FA-80838 / Bidirectional text layout / Member archive

Paragraph separation and direction: strong character test · case 03

Paragraphs starting with digits or punctuation are forced LTR.

Member previewVariant 3 · 3 implementations · 8 checks per implementation

Case contract

Input [text, default level]. Paragraph separators (\n, \r, U+2029; \r\n counts once) end a paragraph and stay with it. A trailing non-empty remainder is a paragraph. Each paragraph takes level 1 if its first letter is uppercase (stand-in for RTL), 0 if lowercase, else the default. Return [[paragraph, level]].

Why this case matters

Mixed right-to-left and left-to-right text must resolve levels and visual order exactly, or words, numbers and carets land in the wrong place.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
regression: strong character test	`[["2X1aXb 2!Z2,\r", 0], ["X", 1]]`	`[["2X1aXb 2!Z2,\r", 1], ["X", 1]]`	Failed

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