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// Copyright 2012-2015 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 rustc::hir::intravisit::{Visitor, NestedVisitorMap};
use index_builder::EntryBuilder;
use schema::*;
use rustc::hir;
use rustc::ty;
#[derive(RustcEncodable, RustcDecodable)]
pub struct Ast<'tcx> {
pub body: Lazy<hir::Body>,
pub tables: Lazy<ty::TypeckTables<'tcx>>,
pub nested_bodies: LazySeq<hir::Body>,
pub rvalue_promotable_to_static: bool,
}
impl_stable_hash_for!(struct Ast<'tcx> {
body,
tables,
nested_bodies,
rvalue_promotable_to_static
});
impl<'a, 'b, 'tcx> EntryBuilder<'a, 'b, 'tcx> {
pub fn encode_body(&mut self, body_id: hir::BodyId) -> Lazy<Ast<'tcx>> {
let body = self.tcx.hir.body(body_id);
let lazy_body = self.lazy(body);
let tables = self.tcx.body_tables(body_id);
let lazy_tables = self.lazy(tables);
let mut visitor = NestedBodyCollector {
tcx: self.tcx,
bodies_found: Vec::new(),
};
visitor.visit_body(body);
let lazy_nested_bodies = self.lazy_seq_ref_from_slice(&visitor.bodies_found);
let rvalue_promotable_to_static =
self.tcx.rvalue_promotable_to_static.borrow()[&body.value.id];
self.lazy(&Ast {
body: lazy_body,
tables: lazy_tables,
nested_bodies: lazy_nested_bodies,
rvalue_promotable_to_static: rvalue_promotable_to_static
})
}
}
struct NestedBodyCollector<'a, 'tcx: 'a> {
tcx: ty::TyCtxt<'a, 'tcx, 'tcx>,
bodies_found: Vec<&'tcx hir::Body>,
}
impl<'a, 'tcx: 'a> Visitor<'tcx> for NestedBodyCollector<'a, 'tcx> {
fn nested_visit_map<'this>(&'this mut self) -> NestedVisitorMap<'this, 'tcx> {
NestedVisitorMap::None
}
fn visit_nested_body(&mut self, body: hir::BodyId) {
let body = self.tcx.hir.body(body);
self.bodies_found.push(body);
self.visit_body(body);
}
}
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