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authorGraydon Hoare <graydon@mozilla.com>2012-02-29 11:46:23 -0800
committerGraydon Hoare <graydon@mozilla.com>2012-03-02 18:46:13 -0800
commit87c14f1e3d85751bffffda0b1920be5e726172c4 (patch)
tree371d86e9a7c65b06df5c8f5e6d499cf4730324fc /src/comp/syntax/util
parent9228947fe15af96593abf4745d91802b56c205e8 (diff)
Move src/comp to src/rustc
Diffstat (limited to 'src/comp/syntax/util')
-rw-r--r--src/comp/syntax/util/interner.rs39
1 files changed, 0 insertions, 39 deletions
diff --git a/src/comp/syntax/util/interner.rs b/src/comp/syntax/util/interner.rs
deleted file mode 100644
index c7f0d7ecb99..00000000000
--- a/src/comp/syntax/util/interner.rs
+++ /dev/null
@@ -1,39 +0,0 @@
-// An "interner" is a data structure that associates values with uint tags and
-// allows bidirectional lookup; i.e. given a value, one can easily find the
-// type, and vice versa.
-import std::map;
-import std::map::{hashmap, hashfn, eqfn};
-
-type interner<T> =
-    {map: hashmap<T, uint>,
-     mutable vect: [T],
-     hasher: hashfn<T>,
-     eqer: eqfn<T>};
-
-fn mk<T: copy>(hasher: hashfn<T>, eqer: eqfn<T>) -> interner<T> {
-    let m = map::mk_hashmap::<T, uint>(hasher, eqer);
-    ret {map: m, mutable vect: [], 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);
-        itr.map.insert(val, new_idx);
-        itr.vect += [val];
-        ret new_idx;
-      }
-    }
-}
-
-// |get| isn't "pure" in the traditional sense, because it can go from
-// failing to returning a value as items are interned. But for typestate,
-// 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]
-    }
-}
-
-fn len<T>(itr: interner<T>) -> uint { ret vec::len(itr.vect); }