Directives apply to the document that follows, so the previous document
must be closed with an explicit '...' end marker before them. After an
implicit end, a '%YAML'/'%TAG'/reserved directive is now rejected instead
of being silently accepted. Also reject a '%YAML' version trailed directly
by '#' with no separating space ('%YAML 1.1#...'), since a comment needs
leading separation; libyaml accepts both.
This restores reject-side conformance the suite manifest recorded as
passing but the libyaml port had dropped (9HCY, EB22, MUS6/00, MUS6/01,
RHX7), and updates the two PureYAML gap-error fixtures whose rejection now
fires earlier and more precisely at the misplaced directive.
Refresh yaml-test-suite-manifest.yaml to version 3: whole-suite
conformance is 384/402 (up from the recorded 331); 53 cases still marked
as gaps now pass, none regress.
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.
YAML 1.2 §6.8.1 requires a reserved directive (anything other than %YAML
or %TAG) to be ignored with a warning, and a document whose minor version
is newer than 1.2 to be parsed with a warning. libyaml rejects both. The
scanner now drops a reserved directive's whole line and emits no token,
and the parser accepts any major-version-1 document.
Canonical event conformance: 253 -> 258 of 308 (2LFX, 6LVF, MUS6/05,
MUS6/06, BEC7). 333 tests pass.
Adds the %YAML and %TAG directive scanner, the final scanner piece.
Ports fetch_directive, scan_directive, scan_directive_name,
scan_version_directive_value/number, and scan_tag_directive_value,
reusing the already-ported tag handle/URI scanners. Adds
versionDirective and tagDirective token kinds.
The libyaml scanner is now fully ported: stream, document markers,
directives, block + flow structure, plain/quoted/block scalars,
anchors, aliases, and tags. 319 tests, no regression.
