| abortif | Ensure the truth of R expressions |
| abortifnot | Ensure the truth of R expressions |
| array-type-checks | Array type checks |
| at_least | Modify the behaviour of type checking functions |
| at_most | Modify the behaviour of type checking functions |
| bare | Modify the behaviour of type checking functions |
| check | Check the truth of tidy evaluated expressions |
| check_array | Array type checks |
| check_atomic | Type checks |
| check_bool | Scalar value checks |
| check_bytes | Type checks |
| check_character | Type checks |
| check_class | Check class inheritance of an object |
| check_complex | Type checks |
| check_data_frame | S3 type checks |
| check_data_table | S3 type checks |
| check_date | S3 type checks |
| check_dir | File and directory existence checks |
| check_double | Type checks |
| check_ext | File and directory existence checks |
| check_factor | S3 type checks |
| check_false | Scalar value checks |
| check_file | File and directory existence checks |
| check_finite | Forbidden value checks |
| check_inherits | Check class inheritance of an object |
| check_integer | Type checks |
| check_integerish | Type checks |
| check_length | Object property checks |
| check_list | Type checks |
| check_list_of | S3 type checks |
| check_logical | Type checks |
| check_matrix | Array type checks |
| check_named | Object property checks |
| check_ncol | Object property checks |
| check_non_empty | Object property checks |
| check_no_na | Forbidden value checks |
| check_nrow | Object property checks |
| check_null | Type checks |
| check_numeric | Type checks |
| check_nzchar | Forbidden value checks |
| check_ordered | S3 type checks |
| check_posixct | S3 type checks |
| check_posixlt | S3 type checks |
| check_r6 | Check if an object is of a specific object-oriented programming type |
| check_raw | Type checks |
| check_s3 | Check if an object is of a specific object-oriented programming type |
| check_s4 | Check if an object is of a specific object-oriented programming type |
| check_s7 | Check if an object is of a specific object-oriented programming type |
| check_scalar_atomic | Scalar type checks |
| check_scalar_bytes | Scalar type checks |
| check_scalar_character | Scalar type checks |
| check_scalar_complex | Scalar type checks |
| check_scalar_double | Scalar type checks |
| check_scalar_integer | Scalar type checks |
| check_scalar_integerish | Scalar type checks |
| check_scalar_list | Scalar type checks |
| check_scalar_logical | Scalar type checks |
| check_scalar_numeric | Scalar type checks |
| check_scalar_raw | Scalar type checks |
| check_scalar_vector | Scalar type checks |
| check_size | Object property checks |
| check_string | Scalar value checks |
| check_table | Array type checks |
| check_tibble | S3 type checks |
| check_tidytable | S3 type checks |
| check_true | Scalar value checks |
| check_unique | Forbidden value checks |
| check_vctr | S3 type checks |
| check_vector | Type checks |
| check_with | Check the truth of tidy evaluated expressions |
| forbidden-value-checks | Forbidden value checks |
| inheritance-checks | Check class inheritance of an object |
| in_range | Modify the behaviour of type checking functions |
| modifiers | Modify the behaviour of type checking functions |
| oop-checks | Check if an object is of a specific object-oriented programming type |
| path-checks | File and directory existence checks |
| property-checks | Object property checks |
| s3-check-builders | S3 check builders |
| s3-type-checks | S3 type checks |
| s3_df_check | S3 check builders |
| s3_vec_check | S3 check builders |
| scalar-type-checks | Scalar type checks |
| scalar-value-checks | Scalar value checks |
| type-checks | Type checks |
| walk-check | Apply a predicate check to each element of a vector |
| walk_check | Apply a predicate check to each element of a vector |