FA-48188 / Delimited text / Member archive

An explicit empty variadic cell is omitted · case 03

A structured table violates the declared record or column contract.

Member previewVariant 3 · 3 implementations · 7 checks per implementation

Case contract

Bind a parsed comma row to an exact schema [head, ..., tail] where the middle ... captures zero or more fields as a list. The first and last physical cells bind head and tail; at least two cells are required. The rest list preserves empty cells and order.

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
empty rest	`{"head": "a", "rest": [], "tail": "z"}`	`{"head": "a", "rest": [""], "tail": "z"}`	Failed

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