v0.5.1

Bug Fixes

• Fixed a variable-name collision in generated dump() methods: a rule variable named the same as an internal parameter (e.g. p) could produce broken generated code

Improvements

• Documented the generated file's structure (AST, walkers, parser, lexer, interface class, optional main())
• Documented go's automatic top-down traversal, skip(), and manual traversal mode
• Documented that %function return types can be any C++ type, not just primitives
• Documented that rule variable names must not collide with go, skip, %members, or %function names

Installation

• Windows: extract ycc-v0.5.1-windows-x86_64.zip, copy ycc.exe to anywhere on the PATH
• macOS: extract ycc-v0.5.1-macos-arm64.tar.gz, copy ycc to anywhere on the PATH
• Linux: extract ycc-v0.5.1-linux-x86_64.tar.gz, copy ycc to anywhere on the PATH

v0.5.0

Features

• Added C++23 support
• Implemented %enable_log pragma for per-source (lexer/parser/generator) debug logging
• Implemented %class_members and text-string walker output mode

Improvements

• Project version is now derived automatically from git tags
• Added CI and a release workflow building Linux/macOS/Windows binaries
• Rule precedence now defaults to a rule's last terminal, matching Yacc/Bison/Lemon convention
• Indexed FIRST/FOLLOW rule lookups and other parser/lexer performance improvements
• Rewrote the documentation: verified Quick Start, comparison vs Bison/ANTLR/tree-sitter, Known Limitations doc

Bug Fixes

• Fixed LALR shift/reduce precedence comparison
• Fixed crash when two or more overlapping keyword literals share a token
• Fixed _findSmallestSuperset to pick the smallest match, not the first
• Fixed a use-after-free error and a recursive-rule-handling bug
• Fixed std::print/std::println portability on Apple Clang and MSVC

Installation

• Windows: extract ycc-v0.5.0-windows-x86_64.zip, copy ycc.exe to anywhere on the PATH
• macOS: extract ycc-v0.5.0-macos-arm64.tar.gz, copy ycc to anywhere on the PATH
• Linux: extract ycc-v0.5.0-linux-x86_64.tar.gz, copy ycc to anywhere on the PATH

2026-01: January Release

Features

• Support multiple walkers in command line options

Improvements

• Additional functions in TextWriter
• Use CMAKE_PARSE_ARGUMENTS in .cmake file

Bug Fixes

• Fixed indentation issue
• Remove redundant lines of code from walker

Installation

• Windows: Copy ycc.exe to anywhere on the PATH
• OSX: Rename ycc.osx to ycc and copy to anywhere on the PATH
• Linux: Rename ycc.linux to ycc and copy to anywhere on the PATH

2025-12: December release

Features

• implemented inline/external interfaces: A walker can be implemented in a separate .cpp file
• implemented %lexer_include pragma: A lexer_mode can be included inside one or more other lexer_modes
• Added quickstart tutorial by @rajch: Follow the steps to get started

Improvements

• improved error reporting
• improved auto-traverse performance
• error checking for duplicate rules

Bug Fixes

• Fixed stringify error
• Fixed %namespace error
• Fixed separate (non-Amalgamated) main() issue

Installation

• Windows: Copy ycc.exe to anywhere on the PATH
• OSX: Rename ycc.osx to ycc and copy to anywhere on the PATH
• Linux: Rename ycc.linux to ycc and copy to anywhere on the PATH

2025-11-002: Patch Release

Features

• Implemented -t option in generated parser to print matched AST
  • -t2 to print full AST tree
  • -t1 to print AST as a single line S-Expression (for unit tests)
• Implemented gcc support
• Implemented --version command line parameter

Improvements

• Improved unit tests
• Improved readability of generated code

Bug fixes

• fixed #line numbering
• Fixed precedence issue
• Fixed epsilon issue
• fixed version number to 0.2.1

Installation

• Windows: Copy ycc.exe to anywhere on the PATH
• OSX: Rename ycc.osx to ycc and copy to anywhere on the PATH
• Linux: Rename ycc.linux to ycc and copy to anywhere on the PATH

2025-11-001

Features

• Implemented -t option in generated parser to print matched AST
  • -t2 to print full AST tree
  • -t1 to print AST as a single line S-Expression (for unit tests)
• Implemented gcc support
• Implemented --version command line parameter

Improvements

• Improved unit tests
• Improved readability of generated code

Bug fixes

• fixed #line numbering
• Fixed precedence issue
• Fixed epsilon issue

Installation

• Windows: Copy ycc.exe to anywhere on the PATH
• OSX: Rename ycc.osx to ycc and copy to anywhere on the PATH
• Linux: Rename ycc.linux to ycc and copy to anywhere on the PATH