Require Length Matching an Expression

Validates that length(value) equals the result of evaluating a formula. The formula is evaluated using only explicitly passed context arguments, plus .value (the validated value) and .name (the restriction name).

Usage

require_length_matches(restriction, formula)

Arguments

restriction

a restriction object.

formula

a one-sided formula (e.g. ~ nrow(newdata)).

Value

The modified restriction object.

See also

Other structure checks: require_dim(), require_has_cols(), require_length(), require_length_max(), require_length_min(), require_named(), require_names(), require_ncol_matches(), require_ncol_min(), require_nrow_matches(), require_nrow_min(), require_scalar(), require_sorted(), require_unique_names()