=for apidoc Am|void|SvIOK_only_UV|SV* sv
Tells and SV that it is an unsigned integer and disables all other OK bits.
-=for apidoc Am|void|SvIOK_UV|SV* sv
+=for apidoc Am|bool|SvIOK_UV|SV* sv
Returns a boolean indicating whether the SV contains an unsigned integer.
=for apidoc Am|void|SvUOK|SV* sv
Returns a boolean indicating whether the SV contains an unsigned integer.
-=for apidoc Am|void|SvIOK_notUV|SV* sv
+=for apidoc Am|bool|SvIOK_notUV|SV* sv
Returns a boolean indicating whether the SV contains a signed integer.
=for apidoc Am|bool|SvNOK|SV* sv
SvFLAGS(sv) |= (SVf_NOK|SVp_NOK))
/*
-=for apidoc Am|void|SvUTF8|SV* sv
+=for apidoc Am|bool|SvUTF8|SV* sv
Returns a boolean indicating whether the SV contains UTF-8 encoded data.
=for apidoc Am|void|SvUTF8_on|SV *sv