librustc: Stop parsing `fn@`, `fn~`, and `fn&`

21 files changed, 22 insertions, 113 deletions

diff --git a/src/librustc/middle/borrowck/check_loans.rs b/src/librustc/middle/borrowck/check_loans.rs
index c3555e54519..d6af2f78626 100644
--- a/src/librustc/middle/borrowck/check_loans.rs
+++ b/src/librustc/middle/borrowck/check_loans.rs
@@ -212,8 +212,8 @@ pub impl CheckLoanCtxt {
                     (*self.fn_args).contains(&(did.node));
                 if is_fn_arg { return; } // case (a) above
               }
-              ast::expr_fn_block(*) | ast::expr_fn(*) |
-              ast::expr_loop_body(*) | ast::expr_do_body(*) => {
+              ast::expr_fn_block(*) | ast::expr_loop_body(*) |
+              ast::expr_do_body(*) => {
                 if self.is_stack_closure(expr.id) {
                     // case (b) above
                     return;
@@ -244,7 +244,7 @@ pub impl CheckLoanCtxt {
     }
 
     // True if the expression with the given `id` is a stack closure.
-    // The expression must be an expr_fn(*) or expr_fn_block(*)
+    // The expression must be an expr_fn_block(*)
     fn is_stack_closure(@mut self, id: ast::node_id) -> bool {
         let fn_ty = ty::node_id_to_type(self.tcx(), id);
         match ty::get(fn_ty).sty {
@@ -262,10 +262,8 @@ pub impl CheckLoanCtxt {
             did.crate == ast::local_crate &&
                 (*self.fn_args).contains(&(did.node))
           }
-          ast::expr_fn_block(*) | ast::expr_fn(*) => {
-            self.is_stack_closure(expr.id)
-          }
-          _ => false
+          ast::expr_fn_block(*) => self.is_stack_closure(expr.id),
+          _ => false,
         };
     }
 
diff --git a/src/librustc/middle/check_loop.rs b/src/librustc/middle/check_loop.rs
index 15f64b0fa2f..74a79e5e560 100644
--- a/src/librustc/middle/check_loop.rs
+++ b/src/librustc/middle/check_loop.rs
@@ -38,12 +38,6 @@ pub fn check_crate(tcx: ty::ctxt, crate: @crate) {
               expr_loop(ref b, _) => {
                 (v.visit_block)(b, Context { in_loop: true,.. cx }, v);
               }
-              expr_fn(*) => {
-                visit::visit_expr(e, Context {
-                                        in_loop: false,
-                                        can_ret: true
-                                     }, v);
-              }
               expr_fn_block(_, ref b) => {
                 (v.visit_block)(b, Context {
                                          in_loop: false,
diff --git a/src/librustc/middle/freevars.rs b/src/librustc/middle/freevars.rs
index f26d5c7d11c..52520b59b44 100644
--- a/src/librustc/middle/freevars.rs
+++ b/src/librustc/middle/freevars.rs
@@ -49,12 +49,7 @@ fn collect_freevars(def_map: resolve::DefMap, blk: &ast::blk)
     let walk_expr: @fn(expr: @ast::expr, &&depth: int, v: visit::vt<int>) =
         |expr, depth, v| {
             match expr.node {
-              ast::expr_fn(_, _, _, _) => {
-                visit::visit_expr(expr, depth + 1, v);
-              }
-              ast::expr_fn_block(*) => {
-                visit::visit_expr(expr, depth + 1, v);
-              }
+              ast::expr_fn_block(*) => visit::visit_expr(expr, depth + 1, v),
               ast::expr_path(*) => {
                   let mut i = 0;
                   match def_map.find(&expr.id) {
diff --git a/src/librustc/middle/liveness.rs b/src/librustc/middle/liveness.rs
index 5286fa1025a..95f28578fec 100644
--- a/src/librustc/middle/liveness.rs
+++ b/src/librustc/middle/liveness.rs
@@ -570,7 +570,6 @@ fn visit_expr(expr: @expr, &&self: @mut IrMaps, vt: vt<@mut IrMaps>) {
         }
         visit::visit_expr(expr, self, vt);
       }
-      expr_fn(*) |
       expr_fn_block(*) => {
         // Interesting control flow (for loops can contain labeled
         // breaks or continues)
@@ -1123,8 +1122,8 @@ pub impl Liveness {
               self.propagate_through_expr(e, succ)
           }
 
-          expr_fn(_, _, ref blk, _) | expr_fn_block(_, ref blk) => {
-              debug!("%s is an expr_fn or expr_fn_block",
+          expr_fn_block(_, ref blk) => {
+              debug!("%s is an expr_fn_block",
                    expr_to_str(expr, self.tcx.sess.intr()));
 
               /*
@@ -1592,7 +1591,7 @@ fn check_expr(expr: @expr, &&self: @Liveness, vt: vt<@Liveness>) {
         visit::visit_expr(expr, self, vt);
       }
 
-      expr_fn(*) | expr_fn_block(*) => {
+      expr_fn_block(*) => {
         let caps = self.ir.captures(expr);
         for caps.each |cap| {
             let var = self.variable(cap.var_nid, expr.span);
@@ -1794,7 +1793,7 @@ pub impl @Liveness {
         }
 
         match move_expr.node {
-            expr_fn(*) | expr_fn_block(*) => {
+            expr_fn_block(*) => {
                 self.report_illegal_read(
                     move_expr.span, lnk, var, MovedValue);
                 let name = self.ir.variable_name(var);
diff --git a/src/librustc/middle/mem_categorization.rs b/src/librustc/middle/mem_categorization.rs
index 7a6a434c41f..bcbb2d6fd17 100644
--- a/src/librustc/middle/mem_categorization.rs
+++ b/src/librustc/middle/mem_categorization.rs
@@ -441,7 +441,7 @@ pub impl mem_categorization_ctxt {
 
           ast::expr_addr_of(*) | ast::expr_call(*) |
           ast::expr_swap(*) | ast::expr_assign(*) |
-          ast::expr_assign_op(*) | ast::expr_fn(*) | ast::expr_fn_block(*) |
+          ast::expr_assign_op(*) | ast::expr_fn_block(*) |
           ast::expr_assert(*) | ast::expr_ret(*) |
           ast::expr_loop_body(*) | ast::expr_do_body(*) |
           ast::expr_unary(*) | ast::expr_method_call(*) |
diff --git a/src/librustc/middle/moves.rs b/src/librustc/middle/moves.rs
index b9f35af37e0..c360b3a23e7 100644
--- a/src/librustc/middle/moves.rs
+++ b/src/librustc/middle/moves.rs
@@ -644,7 +644,6 @@ pub impl VisitContext {
                 self.use_expr(base, comp_mode, visitor);
             }
 
-            expr_fn(_, _, ref body, _) |
             expr_fn_block(_, ref body) => {
                 let cap_vars = self.compute_captures(expr.id);
                 self.move_maps.capture_map.insert(expr.id, cap_vars);
diff --git a/src/librustc/middle/resolve.rs b/src/librustc/middle/resolve.rs
index 648b7e49204..5298f6c632d 100644
--- a/src/librustc/middle/resolve.rs
+++ b/src/librustc/middle/resolve.rs
@@ -34,12 +34,12 @@ use syntax::ast::{def_local, def_mod, def_prim_ty, def_region, def_self};
 use syntax::ast::{def_self_ty, def_static_method, def_struct, def_ty};
 use syntax::ast::{def_ty_param, def_typaram_binder};
 use syntax::ast::{def_upvar, def_use, def_variant, expr, expr_assign_op};
-use syntax::ast::{expr_binary, expr_break, expr_cast, expr_field, expr_fn};
+use syntax::ast::{expr_binary, expr_break, expr_cast, expr_field};
 use syntax::ast::{expr_fn_block, expr_index, expr_method_call, expr_path};
 use syntax::ast::{def_prim_ty, def_region, def_self, def_ty, def_ty_param};
 use syntax::ast::{def_upvar, def_use, def_variant, div, eq};
 use syntax::ast::{enum_variant_kind, expr, expr_again, expr_assign_op};
-use syntax::ast::{expr_fn_block, expr_index, expr_loop};
+use syntax::ast::{expr_index, expr_loop};
 use syntax::ast::{expr_path, expr_struct, expr_unary, fn_decl};
 use syntax::ast::{foreign_item, foreign_item_const, foreign_item_fn, ge};
 use syntax::ast::{Generics};
@@ -4810,7 +4810,6 @@ pub impl Resolver {
                 visit_expr(expr, (), visitor);
             }
 
-            expr_fn(_, ref fn_decl, ref block, _) |
             expr_fn_block(ref fn_decl, ref block) => {
                 self.resolve_function(FunctionRibKind(expr.id, block.node.id),
                                       Some(@/*bad*/copy *fn_decl),
diff --git a/src/librustc/middle/trans/debuginfo.rs b/src/librustc/middle/trans/debuginfo.rs
index 8a28769756e..d6c691f6667 100644
--- a/src/librustc/middle/trans/debuginfo.rs
+++ b/src/librustc/middle/trans/debuginfo.rs
@@ -869,15 +869,12 @@ pub fn create_function(fcx: fn_ctxt) -> @Metadata<SubProgramMetadata> {
       }
       ast_map::node_expr(expr) => {
         match /*bad*/copy expr.node {
-          ast::expr_fn(_, decl, _, _) => {
-            ((dbg_cx.names)(~"fn"), decl.output, expr.id)
-          }
           ast::expr_fn_block(decl, _) => {
             ((dbg_cx.names)(~"fn"), decl.output, expr.id)
           }
           _ => fcx.ccx.sess.span_bug(expr.span,
                                      ~"create_function: \
-                                       expected an expr_fn or fn_block here")
+                                       expected an expr_fn_block here")
         }
       }
       ast_map::node_dtor(_, _, did, _) => {
diff --git a/src/librustc/middle/trans/expr.rs b/src/librustc/middle/trans/expr.rs
index 7fe2bd605e9..74cebaee2da 100644
--- a/src/librustc/middle/trans/expr.rs
+++ b/src/librustc/middle/trans/expr.rs
@@ -619,7 +619,6 @@ fn trans_rvalue_dps_unadjusted(bcx: block, expr: @ast::expr,
         ast::expr_vec(*) | ast::expr_repeat(*) => {
             return tvec::trans_fixed_vstore(bcx, expr, expr, dest);
         }
-        ast::expr_fn(_, ref decl, ref body, _) |
         ast::expr_fn_block(ref decl, ref body) => {
             let expr_ty = expr_ty(bcx, expr);
             let sigil = ty::ty_closure_sigil(expr_ty);
diff --git a/src/librustc/middle/trans/type_use.rs b/src/librustc/middle/trans/type_use.rs
index ff92f265cc0..7b7a6eee92e 100644
--- a/src/librustc/middle/trans/type_use.rs
+++ b/src/librustc/middle/trans/type_use.rs
@@ -301,7 +301,7 @@ pub fn mark_for_expr(cx: Context, e: @expr) {
             }
         }
       }
-      expr_fn(*) | expr_fn_block(*) => {
+      expr_fn_block(*) => {
           match ty::ty_closure_sigil(ty::expr_ty(cx.ccx.tcx, e)) {
               ast::OwnedSigil => {}
               ast::BorrowedSigil | ast::ManagedSigil => {
diff --git a/src/librustc/middle/ty.rs b/src/librustc/middle/ty.rs
index 7acc1348613..0b0715dd9ca 100644
--- a/src/librustc/middle/ty.rs
+++ b/src/librustc/middle/ty.rs
@@ -3124,7 +3124,6 @@ pub fn expr_kind(tcx: ctxt,
         ast::expr_tup(*) |
         ast::expr_if(*) |
         ast::expr_match(*) |
-        ast::expr_fn(*) |
         ast::expr_fn_block(*) |
         ast::expr_loop_body(*) |
         ast::expr_do_body(*) |
diff --git a/src/librustc/middle/typeck/check/mod.rs b/src/librustc/middle/typeck/check/mod.rs
index a20eee8f981..f724a442902 100644
--- a/src/librustc/middle/typeck/check/mod.rs
+++ b/src/librustc/middle/typeck/check/mod.rs
@@ -2373,10 +2373,6 @@ pub fn check_expr_with_unifier(fcx: @mut FnCtxt,
       ast::expr_match(discrim, ref arms) => {
         bot = _match::check_match(fcx, expr, discrim, (/*bad*/copy *arms));
       }
-      ast::expr_fn(sigil, ref decl, ref body, _) => {
-        check_expr_fn(fcx, expr, Some(sigil),
-                      decl, body, Vanilla, expected);
-      }
       ast::expr_fn_block(ref decl, ref body) => {
         check_expr_fn(fcx, expr, None,
                       decl, body, Vanilla, expected);
diff --git a/src/librustc/middle/typeck/check/regionck.rs b/src/librustc/middle/typeck/check/regionck.rs
index 1f2dfe7192f..8a772665072 100644
--- a/src/librustc/middle/typeck/check/regionck.rs
+++ b/src/librustc/middle/typeck/check/regionck.rs
@@ -282,7 +282,7 @@ pub fn visit_expr(expr: @ast::expr, &&rcx: @mut Rcx, v: rvt) {
             guarantor::for_match(rcx, discr, *arms);
         }
 
-        ast::expr_fn(*) | ast::expr_fn_block(*) => {
+        ast::expr_fn_block(*) => {
             let function_type = rcx.resolve_node_type(expr.id);
             match ty::get(function_type).sty {
                 ty::ty_closure(ty::ClosureTy {sigil: ast::BorrowedSigil,
@@ -708,7 +708,6 @@ pub mod guarantor {
             ast::expr_tup(*) |
             ast::expr_if(*) |
             ast::expr_match(*) |
-            ast::expr_fn(*) |
             ast::expr_fn_block(*) |
             ast::expr_loop_body(*) |
             ast::expr_do_body(*) |
diff --git a/src/libsyntax/ast.rs b/src/libsyntax/ast.rs
index 1053473a3a5..cec35b429b4 100644
--- a/src/libsyntax/ast.rs
+++ b/src/libsyntax/ast.rs
@@ -571,10 +571,6 @@ pub enum expr_ {
        (implicit) condition is always true. */
     expr_loop(blk, Option<ident>),
     expr_match(@expr, ~[arm]),
-
-    // FIXME(#4717) the @() is req'd on windows or else LLVM croaks
-    expr_fn(Sigil, fn_decl, blk, @()),
-
     expr_fn_block(fn_decl, blk),
     // Inner expr is always an expr_fn_block. We need the wrapping node to
     // easily type this (a function returning nil on the inside but bool on
diff --git a/src/libsyntax/ext/env.rs b/src/libsyntax/ext/env.rs
index 91a9de9c051..c8fb83224ac 100644
--- a/src/libsyntax/ext/env.rs
+++ b/src/libsyntax/ext/env.rs
@@ -15,7 +15,7 @@
  * interface.
  */
 
-use prelude::*;
+use core::prelude::*;
 
 use ast;
 use codemap::span;
diff --git a/src/libsyntax/ext/log_syntax.rs b/src/libsyntax/ext/log_syntax.rs
index 368520acd2d..9072f4bdd01 100644
--- a/src/libsyntax/ext/log_syntax.rs
+++ b/src/libsyntax/ext/log_syntax.rs
@@ -8,8 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use prelude::*;
 use core::io::WriterUtil;
+use core::prelude::*;
 
 use ast;
 use codemap;
diff --git a/src/libsyntax/ext/trace_macros.rs b/src/libsyntax/ext/trace_macros.rs
index bb6d656d5cc..d7f7f7c6510 100644
--- a/src/libsyntax/ext/trace_macros.rs
+++ b/src/libsyntax/ext/trace_macros.rs
@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use prelude::*;
+use core::prelude::*;
 
 use ast::tt_delim;
 use ast;
diff --git a/src/libsyntax/fold.rs b/src/libsyntax/fold.rs
index cd962d62e9c..b315e543f5f 100644
--- a/src/libsyntax/fold.rs
+++ b/src/libsyntax/fold.rs
@@ -533,14 +533,6 @@ pub fn noop_fold_expr(e: &expr_, fld: @ast_fold) -> expr_ {
                 arms.map(|x| fld.fold_arm(x))
             )
         }
-        expr_fn(proto, ref decl, ref body, _) => {
-            expr_fn(
-                proto,
-                fold_fn_decl(decl, fld),
-                fld.fold_block(body),
-                @()
-            )
-        }
         expr_fn_block(ref decl, ref body) => {
             expr_fn_block(
                 fold_fn_decl(decl, fld),
diff --git a/src/libsyntax/parse/parser.rs b/src/libsyntax/parse/parser.rs
index 446c4b5f828..a3df97b3ae4 100644
--- a/src/libsyntax/parse/parser.rs
+++ b/src/libsyntax/parse/parser.rs
@@ -23,7 +23,7 @@ use ast::{decl_local, default_blk, deref, div, enum_def, enum_variant_kind};
 use ast::{expl, expr, expr_, expr_addr_of, expr_match, expr_again};
 use ast::{expr_assert, expr_assign, expr_assign_op, expr_binary, expr_block};
 use ast::{expr_break, expr_call, expr_cast, expr_copy, expr_do_body};
-use ast::{expr_field, expr_fn, expr_fn_block, expr_if, expr_index};
+use ast::{expr_field, expr_fn_block, expr_if, expr_index};
 use ast::{expr_lit, expr_log, expr_loop, expr_loop_body, expr_mac};
 use ast::{expr_method_call, expr_paren, expr_path, expr_rec, expr_repeat};
 use ast::{expr_ret, expr_swap, expr_struct, expr_tup, expr_unary};
@@ -381,17 +381,8 @@ pub impl Parser {
         let purity = self.parse_purity();
         let onceness = parse_onceness(&self);
         self.expect_keyword(&~"fn");
-        let post_sigil = self.parse_fn_ty_sigil();
-
-        let sigil = match (pre_sigil, post_sigil) {
-            (None, None) => BorrowedSigil,
-            (Some(p), None) | (None, Some(p)) => p,
-            (Some(_), Some(_)) => {
-                self.fatal(~"cannot combine prefix and postfix \
-                             syntax for closure kind; note that \
-                             postfix syntax is obsolete");
-            }
-        };
+
+        let sigil = match pre_sigil { None => BorrowedSigil, Some(p) => p };
 
         let region = if pre_region_name.is_some() {
             Some(self.region_from_name(pre_region_name))
@@ -1150,15 +1141,6 @@ pub impl Parser {
             return self.parse_loop_expr();
         } else if self.eat_keyword(&~"match") {
             return self.parse_match_expr();
-        } else if self.eat_keyword(&~"fn") {
-            let opt_sigil = self.parse_fn_ty_sigil();
-            let sigil = match opt_sigil {
-                None => {
-                    self.fatal(~"fn expr are deprecated, use fn@")
-                }
-                Some(p) => { p }
-            };
-            return self.parse_fn_expr(sigil);
         } else if self.eat_keyword(&~"unsafe") {
             return self.parse_block_expr(lo, unsafe_blk);
         } else if *self.token == token::LBRACKET {
@@ -1775,19 +1757,6 @@ pub impl Parser {
         self.mk_expr(lo, hi, expr_if(cond, thn, els))
     }
 
-    fn parse_fn_expr(sigil: Sigil) -> @expr {
-        let lo = self.last_span.lo;
-
-        // if we want to allow fn expression argument types to be inferred in
-        // the future, just have to change parse_arg to parse_fn_block_arg.
-        let decl = self.parse_fn_decl(|p| p.parse_arg());
-
-        let body = self.parse_block();
-
-        self.mk_expr(lo, body.span.hi,
-                     expr_fn(sigil, decl, body, @()))
-    }
-
     // `|args| { ... }` like in `do` expressions
     fn parse_lambda_block_expr() -> @expr {
         self.parse_lambda_expr_(
diff --git a/src/libsyntax/print/pprust.rs b/src/libsyntax/print/pprust.rs
index 62907506d46..f808a3be6bb 100644
--- a/src/libsyntax/print/pprust.rs
+++ b/src/libsyntax/print/pprust.rs
@@ -1346,17 +1346,6 @@ pub fn print_expr(s: @ps, &&expr: @ast::expr) {
         }
         bclose_(s, expr.span, match_indent_unit);
       }
-      ast::expr_fn(sigil, ref decl, ref body, _) => {
-        // containing cbox, will be closed by print-block at }
-        cbox(s, indent_unit);
-        // head-box, will be closed by print-block at start
-        ibox(s, 0u);
-        print_fn_header_info(s, None, None, ast::Many,
-                             Some(sigil), ast::inherited);
-        print_fn_args_and_ret(s, decl, None);
-        space(s.s);
-        print_block(s, body);
-      }
       ast::expr_fn_block(ref decl, ref body) => {
         // in do/for blocks we don't want to show an empty
         // argument list, but at this point we don't know which
diff --git a/src/libsyntax/visit.rs b/src/libsyntax/visit.rs
index 5c4bd083f6a..262754624cb 100644
--- a/src/libsyntax/visit.rs
+++ b/src/libsyntax/visit.rs
@@ -534,17 +534,6 @@ pub fn visit_expr<E>(ex: @expr, e: E, v: vt<E>) {
             (v.visit_expr)(x, e, v);
             for arms.each |a| { (v.visit_arm)(a, e, v); }
         }
-        expr_fn(proto, ref decl, ref body, _) => {
-            (v.visit_fn)(
-                &fk_anon(proto),
-                decl,
-                body,
-                ex.span,
-                ex.id,
-                e,
-                v
-            );
-        }
         expr_fn_block(ref decl, ref body) => {
             (v.visit_fn)(
                 &fk_fn_block,