syntax highlighters implementation for super-initializer parameters

[devoncarew]

See #48055 for the main tracking issue.

• https://github.com/dart-lang/dart-syntax-highlight/ (@DanTup)
• https://github.com/highlightjs/highlight.js (@srawlins)
• https://github.com/codemirror/CodeMirror/ (@domesticmouse)

[itsjustkevin]

@devoncarew who is the person to confirm this task is closed out?

[devoncarew]

@DanTup for dart-syntax-highlighting; @srawlins for highlight.js; @domesticmouse for codemirror. I'll add ldaps to the checklist above. Often, there isn't any work for this syntax highlighters for new language features, but we need to check (and do any work that may be required).

[srawlins]

highlight.js seems to work out-of-the-box. super is highlighted exactly as this, as a keyword.

[domesticmouse]

Putting the below sample into DartPad shows CodeMirror treating super.parameter equivalent to this.parameter:

class B {
  final int foo;
  final int bar;
  final int baz;
  B(this.foo, this.bar, [this.baz = 4]);
}
class C extends B {
  C(super.foo, super.bar, [super.baz = 4]);
}

[DanTup]

The same is true for VS Code, super is treated just like this.

Textmate Grammar (from dart-syntax-highlight/):

Semantic Tokens (from the LSP server):