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|
lex
{
ignore /space+/
literal '*', '(', ')', '!', ';\n'
token id /[a-zA-Z_0-9]+/
}
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* ';\n']
parse Start: start[ stdin ]
print( Start.tree "\n" )
|
