semantic-lex-number

semantic-lex-number is a variable defined in `lex.el'.
Its value is

((looking-at semantic-lex-number-expression)
 (semantic-lex-push-token
  (semantic-lex-token 'number
		      (match-beginning 0)
		      (match-end 0))))

Documentation:
Detect and create number tokens.
See `semantic-lex-number-expression' for details on matching numbers,
and number formats.