- (list (concat "\\_<0\\([xX][0-9a-fA-F_]+\\|[0-7_]+\\)\\|"
- "\\_<[0-9][0-9_]*\\(\\.[0-9_]*\\|\\)"
- "\\([eE]\\([-+]\\|\\)[0-9_]+\\|[lL]\\|\\)")
+ (list (concat "\\_<0\\([xX][0-9a-fA-F]+\\|[oO]?[0-7]+\\|[bB][01]+\\)\\|"
+ "\\_<[0-9][0-9]*\\(\\.[0-9]*\\|\\)"
+ "\\([eE]\\([-+]\\|\\)[0-9]+\\|[lL]\\|\\)")