https://bugs.llvm.org/show_bug.cgi?id=33280
Bug ID: 33280
Summary: Add strict checker for nullability
Product: clang
Version: 4.0
Hardware: Macintosh
OS: MacOS X
Status: NEW
Severity: enhancement
Priority: P
Component: Static Analyzer
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
The _Nonnull and _Nullable annotations seem mainly focused on preventing the
literal "nil" being passed into a method or set for a nonnull property.
However, this is much more relaxed than Swift's null checking. It would be
great if we could statically analyze if what was being passed in as a nonnull
parameter was nonnull itself. It could recognize if a nullable variable was
being used in a way that made it nonnull.
For example:
if (!x) {
return;
}
[self runWithNonnullArg:x];
or
[self runWithNonnullArg:(x ?: @"")];
Both of these would be pass the static analysis.
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