Support ignoring lint(s) for a part of the file

[Albert221]

I'd like to propose adding a lint rule ignore for a region of a file. We currently have ignore and ignore_for_file comments supported. What I'm proposing is maybe something like ignore_start and ignore_end. Other languages have a feature like this:

• C# - #pragma warning disable CA2200 and #pragma warning restore CA2200
• JSLint - /*jslint-disable*/ and /*jslint-enable*/
• Possibly other languages

Dart formatter has something similar for selectively disabling formatting for a fragment of file with // dart format off and // dart format on.

[lrhn]

We have // ignore_for_file: ...

Maybe we could have

// ignore_for_now: some_lint, other_lint
...
// ignore_no_more: some_lint

(Names as example only. Not fit for public use. Void where prohibited by law.)

[Albert221]

Exactly! My actual idea (but a first thing coming to my mind really) was:

// ignore_start: some_lint, other_lint
code();
// ignore_end: some_lint

But that could be start/stop, begin/end, etc.

[RohitSaily]

I have definitely been in several situations where I wanted to do this. I am not opposed to any of the previously suggested syntax. Additionally consider something more concise

//ignore: some_lint, other_lint
...
//noignore: some_lint, other_lint

[srawlins]

Great idea. Duplicate of #46549