C++26: Structured Bindings in Conditions

jjandeboevrie about 12 hours ago 3 commentsRead Article on sandordargo.com

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Discussion (3 Comments)Read Original on HackerNews

Panzerschrek•about 8 hours ago

> if (const auto& [is_successful, error_message] = foo(n))

I don't like it. It's hard to reason what exactly serves as condition variable.

daemin•about 8 hours ago

Should probably make it explicit in this case, something like: if (const auto& [is_successful, error_message] = foo(n); is_successful)

In a more normal scenario you'd expect to use std::expected here rather than a custom struct with an operator bool.

addaon•about 8 hours ago

The return value of foo(n), converted to bool, acts as the condition variable…