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[ty] Treat lambda functions as instances of types.FunctionType (#18431)

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lipefree 2025-06-02 17:46:26 +02:00 • committed by GitHub
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crates/ty_python_semantic/src/types/infer.rs
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@ -4956,7 +4956,7 @@ impl<'db> TypeInferenceBuilder<'db> {
// TODO: Useful inference of a lambda's return type will require a different approach,
// which does the inference of the body expression based on arguments at each call site,
// rather than eagerly computing a return type without knowing the argument types.
CallableType::single(self.db(), Signature::new(parameters, Some(Type::unknown())))
CallableType::function_like(self.db(), Signature::new(parameters, Some(Type::unknown())))
}
/// Returns the type of the first parameter if the given scope is function-like (i.e. function or lambda).