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exceptionsand const

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Bjarne Stroustrup
2017-05-17 14:25:13 -04:00
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CppCoreGuidelines.md
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@@ -14139,10 +14139,16 @@ To prevent slicing.
// ... // ...
} }
Instead, use: Instead, use a reference:
catch (exception& e) { /* ... */ } catch (exception& e) { /* ... */ }
of - typically better stil - a `const` reference:
catch (const exception& e) { /* ... */ }
Most handlers do not modify their exception and in general we [recommend use of `const`](#Res-const).
##### Enforcement ##### Enforcement
Flag by-value exceptions if their types are part of a hierarchy (could require whole-program analysis to be perfect). Flag by-value exceptions if their types are part of a hierarchy (could require whole-program analysis to be perfect).