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Author Archives: Sérgio Martins

24.01.2018 19 comments

Nailing 13 signal and slot mistakes with clazy 1.3 Create better Qt code by automatically uncovering easy-to-miss errors

Today I want to share 13 mistakes regarding signals, slots and connect statements and how to find them at compile time with clazy, our open-source static-analyzer for Qt. Clazy is a compiler plugin which generates warnings related to Qt. You can read more about it in our previous blog posts: How to use static analysis […]

24.07.2017 6 comments

clazy 1.2 released presenting 5 new Qt compile-time checks

In the previous episode we presented how to uncover 32 Qt best practices at compile time with clazy. Today it’s time to show 5 more and other new goodies present in the freshly released clazy v1.2. New checks 1. connect-not-normalized Warns when the content of SIGNAL(), SLOT(), Q_ARG() and Q_RETURN_ARG() is not normalized. Using normalized […]

18.04.2017 25 comments

Uncovering 32 Qt best practices at compile time with clazy Generating compile-time warnings and automatic refactoring for Qt best practices

In a previous blog post we introduced clazy, a clang plugin which makes the compiler understand Qt semantics, allowing you to get compile-time warnings about Qt best practices ranging from unneeded memory allocations to misuse of API, including fix-its for automatic refactoring. Today we’ll do a round-up and present the checks related to connect statements, […]

07.09.2015 31 comments

How to use static analysis to improve performance

It’s usually said “only improve performance where a profiler tells you to“. I don’t completely agree. Take a big C++ library like Qt: can you profile all classes and all code paths ? It would take a couple of years to accomplish and analyse the results. It’s expensive: It usually only happens if the speed-up […]