lpeg.S
Returns a pattern that matches a set of characters
Prototype
lpeg.S (string)Description
Returns a pattern that matches any single character that appears in the given string. (The S stands for Set.)
As an example, the pattern lpeg.S("+-*/") matches any arithmetic operator.
Note that, if the argument is a single character (that is, a string of length 1), then lpeg.P(s) is equivalent to lpeg.S(s) which is equivalent to lpeg.R(s..s). Note also that both lpeg.S("") and lpeg.R() are patterns that always fail.
As an example, the pattern lpeg.S("+-*/") matches any arithmetic operator.
Note that, if the argument is a single character (that is, a string of length 1), then lpeg.P(s) is equivalent to lpeg.S(s) which is equivalent to lpeg.R(s..s). Note also that both lpeg.S("") and lpeg.R() are patterns that always fail.
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.Ct - Creates a table 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.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