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

corner cases are handled when interpolating dot names

Code
  (expect_error(quos(!!var := NULL)))
Output
  <error/rlang_error>
  Error in `quos()`:
  ! The LHS of `:=` must be a string, not `NULL`.
Code
  (expect_error(list2(!!c("a", "b") := NULL)))
Output
  <error/rlang_error>
  Error in `list2()`:
  ! The LHS of `:=` must be a string, not a character vector.

ensyms() captures multiple symbols

Code
  err(fn(foo()))
Output
  <error/rlang_error>
  Error in `sym()`:
  ! Can't convert a call to a symbol.

ensym() unwraps quosures

Code
  err(fn(!!quo(foo())))
Output
  <error/rlang_error>
  Error in `ensym()`:
  ! Can't convert to a symbol.

ensyms() unwraps quosures

Code
  err(fn(!!!quos(foo, bar())))
Output
  <error/rlang_error>
  Error in `sym()`:
  ! Can't convert a call to a symbol.

auto-named expressions can be unique-repaired

Code
  expect_equal(dots_names(1, foo = 1, 1, foo = 2), c("1...1", "foo", "1...3",
    "foo"))
Message
  New names:
  * `1` -> `1...1`
  * `1` -> `1...3`
Code
  expect_equal(dots_names(bar, foo = 1, bar, foo = 2), c("bar...1", "foo",
    "bar...3", "foo"))
Message
  New names:
  * `bar` -> `bar...1`
  * `bar` -> `bar...3`