folly::or_unwind_epitaph

Synopsis

Declared in <folly/result/or_unwind_epitaph.h>

template<
    typename T,
    typename... Args>
auto
or_unwind_epitaph(
    result<T> r,
    ext::format_string_and_location<Args...> snl = "",
    Args const&... args);

Description

Syntax sugar for or_unwind(epitaph(...).

On the value path: epitaphs are skipped (just like epitaph). On the error-or-stopped path: epitaphs are added, then the error is propagated.

Return Value

An or_unwind wrapper carrying the annotated result.

Parameters

Name	Description
r	The result whose error path receives the epitaph.
snl	The format string and source location for the epitaph message.
args	The arguments substituted into the epitaph message.