rx-constituents

rx-constituents is a variable defined in `rx.el'.
Its value is shown below.

Documentation:
Alist of sexp form regexp constituents.
Each element of the alist has the form (SYMBOL . DEFN).
SYMBOL is a valid constituent of sexp regular expressions.
If DEFN is a string, SYMBOL is translated into DEFN.
If DEFN is a symbol, use the definition of DEFN, recursively.
Otherwise, DEFN must be a list (FUNCTION MIN-ARGS MAX-ARGS PREDICATE).
FUNCTION is used to produce code for SYMBOL. MIN-ARGS and MAX-ARGS
are the minimum and maximum number of arguments the function-form
sexp constituent SYMBOL may have in sexp regular expressions.
MAX-ARGS nil means no limit. PREDICATE, if specified, means that
all arguments must satisfy PREDICATE.

Value:

((and rx-and 1 nil)
 (seq . and)
 (: . and)
 (sequence . and)
 (or rx-or 1 nil)
 (| . or)
 (not-newline . ".")
 (nonl . not-newline)
 (anything rx-anything 0 nil)
 (any rx-any 1 nil rx-check-any)
 (any . ".")
 (in . any)
 (char . any)
 (not-char rx-not-char 1 nil rx-check-any)
 (not rx-not 1 1 rx-check-not)
 (repeat rx-repeat 2 nil)
 (= rx-= 2 nil)
 (>= rx->= 2 nil)
 (** rx-** 2 nil)
 (submatch rx-submatch 1 nil)
 (group . submatch)
 (submatch-n rx-submatch-n 2 nil)
 (group-n . submatch-n)
 (zero-or-more rx-kleene 1 nil)
 (one-or-more rx-kleene 1 nil)
 (zero-or-one rx-kleene 1 nil)
 (\? . zero-or-one)
 (\?\? . zero-or-one)
 (* . zero-or-more)
 (*\? . zero-or-more)
 (0+ . zero-or-more)
 (+ . one-or-more)
 (+\? . one-or-more)
 (1+ . one-or-more)
 (optional . zero-or-one)
 (opt . zero-or-one)
 (minimal-match rx-greedy 1 1)
 (maximal-match rx-greedy 1 1)
 (backref rx-backref 1 1 rx-check-backref)
 (line-start . "^")
 (bol . line-start)
 (line-end . "$")
 (eol . line-end)
 (string-start . "\\`")
 (bos . string-start)
 (bot . string-start)
 (string-end . "\\'")
 (eos . string-end)
 (eot . string-end)
 (buffer-start . "\\`")
 (buffer-end . "\\'")
 (point . "\\=")
 (word-start . "\\<")
 (bow . word-start)
 (word-end . "\\>")
 (eow . word-end)
 (word-boundary . "\\b")
 (not-word-boundary . "\\B")
 (symbol-start . "\\_<")
 (symbol-end . "\\_>")
 (syntax rx-syntax 1 1)
 (not-syntax rx-not-syntax 1 1)
 (category rx-category 1 1 rx-check-category)
 (eval rx-eval 1 1)
 (regexp rx-regexp 1 1 stringp)
 (regex . regexp)
 (digit . "[[:digit:]]")
 (numeric . digit)
 (num . digit)
 (control . "[[:cntrl:]]")
 (cntrl . control)
 (hex-digit . "[[:xdigit:]]")
 (hex . hex-digit)
 (xdigit . hex-digit)
 (blank . "[[:blank:]]")
 (graphic . "[[:graph:]]")
 (graph . graphic)
 (printing . "[[:print:]]")
 (print . printing)
 (alphanumeric . "[[:alnum:]]")
 (alnum . alphanumeric)
 (letter . "[[:alpha:]]")
 (alphabetic . letter)
 (alpha . letter)
 (ascii . "[[:ascii:]]")
 (nonascii . "[[:nonascii:]]")
 (lower . "[[:lower:]]")
 (lower-case . lower)
 (punctuation . "[[:punct:]]")
 (punct . punctuation)
 (space . "[[:space:]]")
 (whitespace . space)
 (white . space)
 (upper . "[[:upper:]]")
 (upper-case . upper)
 (word . "[[:word:]]")
 (wordchar . word)
 (not-wordchar . "\\W"))