated right away and let you experiment with stuff.

the command line eval is what you get in python when you do

python -c “something”

the “something” is executed in a interpreter for you

let’s see some examples of the command line eval

$ fnc -c 'io.format("hello world!~n")'
hello world!
eval: {value,ok,[]}

the seccond line is the result of the evaluation, let’s try another one

$ fnc -c '4 * 3 + 2'
eval: {value,14,[]}

now let’s see the interactive shell

$ fnc -s
efene 0.3 exit with Ctrl+D
>>> A = 2
2
>>> B = A * 3
6
>>> io.format("~p ~p~n", [A B])
2 6
ok
>>> F = fn (Name) { io.format("hello ~s!~n" [Name] } 
{badmatch,{error,{1,parser,["syntax error before: ","'}'"]}}}
>>> F = fn (Name) { io.format("hello ~s!~n" [Name]) }       
#Fun
>>> F("mariano")
hello mariano!
ok
>>> 

as you can see it behaves like one would expect for an interactive interpreter :D