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

Wed Jun 3 11:38:23 PDT 2015

On 06/ 2/15 05:51 PM, Tomasz Mikolajczyk wrote:
> Hi,
>
> 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?
In the latest SunPRO 12.4 pos is 0 as well.

Vladimir.

>
> Regards,
> Tomek
>
>
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