how can you create <such> a DSL with `+` and `-` o...

# getting-started

[elect]

how can you create such a DSL with + and - operators with implicit receiver?

branchFilter {
                +"refs/heads/my-feature"
            }

[CLOVIS]

The key concepts are:
• extension functions
• operators can be extension functions
• lambdas can be extension functions

Now, all you have to do is create a branchFilter function that takes a parameter that is lambda with a receiver on some class (eg. BranchFilterDSL). Now, all functions declared in BranchFilterDSL (or as extensions of BranchFilterDSL) are available inside the lambda, and not outside of it.

[elect]

yeah, but as far as I know, you can't use the + form unless you have an explicit receiver, ie receiver + "refs"

[elect]

ah, it's the unaryPlus!

[turansky]

Example