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Title: Type inference: Improve base type matching by hvitved · Pull Request #22761 · github/codeql · GitHub

Open Graph Title: Type inference: Improve base type matching by hvitved · Pull Request #22761 · github/codeql

X Title: Type inference: Improve base type matching by hvitved · Pull Request #22761 · github/codeql

Description: Before this PR, type information could only propagate backwards through sub typing when using type constraints (because that is the only form supported in Rust): class Base { init(_ b : B) { } } class Derived : Base<[D]> { } func foo>(_ value1: T1, _ base: T2) { } func bar(_ value1: T1, _ base: Base) { } foo([0], Derived([])) // works: can infer the element type of `[]` to be `Int` bar([0], Derived([])) // doesn't work: cannot infer the element type of `[]` to be `Int` This PR closes that gap, which is needed for proper handling of inherited constructors in Swift. DCA is uneventful for both Rust and Swift.

Open Graph Description: Before this PR, type information could only propagate backwards through sub typing when using type constraints (because that is the only form supported in Rust): class Base<B> { init(_ b : ...

X Description: Before this PR, type information could only propagate backwards through sub typing when using type constraints (because that is the only form supported in Rust): class Base&lt;B&gt; { ini...

Opengraph URL: https://github.com/github/codeql/pull/22761

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72a00e3 Unified: More type inference tests hvitved Oct 6, 2026 https://github.com/github/codeql/pull/22761/commits/72a00e3c26b50f8ca00d97c709b43857e20c4485
70e4424 Unified: Type inference for empty array literals hvitved Oct 7, 2026 https://github.com/github/codeql/pull/22761/commits/70e4424a94c51e7f2c766e88c9a6bb5b630513d9
468caa3 Type inference: Improve base type matching hvitved Oct 6, 2026 https://github.com/github/codeql/pull/22761/commits/468caa3ba37def5992e656b62fa187fc07e61022
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