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README: syntax highlighting #4

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4 changes: 4 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,7 @@ re-creation fun and a list of options. Stream creation function
is called with the last element, obtained from a stream or `nil`
and must return a new stream:

```elixir
gen_stream_f = fn
# will fail after 10 elements
nil -> Stream.iterate(1, fn x when x < 10 -> x + 1 end)
Expand All @@ -35,6 +36,7 @@ and must return a new stream:
|> Enum.into([])

assert Enum.into(1..n, []) == res
```

## A Practical Example

Expand All @@ -50,6 +52,7 @@ be conducted within a transaction. An additional `wrapper_fun`
parameter allows us to comply. The wrapper fun is allowed to
pass additional metadata to the stream creation function.

```elixir
gen_stream = fn last_val, %{conn: conn} ->
[from, _, _] = last_val || [0, 0, 0]
Postgrex.stream(conn, "SELECT a, b, c FROM recoverable_stream_test WHERE a > $1 ORDER BY a", [from])
Expand All @@ -63,3 +66,4 @@ pass additional metadata to the stream creation function.
RecoverableStream.run(gen_stream, wrapper_fun: wrapper_fun)
|> Stream.each(&IO.inspect/1)
|> Stream.run
```