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Support dynamic lexer token emission #96

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Merged
tinovyatkin merged 2 commits into from
Jul 17, 2026
Merged

Support dynamic lexer token emission #96

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8a4846a
Support dynamic lexer token emission
tinovyatkin Jul 17, 2026
adc3f40
Preserve lexer suffix after EOF rewind
tinovyatkin Jul 17, 2026
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6 changes: 5 additions & 1 deletion README.md
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Expand Up @@ -306,7 +306,11 @@ adapter (`MyParserHooks` plus `MyParserTypedHooks<T>`) that maps stable
manifest coordinates to named Rust methods. Lexer callers can use
`LexerSemCtx` with `atn::lexer::next_token_with_semantic_hooks` or the
compiled-DFA variant to route lexer predicates/actions through the same
`SemanticHooks` trait.
`SemanticHooks` trait. On the committed action path, `LexerSemCtx` exposes the
pending token type/channel, character lookahead and consumption, and mode
mutators. Actions can also queue a prefix token and advance the current token
start, allowing one lexer match to return multiple tokens while each
`TokenSource::next_token` call still appends exactly one token.

Generated lexers also own optional hook state and emit typed lexer adapters
when a semantic pattern maps lexer helper calls to hooks. The official
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