new rule - ban nested if expressions

[DetachHead]

i keep stumbling across code where, for whatever reason, the person writing it thought it was a good idea to have several nested conditions in an if expression, which looks absolutely awful:

foo = (
    "a"
    if bool()
    else str(
        "b"
        if bool()
        else (
            "c"
            if bool()
            else str(
                "d"
                if bool()
                else "e"
            )
        )
    )
)

it would be nice if ruff had a rule to enforce that if expressions do not have any nested if expressions inside them, and instead suggests writing it as a regular if statement which is far easier to read

[lsouder-ozone3d]

It's possible you just want some combination of:

• too-many-nested-blocks (PLR1702)
• complex-structure (C901)

[DetachHead]

hmm, it looks like neither of those rules report on if expressions no matter how nested i make it