# Sum Types question
**URL:** https://discourse.julialang.org/t/sum-types-question/109576
**Category:** General Usage
**Created:** [February 1, 2024, 3:04pm UTC](https://discourse.julialang.org/t/sum-types-question/109576 "2024-02-01T15:04:19Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Larbino1](https://discourse.julialang.org/u/Larbino1)
#### Post date: [February 1, 2024, 3:04pm UTC](https://discourse.julialang.org/t/sum-types-question/109576/1 "2024-02-01T15:04:19Z")
I am considering using sum types for my package, and I have a question about the interface. Say I have a sum type of fruits, `Apple` `Orange`, and `Pear`. I have 3 methods `consume(::Apple)`, `consume(::Orange)`, `consume(::Pear).`
If I have a
```julia
@sumtype Fruit begin
AppleFruit(::Apple)
OrangFruit(::Orange)
PearFruit(::Pear)
end
```
Can I call consume `consume(::Fruit)` and rely on implicit conversion to convert to an `Apple`, `Orange` or `Pear`, or do I need to write my own `consume(::Fruit)` function with case that dispatches to each method?
---
### Author:  [@Mason](https://discourse.julialang.org/u/Mason)
#### Post date: [February 1, 2024, 3:29pm UTC](https://discourse.julialang.org/t/sum-types-question/109576/2 "2024-02-01T15:29:19Z")
> [@Larbino1](#):
>
> ```julia
> @sumtype Fruit begin
> AppleFruit(::Apple)
> OrangFruit(::Orange)
> PearFruit(::Pear)
> end
>
> ```
I think what you meant to write here was something more like
```julia
@sum_type Fruit begin
Apple # Maybe you want to store some data inside, like Apple(weight::Float64)
Orange
Pear
end
```
you’d then write something like
```julia
consume(f::Fruit) = @cases f begin
Apple => do_something_for_apples() # If Apple stores data this might be Apple(w) => do_something_for_apples(w)
Orange => do_something_for_oranges()
Pear => do_something_for_pears()
end
```