NEWS

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restrictR 0.2.0

• New step require_class(): assert any class (e.g. factor, Date, POSIXct, fitted-model objects) through one verb, with exact for a strict first-class match.
• Validators gain .on_fail = "all": run every step and report all violations in one aggregated error instead of stopping at the first.
• New non-throwing helpers is_valid() (logical predicate) and validation_errors() (character vector of failure messages, empty when the value passes).
• Formula steps (require_length_matches(), require_nrow_matches()) now resolve non-base functions such as median(), sd(), and package exports. Data names are still taken only from explicit context.
• fail() now signals a structured restrictR_failure condition carrying path, found, and at, so failures can be collected and inspected programmatically.

restrictR 0.1.2

• New steps: require_scalar(), require_not_null(), require_unique(), require_named().
• New steps: require_positive() and require_negative() with strict argument (non-strict by default).
• require_integer() gains a strict argument. Default (strict = FALSE) accepts any numeric whole number; strict = TRUE requires the R integer type.

restrictR 0.1.1

• Export fail() so custom steps produce canonical structured errors.
• as_contract_text() now capitalizes every sentence, not just the first.
• require_between() and require_one_of() omit the At: line for scalar values where it adds no information.
• Vignette: added "Data Frame with Mixed Constraints" section, surfaced immutability in the overview, updated custom step examples to use fail().
• Documentation: tightened prose in the overview and examples.

restrictR 0.1.0 (2026-03-09)

• Initial release.
• Core constructor: restrict() for building composable validators.
• Building blocks: require_df(), require_numeric(), require_character(), require_length(), require_length_matches(), require_nrow_min(), require_has_cols(), require_col_numeric(), require_col_character(), require_col_range(), require_range(), require_one_of().
• Dependent validation via one-sided formulas with explicit context passing.
• Path-aware error messages (e.g. newdata$x2 must be numeric).
• as_contract_text() for roxygen-compatible documentation.