Makro defined at beginning of row is only available in first column - latex

Question

I am trying to create a new environment where I can add different rows, where each row contains a short makro:
\documentclass{report}
\newenvironment{test}{%
\begin{tabular}{|p{2cm}|p{2cm}|}
}
{
\end{tabular}
}
% function to add rows
\newcommand\row{%
\def\type{4}
cell 1: \type &
cell 2: \type \\
}
\begin{document}
\begin{test}
\row
\end{test}
\end{document}
Unfortunately, this gives an "undefined control sequence" error and the makro is not available in the second column:
How can makros be available in the whole row?

Answer 1

I finally found a solution following https://tex.stackexchange.com/questions/195747/using-in-macro-abstracting-a-tabulars-row. It's as simple as replacing def with gdef (minding that the definitions are now global):
\documentclass{report}
\newenvironment{test}{%
\begin{tabular}{|p{2cm}|p{2cm}|}
}
{
\end{tabular}
}
% function to add rows
\newcommand\row{%
\gdef\type{4}
cell 1: \type &
cell 2: \type \\
}
\begin{document}
\begin{test}
\row
\end{test}
\end{document}