Add parseLocated / parseStreamLocated, returning a Model.LocatedValue
tree parallel in shape to Value, where every node carries its source
span (1-based line/column) and located children. Collections span from
their opening to closing event; scalars carry a start-anchored span;
aliases and merge-inherited pairs honestly point at their reference site.
The plain Value, its equality, and the conformance oracle are untouched:
locations are built only when the streaming composer is asked for them
(tracksLocations), behind new entry points, so the default value path is
byte-identical. A whole-suite test proves the located projection equals
a plain parse for every passing case (402/402), including through merge
keys and aliases, and the canonical-event and gap gates stay green.
Routes the value and stream APIs through the ported scanner+parser (the
event API already was), so PureYAML now parses entirely on the libyaml
port. Adds the features needed to match and exceed the previous engine:
JSON UTF-16 surrogate-pair \u escapes, bare documents after an explicit
`...`, reserved-directive handling that still requires a following `---`,
and a 64-level nesting bound enforced on the event stream so deeply nested
input fails with nestingTooDeep instead of overflowing a recursive
consumer. Parser errors are translated to the diagnostic-aware ParseError,
recovering precise codes where identifiable and a readable malformed
fallback otherwise; error-reporting fixtures are rebased onto the port.
Canonical event conformance: 268 -> 271 of 308 (7Z25, HWV9, QT73).
393 tests pass.
parseEvents now runs on the ported scanner+parser instead of the
hand-rolled approximation. Adds 1-based mark conversion at the boundary
(the port stays faithfully 0-based internally), translates the port's
scanner and parser errors into the diagnostic-aware ParseError with
precise codes (unterminatedQuotedString, unterminatedTag, tabIndentation)
and a readable malformed fallback, and retargets the canonical event gate
to track the port's gap set.
The port matches the canonical test.event on 253 of 308 valid cases;
the remaining gaps match libyaml's own behaviour and are the targets for
surpassing libyaml. Golden event and diagnostic expectations are rebased
onto the port where it is faithful or more correct (resolved verbatim
tags, libyaml's stream-end marks, reaching the real unterminated quote).
333 tests pass.
Add structured validation diagnostics, JSON and Yams comparison gates, and lazy token/event parsing so production behavior is measured without retaining full intermediate parser arrays.
Add internal parsing events with marks, scalar styles, collection styles, alias events, and anchor/tag metadata. Add golden parser event tests for current block parser behavior.
Closes#2
