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Loïc Joly 2024-12-19 16:45:31 +01:00
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rules/S7172/cfamily/rule.adoc
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This rule raises an issue when `std::optional`, `boost::optional`, or `std::expected` wrap a basic type, and a conversion from the wrapper type to `bool` is used to test the presence of a contained value.
== Why is this an issue? == Why is this an issue?
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When the contained type is also convertible to `bool`, using this concise syntax can be confusing. What is tested: The wrapper, or the contained value? When the contained type is also convertible to `bool`, using this concise syntax can be confusing. What is tested: The wrapper, or the contained value?
This rule raises an issue when `std::optional`, `boost::optional`, or `std::expected` wrap a basic type, and the conversion to `bool` is used to test presence of the value. This rule raises an issue when `std::optional`, `boost::optional`, or `std::expected` wrap a basic type, and the conversion to `bool` is used to test the presence of the value.
=== What is the potential impact? === What is the potential impact?