Opening and closing parens will be added if an opening paren is not the
first non-whitespace character.
Arguments
- x
a list or vector
Value
x is returned, possibly modified with parens added.
Examples
ensure_parens(letters[1:4])
#> [1] "(a)" "(b)" "(c)" "(d)"
ensure_parens(as.list(letters[1:4]))
#> [[1]]
#> [1] "(a)"
#>
#> [[2]]
#> [1] "(b)"
#>
#> [[3]]
#> [1] "(c)"
#>
#> [[4]]
#> [1] "(d)"
#>
ensure_parens(c("(a)", "b", "(c)"))
#> [1] "(a)" "(b)" "(c)"