diff options
Diffstat (limited to 'lualibs-lpeg.lua')
| -rw-r--r-- | lualibs-lpeg.lua | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/lualibs-lpeg.lua b/lualibs-lpeg.lua index 399b3ad..6d3acd7 100644 --- a/lualibs-lpeg.lua +++ b/lualibs-lpeg.lua @@ -6,6 +6,10 @@ if not modules then modules = { } end modules ['l-lpeg'] = { license = "see context related readme files" } +-- lpeg 12 vs lpeg 10: slower compilation, similar parsing speed (i need to check +-- if i can use new features like capture / 2 and .B (at first sight the xml +-- parser is some 5% slower) + -- a new lpeg fails on a #(1-P(":")) test and really needs a + P(-1) -- move utf -> l-unicode @@ -15,14 +19,15 @@ lpeg = require("lpeg") -- The latest lpeg doesn't have print any more, and even the new ones are not -- available by default (only when debug mode is enabled), which is a pitty as --- as it helps bailign down bottlenecks. Performance seems comparable, although +-- as it helps nailign down bottlenecks. Performance seems comparable: some 10% +-- slower pattern compilation, same parsing speed, although, -- -- local p = lpeg.C(lpeg.P(1)^0 * lpeg.P(-1)) --- local a = string.rep("123",10) +-- local a = string.rep("123",100) -- lpeg.match(p,a) -- --- is nearly 20% slower and also still suboptimal (i.e. a match that runs from --- begin to end, one of the cases where string matchers win). +-- seems slower and is also still suboptimal (i.e. a match that runs from begin +-- to end, one of the cases where string matchers win). if not lpeg.print then function lpeg.print(...) print(lpeg.pcode(...)) end end @@ -74,7 +79,9 @@ local lpegtype, lpegmatch, lpegprint = lpeg.type, lpeg.match, lpeg.print -- let's start with an inspector: -setinspector(function(v) if lpegtype(v) then lpegprint(v) return true end end) +if setinspector then + setinspector(function(v) if lpegtype(v) then lpegprint(v) return true end end) +end -- Beware, we predefine a bunch of patterns here and one reason for doing so -- is that we get consistent behaviour in some of the visualizers. @@ -469,7 +476,7 @@ end -- local pattern1 = P(1-P(pattern))^0 * P(pattern) : test for not nil -- local pattern2 = (P(pattern) * Cc(true) + P(1))^0 : test for true (could be faster, but not much) -function lpeg.finder(lst,makefunction) -- beware: slower than find with 'patternless finds' +function lpeg.finder(lst,makefunction,isutf) -- beware: slower than find with 'patternless finds' local pattern if type(lst) == "table" then pattern = P(false) @@ -485,7 +492,12 @@ function lpeg.finder(lst,makefunction) -- beware: slower than find with 'pattern else pattern = P(lst) end - pattern = (1-pattern)^0 * pattern + if isutf then +-- pattern = ((utf8char or 1)-pattern)^0 * pattern + pattern = ((utf8char or 1)-pattern)^0 * pattern + else + pattern = (1-pattern)^0 * pattern + end if makefunction then return function(str) return lpegmatch(pattern,str) |