ocaml-yamlx

A pure-OCaml YAML 1.2 and 1.1 library with a lossless, comment-preserving AST. Features: - Full YAML 1.2 compliance — passes all 371 tests from the yaml-test-suite. - Pure OCaml — no C bindings, no external runtime dependencies. - Lossless AST — the parsed node tree preserves scalar styles (plain, 'single-quoted', "double-quoted", | literal, > folded), flow vs. block collection style, tags, anchors, and source positions. - Best-effort comment preservation — standalone (head) comments before a node, inline (line) comments after a value, and trailing (foot) comments after the last item of a block collection are attached to the nearest node and re-emitted by the printer. - Pretty-printer — `Nodes.to_yaml` serializes a node list back to a YAML string, preserving all of the above. - Plain-YAML printer — `Nodes.to_plain_yaml_exn` produces a restricted subset with no anchors, no aliases (expanded inline), no tags, no flow collections, and no complex mapping keys — the fragment of YAML that most people recognize on sight. - Typed-value resolver — `Values.of_yaml` applies the YAML 1.2 JSON schema and returns value list with `Null | Bool | Int | Float | String | Seq | Map` constructors. - Multi-document streams — both the node and value APIs handle streams containing more than one ----separated document. - Correct anchor scoping — anchors are document-local; an alias in document N cannot refer to an anchor defined in document N−1. - Structured errors — `Scan_error` and `Parse_error` carry a pos record with line, column, and byte offset. `catch_errors` wraps any of these into a `(_, string)` result with a human-readable message, optionally prefixed with a file name. - Command-line tool — the yamlx binary reads YAML from a file or stdin and prints it in one of several formats.

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