Changed

• Use Rbscmlex instead of built-in lexer. (#6)
• Use Rubasteme instead of built-in AST and parser. (#6)

Fixed

• Fix #5: too old required_ruby_version.

Added

• Re-write the parser and evaluator mechanism.
• Add tests for SchemeParser and Translator.
• Add a mechanism to replace comparison operator characters in identifiers.
  • e.g. char<? -> char_lt?

Added

• Add char:
  • add Rus3::Char class,
  • modify Rus3::Parser::Lexer to accept a character literal,
  • modify Rus3::Parser::SchemeParser to parse and translate a character literal,
• Add new error classes (CharRequiredError),
• Add tests around char.

Added

• Add vector:
  • add Rus3::Vector class,
  • modify Rus3::Parser::Lexer to accept a vector literal,
  • modify Rus3::Parser::SchemeParser to parse and translate a vector literal,
• Add new error classes (VectorRequiredError and ExceedUpperLimitError),
• Add tests around vector.

Changed

• Modify Rus3::Parser::Lexer to convert "->" to "to",
  • now, the Scheme identifier such "list->vector" is usable in the REPL

• Initial release:
  • Rus3 can translate fundamental syntax of Scheme into Ruby.