[iostream.limits.imbue]

# 31 Input/output library [[input.output]](./#input.output)

## 31.2 Iostreams requirements [[iostreams.requirements]](iostreams.requirements#iostream.limits.imbue)

### 31.2.1 Imbue limitations [iostream.limits.imbue]

[1](#1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L44)

No function described in [[input.output]](input.output "31 Input/output library") except forios_base​::​imbue and basic_filebuf​::​pubimbue causes any instance ofbasic_ios​::​imbue orbasic_streambuf​::​imbue to be called[.](#1.sentence-1)

If any user function called from a function declared in [[input.output]](input.output "31 Input/output library") or
as an overriding virtual function of any class declared in [[input.output]](input.output "31 Input/output library") callsimbue,
the behavior is undefined[.](#1.sentence-2)