FA-48158 / Delimited text / Member archive

The second quote of an escaped pair is revisited as syntax · case 03

A structured table violates the declared record or column contract.

Member previewVariant 3 · 3 implementations · 8 checks per implementation

Case contract

Split a comma record with trailing comments. A # outside double quotes ends the record; inside quotes it is data. Quotes toggle quoted state and are removed; doubled quotes inside quotes emit one quote. Whitespace before a trailing comment is data. Unterminated quoting rejects.

Why this case matters

Delimited interchange needs explicit framing, schema and field semantics at ingestion and emission boundaries.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
escaped quote	`["a\""]`	`["a\"#b", "z"]`	Failed

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