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local utils = require('utils')
local types = require('types')
local reader = require('reader')
local printer = require('printer')
local readline = require('readline')
local Nil, List, _pr_str = types.Nil, types.List, printer._pr_str
local M = {}
-- string functions
function pr_str(...)
return table.concat(
utils.map(function(e) return _pr_str(e, true) end, arg), " ")
end
function str(...)
return table.concat(
utils.map(function(e) return _pr_str(e, false) end, arg), "")
end
function prn(...)
print(table.concat(
utils.map(function(e) return _pr_str(e, true) end, arg), " "))
io.flush()
return Nil
end
function println(...)
print(table.concat(
utils.map(function(e) return _pr_str(e, false) end, arg), " "))
io.flush()
return Nil
end
function slurp(file)
local lines = {}
for line in io.lines(file) do
lines[#lines+1] = line
end
return table.concat(lines, "\n") .. "\n"
end
function do_readline(prompt)
local line = readline.readline(prompt)
if line == nil then
return Nil
else
return line
end
end
-- hash map functions
function assoc(hm, ...)
return types._assoc_BANG(types.copy(hm), unpack(arg))
end
function dissoc(hm, ...)
return types._dissoc_BANG(types.copy(hm), unpack(arg))
end
function get(hm, key)
local res = hm[key]
if res == nil then return Nil end
return res
end
function keys(hm)
local res = {}
for k,v in pairs(hm) do
res[#res+1] = k
end
return List:new(res)
end
function vals(hm)
local res = {}
for k,v in pairs(hm) do
res[#res+1] = v
end
return List:new(res)
end
-- sequential functions
function cons(a,lst)
local new_lst = lst:slice(1)
table.insert(new_lst, 1, a)
return List:new(new_lst)
end
function concat(...)
local new_lst = {}
for i = 1, #arg do
for j = 1, #arg[i] do
table.insert(new_lst, arg[i][j])
end
end
return List:new(new_lst)
end
function nth(seq, idx)
if idx+1 <= #seq then
return seq[idx+1]
else
types.throw("nth: index out of range")
end
end
function first(a)
if #a == 0 then
return Nil
else
return a[1]
end
end
function apply(f, ...)
if types._malfunc_Q(f) then
f = f.fn
end
local args = concat(types.slice(arg, 1, #arg-1),
arg[#arg])
return f(unpack(args))
end
function map(f, lst)
if types._malfunc_Q(f) then
f = f.fn
end
return List:new(utils.map(f, lst))
end
-- metadata functions
function meta(obj)
local m = getmetatable(obj)
if m == nil or m.meta == nil then return Nil end
return m.meta
end
function with_meta(obj, meta)
local new_obj = types.copy(obj)
getmetatable(new_obj).meta = meta
return new_obj
end
-- atom functions
function swap_BANG(atm,f,...)
if types._malfunc_Q(f) then
f = f.fn
end
local args = List:new(arg)
table.insert(args, 1, atm.val)
atm.val = f(unpack(args))
return atm.val
end
M.ns = {
['='] = types._equal_Q,
throw = types.throw,
['nil?'] = function(a) return a==Nil end,
['true?'] = function(a) return a==true end,
['false?'] = function(a) return a==false end,
symbol = function(a) return types.Symbol:new(a) end,
['symbol?'] = function(a) return types._symbol_Q(a) end,
keyword = function(a) return "\177"..a end,
['keyword?'] = function(a) return types._keyword_Q(a) end,
['pr-str'] = pr_str,
str = str,
prn = prn,
println = println,
['read-string'] = reader.read_str,
readline = do_readline,
slurp = slurp,
['<'] = function(a,b) return a<b end,
['<='] = function(a,b) return a<=b end,
['>'] = function(a,b) return a>b end,
['>='] = function(a,b) return a>=b end,
['+'] = function(a,b) return a+b end,
['-'] = function(a,b) return a-b end,
['*'] = function(a,b) return a*b end,
['/'] = function(a,b) return math.floor(a/b) end,
-- TODO: get actual milliseconds
['time-ms'] = function() return os.time() * 1000 end,
list = function(...) return List:new(arg) end,
['list?'] = function(a) return types._list_Q(a) end,
vector = function(...) return types.Vector:new(arg) end,
['vector?'] = types._vector_Q,
['hash-map'] = types.hash_map,
['map?'] = types._hash_map_Q,
assoc = assoc,
dissoc = dissoc,
get = get,
['contains?'] = function(a,b) return a[b] ~= nil end,
keys = keys,
vals = vals,
['sequential?'] = types._sequential_Q,
cons = cons,
concat = concat,
nth = nth,
first = first,
rest = function(a) return List:new(a:slice(2)) end,
['empty?'] = function(a) return a==Nil or #a == 0 end,
count = function(a) return #a end,
apply = apply,
map = map,
conj = function(...) return Nil end,
meta = meta,
['with-meta'] = with_meta,
atom = function(a) return types.Atom:new(a) end,
['atom?'] = types._atom_Q,
deref = function(a) return a.val end,
['reset!'] = function(a,b) a.val = b; return b end,
['swap!'] = swap_BANG,
}
return M
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