FA-48718 / Delimited text / Member archive

A field source span starts on its preceding delimiter · 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 simple unquoted comma record and return [value,start,end] for each field, using zero-based Unicode-code-point offsets and exclusive ends. Delimiters are outside field spans; empty fields have equal start/end positions. The input contains no record terminator.

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
normal	`[["ab", 0, 2], [",c", 2, 4]]`	`[["ab", 0, 2], ["c", 3, 4]]`	Failed

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