---

yaml
---
r: 4954
b: refs/heads/master
c: 4e136d1
h: refs/heads/master
v: v3

Author: brson

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 3aef2c1d7db86ff842796e9ea93acf8c09aac44c
+refs/heads/master: 4e136d1fd9bd5536d441c062d41e7b71b375a942

trunk/src/comp/middle/cstrcache.rs

@@ -0,0 +1,29 @@
+// Provides a safe way to get C pointers to strings, because in many
+// places LLVM wants a string but doesn't take a copy.
+
+import std::str;
+
+export t;
+export mk;
+export get_cstr;
+
+type t_ = @{
+    // This string is boxed so that I remember that it has to be boxed
+    // after the ivec conversion.
+    mutable cache: [@str]
+};
+
+tag t {
+    private(t_);
+}
+
+fn mk() -> t {
+    ret private(@{mutable cache: []});
+}
+
+fn get_cstr(t: &t, s: &str) -> str::rustrt::sbuf {
+    let boxed = @s;
+    let buf = str::buf(*boxed);
+    (*t).cache += [boxed];
+    ret buf;
+}

trunk/src/comp/rustc.rc

@@ -30,6 +30,7 @@ mod middle {
     mod freevars;
     mod shape;
     mod gc;
+    mod cstrcache;
 
     mod tstate {
         mod ck;