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This is a complete rewrite of SableCC to bring many new features:
- Improved lexer engine (additional operators, lookahead, and more).
- Improved parser engine (linear approximate LR(K) parsing, semantic selectors, and more).
- Improved conflict reporting (enabling LR grammar debugging).
- Flexible code generation (to enable back-ends for various languages).
- Improved syntax for CST->AST transformations.
- Handle complex inputs in lexers, such as various Unicode encodings in a single language specification, preprocessor output, values without numerical equivalents, etc.