LPeg - stack overflow (too many runtime captures) with match time capture
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- Subject: LPeg - stack overflow (too many runtime captures) with match time capture
- From: leaf corcoran <leafot@...>
- Date: 2011年6月14日 21:33:35 -0700
I have a relatively simple contrived grammar (below) which works great
with small files.
When I try to feed it a large file though I get an error:
stack overflow (too many runtime captures)
This happens when it tries to read over about 8000 lines. Is there any
way to get around this limitation with match time captures? I am
considering making the grammar only process one line at a time and
handling the looping from Lua. Is this the best solution?
require "lpeg"
local R, S, V, P = lpeg.R, lpeg.S, lpeg.V, lpeg.P
local C, Ct, Cmt = lpeg.C, lpeg.Ct, lpeg.Cmt
local Break = S"\n"
local Name = R("az", "AZ", "__") * R("az", "AZ", "09", "__")^0
local Block, Line = V"Block", V"Line"
local count = 0
Name = Cmt(Name, function(str, pos, name)
count = count + 1
return true, name
end)
local g = lpeg.P{
Block,
Block = Ct(Line * (Break * Line)^0),
Line = Name,
}
local success, err = pcall(function()
local out = g:match(io.open("big.txt"):read("*a"))
print(#out)
end)
if not success then
print(err)
print("got", count)
end
Thanks, Leaf