v1.6.0

• New function new_name() which generates unique names for additional data frame variables (ensuring they are not already present).

• New assertion functions:

  • assert_character_not_na(), assert_chr_not_na()
  • assert_double_not_na(), assert_dbl_not_na()
  • assert_integer_not_na(), assert_int_not_na()
  • assert_integerish(), assert_whole()
  • assert_scalar_integerish(),
  • assert_logical_not_na(), assert_lgl_not_na()
  • assert_numeric_not_na(), assert_num_not_na()
  • assert_scalar_logical_not_na(), assert_scalar_lgl_not_na()
  • assert_string_not_na()
  • assert_between()

• Assertions errors are now given the class "ympes-error".

• breaking change: Assertions no longer use ... to add attributes to the resulting error conditions.