Wisp: Small-but-featureful embeddable Lisp interpreter written in Haskell

Post by _mpu » Sun, Nov 03, 2013, 11:15 PM UTC

pygy_ wrote: post #6

sillysaurus2 wrote: post #2

I pine for a Lisp with the embeddable ease of Lua.

It could be trivially implemented in Lua as a pre-processor. Lua has lambdas, higher level functions, lexical scope and tail call elimination. The main problem is that it doesn't have a ternary operator, making conditional expression problematic to represent (you have to wrap an if statement in a lambda called on the fly). For something more fully featured, see [0], it is written in MoonScript (which itself compiles…

Post by pygy_ » Sun, Nov 03, 2013, 11:35 PM UTC

_mpu wrote: post #12

pygy_ wrote: post #6

Earlier quoted context omitted.

It could be trivially implemented in Lua as a pre-processor. Lua has lambdas, higher level functions, lexical scope and tail call elimination. The main problem is that it doesn't have a ternary operator, making conditional expression problematic to represent (you have to wrap an if statement in a lambda called on the fly). For something more fully featured, see [0], it is written in MoonScript (which itself compiles…

Wrapping an if in a lambda is unlikely to work as expected.

    ((if foo + -) 4 6)

    (function()
        if foo then return plus
        else return minus
        end
    end)()(4, 6)

Post by akkartik » Mon, Nov 04, 2013, 1:40 AM UTC

espringe wrote: post #10

dangoor wrote: post #4

Not to be confused with Wisp: Homoiconic JS with clojure syntax, s-expressions and macros: https://github.com/Gozala/wisp

Or my: https://github.com/espringe/wisp (Whitespace lISP) with f-expressions!

Post by majika » Mon, Nov 04, 2013, 2:16 AM UTC

cowward wrote: post #15

Does anyone have any good, language agnostic resources for writing interpreters (not just for lisp)?

Post by chalst » Mon, Nov 04, 2013, 7:21 AM UTC

sillysaurus2 wrote: post #2

I pine for a Lisp with the embeddable ease of Lua.