0.29.0

Standard library

• Fix example codes in multiple places. (#7718, thanks @maiha)

Macros

• Fix inheritance support of record macro. (#7811, thanks @asterite)
• Omit quotes in puts macro output. (#7734, thanks @asterite)

Numeric

• (performance) Optimize String#to_u methods for the case of a negative number. (#7446, thanks @r00ster91)

Text

• (breaking-change) Deprecate String#at, use String#char_at. (#7633, thanks @j8r)
• (breaking-change) Change String#to_i to parse octals with prefix 0o (but not 0 by default). (#7691, thanks @icy-arctic-fox)
• (breaking-change) Restrict some String#to_i arguments to be Bool. (#7436, thanks @j8r)
• Add downcase option to String#camelcase. (#7717, thanks @wontruefree)
• Add support for unicode 12.0.0. (#7721, thanks @Blacksmoke16)
• Fix Unicode not showing up in the API docs. (#7720, thanks @r00ster91)

Collections

• (breaking-change) Remove Slice#pointer. (#7581, thanks @Maroo-b)
• Add sort methods to Slice. (#7597, thanks @Maroo-b)
• Add Slice#[]?. (#7701, thanks @Sija)
• Improve docs for Slice#[]. (#7780, thanks @Sija)

Serialization

• YAML: let String handle numbers too. (#7809, thanks @asterite)

Time

• Fix time format RFC 3339 to not include offset seconds. (#7492, thanks @straight-shoota)

Files

• (breaking-change) Rename File::DEVNULL to File::NULL. (#7778, thanks @r00ster91)
• Fix handling of files starting with ~ in Path#expand. (#7768, thanks @byroot)
• Fix Dir.glob(match_hidden: false) not hiding hidden files properly. (#7774, thanks @ayazhafiz)

Networking

• (breaking-change) Let IO#copy return UInt64. (#7660, thanks @asterite)
• Add support for UDP multicast. (#7423, thanks @stakach)
• Add missing requires to openssl.cr. (#7803, thanks @RX14)
• Add IO::MultiWriter#flush. (#7765, thanks @mamantoha)
• Add OpenSSL::SSL::Socket#cipher and #tls_version. (#7445, thanks @carlhoerberg)
• Improve URI#normalize. (#7635, thanks @straight-shoota)
• Improve documentation of some URI methods. (#7796, thanks @r00ster91)
• Refactor StaticFileHandler specs for Last-Modified header. (#7640, thanks @straight-shoota)
• Refactor compression usage in handler specs. (#7819, thanks @asterite)

Crypto

• (breaking-change) Rename Crypto::Bcrypt::Password#== to #verify. (#7790, thanks @asterite)

Concurrency

• Add docs for Channel. (#7673, thanks @j8r)

Compiler

• (breaking-change) Fix require relative path resolution. (#7758, thanks @asterite)
• (breaking-change) Disallow '!' or '?' at the end of the LHS in an assignment. (#7582, thanks @Maroo-b)
• Allow running compiler_specs with specific flags. (#7837, thanks @bcardiff)
• Fix extend from generic types. (#7812, thanks @asterite)
• Don't virtualize types in Union(...) and keep more accurate type information. (#7815, thanks @asterite)
• Do not generate debug metadata for arguments of naked functions. (#7775, thanks @eyusupov)
• Detect deprecation on initialize methods and methods with named args. (#7724, thanks @bcardiff)
• Fix track of AST nodes location. (#7827, thanks @asterite)
• Fix offsetof not being usable with macros. (#7703, thanks @malte-v)
• Allow parsing of call &.@ivar. (#7754, thanks @asterite)
• Fix Def#to_s with **options and &block. (#7854, thanks @makenowjust)
• Check pointerof inner expression for errors. (#7755, thanks @asterite)
• Fix some error messages. (#7833, thanks @asterite)
• Improve wording of pointerof(self) parser error. (#7542, thanks @r00ster91)
• Fix typo. (#7828, thanks @RX14)

Language semantics

• (breaking-change) Fix new/initialize lookup regarding modules. (#7818, thanks @asterite)
• (breaking-change) Don't precompute sizeof on abstract structs and modules. (#7801, thanks @asterite)
• Consider macro calls in @ivar initializer. (#7750, thanks @asterite)
• Give precedence to T.class over Class in method lookup. (#7759, thanks @asterite)
• Honor enum base type on non-default values. (#7776, thanks @asterite)
• Avoid lookup of private def defined inside macro. (#7733, thanks @asterite)
• Improve type flow of var in if with &&. (#7785, thanks @asterite)
• Fix handling of NoReturn in if. (#7792, thanks @asterite)
• Improve edge issues with while and rescue. (#7806, thanks @asterite)
• Improve error on macro call in proc pointer. (#7757, thanks @asterite)
• Fix error on named args forwarding. (#7756, thanks @asterite)
• Check NoReturn type in named args. (#7761, thanks @asterite)
• Fix internal handling of unbound/abstract generic types. (#7781, thanks @asterite)
• Fix wrong cast to unbound generic type. (#7793, thanks @asterite)
• Fix subclass observer to handle edge case call over generic types. (#7735, thanks @asterite)
• Fix edge case of abstract struct with one subclass. (#7787, thanks @asterite)
• Make automatic cast work with with ... yield. (#7746, thanks @asterite)

Tools

• Allow to lookup class and module implementations. (#7742, thanks @makenowjust)
• Refactor old duplicated 'def contains_target'. (#7739, thanks @makenowjust)

Formatter

• Don't produce unnecessary newline before named args following heredoc. (#7695, thanks @makenowjust)
• Fix formatting of multiline call arguments. (#7745, thanks @makenowjust)
• Fix formatting of annotations with newlines and spaces. (#7744, thanks @makenowjust)
• Refactor code to format &.[]. (#7699, thanks @makenowjust)

Others

• CI improvements and housekeeping. (#7705, #7852, thanks @bcardiff)
• Move VERSION inside ./src. (#7804, thanks @bcardiff)