[derived.classes]

# 16 Library introduction [[library]](./#library)

## 16.4 Library-wide requirements [[requirements]](requirements#derived.classes)

### 16.4.5 Constraints on programs [[constraints]](constraints#derived.classes)

#### 16.4.5.5 Derived classes [derived.classes]

[1](#1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/lib-intro.tex#L3395)

Virtual member function signatures definedfor a base class in the C++ standardlibrary may be overridden in a derived class defined in the program ([[class.virtual]](class.virtual "11.7.3 Virtual functions"))[.](#1.sentence-1)