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T

Yukihiro "Matz" Matsumoto 225cdaa16a mruby-compiler: eliminate bison shift-reduce conflict for 'in'

Add precedence declarations to resolve the ambiguity between:
- One-line pattern match: `arg in pattern`
- Case/in clause: `case expr; in pattern; end`

When seeing `arg in`, the parser should shift to parse `arg in pattern`
as a complete expression (matching CRuby behavior), not reduce `arg`
to start a case clause.

Changes:
- Add keyword_in to %nonassoc precedence declarations
- Add %prec tLOWEST to the plain `arg` reduction rule

This eliminates all bison shift-reduce conflicts (was 2, now 0).

Co-authored-by: Claude <noreply@anthropic.com>

2025-12-29 17:56:54 +09:00

core

mruby-compiler: eliminate bison shift-reduce conflict for 'in'

2025-12-29 17:56:54 +09:00

mrbgem.rake

Separating the build setup portion from the GEMS setup block

2025-09-11 22:53:06 +09:00

README.md

mruby-compiler: add README.md │

2025-07-02 07:14:04 +09:00

README.md

mruby-compiler

This mrbgem provides the mruby compiler, which is responsible for parsing Ruby code and generating mruby bytecode.

Functionality

The mruby-compiler gem includes the following components:

Parser: Translates Ruby source code into an abstract syntax tree (AST).
Code Generator: Traverses the AST to produce executable mruby bytecode.
mrbc executable: A command-line tool for compiling .rb files into .mrb bytecode files.

Usage

The mrbc (mruby-bin-mrbc) executable will generate compiled binary from Ruby programs via this gem.

Example of using mrbc:

# Compile a Ruby script to bytecode
bin/mrbc my_script.rb

# Run the compiled script
bin/mruby my_script.mrb