Relax std::is_default_constructible_v requirement for C9Co Crubit ABIs#756
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copybara-service[bot] merged 1 commit intomainfrom Mar 30, 2026
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Relax std::is_default_constructible_v requirement for C9Co Crubit ABIs#756copybara-service[bot] merged 1 commit intomainfrom
copybara-service[bot] merged 1 commit intomainfrom
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Currently, `c9::internal::rust::EncodeResultInCrubitBuffer` requires the Crubit ABI type to be default constructible. This breaks for complex ABI types like `rs_std::DynCallable` which requires initialization arguments. This change delegates the ABI instantiation to the caller (either the Rust binding generator or the `CoCrubitAbi` fallback constructor). Because some ABI types are not "structural types" in C++20 and cannot be used as template arguments directly, we pass a closure type (`AbiFactory`) to `StartCoroutineFromRust` that constructs the ABI upon invocation. PiperOrigin-RevId: 891772056
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Relax std::is_default_constructible_v requirement for C9Co Crubit ABIs
Currently,
c9::internal::rust::EncodeResultInCrubitBufferrequires the Crubit ABI type to be default constructible. This breaks for complex ABI types likers_std::DynCallablewhich requires initialization arguments.This change delegates the ABI instantiation to the caller (either the Rust binding generator or the
CoCrubitAbifallback constructor). Because some ABI types are not "structural types" in C++20 and cannot be used as template arguments directly, we pass a closure type (AbiFactory) toStartCoroutineFromRustthat constructs the ABI upon invocation.