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// Copyright 2012-2013 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use std::io;
use syntax::ast;
use syntax::print::pp;
use syntax::print::pprust;
use syntax::parse::token;
use syntax::visit;
struct EachBindingVisitor<'self> {
f: &'self fn(&ast::Path, ast::NodeId)
}
impl<'self> visit::Visitor<()> for EachBindingVisitor<'self> {
fn visit_pat(&mut self, pat:@ast::Pat, _:()) {
match pat.node {
ast::PatIdent(_, ref path, _) => {
(self.f)(path, pat.id);
}
_ => {}
}
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.
pub fn with_pp(intr: @token::ident_interner,
cb: &fn(@pprust::ps, @io::Writer)) -> ~str {
do io::with_str_writer |writer| {
let pp = pprust::rust_printer(writer, intr);
cb(pp, writer);
pp::eof(pp.s);
}
}
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