search_is_none

[link2xt]

What it does

There is already a search_is_some lint.

My suggestion is to add a lint for find(...).is_none(), suggesting to replace with !contains(...). Basically the same as search_is_some, but with negation.

Categories (optional)

• Kind: clippy::complexity (same as search_is_some)

What is the advantage of the recommended code over the original code

Example

text.find("error").is_none()

Could be written as:

!text.contains("error")

[mgacek8]

@rustbot claim