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Arc is a programming language created in 2001 by Paul Graham and Robert Morris.

#455on PLDB 23Years Old 236Repos

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Arc is a dialect of the Lisp programming language developed by Paul Graham and Robert Morris.. Read more on Wikipedia...

Example from hello-world:
(prn "Hello World")
Example from Wikipedia:
(defop said req (aform [onlink "click here" (pr "you said: " (arg _ "foo"))] (input "foo") (submit)))

Language features

Feature Supported Token Example
Strings "
"Hello world"
; We know enough now to start writing macros.  Macros are basically
; functions that generate code.  Of course, generating code is easy;
; just call list.
; arc> (list '+ 1 2)
; (+ 1 2)
; What macros offer is a way of getting code generated this way into
; your programs.  Here's a (rather stupid) macro definition:
; arc> (mac foo ()
;        (list '+ 1 2))
; *** redefining foo
; #3(tagged mac #)
; Notice that a macro definition looks exactly like a function
; definition, but with def replaced by mac.
; What this macro says is that whenever the expression (foo) occurs
; in your code, it shouldn't be evaluated in the normal way like a
; function call.  Instead it should be replaced by the result of
; evaluating the body of the macro definition, (list '+ 1 2).
; This is called the "expansion" of the macro call.
Print() Debugging prn

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