dev_tool example has wrong import

[Saratii]

Bevy version

0.16.0

What you did

Copy paste example from https://github.com/bevyengine/bevy/blob/latest/examples/dev_tools/fps_overlay.rs

What went wrong

Failed to compile because the import is wrong.

• what were you expecting?
  it to compile
• what actually happened?
  error[E0433]: failed to resolve: could not find dev_tools in bevy

[Saratii]

#19201

[greeble-dev]

I don't believe the fps_overlay example is wrong - that style of import is normal for Bevy examples.

What does the bevy dependency in your app's Cargo.toml look like? You might need to enable the bevy_dev_tools feature:

bevy = { version = "0.16", features = ["bevy_dev_tools"] }

I tried copy and pasting the fps_overlay example into a standalone crate - adding the feature seemed to make it work.

[britalmeida]

I had the same issue and enabling the feature fixed it. ✔

Can this information be added to the example?
I just started trying out Bevy by following the Getting Started and then trying to kitbash examples together until I have a window (title, res, vsync), logging, and a defined framerate policy before moving on to input and finally start making my game.
I'm very early on and had no clue about "features".
I think it could be fairly common for complete beginners to start by getting an FPS counter on screen.

[greeble-dev]

I've filed a PR that will help a bit - it will encourage the compiler to say "I couldn't import dev_tools because the app is missing the bevy_dev_tools feature". I don't think this is a complete fix as someone might not know how to enable the feature, but it should be a small step forward.