# `ExGram.Router.Compiler`
[🔗](https://github.com/rockneurotiko/ex_gram_router/blob/v0.1.0/lib/ex_gram/router/compiler.ex#L1)

`@before_compile` hook that generates the `handle/2` function from the
routing tree built by the DSL macros.

This module is used internally by `ExGram.Router` and should not be
referenced directly.

## What gets generated

Given this router definition:

    use ExGram.Router

    scope do
      filter :command, :start
      handle &MyBot.start/1
    end

    scope do
      handle &MyBot.fallback/1
    end

The compiler generates:

    def handle(update_info, context) do
      ExGram.Router.Dispatcher.dispatch(update_info, context, __exgram_routing_tree__())
    end

    def __exgram_routing_tree__ do
      [
        %ExGram.Router.Scope{
          filters: [{ExGram.Router.Filters.Command, :start}],
          children: [],
          handler: {MyBot, :start, 1}
        },
        %ExGram.Router.Scope{
          filters: [],
          children: [],
          handler: {MyBot, :fallback, 1}
        }
      ]
    end

---

*Consult [api-reference.md](api-reference.md) for complete listing*