Changelog

Source: NEWS.md

favr 2.0.0

CRAN release: 2026-08-20

Refactor of the package to focus on function argument validation through “check” functions that throw an error if validation fails and return NULL (or occasionally the input) invisibly if validation succeeds.

New Features

General Validation

• abortif() and abortifnot() functions to check conditions and error if a condition is TRUE or FALSE, respectively.
• check() function to check conditions using tidy eval and error if a condition is TRUE.
• check_with() function to check conditions in a data-masked context and error if a condition is TRUE.
• walk_check() function to walk a predicate over a vector and error if any element fails the check.

Type and Class Validation

• check_inherits() and check_class() functions to check the class of an object and error if it does not inherit from a specified class.

Type Validation

• check_list(), check_atomic(), check_vector(), check_integer(), check_double(), check_numeric(), check_character(), check_logical(), check_complex(), check_raw(), check_bytes() and check_null() functions to check the type of an object and error if it does not match the specified type.

• check_scalar_list(), check_scalar_atomic(), check_scalar_vector(), check_scalar_integer(), check_scalar_double(), check_scalar_numeric(), check_scalar_character(), check_scalar_logical(), check_scalar_complex(), check_scalar_raw() and check_scalar_bytes() functions to check if an object is a scalar of the specified type and error if it is not.

• check_array(), check_matrix() and check_table() functions to check if an object is an array, matrix, or table, respectively, and error if it is not.

OOP Type Validation

• check_s3(), check_s4(), check_s7() and check_r6() functions to check if an object is of the specified OOP type and error if it is not.

S3 Type Validation

• check_factor(), check_ordered(), check_date(), check_posixct() and check_posixlt() functions to check if an object is of the specified S3 vector type and error if it is not.

• check_data_frame(), check_tibble(), check_data_table() and check_tidytable() functions to check if an object is of the specified S3 data frame type and error if it is not.

• check_vctr() and check_list_of() functions to check if an object is of the specified vctrs S3 type and error if it is not.

• s3_vec_check() and s3_df_check() functions for developers to create their own S3 type checks for vector and data frame types, respectively.

Check Modifiers

• bare() modifier to check for bare objects (i.e. objects with no class attribute) in the type check functions, or bare S3 objects (where the expected S3 class is first in the class attribute vector) in the S3 type check functions.

• at_least(), at_most(), and in_range() modifiers to check for ranges in length/number of rows/number of columns.

Scalar Value Validation

• check_true(), check_false(), check_bool() and check_string() functions to check if an object is a scalar of the specified type and value and error if it is not.

Forbidden Values Validation

• check_no_na(), check_finite(), check_unique() and check_nzchar() functions to check for the presence of forbidden values and error if found.

Property Validation

• check_length(), check_nrow(), check_ncol(), check_size() and check_non_empty() functions to check for an expected length/size of an object and error if it is not.

• check_named() function to check the names of an object and error if the object is not named or (optionally) if the names contain empty or duplicated elements.

File and Directory Validation

• check_dir() and check_file() functions to check if a directory or file exists and error if it does not.
• check_ext() function to check the file extension of a file/path and error if it does not match the specified extensions.

Questioning

Removed the online documentation for enforce(), schema(), add_to_schema(), enforce_schema(), and the associated casting and recycling helpers (cast(), lossy(), recycle() and coerce()).

Soft-Deprecated

• abort_if_not() should be replaced with abortifnot() or check().
• cast_if_not() and recycle_if_not() should be replaced with their vctrs equivalents, vctrs::vec_cast() and vctrs::vec_recycle(), respectively.
• All are_*() functions and the have_names() function - their use cases were limited and are easily replicated using base::vapply() and the associated predicate function.

Bug Fixes

• Fixed a bug where are_scalar_integerish() would immediately error due to an erroneous .n argument.

favr 1.0.0

CRAN release: 2025-12-15

• Added a NEWS.md file to track changes to the package.