51 lines
799 B
Bash
51 lines
799 B
Bash
#!/bin/sh
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# vim: indentexpr= nosmartindent autoindent
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# vim: tabstop=2 shiftwidth=2 softtabstop=2
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# This regex was manually written, derived from the rules in UAX #29.
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# Particularly, from Table 1c, which lays out a regex for grapheme clusters.
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CR="\p{gcb=CR}"
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LF="\p{gcb=LF}"
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Control="\p{gcb=Control}"
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Prepend="\p{gcb=Prepend}"
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L="\p{gcb=L}"
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V="\p{gcb=V}"
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LV="\p{gcb=LV}"
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LVT="\p{gcb=LVT}"
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T="\p{gcb=T}"
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RI="\p{gcb=RI}"
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Extend="\p{gcb=Extend}"
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ZWJ="\p{gcb=ZWJ}"
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SpacingMark="\p{gcb=SpacingMark}"
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Any="\p{any}"
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ExtendPict="\p{Extended_Pictographic}"
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echo "(?x)
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$CR $LF
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$Control
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$Prepend*
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(
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(
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($L* ($V+ | $LV $V* | $LVT) $T*)
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$L+
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$T+
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)
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$RI $RI
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$ExtendPict ($Extend* $ZWJ $ExtendPict)*
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[^$Control $CR $LF]
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)
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[$Extend $ZWJ $SpacingMark]*
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$Any
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"
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