fix: keeps labels modifying factors and creates new factors correctly

man/with_labels.Rd

@@ -0,0 +1,21 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/utils-labels.R
+\name{with_labels}
+\alias{with_labels}
+\title{Evaluate an expression while preserving column labels}
+\usage{
+with_labels(df, expr)
+}
+\arguments{
+\item{df}{A data frame carrying \code{"label"} attributes.}
+
+\item{expr}{An unquoted expression that transforms \code{df} and returns a data frame.}
+}
+\value{
+The data frame produced by \code{expr}, with original labels restored.
+}
+\description{
+Snapshots labels from \code{df} before evaluating \code{expr}, then reapplies them to
+matching columns in the result. New columns created inside \code{expr} receive no
+label automatically.
+}