NAME  foo$|bar

NAME  (?x: foo$ | bar )

NAME (?x: foo | bar )$

NAME  foo$|bar

NAME  (?x: foo$ | bar )

NAME  (?x: foo$| bar )

(?x: foo$ | bar )

(?x: foo$| bar )

NAME  bar|foo$

NAME  (bar|foo)$

NAME  bar|foo$

x{NAME}y       /* Some action */

xbar|foo"$"y   /* Some action */

x{NAME}        /* Some action */

xbar|foo$      /* Some action */

(xbar|foo)$    /* Some action */