fix: Fix compliance level support for old code

[andre15silva]

This PR fixes #4067

Added a test case similar to the problem encountered with the example from astor.

[SirYwell]

In regards of #4072, I've run the CtGenerationTest with your changes too, and it takes around 8-10s more time than with the master branch (on my machine).

It would be probably better to keep the static keyword set but remove the version specific ones and add checks for them in the isKeyword method directly.

[andre15silva]

In regards of #4072, I've run the CtGenerationTest with your changes too, and it takes around 8-10s more time than with the master branch (on my machine).

It would be probably better to keep the static keyword set but remove the version specific ones and add checks for them in the isKeyword method directly.

Hi @SirYwell

You're absolutely right. Thank you and sorry for the regression.

I've updated the PR, it should be fixed now.

[monperrus]

Nice fix, very helpful to analyze old Java code, which is definitely in our scope.

Will merge once CI is green.

Thanks @andre15silva

[andre15silva]

Green @monperrus