diff options
Diffstat (limited to 'luaextra-aux.lua')
| -rw-r--r-- | luaextra-aux.lua | 38 |
1 files changed, 23 insertions, 15 deletions
diff --git a/luaextra-aux.lua b/luaextra-aux.lua index 1ff5c08..7950a03 100644 --- a/luaextra-aux.lua +++ b/luaextra-aux.lua @@ -6,19 +6,30 @@ if not modules then modules = { } end modules ['l-aux'] = { license = "see context related readme files" } +-- for inline, no store split : for s in string.gmatch(str,",* *([^,]+)") do .. end + aux = aux or { } local concat, format, gmatch = table.concat, string.format, string.gmatch local tostring, type = tostring, type local lpegmatch = lpeg.match +local P, R, V = lpeg.P, lpeg.R, lpeg.V + +local escape, left, right = P("\\"), P('{'), P('}') + +lpeg.patterns.balanced = P { + [1] = ((escape * (left+right)) + (1 - (left+right)) + V(2))^0, + [2] = left * V(1) * right +} + local space = lpeg.P(' ') local equal = lpeg.P("=") local comma = lpeg.P(",") local lbrace = lpeg.P("{") local rbrace = lpeg.P("}") local nobrace = 1 - (lbrace+rbrace) -local nested = lpeg.P{ lbrace * (nobrace + lpeg.V(1))^0 * rbrace } +local nested = lpeg.P { lbrace * (nobrace + lpeg.V(1))^0 * rbrace } local spaces = space^0 local value = lpeg.P(lbrace * lpeg.C((nobrace + nested)^0) * rbrace) + lpeg.C((nested + (1-comma))^0) @@ -98,6 +109,8 @@ local pattern = lpeg.Ct(value*(separator*value)^0) aux.settings_to_array_pattern = pattern +-- we could use a weak table as cache + function aux.settings_to_array(str) if not str or str == "" then return { } @@ -182,21 +195,14 @@ end -- temporary here -local digit = lpeg.R("09") -local period = lpeg.P(".") -local zero = lpeg.P("0") - ---~ local finish = lpeg.P(-1) ---~ local nodigit = (1-digit) + finish ---~ local case_1 = (period * zero^1 * #nodigit)/"" -- .000 ---~ local case_2 = (period * (1-(zero^0/"") * #nodigit)^1 * (zero^0/"") * nodigit) -- .010 .10 .100100 - +local digit = lpeg.R("09") +local period = lpeg.P(".") +local zero = lpeg.P("0") local trailingzeros = zero^0 * -digit -- suggested by Roberto R -local case_1 = period * trailingzeros / "" -local case_2 = period * (digit - trailingzeros)^1 * (trailingzeros / "") - -local number = digit^1 * (case_1 + case_2) -local stripper = lpeg.Cs((number + 1)^0) +local case_1 = period * trailingzeros / "" +local case_2 = period * (digit - trailingzeros)^1 * (trailingzeros / "") +local number = digit^1 * (case_1 + case_2) +local stripper = lpeg.Cs((number + 1)^0) --~ local sample = "bla 11.00 bla 11 bla 0.1100 bla 1.00100 bla 0.00 bla 0.001 bla 1.1100 bla 0.100100100 bla 0.00100100100" --~ collectgarbage("collect") @@ -205,6 +211,8 @@ local stripper = lpeg.Cs((number + 1)^0) --~ lpegmatch(stripper,str) --~ print(#str, os.clock()-ts, lpegmatch(stripper,sample)) +lpeg.patterns.strip_zeros = stripper + function aux.strip_zeros(str) return lpegmatch(stripper,str) end |