diff options
Diffstat (limited to 'tex/context/base/l-number.lua')
| -rw-r--r-- | tex/context/base/l-number.lua | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/tex/context/base/l-number.lua b/tex/context/base/l-number.lua index e463cb973..303355f78 100644 --- a/tex/context/base/l-number.lua +++ b/tex/context/base/l-number.lua @@ -8,3 +8,28 @@ if not versions then versions = { } end versions['l-number'] = 1.001 if not number then number = { } end +-- a,b,c,d,e,f = number.toset(100101) + +function number.toset(n) + return (tostring(n)):match("(.?)(.?)(.?)(.?)(.?)(.?)(.?)(.?)") +end + +-- the lpeg way is slower on 8 digits, but faster on 4 digits, some 7.5% +-- on +-- +-- for i=1,1000000 do +-- local a,b,c,d,e,f,g,h = number.toset(12345678) +-- local a,b,c,d = number.toset(1234) +-- local a,b,c = number.toset(123) +-- end +-- +-- of course dedicated "(.)(.)(.)(.)" matches are even faster + +do + local one = lpeg.C(1-lpeg.S(''))^1 + + function number.toset(n) + return lpeg.match(one,tostring(n)) + end +end + |