FA-79965 / Typography line breaking / Member archive

Consecutive hyphen limit: final word protection · case 05

The paragraph's last word is split across lines.

Member previewVariant 5 · 3 implementations · 8 checks per implementation

Case contract

Input [words as syllable lists, width, limit]. Greedy fill with 1-unit spaces and characters. A word that does not fit may be split at the latest syllable boundary whose head plus "-" fits, only if fewer than limit immediately preceding lines ended in a hyphen and the word is not the paragraph's last word. A line ended without hyphen resets the streak; a word too long for an empty line is set alone. Return the lines.

Why this case matters

Line breaking decides where paragraphs wrap on screen and in print; a wrong decision point shifts every following line.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
regression: final word protection	`["hyphena-", "tion hy-", "phenation", "leading", "breaking", "of text a", "justified", "justified", "to compo-", "sition"]`	`["hyphena-", "tion hy-", "phenation", "leading", "breaking", "of text a", "justified", "justified", "to", "composition"]`	Failed

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