NEWS

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caverify 0.2.0 (2026-09-20)

• The default v = NULL now infers per-column symbol counts from each column's own maximum, identical to v = "auto", which remains as an explicit alias. Versions 0.1.x inferred one uniform value from the global data range, which misjudges mixed-level arrays; changed on a recommendation by Ulrike Groemping, since a default should not assume a uniform CA. Declare a scalar v where the check should also catch a column that fails to reach its intended symbol count.
• NA semantics corrected, a breaking change from 0.1.x. An NA marks a flexible ("don't care") entry: a row now contributes nothing to a projection in which it has an NA, so a verified array is covering no matter how its NA entries are later filled. The 0.1.x behaviour let one NA count as every symbol at once, per tuple independently, and could certify arrays that no single choice of values would make covering (a 4-run array passed as a strength-4 covering array on 21 four-level columns). Thanks to Ulrike Groemping for the counterexample. The new behaviour also agrees exactly with CAs::coverage() on arrays with NAs.
• Mixed-level covering arrays (MCAs): v now also accepts an integer vector of length ncol(x) giving each column its own number of symbols, or the string "auto" to infer per-column symbol counts from each column's own maximum. Tuple counting and indexing in the C kernel are mixed-radix; a uniform array is the degenerate case and takes the same code path.
• A scalar v behaves exactly as in 0.1.x. The only change for existing callers is the v = NULL default described above, which now reads each column's own symbol count. A uniform array with every symbol present in every column verifies identically under both readings.
• print shows mixed-level results with the levels profile in exponent notation (e.g. levels 4^2 3 2^3).
• Tests: mixed-level brute-force oracle plus randomized mixed-level cross-validation added.

caverify 0.1.3 (2026-08-23)

• Fixed an installation failure on R-devel with clang 22, seen on the CRAN flavour r-devel-linux-x86_64-fedora-clang. The R headers remap match to Rf_match unless R_NO_REMAP is defined, and clang 22's omp.h uses match as a clause of #pragma omp declare variant, so an omp.h included after the R headers no longer parsed. omp.h is now included first and the C code compiles with R_NO_REMAP and the Rf_ prefixed API. No user-visible change.

caverify 0.1.2 (2026-08-20)

• Automatic thread selection: by default the checker now uses half the machine's logical cores (single-threaded for small jobs, capped to 2 during CRAN checks). No setup needed; options(caverify.threads = n) or the threads argument still override.

caverify 0.1.1

• Long verifications are now interruptible (Escape / Ctrl-C) without aborting the R session: combinations are processed in batches with an interrupt check between batches, and all working memory is R-managed so interruption cannot leak.
• threads now defaults to getOption("caverify.threads", 1L).
• DESCRIPTION metadata cleanup (URL, BugReports).

caverify 0.1.0

• First version: registered .Call interface, NA as wildcard ("flexible value"), optional OpenMP threading, 0- or 1-based symbol detection, tests including randomized cross-validation against a pure R oracle.