FunctionalLua/functional.lua at main · ixtWuko/FunctionalLua · GitHub

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-- functional by ixtWuko
-- functional programming in Lua

require("extend")

localtinsert=table.insert

localfp= {}

functionfp.Empty()
end

--function fp.Curry(f, num_params)
-- return function(...)
-- local params = table.pack(...)
-- if params.n >= num_params then
-- return f(...)
-- else
-- local fn = function(...)
-- return f(table.unpack(fp.t.Prepend(params, table.pack(...))))
-- end
-- return fp.Curry(fn, num_params - params.n)
-- end
-- end
--end

---@paramffun(...) : any
---@paramnum_paramsinteger
---@returnfun(...) : any
functionfp.Curry(f, num_params)
localcurried= { __f=f, __n=num_params }
curried.__index=curried
curried.__newindex=fp.Empty
curried.__tostring=function(fn) returntostring(fn.__f) end
curried.__call=function(fn, ...)
localparams=table.pack(...)
ifparams.n==0then
returnfn
end

iffn.__pthen
fp.t.Prepend(fn.__p, params)
params.n=params.n+fn.__p.n
end

ifparams.n>=fn.__nthen
returnfn.__f(table.unpack(params))
else
returnfn.__new(params)
end
end
curried.__new=function(params)
localfn= { __p=params }
setmetatable(fn, curried)
returnfn
end
returncurried.__new()
end

functionfp.Compose(...)
localfns=table.pack(...)
returnfunction(...)
localparams=table.pack(...)
fori=fns.n, 1, -1do
params=table.pack(fns[i](table.unpack(params)))
end
returntable.unpack(params)
end
end


localinsert=function(index, value, list)
tinsert(list, index, value)
returnlist
end

localinsertTail=function(value, list)
tinsert(list, value)
returnlist
end

localremove=function(index, list)
returntable.remove(list, index)
end

localremoveTail=function(list)
returntable.remove(list)
end

localprepend=function(source, target)
returntable.prepend(target, source)
end

localappend=function(source, target)
returntable.append(target, source)
end

localfind=function(value, t)
returntable.find(t, value)
end

localfindif=function(condition, t)
returntable.findif(t, condition)
end

localsort=function(comp, list)
table.sort(list, comp)
returnlist
end

localforeach=function(f, t)
returntable.foreach(t, f)
end

localmap=function(f, t)
returntable.map(t, f)
end

localfilter=function(f, t)
returntable.filter(t, f)
end

localreduce=function(f, init, list)
returntable.reduce(list, f, init)
end

localzip=function(f, lhs, rhs)
returntable.zip(lhs, rhs, f)
end

localconcat=function(sep, list)
returntable.concat(list, sep)
end

fp.t= {}

---@typefun(index:integer, value:any, list:table) : table
fp.t.Insert=fp.Curry(insert, 3)

---@typefun(value:any, list:table) : table
fp.t.InsertHead=fp.t.Insert(1)

---@typefun(value:any, list:table) : table
fp.t.InsertTail=fp.Curry(insertTail, 2)

---@typefun(index:integer, list:table) : any
fp.t.Remove=fp.Curry(remove, 2)

---@typefun(list:table) : any
fp.t.RemoveHead=fp.t.Remove(1)

---@typefun(list:table) : any
fp.t.RemoveTail=fp.Curry(removeTail, 1)

---@typefun(source:table, target:table) : table
fp.t.Prepend=fp.Curry(prepend, 2)

---@typefun(source:table, target:table) : table
fp.t.Append=fp.Curry(append, 2)

---@typefun(value:any, t:table)
fp.t.Find=fp.Curry(find, 2)

---@typefun(condition:(fun(key:any, value:any):boolean), t:table)
fp.t.If=fp.Curry(findif, 2)

---@typefun(comp:(fun(a:any, b:any):boolean), list:table) : table
fp.t.Sort=fp.Curry(sort, 2)

---@typefun(f:(fun(v:any):any), t:table)
fp.t.Foreach=fp.Curry(foreach, 2)

---@typefun(f:(fun(v:any):any), t:table) : table
fp.t.Map=fp.Curry(map, 2)

---@typefun(f:(fun(v:any):boolean), t:table) : table
fp.t.Filter=fp.Curry(filter, 2)

---@typefun(f:(fun(a:any, b:any):any), init:any, list:table) : any
fp.t.Reduce=fp.Curry(reduce, 3)

---@typefun(f:(fun(a:any, b:any):any), lhs:table, rhs:table)
fp.t.Zip=fp.Curry(zip, 3)

---@typefun(sep:string, list:table) : string
fp.t.Concat=fp.Curry(concat, 2)


localrep=function(sep, n, s)
returnstring.rep(s, n, sep)
end

localsub=function(i, j, s)
returnstring.sub(s, i, j)
end

localmatch=function(pattern, init, s)
returnstring.match(s, pattern, init)
end

localfind=function(pattern, init, plain, s)
returnstring.find(s, pattern, init, plain)
end

localgmatch=function(pattern, s)
returnstring.gmatch(s, pattern)
end

localgsub=function(pattern, repl, n, s)
returnstring.gsub(s, pattern, repl, n)
end

localsplit=function(delimiter, s)
returnstring.split(s, delimiter)
end

fp.s= {}

---@typefun(sep:string, n:integer, s:string) : string
fp.s.Rep=fp.Curry(rep, 3)

---@typefun(i:integer, j:integer, s:string) : string
fp.s.Sub=fp.Curry(sub, 3)

---@typefun(pattern:string, init:integer, s:string) : any
fp.s.Match=fp.Curry(match, 3)

---@typefun(pattern:string, init:integer, plain:boolean, s:string) : integer, integer, string
fp.s.Find=fp.Curry(find, 4)

---@typefun(pattern:string, s:string) : fun(): string
fp.s.Gmatch=fp.Curry(gmatch, 2)

---@typefun(pattern:string, repl:string, n:integer, s:string) : string, number
fp.s.Gsub=fp.Curry(gsub, 4)

---@typefun(delimiter:string, s:string) : string[]
fp.s.Split=fp.Curry(split, 2)

returnfp