Keyword Analysis & Research: clazy connect 3arg lambda


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Frequently Asked Questions

Why does connect() crash when taking a Lambda?

This usually results in a crash as the lambda might get called after the captured variable went out of scope. Warns when using the 3 argument connect () that takes a lambda. The recommendation is to use the overload with 4 arguments, taking a context object to control the connection’s lifetime.

What is the recommended number of arguments for a Lambda overload?

Warns when using the 3 argument connect () that takes a lambda. The recommendation is to use the overload with 4 arguments, taking a context object to control the connection’s lifetime. It’s very common to use lambdas to connect signals to slots with different number of arguments:

Is it possible to use Clazy connect statements in C++?

The above doesn’t make sense, as connect statements should reference at least 1 signal. However, it compiles just fine, since it’s valid C++. With clazy your compiler will get Qt semantics and complain about this mistake. Warns when a lambda inside a connect () captures local variables by reference.

What happens if I remove connect call to deletelater in lambda function?

However, if I remove the connect call to deleteLater (below the lambda function), but enable the deleteLater call in the lambda function, the function fails. It prints once and shortly after, crashes in trying to delete the timer object.


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