#!/bin/sh cp syntax.txt syntax.html sam -d syntax.html <<'!' ,s/\&/\&/g ,s//\>/g ,s!== (([^()]|$[^()]*$)*)!≡ \1!g ,s!«!

!g
,s!»!

!g ,s! vim$! VIM!g ,s! pcre$! PCRE!g ,s! perl$! PERL!g ,x g/NOT SUPPORTED/ s!^[^ ]+!&! ,s!NOT SUPPORTED!!g ,s!(^[^ ]+) (.*)\n!\1\2\n!g ,s!.*:$!&!g ,s!^$!!g ,x v// s!.*!&! 1,2c RE2 regular expression syntax reference

RE2 regular expression syntax reference

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This page lists the regular expression syntax accepted by RE2.
It also lists syntax accepted by PCRE, PERL, and VIM.
Grayed out expressions are not supported by RE2.

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