feat(M6b): [] keepArray postfix + quoted-string step selector + trailing-; blocks#19
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Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
…fixes) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
…lector
i=1 in the path-handler string→name conversion; unblocks descendent-operator
case003/005 and quoted-selectors case002 (+3 official). Obscure ("x").y
paren-literal-head edge accepted (parser collapses the parens).
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Summary
M6b is the parser-syntax half of the M6 split — the
[]keepArray postfix plus two isolated parser fixes.[]keepArray — a trailing[]forces a path's final result to stay an array (suppresses the length-1 singleton unwrap). Faithful any-step rule: any step carrying[](incl. a nested predicated sub-path) keeps the path's final result an array — e.g.Phone[type="mobile"][].number→["077 7700 1234"](the[]is onPhone, before.number). Implemented as a recursivepath_keeps_arrayscan feeding the single path-branchfinalize_sequence; every other finalize caller is untouched, so the singleton-unwrap default is byte-identical..(and in first position) selects the named field (foo."bar"≡foo.bar), while a standalone/predicated string ("Red"[$$="Bus"]) stays a literal. Position-based, matching jsonata.;in a block —( a; b; )is now tolerated.Results
flattening(+9, incl. the deferred case041 which passes for free),quoted-selectors,object-constructor,hof-map,transform,descendent-operator, and ~10 more groups.Verification
Plan-grounding against the official cases caught a bug in the draft design (case037 disproved a "last-step" framing → corrected to the faithful any-step rule). An adversarial fidelity review vs the jsonata-js v2.2.1 oracle confirmed A-4 fully faithful,
*[]/**[]match, and a 24-path regression sweep is clean; it found one A-2 gap (first-position quoted strings) fixed inef953c3(which unblocked 3 more cases).Deferred/pre-existing (out of scope): the empty-array-vs-empty-object adapter ambiguity (
$type([])→"object", afrom_luaJSON-input limitation); the obscure("x").yparenthesized-literal-head edge.Test Plan
bustedfull unit suite — 464/464scripts/run-suite.sh— 1211/1682, zero regressions🤖 Generated with Claude Code