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[ffigen] Update mentions of isInstance and castFrom #2853

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Merged
liamappelbe merged 1 commit into from
Dec 9, 2025
Merged

[ffigen] Update mentions of isInstance and castFrom #2853

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4 changes: 2 additions & 2 deletions pkgs/ffigen/doc/objc_runtime_types.md
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Original file line number Diff line number Diff line change
Expand Up @@ -31,10 +31,10 @@ completely irrelevant when doing Objective-C interop.
Dart's `is` keyword checks the Dart runtime type. You shouldn't use
this on Objective-C objects, because the Dart runtime type is irrelevant, and
often won't match the Objective-C runtime type. Instead of `x is Foo`,
use `Foo.isInstance(x)`.
use `Foo.isA(x)`.

Dart's `as` keyword changes the static type of an object (and also
checks its runtime type). You shouldn't use this on Objective-C objects,
because the runtime type check may fail since the Dart runtime
type often won't match the Objective-C runtime type. Instead of `x as Foo`,
use `Foo.castFrom(x)`.
use `Foo.as(x)`.
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