`extract_variables` does not work if object has a name attribute

[tvarnetperez]

Reproducible example

library(dplyr)
#> 
#> Attaching package: 'dplyr'
#> The following objects are masked from 'package:stats':
#> 
#>     filter, lag
#> The following objects are masked from 'package:base':
#> 
#>     intersect, setdiff, setequal, union
library(multiverse)
#> Loading required package: knitr

M <- multiverse()

inside(M, {
  data <- rnorm(100, 50, 20)
  
  x.mean <- mean(data, trim = branch(
    trim_values,
    "trim_none" ~ 0,
    "trim_1pc" ~ 0.05,
    "trim_5pc" ~ 0.025,
    "trim_10pc" ~ 0.05
  ))
  
  # Create a copy with a name attribute
  x.mean_named <- x.mean
  names(x.mean_named) <- "NAME"
})

# Extracts the relevant variable from the multiverse
M %>%
  extract_variables(x.mean)
#> # A tibble: 4 × 7
#>   .universe trim_values .parameter_assignment .code            .results .errors
#>       <int> <chr>       <list>                <list>           <list>   <list> 
#> 1         1 trim_none   <named list [1]>      <named list [1]> <env>    <lgl>  
#> 2         2 trim_1pc    <named list [1]>      <named list [1]> <env>    <lgl>  
#> 3         3 trim_5pc    <named list [1]>      <named list [1]> <env>    <lgl>  
#> 4         4 trim_10pc   <named list [1]>      <named list [1]> <env>    <lgl>  
#> # ℹ 1 more variable: x.mean <dbl>

# Extracts the relevant named variable from the multiverse
M %>%
  extract_variables(x.mean_named)
#> Error in `list_unchop()`:
#> ! Can't merge the outer name `x.mean_named` with a named vector.
#> Please supply a `.name_spec` specification.

^{Created on 2025-05-28 with reprex v2.1.1}

Expected behavior would be either that the same output results from x.mean or x.mean_named (i.e. a call to unname() somewhere in the pipeline), or that the x.mean_named can be extracted with name attribute rather than returning an error.

Surprised this hasn't come up before as plenty of lm output, such as coefficient estimates, comes in the form of named vectors.

Session Info

> sessionInfo()
R version 4.3.3 (2024-02-29 ucrt)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 11 x64 (build 22621)

Matrix products: default


locale:
[1] LC_COLLATE=Spanish_Chile.utf8  LC_CTYPE=Spanish_Chile.utf8    LC_MONETARY=Spanish_Chile.utf8
[4] LC_NUMERIC=C                   LC_TIME=Spanish_Chile.utf8    

time zone: Europe/Berlin
tzcode source: internal

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] data.table_1.17.4 dplyr_1.1.4       multiverse_0.6.2  knitr_1.50       

[abhsarma]

Thanks for pointing it out. I'll take a look into it in the next week or so!