Allow specifying certain types we shouldn't derive/impl Debug for

[fitzgen]

Add --no-debug <regex> and Builder::no_debug(String) to supply regexes for matching against types that we should not derive or implement Debug for.

Adding this feature involves:

• Adding a new RegexSet member to bindgen::Builder (similar to the whitelisted_types set).

• A Builder method to add strings to that RegexSet.

• Plumbing in src/options.rs to convert --no-debug <regex> CLI flags into invocations of the builder method.

• Making the MonotoneFramework::constrain function in src/ir/analysis/derive_debug.rs check if the given item is explicitly marked not to be Debug, and if so, inserting it into the self.cannot_derive_debug set via return self.insert(id).

• Skipping any item explicitly marked not to be Debug in src/codegen/derive_debug.rs so that we don't generate an impl Debug for ... for these types when --impl-debug is passed.

• Tests!

  • When --impl-debug is also supplied

  • When --impl-debug is not also supplied

  • When the no-debug type is transitively referenced by a whitelisted item

  • When the no-debug type is explicitly whitelisted

  • When the no-debug type is marked opaque

[fitzgen]

cc @jdm

[njayinthehouse]

Hey! I'd like to give this one a shot.

[pepyakin]

@njayinthehouse
Hi!
Feel free to ask if you run into any questions!

[ivanovaleksey]

Hello, there seems no activity on this issue, I would like to give a try.
@highfive: assign me

[highfive]

Hey @ivanovaleksey! Thanks for your interest in working on this issue. It's now assigned to you!

[pepyakin]

@ivanovaleksey hi! dont hestiate to ask questions, i will glad to answer!