FA-47683 / Delimited text / Member archive

Literal doubled-comment records are filtered as comments · case 03

A structured table violates the declared record or column contract.

Member previewVariant 3 · 3 implementations · 10 checks per implementation

Case contract

Process already framed pipe records. Column-zero # starts a comment except ## encodes a literal leading # data record. A column-zero #!name=value directive sets a unique metadata name; malformed or duplicate directives reject. Other records, including leading-space # and empty records, are data. Return metadata and data rows.

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 marker	`[{}, []]`	`[{}, [["#literal", "cellcellcell"]]]`	Failed

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