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-rw-r--r--src/libstd/serialize.rs978
1 files changed, 0 insertions, 978 deletions
diff --git a/src/libstd/serialize.rs b/src/libstd/serialize.rs
index 39fb5a45d7e..a5d2604b6f6 100644
--- a/src/libstd/serialize.rs
+++ b/src/libstd/serialize.rs
@@ -20,80 +20,8 @@ use core::hashmap::{HashMap, HashSet};
 use core::trie::{TrieMap, TrieSet};
 use deque::Deque;
 use dlist::DList;
-#[cfg(stage1)]
-#[cfg(stage2)]
-#[cfg(stage3)]
 use treemap::{TreeMap, TreeSet};
 
-#[cfg(stage0)]
-pub trait Encoder {
-    // Primitive types:
-    fn emit_nil(&self);
-    fn emit_uint(&self, v: uint);
-    fn emit_u64(&self, v: u64);
-    fn emit_u32(&self, v: u32);
-    fn emit_u16(&self, v: u16);
-    fn emit_u8(&self, v: u8);
-    fn emit_int(&self, v: int);
-    fn emit_i64(&self, v: i64);
-    fn emit_i32(&self, v: i32);
-    fn emit_i16(&self, v: i16);
-    fn emit_i8(&self, v: i8);
-    fn emit_bool(&self, v: bool);
-    fn emit_float(&self, v: float);
-    fn emit_f64(&self, v: f64);
-    fn emit_f32(&self, v: f32);
-    fn emit_char(&self, v: char);
-    fn emit_str(&self, v: &str);
-
-    // Compound types:
-    fn emit_enum(&self, name: &str, f: &fn());
-
-    fn emit_enum_variant(&self,
-                         v_name: &str,
-                         v_id: uint,
-                         len: uint,
-                         f: &fn());
-    fn emit_enum_variant_arg(&self, a_idx: uint, f: &fn());
-
-    fn emit_enum_struct_variant(&self,
-                                v_name: &str,
-                                v_id: uint,
-                                len: uint,
-                                f: &fn());
-    fn emit_enum_struct_variant_field(&self,
-                                      f_name: &str,
-                                      f_idx: uint,
-                                      f: &fn());
-
-    fn emit_struct(&self, name: &str, len: uint, f: &fn());
-    #[cfg(stage0)]
-    fn emit_field(&self, f_name: &str, f_idx: uint, f: &fn());
-    #[cfg(stage1)]
-    #[cfg(stage2)]
-    #[cfg(stage3)]
-    fn emit_struct_field(&self, f_name: &str, f_idx: uint, f: &fn());
-
-    fn emit_tuple(&self, len: uint, f: &fn());
-    fn emit_tuple_arg(&self, idx: uint, f: &fn());
-
-    fn emit_tuple_struct(&self, name: &str, len: uint, f: &fn());
-    fn emit_tuple_struct_arg(&self, f_idx: uint, f: &fn());
-
-    // Specialized types:
-    fn emit_option(&self, f: &fn());
-    fn emit_option_none(&self);
-    fn emit_option_some(&self, f: &fn());
-
-    fn emit_seq(&self, len: uint, f: &fn());
-    fn emit_seq_elt(&self, idx: uint, f: &fn());
-
-    fn emit_map(&self, len: uint, f: &fn());
-    fn emit_map_elt_key(&self, idx: uint, f: &fn());
-    fn emit_map_elt_val(&self, idx: uint, f: &fn());
-}
-
-#[cfg(not(stage0))]
 pub trait Encoder {
     // Primitive types:
     fn emit_nil(&mut self);
@@ -159,80 +87,6 @@ pub trait Encoder {
     fn emit_map_elt_val(&mut self, idx: uint, f: &fn(&mut Self));
 }
 
-#[cfg(stage0)]
-pub trait Decoder {
-    // Primitive types:
-    fn read_nil(&self) -> ();
-    fn read_uint(&self) -> uint;
-    fn read_u64(&self) -> u64;
-    fn read_u32(&self) -> u32;
-    fn read_u16(&self) -> u16;
-    fn read_u8(&self) -> u8;
-    fn read_int(&self) -> int;
-    fn read_i64(&self) -> i64;
-    fn read_i32(&self) -> i32;
-    fn read_i16(&self) -> i16;
-    fn read_i8(&self) -> i8;
-    fn read_bool(&self) -> bool;
-    fn read_f64(&self) -> f64;
-    fn read_f32(&self) -> f32;
-    fn read_float(&self) -> float;
-    fn read_char(&self) -> char;
-    fn read_str(&self) -> ~str;
-
-    // Compound types:
-    fn read_enum<T>(&self, name: &str, f: &fn() -> T) -> T;
-
-    fn read_enum_variant<T>(&self,
-                            names: &[&str],
-                            f: &fn(uint) -> T)
-                            -> T;
-    fn read_enum_variant_arg<T>(&self, a_idx: uint, f: &fn() -> T) -> T;
-
-    fn read_enum_struct_variant<T>(&self,
-                                   names: &[&str],
-                                   f: &fn(uint) -> T)
-                                   -> T;
-    fn read_enum_struct_variant_field<T>(&self,
-                                         &f_name: &str,
-                                         f_idx: uint,
-                                         f: &fn() -> T)
-                                         -> T;
-
-    fn read_struct<T>(&self, s_name: &str, len: uint, f: &fn() -> T) -> T;
-    #[cfg(stage0)]
-    fn read_field<T>(&self,
-                     f_name: &str,
-                     f_idx: uint,
-                     f: &fn() -> T)
-                     -> T;
-    #[cfg(stage1)]
-    #[cfg(stage2)]
-    #[cfg(stage3)]
-    fn read_struct_field<T>(&self,
-                            f_name: &str,
-                            f_idx: uint,
-                            f: &fn() -> T)
-                            -> T;
-
-    fn read_tuple<T>(&self, f: &fn(uint) -> T) -> T;
-    fn read_tuple_arg<T>(&self, a_idx: uint, f: &fn() -> T) -> T;
-
-    fn read_tuple_struct<T>(&self, s_name: &str, f: &fn(uint) -> T) -> T;
-    fn read_tuple_struct_arg<T>(&self, a_idx: uint, f: &fn() -> T) -> T;
-
-    // Specialized types:
-    fn read_option<T>(&self, f: &fn(bool) -> T) -> T;
-
-    fn read_seq<T>(&self, f: &fn(uint) -> T) -> T;
-    fn read_seq_elt<T>(&self, idx: uint, f: &fn() -> T) -> T;
-
-    fn read_map<T>(&self, f: &fn(uint) -> T) -> T;
-    fn read_map_elt_key<T>(&self, idx: uint, f: &fn() -> T) -> T;
-    fn read_map_elt_val<T>(&self, idx: uint, f: &fn() -> T) -> T;
-}
-
-#[cfg(not(stage0))]
 pub trait Decoder {
     // Primitive types:
     fn read_nil(&mut self) -> ();
@@ -280,15 +134,6 @@ pub trait Decoder {
                       len: uint,
                       f: &fn(&mut Self) -> T)
                       -> T;
-    #[cfg(stage0)]
-    fn read_field<T>(&mut self,
-                     f_name: &str,
-                     f_idx: uint,
-                     f: &fn() -> T)
-                     -> T;
-    #[cfg(stage1)]
-    #[cfg(stage2)]
-    #[cfg(stage3)]
     fn read_struct_field<T>(&mut self,
                             f_name: &str,
                             f_idx: uint,
@@ -318,598 +163,254 @@ pub trait Decoder {
     fn read_map_elt_val<T>(&mut self, idx: uint, f: &fn(&mut Self) -> T) -> T;
 }
 
-#[cfg(stage0)]
-pub trait Encodable<S:Encoder> {
-    fn encode(&self, s: &S);
-}
-
-#[cfg(not(stage0))]
 pub trait Encodable<S:Encoder> {
     fn encode(&self, s: &mut S);
 }
 
-#[cfg(stage0)]
-pub trait Decodable<D:Decoder> {
-    fn decode(d: &D) -> Self;
-}
-
-#[cfg(not(stage0))]
 pub trait Decodable<D:Decoder> {
     fn decode(d: &mut D) -> Self;
 }
 
-#[cfg(stage0)]
-impl<S:Encoder> Encodable<S> for uint {
-    fn encode(&self, s: &S) {
-        s.emit_uint(*self)
-    }
-}
-
-#[cfg(not(stage0))]
 impl<S:Encoder> Encodable<S> for uint {
     fn encode(&self, s: &mut S) {
         s.emit_uint(*self)
     }
 }
 
-#[cfg(stage0)]
-impl<D:Decoder> Decodable<D> for uint {
-    fn decode(d: &D) -> uint {
-        d.read_uint()
-    }
-}
-
-#[cfg(not(stage0))]
 impl<D:Decoder> Decodable<D> for uint {
     fn decode(d: &mut D) -> uint {
         d.read_uint()
     }
 }
 
-#[cfg(stage0)]
-impl<S:Encoder> Encodable<S> for u8 {
-    fn encode(&self, s: &S) {
-        s.emit_u8(*self)
-    }
-}
-
-#[cfg(not(stage0))]
 impl<S:Encoder> Encodable<S> for u8 {
     fn encode(&self, s: &mut S) {
         s.emit_u8(*self)
     }
 }
 
-#[cfg(stage0)]
-impl<D:Decoder> Decodable<D> for u8 {
-    fn decode(d: &D) -> u8 {
-        d.read_u8()
-    }
-}
-
-#[cfg(not(stage0))]
 impl<D:Decoder> Decodable<D> for u8 {
     fn decode(d: &mut D) -> u8 {
         d.read_u8()
     }
 }
 
-#[cfg(stage0)]
-impl<S:Encoder> Encodable<S> for u16 {
-    fn encode(&self, s: &S) {
-        s.emit_u16(*self)
-    }
-}
-
-#[cfg(not(stage0))]
 impl<S:Encoder> Encodable<S> for u16 {
     fn encode(&self, s: &mut S) {
         s.emit_u16(*self)
     }
 }
 
-#[cfg(stage0)]
-impl<D:Decoder> Decodable<D> for u16 {
-    fn decode(d: &D) -> u16 {
-        d.read_u16()
-    }
-}
-
-#[cfg(not(stage0))]
 impl<D:Decoder> Decodable<D> for u16 {
     fn decode(d: &mut D) -> u16 {
         d.read_u16()
     }
 }
 
-#[cfg(stage0)]
-impl<S:Encoder> Encodable<S> for u32 {
-    fn encode(&self, s: &S) {
-        s.emit_u32(*self)
-    }
-}
-
-#[cfg(not(stage0))]
 impl<S:Encoder> Encodable<S> for u32 {
     fn encode(&self, s: &mut S) {
         s.emit_u32(*self)
     }
 }
 
-#[cfg(stage0)]
-impl<D:Decoder> Decodable<D> for u32 {
-    fn decode(d: &D) -> u32 {
-        d.read_u32()
-    }
-}
-
-#[cfg(not(stage0))]
 impl<D:Decoder> Decodable<D> for u32 {
     fn decode(d: &mut D) -> u32 {
         d.read_u32()
     }
 }
 
-#[cfg(stage0)]
-impl<S:Encoder> Encodable<S> for u64 {
-    fn encode(&self, s: &S) {
-        s.emit_u64(*self)
-    }
-}
-
-#[cfg(not(stage0))]
 impl<S:Encoder> Encodable<S> for u64 {
     fn encode(&self, s: &mut S) {
         s.emit_u64(*self)
     }
 }
 
-#[cfg(stage0)]
-impl<D:Decoder> Decodable<D> for u64 {
-    fn decode(d: &D) -> u64 {
-        d.read_u64()
-    }
-}
-
-#[cfg(not(stage0))]
 impl<D:Decoder> Decodable<D> for u64 {
     fn decode(d: &mut D) -> u64 {
         d.read_u64()
     }
 }
 
-#[cfg(stage0)]
-impl<S:Encoder> Encodable<S> for int {
-    fn encode(&self, s: &S) {
-        s.emit_int(*self)
-    }
-}
-
-#[cfg(not(stage0))]
 impl<S:Encoder> Encodable<S> for int {
     fn encode(&self, s: &mut S) {
         s.emit_int(*self)
     }
 }
 
-#[cfg(stage0)]
-impl<D:Decoder> Decodable<D> for int {
-    fn decode(d: &D) -> int {
-        d.read_int()
-    }
-}
-
-#[cfg(not(stage0))]
 impl<D:Decoder> Decodable<D> for int {
     fn decode(d: &mut D) -> int {
         d.read_int()
     }
 }
 
-#[cfg(stage0)]
-impl<S:Encoder> Encodable<S> for i8 {
-    fn encode(&self, s: &S) {
-        s.emit_i8(*self)
-    }
-}
-
-#[cfg(not(stage0))]
 impl<S:Encoder> Encodable<S> for i8 {
     fn encode(&self, s: &mut S) {
         s.emit_i8(*self)
     }
 }
 
-#[cfg(stage0)]
-impl<D:Decoder> Decodable<D> for i8 {
-    fn decode(d: &D) -> i8 {
-        d.read_i8()
-    }
-}
-
-#[cfg(not(stage0))]
 impl<D:Decoder> Decodable<D> for i8 {
     fn decode(d: &mut D) -> i8 {
         d.read_i8()
     }
 }
 
-#[cfg(stage0)]
-impl<S:Encoder> Encodable<S> for i16 {
-    fn encode(&self, s: &S) {
-        s.emit_i16(*self)
-    }
-}
-
-#[cfg(not(stage0))]
 impl<S:Encoder> Encodable<S> for i16 {
     fn encode(&self, s: &mut S) {
         s.emit_i16(*self)
     }
 }
 
-#[cfg(stage0)]
-impl<D:Decoder> Decodable<D> for i16 {
-    fn decode(d: &D) -> i16 {
-        d.read_i16()
-    }
-}
-
-#[cfg(not(stage0))]
 impl<D:Decoder> Decodable<D> for i16 {
     fn decode(d: &mut D) -> i16 {
         d.read_i16()
     }
 }
 
-#[cfg(stage0)]
-impl<S:Encoder> Encodable<S> for i32 {
-    fn encode(&self, s: &S) {
-        s.emit_i32(*self)
-    }
-}
-
-#[cfg(not(stage0))]
 impl<S:Encoder> Encodable<S> for i32 {
     fn encode(&self, s: &mut S) {
         s.emit_i32(*self)
     }
 }
 
-#[cfg(stage0)]
-impl<D:Decoder> Decodable<D> for i32 {
-    fn decode(d: &D) -> i32 {
-        d.read_i32()
-    }
-}
-
-#[cfg(not(stage0))]
 impl<D:Decoder> Decodable<D> for i32 {
     fn decode(d: &mut D) -> i32 {
         d.read_i32()
     }
 }
 
-#[cfg(stage0)]
-impl<S:Encoder> Encodable<S> for i64 {
-    fn encode(&self, s: &S) {
-        s.emit_i64(*self)
-    }
-}
-
-#[cfg(not(stage0))]
 impl<S:Encoder> Encodable<S> for i64 {
     fn encode(&self, s: &mut S) {
         s.emit_i64(*self)
     }
 }
 
-#[cfg(stage0)]
-impl<D:Decoder> Decodable<D> for i64 {
-    fn decode(d: &D) -> i64 {
-        d.read_i64()
-    }
-}
-
-#[cfg(not(stage0))]
 impl<D:Decoder> Decodable<D> for i64 {
     fn decode(d: &mut D) -> i64 {
         d.read_i64()
     }
 }
 
-#[cfg(stage0)]
-impl<'self, S:Encoder> Encodable<S> for &'self str {
-    fn encode(&self, s: &S) {
-        s.emit_str(*self)
-    }
-}
-
-#[cfg(not(stage0))]
 impl<'self, S:Encoder> Encodable<S> for &'self str {
     fn encode(&self, s: &mut S) {
         s.emit_str(*self)
     }
 }
 
-#[cfg(stage0)]
-impl<S:Encoder> Encodable<S> for ~str {
-    fn encode(&self, s: &S) {
-        s.emit_str(*self)
-    }
-}
-
-#[cfg(not(stage0))]
 impl<S:Encoder> Encodable<S> for ~str {
     fn encode(&self, s: &mut S) {
         s.emit_str(*self)
     }
 }
 
-#[cfg(stage0)]
-impl<D:Decoder> Decodable<D> for ~str {
-    fn decode(d: &D) -> ~str {
-        d.read_str()
-    }
-}
-
-#[cfg(not(stage0))]
 impl<D:Decoder> Decodable<D> for ~str {
     fn decode(d: &mut D) -> ~str {
         d.read_str()
     }
 }
 
-#[cfg(stage0)]
-impl<S:Encoder> Encodable<S> for @str {
-    fn encode(&self, s: &S) {
-        s.emit_str(*self)
-    }
-}
-
-#[cfg(not(stage0))]
 impl<S:Encoder> Encodable<S> for @str {
     fn encode(&self, s: &mut S) {
         s.emit_str(*self)
     }
 }
 
-#[cfg(stage0)]
-impl<D:Decoder> Decodable<D> for @str {
-    fn decode(d: &D) -> @str {
-        d.read_str().to_managed()
-    }
-}
-
-#[cfg(not(stage0))]
 impl<D:Decoder> Decodable<D> for @str {
     fn decode(d: &mut D) -> @str {
         d.read_str().to_managed()
     }
 }
 
-#[cfg(stage0)]
-impl<S:Encoder> Encodable<S> for float {
-    fn encode(&self, s: &S) {
-        s.emit_float(*self)
-    }
-}
-
-#[cfg(not(stage0))]
 impl<S:Encoder> Encodable<S> for float {
     fn encode(&self, s: &mut S) {
         s.emit_float(*self)
     }
 }
 
-#[cfg(stage0)]
-impl<D:Decoder> Decodable<D> for float {
-    fn decode(d: &D) -> float {
-        d.read_float()
-    }
-}
-
-#[cfg(not(stage0))]
 impl<D:Decoder> Decodable<D> for float {
     fn decode(d: &mut D) -> float {
         d.read_float()
     }
 }
 
-#[cfg(stage0)]
-impl<S:Encoder> Encodable<S> for f32 {
-    fn encode(&self, s: &S) {
-        s.emit_f32(*self)
-    }
-}
-
-#[cfg(not(stage0))]
 impl<S:Encoder> Encodable<S> for f32 {
     fn encode(&self, s: &mut S) {
         s.emit_f32(*self)
     }
 }
 
-#[cfg(stage0)]
-impl<D:Decoder> Decodable<D> for f32 {
-    fn decode(d: &D) -> f32 {
-        d.read_f32()
-    }
-}
-
-#[cfg(not(stage0))]
 impl<D:Decoder> Decodable<D> for f32 {
     fn decode(d: &mut D) -> f32 {
         d.read_f32()
     }
 }
 
-#[cfg(stage0)]
-impl<S:Encoder> Encodable<S> for f64 {
-    fn encode(&self, s: &S) {
-        s.emit_f64(*self)
-    }
-}
-
-#[cfg(not(stage0))]
 impl<S:Encoder> Encodable<S> for f64 {
     fn encode(&self, s: &mut S) {
         s.emit_f64(*self)
     }
 }
 
-#[cfg(stage0)]
-impl<D:Decoder> Decodable<D> for f64 {
-    fn decode(d: &D) -> f64 {
-        d.read_f64()
-    }
-}
-
-#[cfg(not(stage0))]
 impl<D:Decoder> Decodable<D> for f64 {
     fn decode(d: &mut D) -> f64 {
         d.read_f64()
     }
 }
 
-#[cfg(stage0)]
-impl<S:Encoder> Encodable<S> for bool {
-    fn encode(&self, s: &S) {
-        s.emit_bool(*self)
-    }
-}
-
-#[cfg(not(stage0))]
 impl<S:Encoder> Encodable<S> for bool {
     fn encode(&self, s: &mut S) {
         s.emit_bool(*self)
     }
 }
 
-#[cfg(stage0)]
-impl<D:Decoder> Decodable<D> for bool {
-    fn decode(d: &D) -> bool {
-        d.read_bool()
-    }
-}
-
-#[cfg(not(stage0))]
 impl<D:Decoder> Decodable<D> for bool {
     fn decode(d: &mut D) -> bool {
         d.read_bool()
     }
 }
 
-#[cfg(stage0)]
-impl<S:Encoder> Encodable<S> for () {
-    fn encode(&self, s: &S) {
-        s.emit_nil()
-    }
-}
-
-#[cfg(not(stage0))]
 impl<S:Encoder> Encodable<S> for () {
     fn encode(&self, s: &mut S) {
         s.emit_nil()
     }
 }
 
-#[cfg(stage0)]
-impl<D:Decoder> Decodable<D> for () {
-    fn decode(d: &D) -> () {
-        d.read_nil()
-    }
-}
-
-#[cfg(not(stage0))]
 impl<D:Decoder> Decodable<D> for () {
     fn decode(d: &mut D) -> () {
         d.read_nil()
     }
 }
 
-#[cfg(stage0)]
-impl<'self, S:Encoder,T:Encodable<S>> Encodable<S> for &'self T {
-    fn encode(&self, s: &S) {
-        (**self).encode(s)
-    }
-}
-
-#[cfg(not(stage0))]
 impl<'self, S:Encoder,T:Encodable<S>> Encodable<S> for &'self T {
     fn encode(&self, s: &mut S) {
         (**self).encode(s)
     }
 }
 
-#[cfg(stage0)]
-impl<S:Encoder,T:Encodable<S>> Encodable<S> for ~T {
-    fn encode(&self, s: &S) {
-        (**self).encode(s)
-    }
-}
-
-#[cfg(not(stage0))]
 impl<S:Encoder,T:Encodable<S>> Encodable<S> for ~T {
     fn encode(&self, s: &mut S) {
         (**self).encode(s)
     }
 }
 
-#[cfg(stage0)]
-impl<D:Decoder,T:Decodable<D>> Decodable<D> for ~T {
-    fn decode(d: &D) -> ~T {
-        ~Decodable::decode(d)
-    }
-}
-
-#[cfg(not(stage0))]
 impl<D:Decoder,T:Decodable<D>> Decodable<D> for ~T {
     fn decode(d: &mut D) -> ~T {
         ~Decodable::decode(d)
     }
 }
 
-#[cfg(stage0)]
-impl<S:Encoder,T:Encodable<S>> Encodable<S> for @T {
-    fn encode(&self, s: &S) {
-        (**self).encode(s)
-    }
-}
-
-#[cfg(not(stage0))]
 impl<S:Encoder,T:Encodable<S>> Encodable<S> for @T {
     fn encode(&self, s: &mut S) {
         (**self).encode(s)
     }
 }
 
-#[cfg(stage0)]
-impl<D:Decoder,T:Decodable<D>> Decodable<D> for @T {
-    fn decode(d: &D) -> @T {
-        @Decodable::decode(d)
-    }
-}
-
-#[cfg(not(stage0))]
 impl<D:Decoder,T:Decodable<D>> Decodable<D> for @T {
     fn decode(d: &mut D) -> @T {
         @Decodable::decode(d)
     }
 }
 
-#[cfg(stage0)]
-impl<'self, S:Encoder,T:Encodable<S>> Encodable<S> for &'self [T] {
-    fn encode(&self, s: &S) {
-        do s.emit_seq(self.len()) {
-            for self.eachi |i, e| {
-                s.emit_seq_elt(i, || e.encode(s))
-            }
-        }
-    }
-}
-
-#[cfg(not(stage0))]
 impl<'self, S:Encoder,T:Encodable<S>> Encodable<S> for &'self [T] {
     fn encode(&self, s: &mut S) {
         do s.emit_seq(self.len()) |s| {
@@ -920,18 +421,6 @@ impl<'self, S:Encoder,T:Encodable<S>> Encodable<S> for &'self [T] {
     }
 }
 
-#[cfg(stage0)]
-impl<S:Encoder,T:Encodable<S>> Encodable<S> for ~[T] {
-    fn encode(&self, s: &S) {
-        do s.emit_seq(self.len()) {
-            for self.eachi |i, e| {
-                s.emit_seq_elt(i, || e.encode(s))
-            }
-        }
-    }
-}
-
-#[cfg(not(stage0))]
 impl<S:Encoder,T:Encodable<S>> Encodable<S> for ~[T] {
     fn encode(&self, s: &mut S) {
         do s.emit_seq(self.len()) |s| {
@@ -942,18 +431,6 @@ impl<S:Encoder,T:Encodable<S>> Encodable<S> for ~[T] {
     }
 }
 
-#[cfg(stage0)]
-impl<D:Decoder,T:Decodable<D>> Decodable<D> for ~[T] {
-    fn decode(d: &D) -> ~[T] {
-        do d.read_seq |len| {
-            do vec::from_fn(len) |i| {
-                d.read_seq_elt(i, || Decodable::decode(d))
-            }
-        }
-    }
-}
-
-#[cfg(not(stage0))]
 impl<D:Decoder,T:Decodable<D>> Decodable<D> for ~[T] {
     fn decode(d: &mut D) -> ~[T] {
         do d.read_seq |d, len| {
@@ -964,18 +441,6 @@ impl<D:Decoder,T:Decodable<D>> Decodable<D> for ~[T] {
     }
 }
 
-#[cfg(stage0)]
-impl<S:Encoder,T:Encodable<S>> Encodable<S> for @[T] {
-    fn encode(&self, s: &S) {
-        do s.emit_seq(self.len()) {
-            for self.eachi |i, e| {
-                s.emit_seq_elt(i, || e.encode(s))
-            }
-        }
-    }
-}
-
-#[cfg(not(stage0))]
 impl<S:Encoder,T:Encodable<S>> Encodable<S> for @[T] {
     fn encode(&self, s: &mut S) {
         do s.emit_seq(self.len()) |s| {
@@ -986,18 +451,6 @@ impl<S:Encoder,T:Encodable<S>> Encodable<S> for @[T] {
     }
 }
 
-#[cfg(stage0)]
-impl<D:Decoder,T:Decodable<D>> Decodable<D> for @[T] {
-    fn decode(d: &D) -> @[T] {
-        do d.read_seq |len| {
-            do at_vec::from_fn(len) |i| {
-                d.read_seq_elt(i, || Decodable::decode(d))
-            }
-        }
-    }
-}
-
-#[cfg(not(stage0))]
 impl<D:Decoder,T:Decodable<D>> Decodable<D> for @[T] {
     fn decode(d: &mut D) -> @[T] {
         do d.read_seq |d, len| {
@@ -1008,19 +461,6 @@ impl<D:Decoder,T:Decodable<D>> Decodable<D> for @[T] {
     }
 }
 
-#[cfg(stage0)]
-impl<S:Encoder,T:Encodable<S>> Encodable<S> for Option<T> {
-    fn encode(&self, s: &S) {
-        do s.emit_option {
-            match *self {
-                None => s.emit_option_none(),
-                Some(ref v) => s.emit_option_some(|| v.encode(s)),
-            }
-        }
-    }
-}
-
-#[cfg(not(stage0))]
 impl<S:Encoder,T:Encodable<S>> Encodable<S> for Option<T> {
     fn encode(&self, s: &mut S) {
         do s.emit_option |s| {
@@ -1032,20 +472,6 @@ impl<S:Encoder,T:Encodable<S>> Encodable<S> for Option<T> {
     }
 }
 
-#[cfg(stage0)]
-impl<D:Decoder,T:Decodable<D>> Decodable<D> for Option<T> {
-    fn decode(d: &D) -> Option<T> {
-        do d.read_option |b| {
-            if b {
-                Some(Decodable::decode(d))
-            } else {
-                None
-            }
-        }
-    }
-}
-
-#[cfg(not(stage0))]
 impl<D:Decoder,T:Decodable<D>> Decodable<D> for Option<T> {
     fn decode(d: &mut D) -> Option<T> {
         do d.read_option |d, b| {
@@ -1058,21 +484,6 @@ impl<D:Decoder,T:Decodable<D>> Decodable<D> for Option<T> {
     }
 }
 
-#[cfg(stage0)]
-impl<S:Encoder,T0:Encodable<S>,T1:Encodable<S>> Encodable<S> for (T0, T1) {
-    fn encode(&self, s: &S) {
-        match *self {
-            (ref t0, ref t1) => {
-                do s.emit_seq(2) {
-                    s.emit_seq_elt(0, || t0.encode(s));
-                    s.emit_seq_elt(1, || t1.encode(s));
-                }
-            }
-        }
-    }
-}
-
-#[cfg(not(stage0))]
 impl<S:Encoder,T0:Encodable<S>,T1:Encodable<S>> Encodable<S> for (T0, T1) {
     fn encode(&self, s: &mut S) {
         match *self {
@@ -1086,20 +497,6 @@ impl<S:Encoder,T0:Encodable<S>,T1:Encodable<S>> Encodable<S> for (T0, T1) {
     }
 }
 
-#[cfg(stage0)]
-impl<D:Decoder,T0:Decodable<D>,T1:Decodable<D>> Decodable<D> for (T0, T1) {
-    fn decode(d: &D) -> (T0, T1) {
-        do d.read_seq |len| {
-            assert!(len == 2);
-            (
-                d.read_seq_elt(0, || Decodable::decode(d)),
-                d.read_seq_elt(1, || Decodable::decode(d))
-            )
-        }
-    }
-}
-
-#[cfg(not(stage0))]
 impl<D:Decoder,T0:Decodable<D>,T1:Decodable<D>> Decodable<D> for (T0, T1) {
     fn decode(d: &mut D) -> (T0, T1) {
         do d.read_seq |d, len| {
@@ -1112,27 +509,6 @@ impl<D:Decoder,T0:Decodable<D>,T1:Decodable<D>> Decodable<D> for (T0, T1) {
     }
 }
 
-#[cfg(stage0)]
-impl<
-    S: Encoder,
-    T0: Encodable<S>,
-    T1: Encodable<S>,
-    T2: Encodable<S>
-> Encodable<S> for (T0, T1, T2) {
-    fn encode(&self, s: &S) {
-        match *self {
-            (ref t0, ref t1, ref t2) => {
-                do s.emit_seq(3) {
-                    s.emit_seq_elt(0, || t0.encode(s));
-                    s.emit_seq_elt(1, || t1.encode(s));
-                    s.emit_seq_elt(2, || t2.encode(s));
-                }
-            }
-        }
-    }
-}
-
-#[cfg(not(stage0))]
 impl<
     S: Encoder,
     T0: Encodable<S>,
@@ -1152,26 +528,6 @@ impl<
     }
 }
 
-#[cfg(stage0)]
-impl<
-    D: Decoder,
-    T0: Decodable<D>,
-    T1: Decodable<D>,
-    T2: Decodable<D>
-> Decodable<D> for (T0, T1, T2) {
-    fn decode(d: &D) -> (T0, T1, T2) {
-        do d.read_seq |len| {
-            assert!(len == 3);
-            (
-                d.read_seq_elt(0, || Decodable::decode(d)),
-                d.read_seq_elt(1, || Decodable::decode(d)),
-                d.read_seq_elt(2, || Decodable::decode(d))
-            )
-        }
-    }
-}
-
-#[cfg(not(stage0))]
 impl<
     D: Decoder,
     T0: Decodable<D>,
@@ -1190,29 +546,6 @@ impl<
     }
 }
 
-#[cfg(stage0)]
-impl<
-    S: Encoder,
-    T0: Encodable<S>,
-    T1: Encodable<S>,
-    T2: Encodable<S>,
-    T3: Encodable<S>
-> Encodable<S> for (T0, T1, T2, T3) {
-    fn encode(&self, s: &S) {
-        match *self {
-            (ref t0, ref t1, ref t2, ref t3) => {
-                do s.emit_seq(4) {
-                    s.emit_seq_elt(0, || t0.encode(s));
-                    s.emit_seq_elt(1, || t1.encode(s));
-                    s.emit_seq_elt(2, || t2.encode(s));
-                    s.emit_seq_elt(3, || t3.encode(s));
-                }
-            }
-        }
-    }
-}
-
-#[cfg(not(stage0))]
 impl<
     S: Encoder,
     T0: Encodable<S>,
@@ -1234,28 +567,6 @@ impl<
     }
 }
 
-#[cfg(stage0)]
-impl<
-    D: Decoder,
-    T0: Decodable<D>,
-    T1: Decodable<D>,
-    T2: Decodable<D>,
-    T3: Decodable<D>
-> Decodable<D> for (T0, T1, T2, T3) {
-    fn decode(d: &D) -> (T0, T1, T2, T3) {
-        do d.read_seq |len| {
-            assert!(len == 4);
-            (
-                d.read_seq_elt(0, || Decodable::decode(d)),
-                d.read_seq_elt(1, || Decodable::decode(d)),
-                d.read_seq_elt(2, || Decodable::decode(d)),
-                d.read_seq_elt(3, || Decodable::decode(d))
-            )
-        }
-    }
-}
-
-#[cfg(not(stage0))]
 impl<
     D: Decoder,
     T0: Decodable<D>,
@@ -1276,31 +587,6 @@ impl<
     }
 }
 
-#[cfg(stage0)]
-impl<
-    S: Encoder,
-    T0: Encodable<S>,
-    T1: Encodable<S>,
-    T2: Encodable<S>,
-    T3: Encodable<S>,
-    T4: Encodable<S>
-> Encodable<S> for (T0, T1, T2, T3, T4) {
-    fn encode(&self, s: &S) {
-        match *self {
-            (ref t0, ref t1, ref t2, ref t3, ref t4) => {
-                do s.emit_seq(5) {
-                    s.emit_seq_elt(0, || t0.encode(s));
-                    s.emit_seq_elt(1, || t1.encode(s));
-                    s.emit_seq_elt(2, || t2.encode(s));
-                    s.emit_seq_elt(3, || t3.encode(s));
-                    s.emit_seq_elt(4, || t4.encode(s));
-                }
-            }
-        }
-    }
-}
-
-#[cfg(not(stage0))]
 impl<
     S: Encoder,
     T0: Encodable<S>,
@@ -1324,30 +610,6 @@ impl<
     }
 }
 
-#[cfg(stage0)]
-impl<
-    D: Decoder,
-    T0: Decodable<D>,
-    T1: Decodable<D>,
-    T2: Decodable<D>,
-    T3: Decodable<D>,
-    T4: Decodable<D>
-> Decodable<D> for (T0, T1, T2, T3, T4) {
-    fn decode(d: &D) -> (T0, T1, T2, T3, T4) {
-        do d.read_seq |len| {
-            assert!(len == 5);
-            (
-                d.read_seq_elt(0, || Decodable::decode(d)),
-                d.read_seq_elt(1, || Decodable::decode(d)),
-                d.read_seq_elt(2, || Decodable::decode(d)),
-                d.read_seq_elt(3, || Decodable::decode(d)),
-                d.read_seq_elt(4, || Decodable::decode(d))
-            )
-        }
-    }
-}
-
-#[cfg(not(stage0))]
 impl<
     D: Decoder,
     T0: Decodable<D>,
@@ -1370,23 +632,6 @@ impl<
     }
 }
 
-#[cfg(stage0)]
-impl<
-    S: Encoder,
-    T: Encodable<S> + Copy
-> Encodable<S> for @mut DList<T> {
-    fn encode(&self, s: &S) {
-        do s.emit_seq(self.size) {
-            let mut i = 0;
-            for self.each |e| {
-                s.emit_seq_elt(i, || e.encode(s));
-                i += 1;
-            }
-        }
-    }
-}
-
-#[cfg(not(stage0))]
 impl<
     S: Encoder,
     T: Encodable<S> + Copy
@@ -1402,20 +647,6 @@ impl<
     }
 }
 
-#[cfg(stage0)]
-impl<D:Decoder,T:Decodable<D>> Decodable<D> for @mut DList<T> {
-    fn decode(d: &D) -> @mut DList<T> {
-        let list = DList();
-        do d.read_seq |len| {
-            for uint::range(0, len) |i| {
-                list.push(d.read_seq_elt(i, || Decodable::decode(d)));
-            }
-        }
-        list
-    }
-}
-
-#[cfg(not(stage0))]
 impl<D:Decoder,T:Decodable<D>> Decodable<D> for @mut DList<T> {
     fn decode(d: &mut D) -> @mut DList<T> {
         let list = DList();
@@ -1428,21 +659,6 @@ impl<D:Decoder,T:Decodable<D>> Decodable<D> for @mut DList<T> {
     }
 }
 
-#[cfg(stage0)]
-impl<
-    S: Encoder,
-    T: Encodable<S>
-> Encodable<S> for Deque<T> {
-    fn encode(&self, s: &S) {
-        do s.emit_seq(self.len()) {
-            for self.eachi |i, e| {
-                s.emit_seq_elt(i, || e.encode(s));
-            }
-        }
-    }
-}
-
-#[cfg(not(stage0))]
 impl<
     S: Encoder,
     T: Encodable<S>
@@ -1456,20 +672,6 @@ impl<
     }
 }
 
-#[cfg(stage0)]
-impl<D:Decoder,T:Decodable<D>> Decodable<D> for Deque<T> {
-    fn decode(d: &D) -> Deque<T> {
-        let mut deque = Deque::new();
-        do d.read_seq |len| {
-            for uint::range(0, len) |i| {
-                deque.add_back(d.read_seq_elt(i, || Decodable::decode(d)));
-            }
-        }
-        deque
-    }
-}
-
-#[cfg(not(stage0))]
 impl<D:Decoder,T:Decodable<D>> Decodable<D> for Deque<T> {
     fn decode(d: &mut D) -> Deque<T> {
         let mut deque = Deque::new();
@@ -1482,25 +684,6 @@ impl<D:Decoder,T:Decodable<D>> Decodable<D> for Deque<T> {
     }
 }
 
-#[cfg(stage0)]
-impl<
-    E: Encoder,
-    K: Encodable<E> + Hash + IterBytes + Eq,
-    V: Encodable<E>
-> Encodable<E> for HashMap<K, V> {
-    fn encode(&self, e: &E) {
-        do e.emit_map(self.len()) {
-            let mut i = 0;
-            for self.each |key, val| {
-                e.emit_map_elt_key(i, || key.encode(e));
-                e.emit_map_elt_val(i, || val.encode(e));
-                i += 1;
-            }
-        }
-    }
-}
-
-#[cfg(not(stage0))]
 impl<
     E: Encoder,
     K: Encodable<E> + Hash + IterBytes + Eq,
@@ -1518,26 +701,6 @@ impl<
     }
 }
 
-#[cfg(stage0)]
-impl<
-    D: Decoder,
-    K: Decodable<D> + Hash + IterBytes + Eq,
-    V: Decodable<D>
-> Decodable<D> for HashMap<K, V> {
-    fn decode(d: &D) -> HashMap<K, V> {
-        do d.read_map |len| {
-            let mut map = HashMap::with_capacity(len);
-            for uint::range(0, len) |i| {
-                let key = d.read_map_elt_key(i, || Decodable::decode(d));
-                let val = d.read_map_elt_val(i, || Decodable::decode(d));
-                map.insert(key, val);
-            }
-            map
-        }
-    }
-}
-
-#[cfg(not(stage0))]
 impl<
     D: Decoder,
     K: Decodable<D> + Hash + IterBytes + Eq,
@@ -1556,23 +719,6 @@ impl<
     }
 }
 
-#[cfg(stage0)]
-impl<
-    S: Encoder,
-    T: Encodable<S> + Hash + IterBytes + Eq
-> Encodable<S> for HashSet<T> {
-    fn encode(&self, s: &S) {
-        do s.emit_seq(self.len()) {
-            let mut i = 0;
-            for self.each |e| {
-                s.emit_seq_elt(i, || e.encode(s));
-                i += 1;
-            }
-        }
-    }
-}
-
-#[cfg(not(stage0))]
 impl<
     S: Encoder,
     T: Encodable<S> + Hash + IterBytes + Eq
@@ -1588,23 +734,6 @@ impl<
     }
 }
 
-#[cfg(stage0)]
-impl<
-    D: Decoder,
-    T: Decodable<D> + Hash + IterBytes + Eq
-> Decodable<D> for HashSet<T> {
-    fn decode(d: &D) -> HashSet<T> {
-        do d.read_seq |len| {
-            let mut set = HashSet::with_capacity(len);
-            for uint::range(0, len) |i| {
-                set.insert(d.read_seq_elt(i, || Decodable::decode(d)));
-            }
-            set
-        }
-    }
-}
-
-#[cfg(not(stage0))]
 impl<
     D: Decoder,
     T: Decodable<D> + Hash + IterBytes + Eq
@@ -1620,24 +749,6 @@ impl<
     }
 }
 
-#[cfg(stage0)]
-impl<
-    E: Encoder,
-    V: Encodable<E>
-> Encodable<E> for TrieMap<V> {
-    fn encode(&self, e: &E) {
-        do e.emit_map(self.len()) {
-            let mut i = 0;
-            for self.each |key, val| {
-                e.emit_map_elt_key(i, || key.encode(e));
-                e.emit_map_elt_val(i, || val.encode(e));
-                i += 1;
-            }
-        }
-    }
-}
-
-#[cfg(not(stage0))]
 impl<
     E: Encoder,
     V: Encodable<E>
@@ -1654,25 +765,6 @@ impl<
     }
 }
 
-#[cfg(stage0)]
-impl<
-    D: Decoder,
-    V: Decodable<D>
-> Decodable<D> for TrieMap<V> {
-    fn decode(d: &D) -> TrieMap<V> {
-        do d.read_map |len| {
-            let mut map = TrieMap::new();
-            for uint::range(0, len) |i| {
-                let key = d.read_map_elt_key(i, || Decodable::decode(d));
-                let val = d.read_map_elt_val(i, || Decodable::decode(d));
-                map.insert(key, val);
-            }
-            map
-        }
-    }
-}
-
-#[cfg(not(stage0))]
 impl<
     D: Decoder,
     V: Decodable<D>
@@ -1690,20 +782,6 @@ impl<
     }
 }
 
-#[cfg(stage0)]
-impl<S: Encoder> Encodable<S> for TrieSet {
-    fn encode(&self, s: &S) {
-        do s.emit_seq(self.len()) {
-            let mut i = 0;
-            for self.each |e| {
-                s.emit_seq_elt(i, || e.encode(s));
-                i += 1;
-            }
-        }
-    }
-}
-
-#[cfg(not(stage0))]
 impl<S: Encoder> Encodable<S> for TrieSet {
     fn encode(&self, s: &mut S) {
         do s.emit_seq(self.len()) |s| {
@@ -1716,20 +794,6 @@ impl<S: Encoder> Encodable<S> for TrieSet {
     }
 }
 
-#[cfg(stage0)]
-impl<D: Decoder> Decodable<D> for TrieSet {
-    fn decode(d: &D) -> TrieSet {
-        do d.read_seq |len| {
-            let mut set = TrieSet::new();
-            for uint::range(0, len) |i| {
-                set.insert(d.read_seq_elt(i, || Decodable::decode(d)));
-            }
-            set
-        }
-    }
-}
-
-#[cfg(not(stage0))]
 impl<D: Decoder> Decodable<D> for TrieSet {
     fn decode(d: &mut D) -> TrieSet {
         do d.read_seq |d, len| {
@@ -1742,7 +806,6 @@ impl<D: Decoder> Decodable<D> for TrieSet {
     }
 }
 
-#[cfg(not(stage0))]
 impl<
     E: Encoder,
     K: Encodable<E> + Eq + TotalOrd,
@@ -1760,7 +823,6 @@ impl<
     }
 }
 
-#[cfg(not(stage0))]
 impl<
     D: Decoder,
     K: Decodable<D> + Eq + TotalOrd,
@@ -1779,7 +841,6 @@ impl<
     }
 }
 
-#[cfg(not(stage0))]
 impl<
     S: Encoder,
     T: Encodable<S> + Eq + TotalOrd
@@ -1795,7 +856,6 @@ impl<
     }
 }
 
-#[cfg(not(stage0))]
 impl<
     D: Decoder,
     T: Decodable<D> + Eq + TotalOrd
@@ -1816,30 +876,10 @@ impl<
 //
 // In some cases, these should eventually be coded as traits.
 
-#[cfg(stage0)]
-pub trait EncoderHelpers {
-    fn emit_from_vec<T>(&self, v: &[T], f: &fn(v: &T));
-}
-
-#[cfg(not(stage0))]
 pub trait EncoderHelpers {
     fn emit_from_vec<T>(&mut self, v: &[T], f: &fn(&mut Self, v: &T));
 }
 
-#[cfg(stage0)]
-impl<S:Encoder> EncoderHelpers for S {
-    fn emit_from_vec<T>(&self, v: &[T], f: &fn(v: &T)) {
-        do self.emit_seq(v.len()) {
-            for v.eachi |i, e| {
-                do self.emit_seq_elt(i) {
-                    f(e)
-                }
-            }
-        }
-    }
-}
-
-#[cfg(not(stage0))]
 impl<S:Encoder> EncoderHelpers for S {
     fn emit_from_vec<T>(&mut self, v: &[T], f: &fn(&mut S, &T)) {
         do self.emit_seq(v.len()) |this| {
@@ -1852,28 +892,10 @@ impl<S:Encoder> EncoderHelpers for S {
     }
 }
 
-#[cfg(stage0)]
-pub trait DecoderHelpers {
-    fn read_to_vec<T>(&self, f: &fn() -> T) -> ~[T];
-}
-
-#[cfg(not(stage0))]
 pub trait DecoderHelpers {
     fn read_to_vec<T>(&mut self, f: &fn(&mut Self) -> T) -> ~[T];
 }
 
-#[cfg(stage0)]
-impl<D:Decoder> DecoderHelpers for D {
-    fn read_to_vec<T>(&self, f: &fn() -> T) -> ~[T] {
-        do self.read_seq |len| {
-            do vec::from_fn(len) |i| {
-                self.read_seq_elt(i, || f())
-            }
-        }
-    }
-}
-
-#[cfg(not(stage0))]
 impl<D:Decoder> DecoderHelpers for D {
     fn read_to_vec<T>(&mut self, f: &fn(&mut D) -> T) -> ~[T] {
         do self.read_seq |this, len| {
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