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auto merge of #8623 : pnkfelix/rust/fsk-visitor-vpar-defaults-step4, r=nmatsakis

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Follow up to #8619 (step 3 of 5).

(See #8527, which was step 1 of 5, for the full outline.)

Part of #7081.
This commit is contained in:
bors 2013-08-19 15:02:07 -07:00
commit e6e678fac7
8 changed files with 314 additions and 217 deletions
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29
src/librusti/utils.rs
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@ -13,24 +13,31 @@ use syntax::ast;
use syntax::print::pp;
use syntax::print::pprust;
use syntax::parse::token;
use syntax::visit;
pub fn each_binding(l: @ast::Local, f: @fn(&ast::Path, ast::NodeId)) {
use syntax::oldvisit;
struct EachBindingVisitor {
f: @fn(&ast::Path, ast::NodeId)
}
let vt = oldvisit::mk_simple_visitor(
@oldvisit::SimpleVisitor {
visit_pat: |pat| {
impl visit::Visitor<()> for EachBindingVisitor {
fn visit_pat(&mut self, pat:@ast::pat, _:()) {
match pat.node {
ast::pat_ident(_, ref path, _) => {
f(path, pat.id);
(self.f)(path, pat.id);
}
_ => {}
}
},
.. *oldvisit::default_simple_visitor()
}
);
(vt.visit_pat)(l.pat, ((), vt));
visit::walk_pat(self, pat, ());
}
}
pub fn each_binding(l: @ast::Local, f: @fn(&ast::Path, ast::NodeId)) {
use syntax::visit::Visitor;
let mut vt = EachBindingVisitor{ f: f };
vt.visit_pat(l.pat, ());
}
/// A utility function that hands off a pretty printer to a callback.