stepA_mal.mal

;; Testing basic Lua interop

;;; lua-eval adds the string "return " to the beginning of the evaluated string
;;; and supplies that to Lua's loadstring().  If complex programs are needed,
;;; those can be wrapped by an anonymous function which is called immediately
;;; (see the foo = 8 example below).

(lua-eval "7")
;=>7

(lua-eval "'7'")
;=>"7"

(lua-eval "123 == 123")
;=>true

(lua-eval "123 == 456")
;=>false

(lua-eval "{7,8,9}")
;=>(7 8 9)

(lua-eval "{abc = 789}")
;=>{"abc" 789}

(lua-eval "print('hello')")
; hello
;=>nil

(lua-eval "(function() foo = 8 end)()")
(lua-eval "foo")
;=>8

(lua-eval "string.gsub('This sentence has five words', '%w+', function(w) return '*'..#w..'*' end)")
;=>"*4* *8* *3* *4* *5*"

(lua-eval "table.concat({3, 'a', 45, 'b'}, '|')")
;=>"3|a|45|b"