OpenE2K/rust
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

port interner to use dvec

Browse Source
This commit is contained in:
Niko Matsakis 2012-05-15 13:40:01 -07:00
parent b8418da1b6
commit de1513f26a
1 changed files with 7 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
src/librustsyntax/util/interner.rs
View File

@ -3,25 +3,26 @@
// type, and vice versa.
import std::map;
import std::map::{hashmap, hashfn, eqfn};
import dvec::{dvec, extensions};
type interner<T> =
{map: hashmap<T, uint>,
mut vect: [T],
vect: dvec<T>,
hasher: hashfn<T>,
eqer: eqfn<T>};
fn mk<T: copy>(hasher: hashfn<T>, eqer: eqfn<T>) -> interner<T> {
let m = map::hashmap::<T, uint>(hasher, eqer);
ret {map: m, mut vect: [], hasher: hasher, eqer: eqer};
ret {map: m, vect: dvec(), hasher: hasher, eqer: eqer};
}
fn intern<T: copy>(itr: interner<T>, val: T) -> uint {
alt itr.map.find(val) {
some(idx) { ret idx; }
none {
let new_idx = vec::len::<T>(itr.vect);
let new_idx = itr.vect.len();
itr.map.insert(val, new_idx);
itr.vect += [val];
itr.vect.push(val);
ret new_idx;
}
}
@ -32,8 +33,8 @@ fn intern<T: copy>(itr: interner<T>, val: T) -> uint {
// where we first check a pred and then rely on it, ceasing to fail is ok.
pure fn get<T: copy>(itr: interner<T>, idx: uint) -> T {
unchecked {
itr.vect[idx]
itr.vect.get_elt(idx)
}
}
fn len<T>(itr: interner<T>) -> uint { ret vec::len(itr.vect); }
fn len<T>(itr: interner<T>) -> uint { ret itr.vect.len(); }