Rename rustc::middle::unsafeck to fn_usage

I'm going to add further checks unrelated to unsafe.

Issue #1038

src/comp/driver/rustc.rs

@@ -5,7 +5,7 @@ import metadata::{creader, cstore};
 import syntax::parse::{parser, token};
 import syntax::{ast, codemap};
 import front::attr;
-import middle::{trans, resolve, freevars, kind, ty, typeck, unsafeck};
+import middle::{trans, resolve, freevars, kind, ty, typeck, fn_usage};
 import middle::tstate::ck;
 import syntax::print::{pp, pprust};
 import util::{ppaux, common, filesearch};
@@ -129,8 +129,8 @@ fn compile_input(sess: session::session, cfg: ast::crate_cfg, input: str,
              bind freevars::annotate_freevars(def_map, crate));
     let ty_cx = ty::mk_ctxt(sess, def_map, ext_map, ast_map, freevars);
     time(time_passes, "typechecking", bind typeck::check_crate(ty_cx, crate));
-    time(time_passes, "unsafechecking",
-         bind unsafeck::unsafeck_crate(ty_cx, crate));
+    time(time_passes, "function usage",
+         bind fn_usage::check_crate_fn_usage(ty_cx, crate));
     time(time_passes, "alt checking",
          bind middle::check_alt::check_crate(ty_cx, crate));
     if sess.get_opts().run_typestate {

src/comp/middle/unsafeck.rs → src/comp/middle/fn_usage.rs

@@ -3,22 +3,22 @@ import syntax::visit;
 import std::option::some;
 import syntax::print::pprust::{expr_to_str, path_to_str};
 
-export unsafeck_crate;
+export check_crate_fn_usage;
 
-type unsafe_ctx = {
+type fn_usage_ctx = {
     tcx: ty::ctxt,
     unsafe_fn_legal: bool
 };
 
-fn unsafeck_view_item(_vi: @ast::view_item,
-                      _ctx: unsafe_ctx,
-                      _v: visit::vt<unsafe_ctx>) {
+fn fn_usage_view_item(_vi: @ast::view_item,
+                      _ctx: fn_usage_ctx,
+                      _v: visit::vt<fn_usage_ctx>) {
     // Ignore paths that appear in use, import, etc
 }
 
-fn unsafeck_expr(expr: @ast::expr,
-                 ctx: unsafe_ctx,
-                 v: visit::vt<unsafe_ctx>) {
+fn fn_usage_expr(expr: @ast::expr,
+                 ctx: fn_usage_ctx,
+                 v: visit::vt<fn_usage_ctx>) {
     alt expr.node {
       ast::expr_path(path) {
         if !ctx.unsafe_fn_legal {
@@ -51,11 +51,11 @@ fn unsafeck_expr(expr: @ast::expr,
     }
 }
 
-fn unsafeck_crate(tcx: ty::ctxt, crate: @ast::crate) {
+fn check_crate_fn_usage(tcx: ty::ctxt, crate: @ast::crate) {
     let visit =
         visit::mk_vt(
-            @{visit_expr: unsafeck_expr,
-              visit_view_item: unsafeck_view_item
+            @{visit_expr: fn_usage_expr,
+              visit_view_item: fn_usage_view_item
                   with *visit::default_visitor()});
     let ctx = {tcx: tcx, unsafe_fn_legal: false};
     visit::visit_crate(*crate, ctx, visit);

src/comp/rustc.rc

@@ -25,7 +25,7 @@ mod middle {
     mod ast_map;
     mod resolve;
     mod typeck;
-    mod unsafeck;
+    mod fn_usage;
     mod check_alt;
     mod mut;
     mod alias;