librustc: Make the compiler ignore purity.

For bootstrapping purposes, this commit does not remove all uses of
the keyword "pure" -- doing so would cause the compiler to no longer
bootstrap due to some syntax extensions ("deriving" in particular).
Instead, it makes the compiler ignore "pure". Post-snapshot, we can
remove "pure" from the language.

There are quite a few (~100) borrow check errors that were essentially
all the result of mutable fields or partial borrows of `@mut`. Per
discussions with Niko I think we want to allow partial borrows of
`@mut` but detect obvious footguns. We should also improve the error
message when `@mut` is erroneously reborrowed.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/libsyntax/ext/pipes/liveness.rs b/src/libsyntax/ext/pipes/liveness.rs
index 15ba7f95538..c6fdf4d9c1b 100644
--- a/src/libsyntax/ext/pipes/liveness.rs
+++ b/src/libsyntax/ext/pipes/liveness.rs
@@ -91,7 +91,7 @@ pub fn analyze(proto: protocol, _cx: @ext_ctxt) {
         let states = str::connect(self_live.map(|s| copy s.name), ~" ");
 
         debug!("protocol %s is unbounded due to loops involving: %s",
-               proto.name, states);
+               copy proto.name, states);
 
         // Someday this will be configurable with a warning
         //cx.span_warn(empty_span(),
@@ -103,7 +103,7 @@ pub fn analyze(proto: protocol, _cx: @ext_ctxt) {
         proto.bounded = Some(false);
     }
     else {
-        debug!("protocol %s is bounded. yay!", proto.name);
+        debug!("protocol %s is bounded. yay!", copy proto.name);
         proto.bounded = Some(true);
     }
 }