package parseff

0.2.0

• Unified *1 variants into base combinators with ~at_least parameter. many1 → many ~at_least:1, take_while1 → take_while ~at_least:1, sep_by1 → sep_by ~at_least:1, end_by1 → end_by ~at_least:1, whitespace1 → whitespace ~at_least:1. The ~at_least parameter generalizes beyond the binary zero-vs-one distinction (e.g., many ~at_least:3 requires at least three matches). The old chainl1 and chainr1 were also removed in favor of making the default argument optional (see next item).
• Renamed chainl/chainr to fold_left/fold_right with ~otherwise. chainl1 p op → fold_left p op, chainl p op default → fold_left p op ~otherwise:default, and likewise for chainr/fold_right. The new names better describe what the combinators do (parse and fold with associativity) and align with OCaml's List.fold_left/List.fold_right naming conventions. The ~otherwise labeled argument replaces the old positional default parameter, providing a fallback value when zero elements match.

0.1.0

Initial release of Parseff -- a direct-style parser combinator library for OCaml 5 powered by algebraic effects.

• Direct-style parsers as plain unit -> 'a functions, no monadic or binding operators needed
• Algebraic effects for control flow, backtracking, and streaming input
• Typed errors via polymorphic variants with position tracking
• Built-in error variants: `Expected, `Unexpected_end_of_input, `Depth_limit_exceeded
• Automatic backtracking with or_, one_of, and one_of_labeled
• Primitive parsers: consume, satisfy, char, match_regex, take_while, skip_while, fail, error
• Repetition combinators: many, sep_by, between, end_by, count, optional
• Operator chains: fold_left, fold_right for expression parsing
• Look-ahead parsing and depth-limited recursion via rec_ (default depth: 128)
• Convenience parsers: digit, letter, alphanum, whitespace, any_char
• Zero-copy span APIs: take_while_span, sep_by_take_span returning { buf; off; len } records
• Fused operations for hot paths: sep_by_take, fused_sep_take, skip_while_then_char
• Streaming support via Source.of_string, Source.of_channel, Source.of_function
• Backtrack-across-chunk-boundary support for streaming sources
• Non-fatal diagnostics with warn / warn_at, rolled back on backtracking
• parse_until_end / parse_source_until_end runners that collect diagnostics
• Error labeling with expect and one_of_labeled for clear error messages
• Domain-safe: no global mutable state, independent parses run in parallel across OCaml 5 domains
• 2-4x faster than Angstrom and MParser on equivalent parsers
• Single runtime dependency: re for regex support