librustc: De-`@mut` `ScopeInfo`

src/librustc/middle/trans/base.rs

@@ -1005,7 +1005,7 @@ pub fn have_cached_lpad(bcx: @Block) -> bool {
     return res;
 }
 
-pub fn in_lpad_scope_cx(bcx: @Block, f: |si: &mut ScopeInfo|) {
+pub fn in_lpad_scope_cx(bcx: @Block, f: |si: &ScopeInfo|) {
     let mut bcx = bcx;
     let mut cur_scope = bcx.scope.get();
     loop {
@@ -1191,7 +1191,7 @@ pub fn trans_stmt(cx: @Block, s: &ast::Stmt) -> @Block {
 // next three functions instead.
 pub fn new_block(cx: @FunctionContext,
                  parent: Option<@Block>,
-                 scope: Option<@mut ScopeInfo>,
+                 scope: Option<@ScopeInfo>,
                  is_lpad: bool,
                  name: &str,
                  opt_node_info: Option<NodeInfo>)
@@ -1216,9 +1216,10 @@ pub fn new_block(cx: @FunctionContext,
     }
 }
 
-pub fn simple_block_scope(parent: Option<@mut ScopeInfo>,
-                          node_info: Option<NodeInfo>) -> @mut ScopeInfo {
-    @mut ScopeInfo {
+pub fn simple_block_scope(parent: Option<@ScopeInfo>,
+                          node_info: Option<NodeInfo>)
+                          -> @ScopeInfo {
+    @ScopeInfo {
         parent: parent,
         loop_break: None,
         loop_label: None,
@@ -1248,7 +1249,7 @@ pub fn loop_scope_block(bcx: @Block,
                         loop_label: Option<Name>,
                         n: &str,
                         opt_node_info: Option<NodeInfo>) -> @Block {
-    return new_block(bcx.fcx, Some(bcx), Some(@mut ScopeInfo {
+    return new_block(bcx.fcx, Some(bcx), Some(@ScopeInfo {
         parent: None,
         loop_break: Some(loop_break),
         loop_label: loop_label,
@@ -1329,7 +1330,7 @@ pub fn cleanup_and_leave(bcx: @Block,
             cur_scope = match cur_scope {
                 Some (inf) if !inf.empty_cleanups() => {
                     let (sub_cx, dest, inf_cleanups) = {
-                        let inf = &mut *inf;
+                        let inf = &*inf;
                         let mut skip = 0;
                         let mut dest = None;
                         {

src/librustc/middle/trans/common.rs

@@ -430,7 +430,7 @@ pub struct cleanup_path {
     dest: BasicBlockRef
 }
 
-pub fn shrink_scope_clean(scope_info: &mut ScopeInfo, size: uint) {
+pub fn shrink_scope_clean(scope_info: &ScopeInfo, size: uint) {
     scope_info.landing_pad.set(None);
     let new_cleanup_paths = {
         let cleanup_paths = scope_info.cleanup_paths.borrow();
@@ -443,7 +443,7 @@ pub fn shrink_scope_clean(scope_info: &mut ScopeInfo, size: uint) {
     scope_info.cleanup_paths.set(new_cleanup_paths)
 }
 
-pub fn grow_scope_clean(scope_info: &mut ScopeInfo) {
+pub fn grow_scope_clean(scope_info: &ScopeInfo) {
     scope_info.landing_pad.set(None);
 }
 
@@ -623,7 +623,7 @@ pub fn block_cleanups(bcx: &Block) -> ~[cleanup] {
 }
 
 pub struct ScopeInfo {
-    parent: Option<@mut ScopeInfo>,
+    parent: Option<@ScopeInfo>,
     loop_break: Option<@Block>,
     loop_label: Option<Name>,
     // A list of functions that must be run at when leaving this
@@ -640,7 +640,7 @@ pub struct ScopeInfo {
 }
 
 impl ScopeInfo {
-    pub fn empty_cleanups(&mut self) -> bool {
+    pub fn empty_cleanups(&self) -> bool {
         let cleanups = self.cleanups.borrow();
         cleanups.get().is_empty()
     }
@@ -694,7 +694,7 @@ pub struct Block {
     unreachable: Cell<bool>,
     parent: Option<@Block>,
     // The current scope within this basic block
-    scope: RefCell<Option<@mut ScopeInfo>>,
+    scope: RefCell<Option<@ScopeInfo>>,
     // Is this block part of a landing pad?
     is_lpad: bool,
     // info about the AST node this block originated from, if any
@@ -803,7 +803,7 @@ pub fn val_ty(v: ValueRef) -> Type {
 
 pub fn in_scope_cx(cx: @Block,
                    scope_id: Option<ast::NodeId>,
-                   f: |si: &mut ScopeInfo|) {
+                   f: |si: &ScopeInfo|) {
     let mut cur = cx;
     let mut cur_scope = cur.scope.get();
     loop {