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|
lex
ignore /space+/
literal `* `( `) `!
token SEMI_NL /';\n'/
token id /[a-zA-Z_0-9]+/
end
def item
[id]
{
lhs = cons item ["( " ^r1 " )"]
}
| [`( item* `)]
{
lhs = cons item ["( " ^r2 " )"]
}
def A
[] {
print( 'A\n' )
}
def B
[] {
print( 'B\n' )
}
def start
[A item* `!]
| [B item* SEMI_NL]
parse Start: start[ stdin ]
print( Start, "\n" )
##### IN #####
a b c ( d1 d2 ) e f g ;
##### EXP #####
A
B
( a )( b )( c )( ( d1 )( d2 ) )( e )( f )( g );
|