(List
  (Case to_match={[ComSub (Com redirects=[(DescriptorRedirectNode target={[LIT_CHARS 1]} <REDIR_GREATAND "2>&"> 2)]{[LIT_CHARS getopts]} {[SQ <LIT_CHARS "[-]">]} {[LIT_CHARS opt]} {[DQ [LIT_CHARS "--???man"]]})]}, pat_word_list=[[{[LIT_VAR_LIKE "version="] [LIT_OTHER "["] [LIT_CHARS 0-9] [LIT_OTHER "]"] [LIT_OTHER "*"] =}], [{[LIT_OTHER "*"]}]]
    (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('usage', {[SQ <LIT_CHARS "[-?@(#)yes (AT&T Labs Research) 2012-06-06\\n]\n"> <LIT_CHARS "\t">] [VarSub USAGE_LICENSE] [SQ <LIT_CHARS "\n"> <LIT_CHARS "\t[+NAME?yes - repeatedly out a string until killed]\n"> <LIT_CHARS "\t[+DESCRIPTION?\\byes\\b repeatedly writes \\astring\\a to standard\n"> <LIT_CHARS "\t\toutput, followed by a \\anewline\\a character, until it\n"> <LIT_CHARS "\t\tis terminated.  If \\astring\\a is omitted then\n"> <LIT_CHARS "\t\tthen \\by\\b is used.]\n"> <LIT_CHARS "\n"> <LIT_CHARS "\t[string]\n"> <LIT_CHARS "\n"> <LIT_CHARS "\t[+EXIT STATUS?]{\n"> <LIT_CHARS "       \t\t [+0?Success.]\n"> <LIT_CHARS "       \t\t [+>0?An error occurred.]\n"> <LIT_CHARS "\t}\n"> <LIT_CHARS "\t">]})])
    (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('usage', {[SQ ]})])
  )
  (While
    (Com {[LIT_CHARS getopts]} {[DQ [VarSub usage]]} {[LIT_CHARS var]})
    (Case to_match={[VarSub var]}, pat_word_list=[]
    )
  )
  (Com {[LIT_CHARS shift]} {[ArithSub {A2 AS_OP_MINUS {A Atom NODE_ARITH_WORD {[VarSub OPTIND]}} {A Atom NODE_ARITH_WORD {[AS_NUM_LITERAL 1]}}}]})
  (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('string', {[VarSub @ test_op=VS_TEST_HYPHEN {[LIT_CHARS y]}]})])
  (Case to_match={[VarSub KSH_VERSION]}, pat_word_list=[[{[SQ ]}], [{[LIT_OTHER "*"]}]]
    (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('echo', {[LIT_CHARS echo]})])
    (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('echo', {[DQ [LIT_CHARS "print -r --"]]})])
  )
  (While
    (Com {[LIT_OTHER ":"]})
    (Com {[VarSub echo]} {[DQ [VarSub string]]})
  )
)