auto merge of #6185 : gifnksm/rust/prelude-from_str, r=graydon

`core::prelude`  re-exports `core::to_str::ToStr`, but doesn't re-export `core::from_str::FromStr`.
That is inconsistent.

Author: bors

src/libcore/bool.rs

@@ -108,8 +108,6 @@ mod tests {
 
     #[test]
     fn test_bool_from_str() {
-        use from_str::FromStr;
-
         do all_values |v| {
             assert!(Some(v) == FromStr::from_str(to_str(v)))
         }

src/libcore/cast.rs

@@ -10,7 +10,9 @@
 
 //! Unsafe casting functions
 
+#[cfg(not(stage0))]
 use sys;
+#[cfg(not(stage0))]
 use unstable;
 
 pub mod rusti {

src/libcore/core.rc

@@ -111,6 +111,7 @@ pub use num::{Bitwise, BitCount, Bounded};
 pub use num::{Primitive, Int, Float};
 
 pub use ptr::Ptr;
+pub use from_str::FromStr;
 pub use to_str::ToStr;
 pub use clone::Clone;
 

src/libcore/flate.rs

@@ -16,7 +16,6 @@ Simple compression
 
 use libc;
 use libc::{c_void, size_t, c_int};
-use ptr;
 use vec;
 
 #[cfg(test)] use rand;

src/libcore/num/f32.rs

@@ -10,7 +10,6 @@
 
 //! Operations and constants for `f32`
 
-use from_str;
 use num::{Zero, One, strconv};
 use prelude::*;
 
@@ -798,7 +797,7 @@ pub fn from_str_radix(num: &str, rdx: uint) -> Option<f32> {
                              strconv::ExpNone, false, false)
 }
 
-impl from_str::FromStr for f32 {
+impl FromStr for f32 {
     #[inline(always)]
     fn from_str(val: &str) -> Option<f32> { from_str(val) }
 }

src/libcore/num/f64.rs

@@ -10,7 +10,6 @@
 
 //! Operations and constants for `f64`
 
-use from_str;
 use libc::c_int;
 use num::{Zero, One, strconv};
 use prelude::*;
@@ -840,7 +839,7 @@ pub fn from_str_radix(num: &str, rdx: uint) -> Option<f64> {
                              strconv::ExpNone, false, false)
 }
 
-impl from_str::FromStr for f64 {
+impl FromStr for f64 {
     #[inline(always)]
     fn from_str(val: &str) -> Option<f64> { from_str(val) }
 }

src/libcore/num/float.rs

@@ -20,7 +20,6 @@
 
 // PORT this must match in width according to architecture
 
-use from_str;
 use libc::c_int;
 use num::{Zero, One, strconv};
 use prelude::*;
@@ -289,7 +288,7 @@ pub fn from_str_radix(num: &str, radix: uint) -> Option<float> {
                              strconv::ExpNone, false, false)
 }
 
-impl from_str::FromStr for float {
+impl FromStr for float {
     #[inline(always)]
     fn from_str(val: &str) -> Option<float> { from_str(val) }
 }

src/libcore/num/int-template.rs

@@ -10,7 +10,6 @@
 
 use T = self::inst::T;
 
-use from_str::FromStr;
 use num::{ToStrRadix, FromStrRadix};
 use num::{Zero, One, strconv};
 use prelude::*;

src/libcore/num/uint-template.rs

@@ -11,7 +11,6 @@
 use T = self::inst::T;
 use T_SIGNED = self::inst::T_SIGNED;
 
-use from_str::FromStr;
 use num::{ToStrRadix, FromStrRadix};
 use num::{Zero, One, strconv};
 use prelude::*;

src/libcore/pipes.rs

@@ -303,7 +303,7 @@ struct BufferResource<T> {
 }
 
 #[unsafe_destructor]
-impl<T> ::ops::Drop for BufferResource<T> {
+impl<T> Drop for BufferResource<T> {
     fn finalize(&self) {
         unsafe {
             let b = move_it!(self.buffer);
@@ -639,7 +639,7 @@ pub struct SendPacketBuffered<T, Tbuffer> {
 }
 
 #[unsafe_destructor]
-impl<T:Owned,Tbuffer:Owned> ::ops::Drop for SendPacketBuffered<T,Tbuffer> {
+impl<T:Owned,Tbuffer:Owned> Drop for SendPacketBuffered<T,Tbuffer> {
     fn finalize(&self) {
         //if self.p != none {
         //    debug!("drop send %?", option::get(self.p));
@@ -708,7 +708,7 @@ pub struct RecvPacketBuffered<T, Tbuffer> {
 }
 
 #[unsafe_destructor]
-impl<T:Owned,Tbuffer:Owned> ::ops::Drop for RecvPacketBuffered<T,Tbuffer> {
+impl<T:Owned,Tbuffer:Owned> Drop for RecvPacketBuffered<T,Tbuffer> {
     fn finalize(&self) {
         //if self.p != none {
         //    debug!("drop recv %?", option::get(self.p));