% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/faq.R
\name{faq-error-incompatible-attributes}
\alias{faq-error-incompatible-attributes}
\title{FAQ - Error/Warning: Some attributes are incompatible}
\description{
This error occurs when \code{\link[=vec_ptype2]{vec_ptype2()}} or \code{\link[=vec_cast]{vec_cast()}} are supplied
vectors of the same classes with different attributes. In this
case, vctrs doesn't know how to combine the inputs.

To fix this error, the maintainer of the class should implement
self-to-self coercion methods for \code{\link[=vec_ptype2]{vec_ptype2()}} and \code{\link[=vec_cast]{vec_cast()}}.
}
\section{Implementing coercion methods}{
\itemize{
\item For an overview of how these generics work and their roles in vctrs,
see \code{\link[=theory-faq-coercion]{?theory-faq-coercion}}.
\item For an example of implementing coercion methods for simple vectors,
see \code{\link[=howto-faq-coercion]{?howto-faq-coercion}}.
\item For an example of implementing coercion methods for data frame
subclasses, see
\code{\link[=howto-faq-coercion-data-frame]{?howto-faq-coercion-data-frame}}.
\item For a tutorial about implementing vctrs classes from scratch, see
\code{vignette("s3-vector")}.
}
}