only use #[no_core] in libcore

src/compiletest/common.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 #[deriving(Eq)]
 pub enum mode {
     mode_compile_fail,

src/compiletest/compiletest.rc

@@ -10,14 +10,11 @@
 
 #[crate_type = "bin"];
 
-#[no_core];
-
 #[allow(vecs_implicitly_copyable)];
 #[allow(non_camel_case_types)];
 #[allow(deprecated_mode)];
 #[allow(deprecated_pattern)];
 
-extern mod core(vers = "0.7-pre");
 extern mod std(vers = "0.7-pre");
 
 use core::*;

src/compiletest/errors.rs

@@ -8,12 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
-use core::io;
-use core::io::ReaderUtil;
-use core::str;
-
 pub struct ExpectedError { line: uint, kind: ~str, msg: ~str }
 
 // Load any test directives embedded in the file

src/compiletest/header.rs

@@ -8,16 +8,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use common;
 use common::config;
 
-use core::io::ReaderUtil;
-use core::io;
-use core::os;
-use core::str;
-
 pub struct TestProps {
     // Lines that should be expected, in order, on standard out
     error_patterns: ~[~str],

src/compiletest/procsrv.rs

@@ -8,16 +8,10 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
 
-use core::io::{ReaderUtil, WriterUtil};
-use core::io;
 use core::libc::c_int;
-use core::os;
 use core::run::spawn_process;
 use core::run;
-use core::str;
-use core::task;
 
 #[cfg(target_os = "win32")]
 fn target_env(lib_path: ~str, prog: ~str) -> ~[(~str,~str)] {

src/compiletest/runtest.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use common::mode_run_pass;
 use common::mode_run_fail;
 use common::mode_compile_fail;
@@ -22,13 +20,6 @@ use procsrv;
 use util;
 use util::logv;
 
-use core::io::WriterUtil;
-use core::io;
-use core::os;
-use core::str;
-use core::uint;
-use core::vec;
-
 pub fn run(config: config, testfile: ~str) {
     if config.verbose {
         // We're going to be dumping a lot of info. Start on a new line.

src/compiletest/util.rs

@@ -8,11 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use common::config;
 
-use core::io;
 use core::os::getenv;
 
 pub fn make_new_path(path: ~str) -> ~str {

src/libfuzzer/fuzzer.rc

@@ -17,7 +17,6 @@
 #[comment = "The Rust fuzzer library"];
 #[license = "MIT/ASL2"];
 #[crate_type = "lib"];
-#[no_core];
 
 #[legacy_modes];
 
@@ -26,12 +25,10 @@
 #[allow(deprecated_mode)];
 #[allow(deprecated_pattern)];
 
-extern mod core(vers = "0.7-pre");
 extern mod std(vers = "0.7-pre");
 extern mod syntax(vers = "0.7-pre");
 
-use core::*;
-use core::io::WriterUtil;
+use core::run;
 
 use syntax::{ast, fold, visit, codemap};
 use syntax::parse;

src/librust/rust.rc

@@ -20,8 +20,6 @@
 #[license = "MIT/ASL2"];
 #[crate_type = "lib"];
 
-extern mod core(vers = "0.7-pre");
-
 use core::run;
 
 enum ValidUsage {

src/librustc/back/link.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use back::rpath;
 use driver::session::Session;
 use driver::session;
@@ -22,17 +20,12 @@ use middle::trans::common::CrateContext;
 use middle::ty;
 use util::ppaux;
 
-use core::char;
 use core::hash::Streaming;
 use core::hash;
 use core::io::WriterUtil;
 use core::libc::{c_int, c_uint};
 use core::os::consts::{macos, freebsd, linux, android, win32};
-use core::os;
-use core::ptr;
 use core::run;
-use core::str;
-use core::vec;
 use syntax::ast;
 use syntax::ast_map::{path, path_mod, path_name};
 use syntax::attr;
@@ -98,10 +91,7 @@ pub mod jit {
     use lib::llvm::{ModuleRef, PassManagerRef};
     use metadata::cstore;
 
-    use core::cast;
     use core::libc::c_int;
-    use core::ptr;
-    use core::str;
 
     pub mod rusti {
         #[nolink]
@@ -183,10 +173,8 @@ pub mod write {
     use lib::llvm::{False, ModuleRef, mk_pass_manager, mk_target_data};
     use lib;
 
-    use core::prelude::*;
     use core::libc::{c_int, c_uint};
     use core::path::Path;
-    use core::str;
     use core::run;
 
     pub fn is_object_or_assembly_or_exe(ot: output_type) -> bool {

src/librustc/back/rpath.rs

@@ -8,16 +8,11 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use driver::session;
 use metadata::cstore;
 use metadata::filesearch;
 
-use core::os;
-use core::uint;
 use core::util;
-use core::vec;
 use core::hashmap::HashSet;
 
 fn not_win32(os: session::os) -> bool {
@@ -201,7 +196,6 @@ mod test {
     // FIXME(#2119): the outer attribute should be #[cfg(unix, test)], then
     // these redundant #[cfg(test)] blocks can be removed
     #[cfg(test)]
-    use core::prelude::*;
     #[cfg(test)]
     use back::rpath::{get_absolute_rpath, get_install_prefix_rpath};
     #[cfg(test)]

src/librustc/driver/driver.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use back::link;
 use back::{arm, x86, x86_64, mips};
 use driver::session::{Aggressive};
@@ -893,8 +891,6 @@ pub fn list_metadata(sess: Session, path: &Path, out: @io::Writer) {
 
 #[cfg(test)]
 mod test {
-    use core::prelude::*;
-
     use driver::driver::{build_configuration, build_session};
     use driver::driver::{build_session_options, optgroups, str_input};
 

src/librustc/driver/session.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use back::link;
 use back::target_strs;
 use back;

src/librustc/front/config.rs

@@ -8,13 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use syntax::{ast, fold, attr};
 
-use core::option;
-use core::vec;
-
 type in_cfg_pred = @fn(attrs: ~[ast::attribute]) -> bool;
 
 struct Context {

src/librustc/front/core_inject.rs

@@ -8,11 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use driver::session::Session;
 
-use core::vec;
 use syntax::ast;
 use syntax::attr;
 use syntax::codemap;

src/librustc/front/intrinsic_inject.rs

@@ -8,15 +8,11 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use driver::session::Session;
 use syntax::parse;
 use syntax::ast;
 use syntax::codemap::spanned;
 
-use core::vec;
-
 pub fn inject_intrinsic(sess: Session, crate: @ast::crate) -> @ast::crate {
     let intrinsic_module = @(include_str!("intrinsic.rs").to_owned());
 

src/librustc/front/test.rs

@@ -10,12 +10,9 @@
 
 // Code that generates a test runner to run all the tests in a crate
 
-use core::prelude::*;
-
 use driver::session;
 use front::config;
 
-use core::vec;
 use syntax::ast_util::*;
 use syntax::attr;
 use syntax::codemap::{dummy_sp, span, ExpandedFrom, CallInfo, NameAndSpan};

src/librustc/lib/llvm.rs

@@ -8,14 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use core::hashmap::HashMap;
 use core::libc::c_uint;
-use core::option;
-use core::ptr;
-use core::str;
-use core::vec;
 
 pub type Opcode = u32;
 pub type Bool = c_uint;

src/librustc/metadata/creader.rs

@@ -11,15 +11,12 @@
 
 //! Validates all used crates and extern libraries and loads their metadata
 
-use core::prelude::*;
-
 use metadata::cstore;
 use metadata::decoder;
 use metadata::filesearch::FileSearch;
 use metadata::loader;
 
 use core::hashmap::HashMap;
-use core::vec;
 use syntax::attr;
 use syntax::codemap::{span, dummy_sp};
 use syntax::diagnostic::span_handler;

src/librustc/metadata/csearch.rs

@@ -8,18 +8,14 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-
 // Searching for information from the cstore
 
-use core::prelude::*;
-
 use metadata::common::*;
 use metadata::cstore;
 use metadata::decoder;
 use metadata;
 use middle::{ty, resolve};
 
-use core::vec;
 use reader = std::ebml::reader;
 use syntax::ast;
 use syntax::ast_map;

src/librustc/metadata/cstore.rs

@@ -12,13 +12,10 @@
 // The crate store - a central repo for information collected about external
 // crates and libraries
 
-use core::prelude::*;
-
 use metadata::cstore;
 use metadata::decoder;
 
 use core::hashmap::HashMap;
-use core::vec;
 use std;
 use syntax::ast;
 use syntax::parse::token::ident_interner;

src/librustc/metadata/decoder.rs

@@ -8,11 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-
 // Decoding metadata from a single crate's metadata
 
-use core::prelude::*;
-
 use metadata::cstore::crate_metadata;
 use metadata::common::*;
 use metadata::csearch::{ProvidedTraitMethodInfo, StaticMethodInfo};

src/librustc/metadata/encoder.rs

@@ -8,11 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-
 // Metadata encoding
 
-use core::prelude::*;
-
 use metadata::common::*;
 use metadata::cstore;
 use metadata::decoder;
@@ -26,13 +23,6 @@ use util::ppaux::ty_to_str;
 use core::flate;
 use core::hash::HashUtil;
 use core::hashmap::HashMap;
-use core::int;
-use core::io::{Writer, WriterUtil};
-use core::io;
-use core::str;
-use core::to_bytes::IterBytes;
-use core::uint;
-use core::vec;
 use std::serialize::Encodable;
 use std;
 use syntax::abi::AbiSet;

src/librustc/metadata/filesearch.rs

@@ -8,19 +8,10 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-
 // A module for searching for libraries
 // FIXME (#2658): I'm not happy how this module turned out. Should
 // probably just be folded into cstore.
 
-use core::prelude::*;
-
-use core::option;
-use core::os;
-use core::result::Result;
-use core::result;
-use core::str;
-
 pub type pick<'self, T> = &'self fn(path: &Path) -> Option<T>;
 
 pub fn pick_file(file: Path, path: &Path) -> Option<Path> {

src/librustc/metadata/loader.rs

@@ -11,8 +11,6 @@
 
 //! Finds crate binaries and loads their metadata
 
-use core::prelude::*;
-
 use lib::llvm::{False, llvm, mk_object_file, mk_section_iter};
 use metadata::decoder;
 use metadata::encoder;
@@ -24,16 +22,8 @@ use syntax::parse::token::ident_interner;
 use syntax::print::pprust;
 use syntax::{ast, attr};
 
-use core::cast;
 use core::flate;
-use core::io::WriterUtil;
-use core::io;
 use core::os::consts::{macos, freebsd, linux, android, win32};
-use core::option;
-use core::ptr;
-use core::str;
-use core::uint;
-use core::vec;
 
 pub enum os {
     os_macos,

src/librustc/metadata/tydecode.rs

@@ -14,13 +14,8 @@
 // tjc note: Would be great to have a `match check` macro equivalent
 // for some of these
 
-use core::prelude::*;
-
 use middle::ty;
 
-use core::str;
-use core::uint;
-use core::vec;
 use syntax::abi::AbiSet;
 use syntax::abi;
 use syntax::ast;

src/librustc/metadata/tyencode.rs

@@ -8,11 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-
 // Type encoding
 
-use core::prelude::*;
-
 use middle::ty::param_ty;
 use middle::ty;
 

src/librustc/middle/astencode.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use c = metadata::common;
 use cstore = metadata::cstore;
 use driver::session::Session;

src/librustc/middle/borrowck/check_loans.rs

@@ -17,8 +17,6 @@
 // 3. assignments do not affect things loaned out as immutable
 // 4. moves do not affect things loaned out in any way
 
-use core::prelude::*;
-
 use middle::moves;
 use middle::typeck::check::PurityState;
 use middle::borrowck::{Loan, bckerr, BorrowckCtxt, inherent_mutability};
@@ -33,7 +31,6 @@ use middle::ty;
 use util::ppaux::ty_to_str;
 
 use core::hashmap::HashSet;
-use core::uint;
 use core::util::with;
 use syntax::ast::m_mutbl;
 use syntax::ast;

src/librustc/middle/borrowck/gather_loans.rs

@@ -16,8 +16,6 @@
 // their associated scopes.  In phase two, checking loans, we will then make
 // sure that all of these loans are honored.
 
-use core::prelude::*;
-
 use middle::borrowck::preserve::{PreserveCondition, PcOk, PcIfPure};
 use middle::borrowck::{Loan, bckerr, bckres, BorrowckCtxt, err_mutbl};
 use middle::borrowck::{LoanKind, TotalFreeze, PartialFreeze,
@@ -32,7 +30,6 @@ use util::common::indenter;
 use util::ppaux::{Repr, region_to_str};
 
 use core::hashmap::{HashSet, HashMap};
-use core::vec;
 use syntax::ast::{m_const, m_imm, m_mutbl};
 use syntax::ast;
 use syntax::codemap::span;

src/librustc/middle/borrowck/loan.rs

@@ -41,8 +41,6 @@ FIXME #4730 --- much more needed, don't have time to write this all up now
 // Loan(Ex, M, S) = Ls holds if ToAddr(Ex) will remain valid for the entirety
 // of the scope S, presuming that the returned set of loans `Ls` are honored.
 
-use core::prelude::*;
-
 use middle::borrowck::{Loan, bckerr, bckres, BorrowckCtxt, err_mutbl};
 use middle::borrowck::{LoanKind, TotalFreeze, PartialFreeze,
                        TotalTake, PartialTake, Immobile};
@@ -55,7 +53,6 @@ use middle::mem_categorization::{gc_ptr, region_ptr};
 use middle::ty;
 use util::common::indenter;
 
-use core::result::{Err, Ok};
 use syntax::ast::m_imm;
 use syntax::ast;
 

src/librustc/middle/borrowck/mod.rs

@@ -224,8 +224,6 @@ Borrowck results in two maps.
   given a memory location and not used as immediates.
  */
 
-use core::prelude::*;
-
 use middle::mem_categorization::*;
 use middle::ty;
 use middle::typeck;
@@ -234,8 +232,6 @@ use util::common::stmt_set;
 use util::ppaux::note_and_explain_region;
 
 use core::hashmap::{HashSet, HashMap};
-use core::io;
-use core::result::{Result, Ok, Err};
 use core::to_bytes;
 use syntax::ast::{mutability, m_imm};
 use syntax::ast;

src/librustc/middle/borrowck/preserve.rs

@@ -13,8 +13,6 @@
 // the scope S.
 //
 
-use core::prelude::*;
-
 use middle::borrowck::{RootInfo, bckerr, bckerr_code, bckres, BorrowckCtxt};
 use middle::borrowck::{err_mut_uniq, err_mut_variant};
 use middle::borrowck::{err_out_of_root_scope, err_out_of_scope};

src/librustc/middle/check_const.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use driver::session::Session;
 use middle::resolve;
 use middle::ty;

src/librustc/middle/check_match.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use middle::const_eval::{compare_const_vals, lookup_const_by_id};
 use middle::const_eval::{eval_const_expr, const_val, const_bool};
 use middle::pat_util::*;
@@ -19,8 +17,6 @@ use middle::typeck::method_map;
 use middle::moves;
 use util::ppaux::ty_to_str;
 
-use core::uint;
-use core::vec;
 use std::sort;
 use syntax::ast::*;
 use syntax::ast_util::{unguarded_pat, walk_pat};

src/librustc/middle/const_eval.rs

@@ -8,15 +8,11 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use metadata::csearch;
 use middle::astencode;
 use middle::ty;
 use middle;
 
-use core::float;
-use core::vec;
 use syntax::{ast, ast_map, ast_util, visit};
 use syntax::ast::*;
 

src/librustc/middle/freevars.rs

@@ -8,12 +8,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-
 // A pass that annotates for each loops and functions with the free
 // variables that they contain.
 
-use core::prelude::*;
-
 use middle::resolve;
 use middle::ty;
 

src/librustc/middle/kind.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use middle::freevars::freevar_entry;
 use middle::freevars;
 use middle::liveness;

src/librustc/middle/lang_items.rs

@@ -8,7 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-
 // Detecting language items.
 //
 // Language items are items that represent concepts intrinsic to the language
@@ -20,8 +19,6 @@
 //
 // * Functions called by the compiler itself.
 
-use core::prelude::*;
-
 use driver::session::Session;
 use metadata::csearch::each_lang_item;
 use metadata::cstore::iter_crate_data;

src/librustc/middle/lint.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use driver::session::Session;
 use driver::session;
 use middle::ty;
@@ -17,20 +15,6 @@ use middle::pat_util;
 use util::ppaux::{ty_to_str};
 
 use core::hashmap::HashMap;
-use core::char;
-use core::cmp;
-use core::i8;
-use core::i16;
-use core::i32;
-use core::i64;
-use core::int;
-use core::str;
-use core::u8;
-use core::u16;
-use core::u32;
-use core::u64;
-use core::uint;
-use core::vec;
 use std::smallintmap::SmallIntMap;
 use syntax::attr;
 use syntax::codemap::span;

src/librustc/middle/liveness.rs

@@ -8,7 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-
 /*!
  * A classic liveness analysis based on dataflow over the AST.  Computes,
  * for each local variable in a function, whether that variable is live
@@ -103,7 +102,6 @@
  *   to return explicitly.
  */
 
-use core::prelude::*;
 
 use middle::lint::{unused_variable, dead_assignment};
 use middle::pat_util;
@@ -113,12 +111,6 @@ use middle::moves;
 use util::ppaux::ty_to_str;
 
 use core::hashmap::HashMap;
-use core::io::WriterUtil;
-use core::io;
-use core::ptr;
-use core::to_str;
-use core::uint;
-use core::vec;
 use core::util::with;
 use syntax::ast::*;
 use syntax::codemap::span;

src/librustc/middle/mem_categorization.rs

@@ -8,7 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-
 /*!
  * # Categorization
  *
@@ -47,14 +46,11 @@
  * then an index to jump forward to the relevant item.
  */
 
-use core::prelude::*;
-
 use middle::ty;
 use middle::typeck;
 use util::ppaux::{ty_to_str, region_to_str};
 use util::common::indenter;
 
-use core::uint;
 use syntax::ast::{m_imm, m_const, m_mutbl};
 use syntax::ast;
 use syntax::codemap::span;

src/librustc/middle/moves.rs

@@ -206,8 +206,6 @@ and so on.
 
 */
 
-use core::prelude::*;
-
 use middle::pat_util::{pat_bindings};
 use middle::freevars;
 use middle::ty;
@@ -216,7 +214,6 @@ use util::ppaux;
 use util::common::indenter;
 
 use core::hashmap::{HashSet, HashMap};
-use core::vec;
 use syntax::ast::*;
 use syntax::ast_util;
 use syntax::visit;

src/librustc/middle/pat_util.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use middle::resolve;
 
 use core::hashmap::HashMap;

src/librustc/middle/privacy.rs

@@ -8,12 +8,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-
 // A pass that checks to make sure private fields and methods aren't used
 // outside their scopes.
 
-use core::prelude::*;
-
 use metadata::csearch;
 use middle::ty::{ty_struct, ty_enum};
 use middle::ty;

src/librustc/middle/region.rs

@@ -17,8 +17,6 @@ region parameterized.
 
 */
 
-use core::prelude::*;
-
 use driver::session::Session;
 use metadata::csearch;
 use middle::resolve;
@@ -27,7 +25,6 @@ use middle::ty::{rv_contravariant, FreeRegion};
 use middle::ty;
 
 use core::hashmap::{HashMap, HashSet};
-use core::vec;
 use syntax::ast_map;
 use syntax::codemap::span;
 use syntax::print::pprust;

src/librustc/middle/resolve.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use driver::session;
 use driver::session::Session;
 use metadata::csearch::{each_path, get_trait_method_def_ids};
@@ -23,8 +21,6 @@ use middle::lint::{allow, level, unused_imports};
 use middle::lint::{get_lint_level, get_lint_settings_level};
 use middle::pat_util::pat_bindings;
 
-use core::str;
-use core::vec;
 use syntax::ast::{RegionTyParamBound, TraitTyParamBound, _mod, add, arm};
 use syntax::ast::{binding_mode, bitand, bitor, bitxor, blk};
 use syntax::ast::{bind_infer, bind_by_ref, bind_by_copy};

src/librustc/middle/subst.rs

@@ -10,7 +10,6 @@
 
 // Type substitutions.
 
-use core::prelude::*;
 use middle::ty;
 use util::ppaux::Repr;
 

src/librustc/middle/trans/_match.rs

@@ -142,8 +142,6 @@
  *
  */
 
-use core::prelude::*;
-
 use back::abi;
 use lib::llvm::{llvm, ValueRef, BasicBlockRef};
 use middle::const_eval;

src/librustc/middle/trans/asm.rs

@@ -12,8 +12,6 @@
 # Translation of inline assembly.
 */
 
-use core::prelude::*;
-
 use lib;
 use middle::trans::build::*;
 use middle::trans::callee;

src/librustc/middle/trans/base.rs

@@ -23,8 +23,6 @@
 //     but many TypeRefs correspond to one ty::t; for instance, tup(int, int,
 //     int) and rec(x=int, y=int, z=int) will have the same TypeRef.
 
-use core::prelude::*;
-
 use back::link::{mangle_exported_name};
 use back::{link, abi, upcall};
 use driver::session;
@@ -68,10 +66,7 @@ use util::ppaux;
 
 use core::hash;
 use core::hashmap::{HashMap, HashSet};
-use core::int;
-use core::io;
 use core::libc::c_uint;
-use core::uint;
 use std::time;
 use syntax::ast::ident;
 use syntax::ast_map::{path, path_elt_to_str, path_name};

src/librustc/middle/trans/build.rs

@@ -16,15 +16,8 @@ use lib;
 use middle::trans::common::*;
 use syntax::codemap::span;
 
-use core::prelude::*;
-use core::cast;
 use core::hashmap::HashMap;
 use core::libc::{c_uint, c_ulonglong, c_char};
-use core::libc;
-use core::option::Some;
-use core::ptr;
-use core::str;
-use core::vec;
 
 pub fn terminate(cx: block, _: &str) {
     cx.terminated = true;
@@ -174,7 +167,7 @@ pub fn IndirectBr(cx: block, Addr: ValueRef, NumDests: uint) {
 
 // This is a really awful way to get a zero-length c-string, but better (and a
 // lot more efficient) than doing str::as_c_str("", ...) every time.
-pub fn noname() -> *libc::c_char {
+pub fn noname() -> *c_char {
     unsafe {
         static cnull: uint = 0u;
         return cast::transmute(ptr::addr_of(&cnull));
@@ -618,7 +611,7 @@ pub fn StructGEP(cx: block, Pointer: ValueRef, Idx: uint) -> ValueRef {
     }
 }
 
-pub fn GlobalString(cx: block, _Str: *libc::c_char) -> ValueRef {
+pub fn GlobalString(cx: block, _Str: *c_char) -> ValueRef {
     unsafe {
         if cx.unreachable { return llvm::LLVMGetUndef(T_ptr(T_i8())); }
         count_insn(cx, "globalstring");
@@ -626,7 +619,7 @@ pub fn GlobalString(cx: block, _Str: *libc::c_char) -> ValueRef {
     }
 }
 
-pub fn GlobalStringPtr(cx: block, _Str: *libc::c_char) -> ValueRef {
+pub fn GlobalStringPtr(cx: block, _Str: *c_char) -> ValueRef {
     unsafe {
         if cx.unreachable { return llvm::LLVMGetUndef(T_ptr(T_i8())); }
         count_insn(cx, "globalstringptr");

src/librustc/middle/trans/cabi_mips.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::{ptr, vec, uint};
-use core::option::*;
 use core::libc::c_uint;
 use lib::llvm::{llvm, TypeRef, Integer, Pointer, Float, Double};
 use lib::llvm::{Struct, Array, Attribute};

src/librustc/middle/trans/cabi_x86.rs

@@ -9,7 +9,6 @@
 // except according to those terms.
 
 use driver::session::{os_win32, os_macos};
-use core::option::*;
 use lib::llvm::*;
 use lib::llvm::llvm::*;
 use super::cabi::*;

src/librustc/middle/trans/callee.rs

@@ -16,8 +16,6 @@
 // and methods are represented as just a fn ptr and not a full
 // closure.
 
-use core::prelude::*;
-
 use back::abi;
 use driver::session;
 use lib;

src/librustc/middle/trans/closure.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use back::abi;
 use back::link::{mangle_internal_name_by_path_and_seq};
 use lib::llvm::{llvm, ValueRef};

src/librustc/middle/trans/common.rs

@@ -14,8 +14,6 @@
 
 */
 
-use core::prelude::*;
-
 use back::{abi, upcall};
 use driver::session;
 use driver::session::Session;
@@ -43,15 +41,11 @@ use middle::ty;
 use middle::typeck;
 use util::ppaux::{Repr};
 
-use core::cast;
 use core::hash;
 use core::hashmap::{HashMap, HashSet};
 use core::libc::{c_uint, c_longlong, c_ulonglong};
-use core::ptr;
-use core::str;
 use core::to_bytes;
 use core::vec::raw::to_ptr;
-use core::vec;
 use syntax::ast::ident;
 use syntax::ast_map::{path, path_elt};
 use syntax::codemap::span;

src/librustc/middle/trans/consts.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use back::abi;
 use lib::llvm::{llvm, SetLinkage, PrivateLinkage,
                 ValueRef, TypeRef, Bool, True, False};

src/librustc/middle/trans/controlflow.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use back::link;
 use lib;
 use lib::llvm::*;
@@ -24,7 +22,6 @@ use middle::ty;
 use util::common::indenter;
 use util::ppaux;
 
-use core::str;
 use syntax::ast;
 use syntax::ast::ident;
 use syntax::ast_map::path_mod;

src/librustc/middle/trans/datum.rs

@@ -85,8 +85,6 @@
  * methods themselves.  Most are only suitable for some types of
  * values. */
 
-use core::prelude::*;
-
 use lib;
 use lib::llvm::ValueRef;
 use middle::borrowck::{RootInfo, root_map_key};
@@ -106,7 +104,6 @@ use util::ppaux::ty_to_str;
 
 use core::container::Set; // XXX: this should not be necessary
 use core::to_bytes;
-use core::uint;
 use syntax::ast;
 use syntax::parse::token::special_idents;
 

src/librustc/middle/trans/debuginfo.rs

@@ -8,7 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
 
 use driver::session;
 use lib::llvm::ValueRef;
@@ -22,8 +21,6 @@ use util::ppaux::ty_to_str;
 
 use core::hashmap::HashMap;
 use core::libc;
-use core::option;
-use core::sys;
 use syntax::codemap::span;
 use syntax::parse::token::ident_interner;
 use syntax::{ast, codemap, ast_util, ast_map};

src/librustc/middle/trans/expr.rs

@@ -119,8 +119,6 @@ lvalues are *never* stored by value.
 
 */
 
-use core::prelude::*;
-
 use back::abi;
 use lib;
 use lib::llvm::{ValueRef, TypeRef, llvm};

src/librustc/middle/trans/foreign.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use back::{link, abi};
 use lib::llvm::{SequentiallyConsistent, Acquire, Release, Xchg};
 use lib::llvm::{TypeRef, ValueRef};

src/librustc/middle/trans/glue.rs

@@ -12,8 +12,6 @@
 //
 // Code relating to taking, dropping, etc as well as type descriptors.
 
-use core::prelude::*;
-
 use back::abi;
 use back::link::*;
 use driver::session;
@@ -35,9 +33,7 @@ use middle::ty;
 use util::ppaux;
 use util::ppaux::ty_to_short_str;
 
-use core::io;
 use core::libc::c_uint;
-use core::str;
 use std::time;
 use syntax::ast;
 

src/librustc/middle/trans/inline.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use metadata::csearch;
 use middle::astencode;
 use middle::trans::base::{get_insn_ctxt};
@@ -19,7 +17,6 @@ use middle::trans::common::*;
 use middle::ty;
 use util::ppaux::ty_to_str;
 
-use core::vec;
 use syntax::ast;
 use syntax::ast_map::path_name;
 use syntax::ast_util::local_def;

src/librustc/middle/trans/machine.rs

@@ -10,8 +10,6 @@
 
 // Information concerning the machine representation of various types.
 
-use core::prelude::*;
-
 use lib::llvm::{ValueRef, TypeRef};
 use lib::llvm::False;
 use lib::llvm::llvm;

src/librustc/middle/trans/meth.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use back::abi;
 use lib::llvm::llvm;
 use lib::llvm::ValueRef;

src/librustc/middle/trans/monomorphize.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use back::link::mangle_exported_name;
 use driver::session;
 use lib::llvm::ValueRef;
@@ -32,7 +30,6 @@ use middle::ty::{FnSig};
 use middle::typeck;
 use util::ppaux::Repr;
 
-use core::vec;
 use syntax::ast;
 use syntax::ast_map;
 use syntax::ast_map::path_name;

src/librustc/middle/trans/reachable.rs

@@ -20,7 +20,6 @@ use middle::resolve;
 use middle::ty;
 use middle::typeck;
 
-use core::prelude::*;
 use core::hashmap::HashSet;
 use syntax::ast;
 use syntax::ast::*;

src/librustc/middle/trans/type_of.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use lib::llvm::llvm;
 use lib::llvm::{TypeRef};
 use middle::trans::adt;
@@ -19,7 +17,6 @@ use middle::trans::common;
 use middle::ty;
 use util::ppaux;
 
-use core::option::None;
 use syntax::ast;
 
 pub fn arg_is_indirect(ccx: @CrateContext, arg: &ty::arg) -> bool {

src/librustc/middle/trans/type_use.rs

@@ -27,8 +27,6 @@
 // much information, but have the disadvantage of being very
 // invasive.)
 
-use core::prelude::*;
-
 use middle::freevars;
 use middle::trans::common::*;
 use middle::trans::inline;

src/librustc/middle/ty.rs

@@ -8,7 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
 
 use driver::session;
 use metadata::csearch;
@@ -29,15 +28,8 @@ use util::ppaux::Repr;
 use util::common::{indenter};
 
 use core;
-use core::cast;
-use core::cmp;
-use core::ops;
 use core::ptr::to_unsafe_ptr;
-use core::result::Result;
-use core::result;
 use core::to_bytes;
-use core::uint;
-use core::vec;
 use core::hashmap::{HashMap, HashSet};
 use std::smallintmap::SmallIntMap;
 use syntax::ast::*;

src/librustc/middle/typeck/astconv.rs

@@ -52,8 +52,6 @@
  * an rptr (`&r.T`) use the region `r` that appears in the rptr.
  */
 
-use core::prelude::*;
-
 use middle::const_eval;
 use middle::ty::{arg, substs};
 use middle::ty::{ty_param_substs_and_ty};
@@ -62,8 +60,6 @@ use middle::typeck::rscope::in_binding_rscope;
 use middle::typeck::rscope::{region_scope, RegionError};
 use middle::typeck::rscope::RegionParamNames;
 
-use core::result;
-use core::vec;
 use syntax::abi::AbiSet;
 use syntax::{ast, ast_util};
 use syntax::codemap::span;

src/librustc/middle/typeck/check/_match.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use middle::pat_util::{PatIdMap, pat_id_map, pat_is_binding, pat_is_const};
 use middle::ty;
 use middle::typeck::check::demand;
@@ -19,7 +17,6 @@ use middle::typeck::check::{structure_of, valid_range_bounds};
 use middle::typeck::require_same_types;
 
 use core::hashmap::{HashMap, HashSet};
-use core::vec;
 use syntax::ast;
 use syntax::ast_util;
 use syntax::codemap::span;

src/librustc/middle/typeck/check/method.rs

@@ -79,8 +79,6 @@ obtained the type `Foo`, we would never match this method.
 
 */
 
-use core::prelude::*;
-
 use middle::resolve;
 use middle::ty::*;
 use middle::ty;
@@ -96,9 +94,6 @@ use middle::typeck::check::regionmanip::replace_bound_regions_in_fn_sig;
 use util::common::indenter;
 
 use core::hashmap::HashSet;
-use core::result;
-use core::uint;
-use core::vec;
 use std::list::Nil;
 use syntax::ast::{def_id, sty_value, sty_region, sty_box};
 use syntax::ast::{sty_uniq, sty_static, node_id, by_copy, by_ref};

src/librustc/middle/typeck/check/mod.rs

@@ -76,8 +76,6 @@ type parameter).
 
 */
 
-use core::prelude::*;
-
 use middle::const_eval;
 use middle::pat_util::pat_id_map;
 use middle::pat_util;
@@ -110,11 +108,6 @@ use util::ppaux::{bound_region_to_str};
 use util::ppaux;
 
 use core::hashmap::HashMap;
-use core::ptr;
-use core::result::{Result, Ok, Err};
-use core::result;
-use core::str;
-use core::vec;
 use core::util::replace;
 use std::list::Nil;
 use syntax::abi::AbiSet;

src/librustc/middle/typeck/check/regionck.rs

@@ -27,8 +27,6 @@ this point a bit better.
 
 */
 
-use core::prelude::*;
-
 use middle::freevars::get_freevars;
 use middle::pat_util::pat_bindings;
 use middle::ty::{re_scope};
@@ -41,7 +39,6 @@ use middle::typeck::infer::resolve_type;
 use util::ppaux::{note_and_explain_region, ty_to_str,
                   region_to_str};
 
-use core::result;
 use syntax::ast::{ManagedSigil, OwnedSigil, BorrowedSigil};
 use syntax::ast::{def_arg, def_binding, def_local, def_self, def_upvar};
 use syntax::ast;
@@ -688,7 +685,6 @@ pub mod guarantor {
      * but more special purpose.
      */
 
-    use core::prelude::*;
     use middle::typeck::check::regionck::{Rcx, infallibly_mk_subr};
     use middle::ty;
     use syntax::ast;

src/librustc/middle/typeck/check/regionmanip.rs

@@ -10,8 +10,6 @@
 
 // #[warn(deprecated_mode)];
 
-use core::prelude::*;
-
 use middle::ty;
 
 use middle::typeck::isr_alist;

src/librustc/middle/typeck/check/vtable.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use middle::resolve::Impl;
 use middle::ty::param_ty;
 use middle::ty;
@@ -25,9 +23,6 @@ use util::common::indenter;
 use util::ppaux::tys_to_str;
 use util::ppaux;
 
-use core::result::{Ok, Err};
-use core::result;
-use core::uint;
 use core::hashmap::HashSet;
 use syntax::ast;
 use syntax::ast_util;

src/librustc/middle/typeck/check/writeback.rs

@@ -12,8 +12,6 @@
 // unresolved type variables and replaces "ty_var" types with their
 // substitutions.
 
-use core::prelude::*;
-
 use middle::pat_util;
 use middle::ty::arg;
 use middle::ty;
@@ -27,8 +25,6 @@ use middle::typeck::write_substs_to_tcx;
 use middle::typeck::write_ty_to_tcx;
 use util::ppaux;
 
-use core::result::{Ok, Err};
-use core::vec;
 use syntax::ast;
 use syntax::codemap::span;
 use syntax::print::pprust::pat_to_str;

src/librustc/middle/typeck/coherence.rs

@@ -14,7 +14,6 @@
 // has at most one implementation for each type. Then we build a mapping from
 // each trait in the system to its implementations.
 
-use core::prelude::*;
 
 use driver;
 use metadata::csearch::{each_path, get_impl_traits};

src/librustc/middle/typeck/collect.rs

@@ -30,8 +30,6 @@ are represented as `ty_param()` instances.
 
 */
 
-use core::prelude::*;
-
 use metadata::csearch;
 use middle::ty::{substs, ty_param_bounds_and_ty};
 use middle::ty;
@@ -46,7 +44,6 @@ use middle::typeck::{CrateCtxt, lookup_def_tcx, no_params, write_ty_to_tcx};
 use util::common::{indenter, pluralize};
 use util::ppaux;
 
-use core::vec;
 use syntax::abi::AbiSet;
 use syntax::ast::{RegionTyParamBound, TraitTyParamBound};
 use syntax::ast;

src/librustc/middle/typeck/infer/coercion.rs

@@ -64,8 +64,6 @@ we may want to adjust precisely when coercions occur.
 
 */
 
-use core::prelude::*;
-
 use middle::ty::{AutoPtr, AutoBorrowVec, AutoBorrowFn};
 use middle::ty::{AutoDerefRef, AutoRef};
 use middle::ty::{vstore_slice, vstore_box, vstore_uniq};

src/librustc/middle/typeck/infer/combine.rs

@@ -54,8 +54,6 @@
 // terms of error reporting, although we do not do that properly right
 // now.
 
-use core::prelude::*;
-
 use middle::ty::{FloatVar, FnSig, IntVar, TyVar};
 use middle::ty::{IntType, UintType, arg, substs};
 use middle::ty;
@@ -67,7 +65,6 @@ use middle::typeck::infer::{cres, InferCtxt, ures, IntType, UintType};
 use util::common::indent;
 
 use core::result::{iter_vec2, map_vec2};
-use core::vec;
 use syntax::ast::{Onceness, purity};
 use syntax::ast;
 use syntax::opt_vec;

src/librustc/middle/typeck/infer/glb.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use middle::ty::RegionVid;
 use middle::ty;
 use middle::typeck::infer::combine::*;

src/librustc/middle/typeck/infer/lattice.rs

@@ -32,8 +32,6 @@
  * a lattice.
  */
 
-use core::prelude::*;
-
 use middle::ty::{RegionVid, TyVar, Vid};
 use middle::ty;
 use middle::typeck::isr_alist;

src/librustc/middle/typeck/infer/lub.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use middle::ty::RegionVid;
 use middle::ty;
 use middle::typeck::infer::combine::*;

src/librustc/middle/typeck/infer/mod.rs

@@ -242,8 +242,6 @@ section on "Type Combining" below for details.
 
 */
 
-use core::prelude::*;
-
 pub use middle::ty::IntVarValue;
 pub use middle::typeck::infer::resolve::resolve_and_force_all_but_regions;
 pub use middle::typeck::infer::resolve::{force_all, not_regions};
@@ -267,10 +265,6 @@ use middle::typeck::isr_alist;
 use util::common::indent;
 use util::ppaux::{bound_region_to_str, ty_to_str, trait_ref_to_str};
 
-use core::cmp::Eq;
-use core::result::{Result, Ok, Err};
-use core::result;
-use core::vec;
 use std::list::Nil;
 use std::smallintmap::SmallIntMap;
 use syntax::ast::{m_imm, m_mutbl};

src/librustc/middle/typeck/infer/region_inference.rs

@@ -536,8 +536,6 @@ more convincing in the future.
 
 */
 
-use core::prelude::*;
-
 use middle::ty;
 use middle::ty::{FreeRegion, Region, RegionVid};
 use middle::ty::{re_static, re_infer, re_free, re_bound};
@@ -548,10 +546,7 @@ use util::ppaux::note_and_explain_region;
 
 use core::cell::{Cell, empty_cell};
 use core::hashmap::{HashMap, HashSet};
-use core::result::{Err, Ok};
 use core::to_bytes;
-use core::uint;
-use core::vec;
 use syntax::codemap::span;
 use syntax::ast;
 

src/librustc/middle/typeck/infer/resolve.rs

@@ -46,8 +46,6 @@
 // future).  If you want to resolve everything but one type, you are
 // probably better off writing `resolve_all - resolve_ivar`.
 
-use core::prelude::*;
-
 use middle::ty::{FloatVar, FloatVid, IntVar, IntVid, RegionVid, TyVar, TyVid};
 use middle::ty::{type_is_bot, IntType, UintType};
 use middle::ty;
@@ -60,8 +58,6 @@ use util::ppaux::ty_to_str;
 
 use syntax::ast;
 
-use core::vec;
-
 pub static resolve_nested_tvar: uint = 0b0000000001;
 pub static resolve_rvar: uint        = 0b0000000010;
 pub static resolve_ivar: uint        = 0b0000000100;

src/librustc/middle/typeck/infer/sub.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use middle::ty;
 use middle::ty::TyVar;
 use middle::typeck::check::regionmanip::replace_bound_regions_in_fn_sig;
@@ -29,7 +27,6 @@ use syntax::ast;
 use syntax::ast::{Onceness, m_const, purity};
 use syntax::codemap::span;
 
-
 pub struct Sub(CombineFields);  // "subtype", "subregion" etc
 
 impl Combine for Sub {

src/librustc/middle/typeck/infer/test.rs

@@ -16,8 +16,6 @@ Note: This module is only compiled when doing unit testing.
 
 */
 
-use core::prelude::*;
-
 use driver::diagnostic;
 use driver::driver::{optgroups, build_session_options, build_session};
 use driver::driver::{str_input, build_configuration};

src/librustc/middle/typeck/infer/to_str.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use middle::ty::{FnSig, Vid};
 use middle::ty::IntVarValue;
 use middle::ty;
@@ -20,9 +18,6 @@ use util::ppaux::{mt_to_str, ty_to_str, trait_ref_to_str};
 
 use syntax::ast;
 
-use core::uint;
-use core::str;
-
 pub trait InferStr {
     fn inf_str(&self, cx: &InferCtxt) -> ~str;
 }

src/librustc/middle/typeck/infer/unify.rs

@@ -8,7 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
 use std::smallintmap::SmallIntMap;
 
 use middle::ty::{Vid, expected_found, IntVarValue};

src/librustc/middle/typeck/mod.rs

@@ -48,8 +48,6 @@ independently:
 
 */
 
-use core::prelude::*;
-
 use driver::session;
 
 use middle::resolve;
@@ -59,8 +57,6 @@ use util::ppaux::Repr;
 use util::ppaux;
 
 use core::hashmap::HashMap;
-use core::result;
-use core::vec;
 use std::list::List;
 use std::list;
 use syntax::codemap::span;

src/librustc/middle/typeck/rscope.rs

@@ -8,12 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use middle::ty;
 
-use core::result::Result;
-use core::result;
 use syntax::ast;
 use syntax::codemap::span;
 use syntax::opt_vec::OptVec;

src/librustc/rustc.rc

@@ -8,7 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-
 #[link(name = "rustc",
        vers = "0.7-pre",
        uuid = "0ce89b41-2f92-459e-bbc1-8f5fe32f16cf",
@@ -23,13 +22,9 @@
 #[deny(deprecated_pattern)];
 #[deny(deprecated_mode)];
 
-#[no_core];
-
-extern mod core(vers = "0.7-pre");
 extern mod std(vers = "0.7-pre");
 extern mod syntax(vers = "0.7-pre");
 
-use core::prelude::*;
 
 use driver::driver::{host_triple, optgroups, early_error};
 use driver::driver::{str_input, file_input, build_session_options};
@@ -39,8 +34,6 @@ use driver::driver::{compile_input};
 use driver::session;
 use middle::lint;
 
-use core::io::ReaderUtil;
-use core::result::{Ok, Err};
 use std::getopts::{groups, opt_present};
 use std::getopts;
 use syntax::codemap;

src/librustc/util/common.rs

@@ -8,14 +8,11 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use syntax::ast;
 use syntax::codemap::{span};
 use syntax::visit;
 
 use core::hashmap::HashSet;
-use core::str;
 use std;
 
 pub fn time<T>(do_it: bool, what: ~str, thunk: &fn() -> T) -> T {

src/librustc/util/ppaux.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::prelude::*;
-
 use middle::ty;
 use middle::typeck;
 use middle::ty::canon_mode;
@@ -33,9 +31,6 @@ use syntax::{ast, ast_util};
 use syntax::ast_map;
 use syntax::abi::AbiSet;
 
-use core::str;
-use core::vec;
-
 pub trait Repr {
     fn repr(&self, tcx: ctxt) -> ~str;
 }

src/librustdoc/astsrv.rs

@@ -17,8 +17,6 @@ query AST-related information, shielding the rest of Rustdoc from its
 non-sendableness.
 */
 
-use core::prelude::*;
-
 use parse;
 
 use core::cell::Cell;