Fix #889: Add warnings about unused imports

src/comp/back/link.rs

@@ -7,23 +7,18 @@ import metadata::{encoder, cstore};
 import middle::trans_common::crate_ctxt;
 import std::str;
 import std::fs;
-import std::os;
 import std::vec;
 import std::option;
 import std::run;
 import option::some;
 import option::none;
 import std::sha1::sha1;
-import std::sort;
 import syntax::ast;
 import syntax::print::pprust;
 import lib::llvm::llvm::ModuleRef;
-import lib::llvm::llvm::ValueRef;
 import lib::llvm::mk_pass_manager;
 import lib::llvm::mk_target_data;
-import lib::llvm::mk_type_names;
 import lib::llvm::False;
-import lib::llvm::True;
 import util::filesearch;
 
 tag output_type {

src/comp/back/target_strs.rs

@@ -1,9 +1,7 @@
-import std::str;
-
 type t = {
     module_asm: str,
     meta_sect_name: str,
     data_layout: str,
     target_triple: str,
     gcc_args: [str]
-};
+};

src/comp/back/upcall.rs

@@ -1,11 +1,9 @@
 
-import std::str;
 import driver::session;
 import middle::trans;
-import trans::decl_cdecl_fn;
-import middle::trans_common::{T_f32, T_f64, T_fn, T_bool, T_i1, T_i8, T_i32,
-                              T_i64, T_int, T_vec, T_nil, T_opaque_chan_ptr,
-                              T_opaque_vec, T_opaque_port_ptr, T_ptr,
+import middle::trans_common::{T_fn, T_i1, T_i8, T_i32,
+                              T_i64, T_int, T_nil,
+                              T_opaque_vec, T_ptr,
                               T_size_t, T_void, T_float};
 import lib::llvm::type_names;
 import lib::llvm::llvm::ModuleRef;

src/comp/back/x86.rs

@@ -1,6 +1,3 @@
-import lib::llvm::llvm;
-import lib::llvm::llvm::ModuleRef;
-import std::str;
 import driver::session;
 
 fn get_target_strs(target_os: session::os) -> target_strs::t {

src/comp/back/x86_64.rs

@@ -1,6 +1,3 @@
-import lib::llvm::llvm;
-import lib::llvm::llvm::ModuleRef;
-import std::str;
 import driver::session;
 
 fn get_target_strs(target_os: session::os) -> target_strs::t {

src/comp/driver/rustc.rs

@@ -2,20 +2,16 @@
 
 // -*- rust -*-
 import metadata::{creader, cstore};
-import syntax::parse::{parser, token};
+import syntax::parse::{parser};
 import syntax::{ast, codemap};
 import front::attr;
 import middle::{trans, resolve, freevars, kind, ty, typeck, fn_usage};
-import middle::tstate::ck;
 import syntax::print::{pp, pprust};
-import util::{ppaux, common, filesearch};
+import util::{ppaux, filesearch};
 import back::link;
-import lib::llvm;
-import std::{fs, option, str, vec, int, io, run, getopts, result};
-import std::map::mk_hashmap;
+import std::{option, str, vec, int, io, getopts, result};
 import std::option::{some, none};
 import std::getopts::{optopt, optmulti, optflag, optflagopt, opt_present};
-import back::link::output_type;
 import back::{x86, x86_64};
 
 tag pp_mode { ppm_normal; ppm_expanded; ppm_typed; ppm_identified; }

src/comp/driver/session.rs

@@ -3,7 +3,7 @@ import syntax::{ast, codemap};
 import syntax::ast::node_id;
 import codemap::span;
 import syntax::ast::ty_mach;
-import std::{uint, map, option, str};
+import std::{option};
 import std::option::{some, none};
 import syntax::parse::parser::parse_sess;
 import util::filesearch;

src/comp/front/attr.rs

@@ -1,8 +1,7 @@
 // Functions dealing with attributes and meta_items
 
-import std::{vec, str, map, option};
+import std::{vec, map, option};
 import syntax::{ast, ast_util};
-import util::common;
 import driver::session;
 
 export attr_meta;

src/comp/front/test.rs

@@ -1,6 +1,6 @@
 // Code that generates a test runner to run all the tests in a crate
 
-import std::{option, vec, str};
+import std::{option, vec};
 import syntax::{ast, ast_util};
 import syntax::ast_util::*;
 //import syntax::ast_util::dummy_sp;

src/comp/lib/llvm.rs

@@ -1,10 +1,8 @@
 import std::{vec, str, option};
 import std::str::sbuf;
 
-import llvm::{ModuleRef, ContextRef, TypeRef, TypeHandleRef, ValueRef,
-              BasicBlockRef, BuilderRef, ModuleProviderRef, MemoryBufferRef,
-              PassManagerRef, UseRef, TargetDataRef, Linkage, Attribute,
-              Visibility, CallConv, IntPredicate, RealPredicate, Opcode,
+import llvm::{TypeRef, MemoryBufferRef,
+              PassManagerRef, TargetDataRef,
               ObjectFileRef, SectionIteratorRef};
 
 type ULongLong = u64;

src/comp/metadata/creader.rs

@@ -4,11 +4,9 @@ import driver::session;
 import syntax::{ast, ast_util};
 import lib::llvm::{False, llvm, mk_object_file, mk_section_iter};
 import front::attr;
-import middle::resolve;
 import syntax::visit;
 import syntax::codemap::span;
-import back::x86;
-import util::{common, filesearch};
+import util::{filesearch};
 import std::{vec, str, fs, io, option};
 import std::option::{none, some};
 import std::map::{hashmap, new_int_hash};

src/comp/metadata/decoder.rs

@@ -1,13 +1,11 @@
 // Decoding metadata from a single crate's metadata
 
 import std::{ebml, vec, option, str, io};
-import std::map::hashmap;
 import syntax::{ast, ast_util};
 import front::attr;
 import middle::ty;
 import common::*;
 import tydecode::{parse_def_id, parse_ty_data};
-import driver::session;
 import syntax::print::pprust;
 import cstore;
 

src/comp/metadata/encoder.rs

@@ -1,7 +1,6 @@
 // Metadata encoding
 
-import std::{vec, str, uint, io, option, ebml, map};
-import std::option::{some, none};
+import std::{vec, str, uint, io, ebml, map};
 import syntax::ast::*;
 import syntax::ast_util;
 import syntax::ast_util::local_def;

src/comp/metadata/tydecode.rs

@@ -1,6 +1,6 @@
 // Type decoding
 
-import std::{vec, str, uint, option};
+import std::{vec, str, uint};
 import std::option::{none, some};
 import syntax::ast;
 import syntax::ast::*;

src/comp/metadata/tyencode.rs

@@ -1,12 +1,11 @@
 // Type encoding
 
-import std::{str, io, int, uint};
+import std::{io, int, uint};
 import std::map::hashmap;
 import std::option::{some, none};
 import syntax::ast::*;
 import middle::ty;
 import syntax::print::pprust::*;
-import util::common;
 
 export ctxt;
 export ty_abbrev;

src/comp/middle/alias.rs

@@ -1,10 +1,10 @@
 
 import syntax::{ast, ast_util};
-import ast::{ident, fn_ident, node_id, def_id};
+import ast::{ident, fn_ident, node_id};
 import syntax::codemap::span;
 import syntax::visit;
 import visit::vt;
-import std::{vec, str, option};
+import std::{vec, option};
 import std::option::{some, none, is_none};
 
 // This is not an alias-analyser (though it would merit from becoming one, or

src/comp/middle/ast_map.rs

@@ -2,7 +2,6 @@ import std::{smallintmap, option};
 import syntax::ast::*;
 import syntax::ast_util;
 import syntax::{visit, codemap};
-import visit::vt;
 
 tag ast_node {
     node_item(@item);

src/comp/middle/check_const.rs

@@ -1,5 +1,4 @@
 import syntax::ast::*;
-import syntax::ast_util::{variant_def_ids, dummy_sp};
 import syntax::visit;
 
 fn check_crate(tcx: ty::ctxt, crate: @crate) {

src/comp/middle/fn_usage.rs

@@ -1,7 +1,7 @@
 import syntax::ast;
 import syntax::visit;
 import std::option::some;
-import syntax::print::pprust::{expr_to_str, path_to_str};
+import syntax::print::pprust::expr_to_str;
 
 export check_crate_fn_usage;
 

src/comp/middle/freevars.rs

@@ -1,11 +1,10 @@
 // A pass that annotates for each loops and functions with the free
 // variables that they contain.
 
-import std::{map, option, int, str};
+import std::{int};
 import std::map::*;
 import std::option::*;
 import syntax::{ast, ast_util, visit};
-import driver::session;
 import middle::resolve;
 import syntax::codemap::span;
 

src/comp/middle/gc.rs

@@ -1,13 +1,13 @@
 // Routines useful for garbage collection.
 
-import lib::llvm::{True, False};
+import lib::llvm::True;
 import lib::llvm::llvm::ValueRef;
 import middle::trans;
 import middle::trans::{get_tydesc, tps_normal};
 import middle::trans_common::*;
 import middle::ty;
-import std::option::{some, none};
-import std::{ptr, str, unsafe, vec};
+import std::option::none;
+import std::str;
 
 import lll = lib::llvm::llvm;
 import bld = trans_build;

src/comp/middle/kind.rs

@@ -85,7 +85,7 @@
 */
 
 import syntax::{ast, ast_util, visit, codemap};
-import std::{vec, option, str};
+import std::{vec, option};
 import ast::{kind, kind_unique, kind_shared, kind_pinned};
 
 fn kind_lteq(a: kind, b: kind) -> bool {