diff options
Diffstat (limited to 'absl/functional/function_ref.h')
| -rw-r--r-- | absl/functional/function_ref.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/absl/functional/function_ref.h b/absl/functional/function_ref.h index 6e03ac2e..f9779607 100644 --- a/absl/functional/function_ref.h +++ b/absl/functional/function_ref.h @@ -50,6 +50,7 @@ #include <functional> #include <type_traits> +#include "absl/base/attributes.h" #include "absl/functional/internal/function_ref.h" #include "absl/meta/type_traits.h" @@ -68,7 +69,8 @@ class FunctionRef; // An `absl::FunctionRef` is a lightweight wrapper to any invokable object with // a compatible signature. Generally, an `absl::FunctionRef` should only be used // as an argument type and should be preferred as an argument over a const -// reference to a `std::function`. +// reference to a `std::function`. `absl::FunctionRef` itself does not allocate, +// although the wrapped invokable may. // // Example: // @@ -98,7 +100,8 @@ class FunctionRef<R(Args...)> { public: // Constructs a FunctionRef from any invokable type. template <typename F, typename = EnableIfCompatible<const F&>> - FunctionRef(const F& f) // NOLINT(runtime/explicit) + // NOLINTNEXTLINE(runtime/explicit) + FunctionRef(const F& f ABSL_ATTRIBUTE_LIFETIME_BOUND) : invoker_(&absl::functional_internal::InvokeObject<F, R, Args...>) { absl::functional_internal::AssertNonNull(f); ptr_.obj = &f; @@ -122,6 +125,7 @@ class FunctionRef<R(Args...)> { // To help prevent subtle lifetime bugs, FunctionRef is not assignable. // Typically, it should only be used as an argument type. FunctionRef& operator=(const FunctionRef& rhs) = delete; + FunctionRef(const FunctionRef& rhs) = default; // Call the underlying object. R operator()(Args... args) const { |