* Do not consider isset checks on static properties as redundant
Unlike normal properties, static properties do not have a prescribed
initialization sequence, so they can always be uninitialized (or unset).
Thus `isset()` checks on them are never redundant.
Fixesvimeo/psalm#5489
* Fix issue with nullable is_static
* ConcatAnalyzer improvements.
Deduplicate code.
Improve type inference.
Allow literal type inference when only one side has multiple types (fixes#5483).
Fix invalid type inference with negative int as right operand.
* Fix inference to be lowercase-string when concatenating int.
* Fix TNonEmptyLowercaseString to not be subtype of TNonFalsyString.
'0' is a non-empty-lowercase-string that is falsy.
* Fix other issues with non-falsy-string.
* Nest ands and ors
Co-authored-by: Matthew Brown <github@muglug.com>
* Do not consider isset checks on static properties as redundant
Unlike normal properties, static properties do not have a prescribed
initialization sequence, so they can always be uninitialized (or unset).
Thus `isset()` checks on them are never redundant.
Fixesvimeo/psalm#5489
* Fix issue with nullable is_static
* Improve @no-named-arguments support and variadics.
Handling of argument unpacking and variadics still needs a pretty big makeover, but this is a good start.
Fixes#5420
Improves #5453 (iterable works, array still causes issues)
* Remove unneeded imports.
* Added event to prevent tainting.
* Remove optional codebase parameter.
* Removed falsy check for codebase.
* Use two separate hooks for adding and removing taints
* Add slashes
* Update add/remove taint test name.
* Cleaned up SafeArrayKeyChecker example plugin.
* Added more AddRemoveTaintsEvent calls to codebase.
* Fix type check error with $added_taints param.
* Added AddRemoveTaintsEvent to remaining classes.
* Fix post-merge error.
* Add comma
* Remove $int_offset that never existed
Co-authored-by: Matt Brown <github@muglug.com>
