lexer would hang on an empty file
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2e016bbe65
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d864e49f47
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@ -156,11 +156,12 @@ function lexer.scan (s,matches,filter,options)
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local line = 1
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local line = 1
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if file then
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if file then
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s = file:read()
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s = file:read()
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if not s then return nil end -- empty file
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if not s or s == '' then return nil end -- empty file
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s = s ..'\n'
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s = s ..'\n'
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end
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end
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local sz = #s
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local sz = #s
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local idx = 1
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local idx = 1
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if sz == 0 then return nil end -- empty file
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--print('sz',sz)
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--print('sz',sz)
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while true do
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while true do
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for _,m in ipairs(matches) do
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for _,m in ipairs(matches) do
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@ -39,6 +39,7 @@ function prettify.lua (file)
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local tok = lexer.lua(code,{},{})
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local tok = lexer.lua(code,{},{})
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local t,val = tok()
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local t,val = tok()
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if not t then return nil,"empty file" end
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while t do
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while t do
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val = escape(val)
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val = escape(val)
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if spans[t] then
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if spans[t] then
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