byacc を Homebrew, apk, apt, dnf, MacPorts, Nix, pacman, zypper, scoop でインストール

プロジェクトリンク

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コマンドとエイリアス

• byacc

プロジェクトの歴史

Thomas E. Dickey's official BYACC page says Robert Corbett wrote byacc around 1990 and notes Corbett was also the original author of bison. The page cites its compatibility with original yacc and records that Dickey later converted the original K&R C source to ANSI C and continued maintaining it.

The original README, preserved in the maintained source tree, states that Berkeley Yacc accepts input conforming to AT&T yacc documentation, is distributed in the public domain, and allows generated parsers to be distributed freely.

採用の歴史

BYACC became popular because it was fast, BSD/public-domain-friendly, and yacc-compatible. The official page quotes John Levine's later account that Corbett's implementation was faster than AT&T yacc and quickly became the most popular yacc variant.

The official related-links section points to Debian packages, FreeBSD and NetBSD sources or package collections, and notes that FreeBSD imported this maintained version into its vendor tree in 2012. The supplied package facts show broad packaging across Homebrew, Alpine, Debian, Fedora, MacPorts, Nix, Pacman, Scoop, Ubuntu, and zypper.

使われ方

byacc is used as a yacc replacement in build systems and compiler-toolchain work: it reads a grammar and emits C parser source. It is often chosen when projects want yacc compatibility, small generated output, permissive/public-domain licensing, and portability to non-GCC or older C environments.

パッケージ好きにとっての重要性

byacc is package-nerd significant because it is one of the classic parser generators that still matters in modern ports trees. It is tiny but strategically important: swapping yacc implementations can change generated C, expose build assumptions, or avoid a dependency on GNU bison.

Its public-domain status and generated-parser licensing are part of why it persists in base systems, embedded build environments, and conservative packaging stacks.

タイムライン

• 1990: Robert Corbett writes Berkeley Yacc around this period, according to the official history page.
• 1992: O'Reilly's Lex & Yacc notes byacc compatibility with original yacc, as summarized by the official page.
• 2000: Thomas E. Dickey begins ANSI C portability work while porting software to VMS.
• 2005: Dickey notes reviewing FreeBSD versus bison YYPARSE_PARAM compatibility.
• 2012: FreeBSD imports Dickey's maintained version into its vendor tree, according to the official related-links section.
• 2026: The official CHANGES file shows continuing maintenance.

Related projects

• AT&T yacc is the compatibility baseline.
• GNU bison is the major alternative yacc-family parser generator.
• Perl-Byacc, BYACC/J, and BtYacc are related derivatives or extensions named by the official related-links section.
• flex and lex are commonly paired lexical-scanner tools in yacc-based workflows.

ソース

• https://github.com/ThomasDickey/byacc-snapshots
• https://invisible-island.net/byacc/CHANGES
• https://invisible-island.net/byacc/byacc.html
• source_facts.package-manager