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Add a KleeneOp enum for clarity

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This commit is contained in:
Brendan Zabarauskas
2014-10-23 11:24:20 +11:00
parent 34dacb80ce
commit 94d6eee335
6 changed files with 42 additions and 30 deletions
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9
src/libsyntax/print/pprust.rs
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@@ -1037,20 +1037,23 @@ impl<'a> State<'a> {
_ => Ok(())
}
}
ast::TtSequence(_, ref tts, ref sep, zerok) => {
ast::TtSequence(_, ref tts, ref separator, kleene_op) => {
try!(word(&mut self.s, "$("));
for tt_elt in (*tts).iter() {
try!(self.print_tt(tt_elt));
}
try!(word(&mut self.s, ")"));
match *sep {
match *separator {
Some(ref tk) => {
try!(word(&mut self.s,
parse::token::to_string(tk).as_slice()));
}
None => ()
}
word(&mut self.s, if zerok { "*" } else { "+" })
match kleene_op {
ast::ZeroOrMore => word(&mut self.s, "*"),
ast::OneOrMore => word(&mut self.s, "+"),
}
}
ast::TtNonterminal(_, name) => {
try!(word(&mut self.s, "$"));