Todalu

Todalu (Kannada for Lisp), is my attempt to write an interpreter for a lisp like language.

Build

git clone https://github.com/sooriravindra/Todalu.git
mkdir Todalu/build; cd Todalu/build
cmake ..
cmake --build .

Install and run

./todalu # Interactive
./todalu ../testscripts/hello-world.tdl

#Alternatively, copy todalu to $PATH

sudo ln -s /usr/bin/todalu $(readlink -f todalu) # Step 1:  setup todalu
todalu # To run an interactive session
../testscripts/hello-world.tdl # To run a script (Check shebang if it doesn't work)

Sample interaction

$ ./todalu
todalu> (+ 20 22)
=> 42
todalu> (- (* 50 2) (/ 40 2) 30)
=> 50
todalu> (def myvar (+ 1 2 3))
=> 6
todalu> (def is-odd (lambda x (eq? (% x 2) 1)))
=> <lambda=94877095594064>
todalu>
todalu> (if (is-odd myvar) (println "That's odd") (println "All good"))
All good
=> "All good"
todalu> (range 1 6)
=> ( 1 2 3 4 5 )
todalu> (filter is-odd (range 1 11))
=> ( 1 3 5 7 9 )
todalu>
=> (progn (print "Enter a number: ") (+ 4 (read)))
Enter a number: 10
=> 14

Built-ins and support

keyword	intepret	compile
+	yes	yes
-	yes	yes
*	yes	yes
/	yes	yes
eq?	yes	yes
list?	yes	yes
int?	yes	yes
bool?	yes	yes
dec?	yes	yes
string?	yes	yes
>	yes	yes
progn	yes	yes
print	yes	partial
println	yes	partial
quote	yes	yes
eval	yes	no
exit	yes	yes
readstr	yes	no
read	yes	no
car	yes	yes
cdr	yes	yes
cons	yes	yes
lambda	yes	yes
def	yes	yes
if	yes	yes