lpeg.Ct
Creates a table capture
Prototype
lpeg.Ct (patt)Description
This capture creates a table and puts all values from all anonymous captures made by patt inside this table in successive integer keys, starting at 1. Moreover, for each named capture group created by patt, the first value of the group is put into the table with the group name as its key. The captured value is only the table.
The following code splits a string using a given pattern sep as a separator:
If the split results in too many values, it may overflow the maximum number of values that can be returned by a Lua function. In this case, we should collect these values in a table:
function split (s, sep)
sep = lpeg.P(sep)
local elem = lpeg.C((1 - sep)^0)
local p = lpeg.Ct(elem * (sep * elem)^0) -- make a table capture
return lpeg.match(p, s)
end
The following code splits a string using a given pattern sep as a separator:
If the split results in too many values, it may overflow the maximum number of values that can be returned by a Lua function. In this case, we should collect these values in a table:
function split (s, sep)
sep = lpeg.P(sep)
local elem = lpeg.C((1 - sep)^0)
local p = lpeg.Ct(elem * (sep * elem)^0) -- make a table capture
return lpeg.match(p, s)
end
Lua functions
- lpeg.B - Matches patt n characters behind the current position, consuming no input
- lpeg.C - Creates a simple capture
- lpeg.Carg - Creates an argument capture
- lpeg.Cb - Creates a back capture
- lpeg.Cc - Creates a constant capture
- lpeg.Cf - Creates a fold capture
- lpeg.Cg - Creates a group capture
- lpeg.Cmt - Creates a match-time capture
- lpeg.Cp - Creates a position capture
- lpeg.Cs - Creates a substitution capture
- lpeg.locale - Returns a table of patterns matching the current locale
- lpeg.match - Matches a pattern against a string
- lpeg.P - Converts a value into a pattern
- lpeg.print - Outputs debugging information to stdout
- lpeg.R - Returns a pattern that matches a range of characters
- lpeg.S - Returns a pattern that matches a set of characters
- lpeg.setmaxstack - Sets the maximum size for the backtrack stack
- lpeg.type - Tests if a value is a pattern
- lpeg.V - Creates a non-terminal variable for a grammar
- lpeg.version - Returns the LPeg version