# @memoize macro
**URL:** https://discourse.julialang.org/t/memoize-macro/39968
**Category:** General Usage
**Tags:** question, memoize
**Created:** [May 22, 2020, 1:43pm UTC](https://discourse.julialang.org/t/memoize-macro/39968 "2020-05-22T13:43:24Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@A.U.M](https://discourse.julialang.org/u/A.U.M)
#### Post date: [May 22, 2020, 1:43pm UTC](https://discourse.julialang.org/t/memoize-macro/39968/1 "2020-05-22T13:43:24Z")
Hello. I am working on implement macro @memoize. it works well but i want to generalize it and make it more robust (still for functions with a single argument) by checking whether the argument and return types are specified or not If they are not, I want to use the Any type instead of the argument in the Dict that acts as the cache. any help or tips?
```julia
macro memoize(fun::Expr)
local call = fun.args[1]
local name = call.args[1].args[1]
local arg1 = call.args[1].args[2]
local arg1_name = arg1.args[1]
local arg1_type = arg1.args[2]
local return_type = call.args[2]
local body = fun.args[2]
quote
let cache = Dict{$(esc(arg1_type)), $(esc(return_type))}()
global function $(esc(name))($(esc(arg1_name))::$(esc(arg1_type)))::$(esc(return_type))
if haskey(cache, $(esc(arg1_name)))
cache[$(esc(arg1_name))]
else
cache[$(esc(arg1_name))] = $(esc(body))
end
end
end
end
end
```
---
### Author:  [@zgornel](https://discourse.julialang.org/u/zgornel)
#### Post date: [May 24, 2020, 11:55am UTC](https://discourse.julialang.org/t/memoize-macro/39968/2 "2020-05-24T11:55:24Z")
[GitHub - zgornel/Caching.jl: Memoization mechanism](https://github.com/zgornel/Caching.jl) may also be of help.
---
### Author:  [@jishnub](https://discourse.julialang.org/u/jishnub)
#### Post date: [May 24, 2020, 3:07pm UTC](https://discourse.julialang.org/t/memoize-macro/39968/3 "2020-05-24T15:07:52Z")
Is this different from `@memoize` in [Memoize.jl](https://github.com/JuliaCollections/Memoize.jl)?
---
### Author:  [@zgornel](https://discourse.julialang.org/u/zgornel)
#### Post date: [May 26, 2020, 8:01am UTC](https://discourse.julialang.org/t/memoize-macro/39968/4 "2020-05-26T08:01:35Z")
Most probably 😉