ligo/gitlab-pages/website/versioned_docs/version-next/language-basics-entrypoints.md
2019-06-11 03:37:12 +02:00

46 lines
1.1 KiB
Markdown

---
id: version-next-language-basics-entrypoints
title: Entrypoints
original_id: language-basics-entrypoints
---
## Defining an entry point
<!--DOCUSAURUS_CODE_TABS-->
<!--Pascaligo-->
```Pascal
function main (const p : int ; const s : int) : (list(operation) * int) is
block {skip} with ((nil : list(operation)), s + 1)
```
<!--END_DOCUSAURUS_CODE_TABS-->
## Multiple entry points
Multiple entrypoints are currently not supported in Michelson, however with Ligo, you can work that around by using variants.
<!--DOCUSAURUS_CODE_TABS-->
<!--Pascaligo-->
```Pascal
// variant defining pseudo multi-entrypoint actions
type action is
| Increment of int
| Decrement of int
function add (const a : int ; const b : int) : int is
block { skip } with a + b
function subtract (const a : int ; const b : int) : int is
block { skip } with a - b
// real entrypoint that re-routes the flow based on the action provided
function main (const p : action ; const s : int) : (list(operation) * int) is
block {skip} with ((nil : list(operation)),
case p of
| Increment n -> add(s, n)
| Decrement n -> subtract(s, n)
end)
```
<!--END_DOCUSAURUS_CODE_TABS-->