refactor: add PHP 8.3 types to BC-safe class constants - #63133
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PHP 8.3 allows class constants to declare a type. Adopt it where doing so cannot break third-party apps. Typing an inheritable constant is a hard BC break: a subclass that redeclares it untyped fails to load with "Type of C::FOO must be compatible with P::FOO of type string". Changes are therefore limited to constants that cannot be redeclared by a subclass: - private const (not inherited) - final public/protected const - constants declared in a final class or an enum Interface constants, trait constants, and public/protected constants in non-final (including abstract) classes are left untyped, as is all of lib/public (OCP) and lib/unstable (NCU). One review-requested exception: the public OBJECT_PREFIX/OBJECT_SUFFIX constants of the app-internal CalDAV import helpers (TextImporter, XmlImporter) are typed as well; these classes are not public API and have no subclasses. Only string, int and array are used. float is avoided because it would silently coerce an int literal and change === comparisons. No constant name or value is modified: every changed line adds only the type token, so runtime behaviour is unchanged. Signed-off-by: Git'Fellow <12234510+solracsf@users.noreply.github.com>
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@SebastianKrupinski Under the looser standard ("public const in a class nothing extends"), generalized repo-wide, many other constants would qualify. I deliberately did not apply those. "No subclass in this repo" is not "No subclass", the list literally includes CalDavBackend, a known third-party extension surface. If you want that expansion, let me know. |
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Summary
PHP 8.3 allows class constants to declare a type. Adopt it where doing so cannot break third-party apps.
Checklist
3. to review, feature component)stable32)AI (if applicable)