nse-inject.md
In rlang: Functions for Base Types and Core R and 'Tidyverse' Features

englue() has good error messages (#1531)

Code
  fn <- (function(x) englue(c("a", "b")))
  (expect_error(fn()))
Output
  <error/rlang_error>
  Error in `englue()`:
  ! `x` must be a single string, not a character vector.
Code
  fn <- (function(x) englue(env()))
  (expect_error(fn()))
Output
  <error/rlang_error>
  Error in `englue()`:
  ! `x` must be a single string, not an environment.
Code
  fn <- (function(x) glue_embrace("{{ x }}_foo"))
  (expect_error(fn()))
Output
  <error/rlang_error>
  Error in `fn()`:
  ! `x` is absent but must be supplied.
Code
  fn <- (function(x) englue("{{ x }}_foo"))
  (expect_error(fn()))
Output
  <error/rlang_error>
  Error in `fn()`:
  ! `x` is absent but must be supplied.
Code
  fn <- (function(x) list2("{{ x }}_foo" := NULL))
  (expect_error(fn()))
Output
  <error/rlang_error>
  Error in `fn()`:
  ! `x` is absent but must be supplied.

can wrap englue() (#1565)

Code
  (expect_error(my_englue(c("a", "b"))))
Output
  <error/rlang_error>
  Error in `my_englue()`:
  ! `text` must be a single string, not a character vector.
Code
  (expect_error(my_englue(env())))
Output
  <error/rlang_error>
  Error in `my_englue()`:
  ! `text` must be a single string, not an environment.
Code
  (expect_error(fn()))
Output
  <error/rlang_error>
  Error in `fn()`:
  ! `x` is absent but must be supplied.

englue() checks for the size of its result (#1492)

Code
  fn <- (function(x) englue("{{ x }} {NULL}"))
  (expect_error(fn(foo)))
Output
  <error/rlang_error>
  Error in `englue()`:
  ! The glue string must be size 1, not 0.
Code
  fn <- (function(x) list2("{{ x }} {NULL}" := NULL))
  (expect_error(fn(foo)))
Output
  <error/rlang_error>
  Error in `englue()`:
  ! The glue string must be size 1, not 0.