Replace NonCopyable usage with NoPod

cc rust-lang#10834

Author: flaper87

src/libextra/sync/mod.rs

@@ -19,11 +19,11 @@
 
 use std::cast;
 use std::comm;
+use std::kinds::marker;
 use std::sync::arc::UnsafeArc;
 use std::sync::atomics;
 use std::unstable::finally::Finally;
 use std::util;
-use std::util::NonCopyable;
 
 use arc::MutexArc;
 
@@ -191,7 +191,7 @@ pub struct Condvar<'a> {
     // See the comment in write_cond for more detail.
     priv order: ReacquireOrderLock<'a>,
     // Make sure condvars are non-copyable.
-    priv token: util::NonCopyable,
+    priv nopod: marker::NoPod,
 }
 
 impl<'a> Condvar<'a> {
@@ -334,7 +334,7 @@ impl Sem<~[WaitQueue]> {
             blk(&Condvar {
                 sem: self,
                 order: Nothing,
-                token: NonCopyable
+                nopod: marker::NoPod
             })
         })
     }
@@ -574,7 +574,7 @@ impl RWLock {
             (&self.order_lock).release();
             let opt_lock = Just(&self.order_lock);
             blk(&Condvar { sem: cond.sem, order: opt_lock,
-                           token: NonCopyable })
+                           nopod: marker::NoPod })
         })
     }
 
@@ -609,7 +609,7 @@ impl RWLock {
         (&self.access_lock).acquire();
         (&self.order_lock).release();
         (|| {
-            blk(RWLockWriteMode { lock: self, token: NonCopyable })
+            blk(RWLockWriteMode { lock: self, nopod: marker::NoPod })
         }).finally(|| {
             let writer_or_last_reader;
             // Check if we're releasing from read mode or from write mode.
@@ -662,16 +662,16 @@ impl RWLock {
                 (&self.access_lock).release();
             }
         }
-        RWLockReadMode { lock: token.lock, token: NonCopyable }
+        RWLockReadMode { lock: token.lock, nopod: marker::NoPod }
     }
 }
 
 /// The "write permission" token used for rwlock.write_downgrade().
 
-pub struct RWLockWriteMode<'a> { priv lock: &'a RWLock, priv token: NonCopyable }
+pub struct RWLockWriteMode<'a> { priv lock: &'a RWLock, priv nopod: marker::NoPod }
 /// The "read permission" token used for rwlock.write_downgrade().
 pub struct RWLockReadMode<'a> { priv lock: &'a RWLock,
-                                   priv token: NonCopyable }
+                                   priv nopod: marker::NoPod }
 
 impl<'a> RWLockWriteMode<'a> {
     /// Access the pre-downgrade rwlock in write mode.
@@ -682,7 +682,7 @@ impl<'a> RWLockWriteMode<'a> {
         // access lock. See comment in RWLock::write_cond for why.
         blk(&Condvar { sem:        &self.lock.access_lock,
                        order: Just(&self.lock.order_lock),
-                       token: NonCopyable })
+                       nopod: marker::NoPod })
     }
 }
 

src/libstd/cell.rs

@@ -12,8 +12,7 @@
 
 use prelude::*;
 use cast;
-use util::NonCopyable;
-use kinds::{marker,Pod};
+use kinds::{marker, Pod};
 
 /// A mutable memory location that admits only `Pod` data.
 pub struct Cell<T> {
@@ -57,9 +56,9 @@ impl<T:Pod> Clone for Cell<T> {
 pub struct RefCell<T> {
     priv value: T,
     priv borrow: BorrowFlag,
-    priv nc: NonCopyable,
     priv marker1: marker::InvariantType<T>,
     priv marker2: marker::NoFreeze,
+    priv marker3: marker::NoPod,
 }
 
 // Values [1, MAX-1] represent the number of `Ref` active
@@ -74,9 +73,9 @@ impl<T> RefCell<T> {
         RefCell {
             marker1: marker::InvariantType::<T>,
             marker2: marker::NoFreeze,
+            marker3: marker::NoPod,
             value: value,
             borrow: UNUSED,
-            nc: NonCopyable
         }
     }
 

src/libstd/option.rs

@@ -481,6 +481,7 @@ mod tests {
     use iter::range;
     use str::StrSlice;
     use util;
+    use kinds::marker;
     use vec::ImmutableVector;
 
     #[test]
@@ -551,7 +552,7 @@ mod tests {
 
     #[test] #[should_fail]
     fn test_option_too_much_dance() {
-        let mut y = Some(util::NonCopyable);
+        let mut y = Some(marker::NoPod);
         let _y2 = y.take_unwrap();
         let _y3 = y.take_unwrap();
     }

src/libstd/sync/atomics.rs

@@ -23,40 +23,40 @@
 
 use unstable::intrinsics;
 use cast;
+use std::kinds::marker;
 use option::{Option,Some,None};
 use ops::Drop;
-use util::NonCopyable;
 
 /**
  * A simple atomic flag, that can be set and cleared. The most basic atomic type.
  */
 pub struct AtomicFlag {
     priv v: int,
-    priv nocopy: NonCopyable
+    priv nopod: marker::NoPod
 }
 
 /**
  * An atomic boolean type.
  */
 pub struct AtomicBool {
     priv v: uint,
-    priv nocopy: NonCopyable
+    priv nopod: marker::NoPod
 }
 
 /**
  * A signed atomic integer type, supporting basic atomic arithmetic operations
  */
 pub struct AtomicInt {
     priv v: int,
-    priv nocopy: NonCopyable
+    priv nopod: marker::NoPod
 }
 
 /**
  * An unsigned atomic integer type, supporting basic atomic arithmetic operations
  */
 pub struct AtomicUint {
     priv v: uint,
-    priv nocopy: NonCopyable
+    priv nopod: marker::NoPod
 }
 
 /**
@@ -66,7 +66,7 @@ pub struct AtomicUint {
 #[cfg(not(stage0))]
 pub struct AtomicU64 {
     priv v: u64,
-    priv nocopy: NonCopyable
+    priv nopod: marker::NoPod
 }
 
 /**
@@ -75,12 +75,12 @@ pub struct AtomicU64 {
 #[cfg(not(stage0))]
 pub struct AtomicPtr<T> {
     priv p: uint,
-    priv nocopy: NonCopyable
+    priv nopod: marker::NoPod
 }
 #[cfg(stage0)]
 pub struct AtomicPtr<T> {
     priv p: *mut T,
-    priv nocopy: NonCopyable
+    priv nopod: marker::NoPod
 }
 
 /**
@@ -105,17 +105,17 @@ pub enum Ordering {
     SeqCst
 }
 
-pub static INIT_ATOMIC_FLAG : AtomicFlag = AtomicFlag { v: 0, nocopy: NonCopyable };
-pub static INIT_ATOMIC_BOOL : AtomicBool = AtomicBool { v: 0, nocopy: NonCopyable };
-pub static INIT_ATOMIC_INT  : AtomicInt  = AtomicInt  { v: 0, nocopy: NonCopyable };
-pub static INIT_ATOMIC_UINT : AtomicUint = AtomicUint { v: 0, nocopy: NonCopyable };
+pub static INIT_ATOMIC_FLAG : AtomicFlag = AtomicFlag { v: 0, nopod: marker::NoPod };
+pub static INIT_ATOMIC_BOOL : AtomicBool = AtomicBool { v: 0, nopod: marker::NoPod };
+pub static INIT_ATOMIC_INT  : AtomicInt  = AtomicInt  { v: 0, nopod: marker::NoPod };
+pub static INIT_ATOMIC_UINT : AtomicUint = AtomicUint { v: 0, nopod: marker::NoPod };
 #[cfg(not(stage0))]
-pub static INIT_ATOMIC_U64 : AtomicU64 = AtomicU64 { v: 0, nocopy: NonCopyable };
+pub static INIT_ATOMIC_U64 : AtomicU64 = AtomicU64 { v: 0, nopod: marker::NoPod };
 
 impl AtomicFlag {
 
     pub fn new() -> AtomicFlag {
-        AtomicFlag { v: 0, nocopy: NonCopyable }
+        AtomicFlag { v: 0, nopod: marker::NoPod}
     }
 
     /**
@@ -138,7 +138,7 @@ impl AtomicFlag {
 
 impl AtomicBool {
     pub fn new(v: bool) -> AtomicBool {
-        AtomicBool { v: if v { 1 } else { 0 }, nocopy: NonCopyable }
+        AtomicBool { v: if v { 1 } else { 0 }, nopod: marker::NoPod }
     }
 
     #[inline]
@@ -203,7 +203,7 @@ impl AtomicBool {
 
 impl AtomicInt {
     pub fn new(v: int) -> AtomicInt {
-        AtomicInt { v:v, nocopy: NonCopyable }
+        AtomicInt { v:v, nopod: marker::NoPod}
     }
 
     #[inline]
@@ -242,7 +242,7 @@ impl AtomicInt {
 #[cfg(not(stage0))]
 impl AtomicU64 {
     pub fn new(v: u64) -> AtomicU64 {
-        AtomicU64 { v:v, nocopy: NonCopyable }
+        AtomicU64 { v:v, nopod: marker::NoPod }
     }
 
     #[inline]
@@ -278,7 +278,7 @@ impl AtomicU64 {
 
 impl AtomicUint {
     pub fn new(v: uint) -> AtomicUint {
-        AtomicUint { v:v, nocopy: NonCopyable }
+        AtomicUint { v:v, nopod: marker::NoPod }
     }
 
     #[inline]
@@ -317,11 +317,11 @@ impl AtomicUint {
 impl<T> AtomicPtr<T> {
     #[cfg(stage0)]
     pub fn new(p: *mut T) -> AtomicPtr<T> {
-        AtomicPtr { p: p, nocopy: NonCopyable }
+        AtomicPtr { p: p, nopod: marker::NoPod }
     }
     #[cfg(not(stage0))]
     pub fn new(p: *mut T) -> AtomicPtr<T> {
-        AtomicPtr { p: p as uint, nocopy: NonCopyable }
+        AtomicPtr { p: p as uint, nopod: marker::NoPod }
     }
 
     #[inline]

src/libstd/task.rs

@@ -56,15 +56,14 @@
 use any::Any;
 use comm::{Chan, Port};
 use io::Writer;
-use kinds::Send;
+use kinds::{Send, marker};
 use logging::Logger;
 use option::{None, Some, Option};
 use result::{Result, Ok, Err};
 use rt::local::Local;
 use rt::task::Task;
 use send_str::{SendStr, IntoSendStr};
 use str::Str;
-use util;
 
 #[cfg(test)] use any::{AnyOwnExt, AnyRefExt};
 #[cfg(test)] use comm::SharedChan;
@@ -126,7 +125,7 @@ pub struct TaskOpts {
 pub struct TaskBuilder {
     opts: TaskOpts,
     priv gen_body: Option<proc(v: proc()) -> proc()>,
-    priv can_not_copy: Option<util::NonCopyable>,
+    priv nopod: Option<marker::NoPod>,
 }
 
 /**
@@ -138,7 +137,7 @@ pub fn task() -> TaskBuilder {
     TaskBuilder {
         opts: TaskOpts::new(),
         gen_body: None,
-        can_not_copy: None,
+        nopod: None,
     }
 }
 

src/libstd/util.rs

@@ -12,7 +12,6 @@
 
 use cast;
 use ptr;
-use prelude::*;
 use unstable::intrinsics;
 
 /// The identity function.
@@ -53,15 +52,6 @@ pub fn replace<T>(dest: &mut T, mut src: T) -> T {
     src
 }
 
-/// A non-copyable dummy type.
-#[deriving(Eq, TotalEq, Ord, TotalOrd)]
-#[unsafe_no_drop_flag]
-pub struct NonCopyable;
-
-impl Drop for NonCopyable {
-    fn drop(&mut self) { }
-}
-
 /// A type with no inhabitants
 pub enum Void { }
 
@@ -101,37 +91,11 @@ mod tests {
 
     #[test]
     fn test_replace() {
-        let mut x = Some(NonCopyable);
+        let mut x = Some(~"test");
         let y = replace(&mut x, None);
         assert!(x.is_none());
         assert!(y.is_some());
     }
-
-    #[test]
-    fn test_noncopyable() {
-        assert_eq!(size_of::<NonCopyable>(), 0);
-
-        // verify that `#[unsafe_no_drop_flag]` works as intended on a zero-size struct
-
-        static mut did_run: bool = false;
-
-        struct Foo { five: int }
-
-        impl Drop for Foo {
-            fn drop(&mut self) {
-                assert_eq!(self.five, 5);
-                unsafe {
-                    did_run = true;
-                }
-            }
-        }
-
-        {
-            let _a = (NonCopyable, Foo { five: 5 }, NonCopyable);
-        }
-
-        unsafe { assert_eq!(did_run, true); }
-    }
 }
 
 /// Completely miscellaneous language-construct benchmarks.

src/libsyntax/parse/parser.rs

@@ -81,6 +81,7 @@ use opt_vec::OptVec;
 
 use std::cell::Cell;
 use std::hashmap::HashSet;
+use std::kinds::marker;
 use std::util;
 use std::vec;
 
@@ -317,7 +318,7 @@ pub fn Parser(sess: @ParseSess, cfg: ast::CrateConfig, rdr: @Reader)
         obsolete_set: HashSet::new(),
         mod_path_stack: ~[],
         open_braces: ~[],
-        non_copyable: util::NonCopyable
+        nopod: marker::NoPod
     }
 }
 
@@ -348,7 +349,7 @@ pub struct Parser {
     /// Stack of spans of open delimiters. Used for error message.
     open_braces: ~[Span],
     /* do not copy the parser; its state is tied to outside state */
-    priv non_copyable: util::NonCopyable
+    priv nopod: marker::NoPod
 }
 
 fn is_plain_ident_or_underscore(t: &token::Token) -> bool {