[dependabot]

Bumps hegeltest from 0.48.1 to 0.49.1.

Changelog

Sourced from hegeltest's changelog.

0.49.1 - 2026-10-06

This patch fixes several ways from_regex could generate a string that does not match its pattern as Python's re reads it, or reject a string it could have generated:

• A NUL character in the pattern was replaced by U+FFFD on the way to the engine, so from_regex("a\0b") generated "a\u{FFFD}b". The pattern now reaches the engine intact and generates "a\0b".
• Under (?i), characters are now compared the way Python does — by their simple lowercase mapping, plus Python's table of extra equivalences such as s and ſ — so (?i)[^k] no longer generates the Kelvin sign K, (?i)[^İ] no longer generates I, and (?i)k can generate every character Python accepts for it.
• Under (?a), case-insensitivity now folds only ASCII letters, so (?ai)À generates À and never à; \d, \s, \w and \b use their ASCII definitions; and explicit characters and ranges outside ASCII are kept rather than dropped, so (?a)[Ï-İ] and (?a)[^\x00-\xff] generate strings instead of rejecting every attempt.
• A repetition whose body the alphabet cannot supply is now generated zero times, and an alternation chooses only among the branches the alphabet can supply, instead of rejecting the attempt. (?-i:Ā)*k with .alphabet(gs::characters().max_codepoint(127)) generates k rather than tripping FilterTooMuch.

0.49.0 - 2026-10-06

This release removes the PrettyPrintable trait. Drawn values now print the way {:?} shows them: any Debug type is printable, and the failing-example report lays that output out through libhegel's new reflower, so a large value still wraps one field or element per line.

PrettyPrintable was the protocol a value used to describe itself in Rust-expression syntax (vec![1, 2], "a".to_string(), HashMap::from([…])). Because of the orphan rule, a test could not implement it for a type from another crate, so drawing a map to a taffy::Style or a just(some_foreign_value) needed a .print_as_debug() at every draw site, and a #[derive(PrettyPrintable)] type with such a field needed #[pretty(debug)] on it. Every one of those annotations is now unnecessary: map, just, sampled_from, boxed, #[hegel::composite] functions and the stateful generators are printable whenever the produced type implements Debug, which it almost always already does.

The cost is the Rust-expression syntax. Leaves and collections print in Debug form too — [1, 2] rather than vec![1, 2], "a" rather than "a".to_string(), {1: "a"} rather than HashMap::from([(1, "a")]), NaN rather than f64::NAN, 2020-02-29 rather than NaiveDate::from_ymd_opt(2020, 2, 29).unwrap() — so that a report never mixes the two forms. A derived generator still prints field by field as it draws, in the Name { field: value } shape #[derive(Debug)] output takes; an enum variant prints as Variant { field: value }, without the enum's name, as Debug writes it.

Code that named the removed items needs updating:

• #[derive(hegel::PrettyPrintable)] and #[pretty(debug)]: delete them; #[derive(Debug)] is all a type needs.
• hegel::pretty_print_as_debug!(Type): delete it.
• A hand-written impl PrettyPrintable for Type: delete it. To print a type differently from its Debug output, print through the generator with .print_with(|value, printer| …), which now receives a printer with debug, group, seq and separator methods for composing the representation.
• .print_as_value(): delete it — value-producing generators print by value already — or, on a hand-written Generator of a Debug type, replace it with .print_as_debug().
• hegel::pretty::print_debug_repr(&format!("{value:?}"), printer): replace with printer.debug(&value).
• A PrettyPrintable bound on a helper's type parameter: replace with Debug.

PrettyPrinter gains debug, which prints any Debug value with its bracket structure recovered and laid out by the engine; reflow, which does the same for an already-formatted representation; group and seq, closure-based forms of a delimited group and a comma-separated sequence; and separator, the , plus break point between two items. Draw-site printability errors now lead with #[derive(Debug)] as the fix.

Commits

• cc88c23 Bump hegeltest to 0.49.1 and hegeltest-c to 0.45.0 and update changelog
• c69235b Merge pull request #519 from hegeldev/regex-python-semantics
• 5cd77ac Pin the rejection of a class the regex alphabet cannot supply
• 6f296e7 Cover the regex generator's rejection paths
• 93b5796 Fix regex generation against Python re semantics
• 82d8f84 Bump hegeltest to 0.49.0 and hegeltest-c to 0.44.2 and update changelog
• 3204666 Merge pull request #518 from hegeldev/remove-pretty-printable
• 0091a2b Split the one_of printability golden by toolchain wording
• ccfd4cb Expect the Debug form of a shrunk vec in the flaky replay test
• 6d52287 Cover the reflower's prefix folding of multi-item, padded and space-split leaves
• Additional commits viewable in compare view

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