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Diffstat (limited to 'tex/context/base/util-str.lua')
| -rw-r--r-- | tex/context/base/util-str.lua | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/tex/context/base/util-str.lua b/tex/context/base/util-str.lua index 89d8bb48d..2739a20c4 100644 --- a/tex/context/base/util-str.lua +++ b/tex/context/base/util-str.lua @@ -1094,3 +1094,23 @@ end -- string.formatteds = formatteds -- -- setmetatable(formatteds, { __index = make, __call = use }) + +-- This is a somewhat silly one used in commandline reconstruction but the older +-- method, using a combination of fine, gsub, quoted and unquoted was not that +-- reliable. +-- +-- '"foo"bar \"and " whatever"' => "foo\"bar \"and \" whatever" +-- 'foo"bar \"and " whatever' => "foo\"bar \"and \" whatever" + +local dquote = patterns.dquote -- P('"') +local equote = patterns.escaped + dquote / '\\"' + 1 +local space = patterns.space +local cquote = Cc('"') + +local pattern = + Cs(dquote * (equote - P(-2))^0 * dquote) -- we keep the outer but escape unescaped ones + + Cs(cquote * (equote - space)^0 * space * equote^0 * cquote) -- we escape unescaped ones + +function string.optionalquoted(str) + return lpegmatch(pattern,str) or str +end |