[cfe-dev] searching for an empty string in an empty string

Tomasz Mikolajczyk tmmikolajczyk at gmail.com
Tue Jun 2 07:51:14 PDT 2015


What should be the value of a pos variable in the following piece of code?

auto pos = std::string().find("");

I couldn't find answer to that and noticed it varies between standard
library implementations. For most I've checked pos is 0 (libstdc++, libcxx,
msvc). I noticed it is npos for Oracle Solaris SunPRO. I think that both
results are explainable. Is it an UB?

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