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use syntax::ast;
use syntax_pos::MultiSpan;
use util::nodemap::NodeMap;
use super::{Lint, LintId, EarlyLint, IntoEarlyLint};
#[derive(RustcEncodable, RustcDecodable)]
pub struct LintTable {
map: NodeMap<Vec<EarlyLint>>
}
impl LintTable {
pub fn new() -> Self {
LintTable { map: NodeMap() }
}
pub fn add_lint<S: Into<MultiSpan>>(&mut self,
lint: &'static Lint,
id: ast::NodeId,
sp: S,
msg: String)
{
self.add_lint_diagnostic(lint, id, (sp, &msg[..]))
}
pub fn add_lint_diagnostic<M>(&mut self,
lint: &'static Lint,
id: ast::NodeId,
msg: M)
where M: IntoEarlyLint,
{
let lint_id = LintId::of(lint);
let early_lint = msg.into_early_lint(lint_id);
let arr = self.map.entry(id).or_insert(vec![]);
if !arr.contains(&early_lint) {
arr.push(early_lint);
}
}
pub fn get(&self, id: ast::NodeId) -> &[EarlyLint] {
self.map.get(&id).map(|v| &v[..]).unwrap_or(&[])
}
pub fn take(&mut self, id: ast::NodeId) -> Vec<EarlyLint> {
self.map.remove(&id).unwrap_or(vec![])
}
pub fn transfer(&mut self, into: &mut LintTable) {
into.map.extend(self.map.drain());
}
pub fn get_any(&self) -> Option<(&ast::NodeId, &Vec<EarlyLint>)> {
self.map.iter()
.filter(|&(_, v)| !v.is_empty())
.next()
}
}