Consider supporting `"{var}" = foo` and superseding `:=`

[lionel-]

[lionel-]

Unfortunately we can't enable glue interpolation in = because this is incompatible with the way the compiler optimises promises away:

fn <- function() {
  foo <- "foo"
  rlang::list2("{foo}" = NULL)
}

# First time is fine
fn()
#> $foo
#> NULL

# After compilation we no longer have env info
fn()
#> Error:
#> ! object 'foo' not found

[psychelzh]

Does this mean "var" = foo will never be possible?

[lionel-]

Unfortunately yes