replace more vector + (issue #2719)

src/libcore/vec.rs

@@ -5,6 +5,7 @@
 import libc::size_t;
 
 export append;
+export append_one;
 export init_op;
 export is_empty;
 export is_not_empty;
@@ -492,6 +493,13 @@ fn push_all_move<T>(&v: [const T]/~, -rhs: [const T]/~) {
     ret v;
 }
 
+#[inline(always)]
+pure fn append_one<T>(+lhs: [T]/~, +x: T) -> [T]/~ {
+    let mut v <- lhs;
+    unchecked { push(v, x); }
+    v
+}
+
 #[inline(always)]
 pure fn append_mut<T: copy>(lhs: [mut T]/&, rhs: [const T]/&) -> [mut T]/~ {
     let mut v = [mut]/~;

src/libsyntax/ast_map.rs

@@ -57,7 +57,7 @@ enum ast_node {
 type vt = visit::vt<ctx>;
 
 fn extend(cx: ctx, +elt: ident) -> @path {
-    @(cx.path + [path_name(elt)]/~)
+    @(vec::append(cx.path, [path_name(elt)]/~))
 }
 
 fn mk_ast_map_visitor() -> vt {

src/libsyntax/ext/auto_serialize.rs

@@ -740,14 +740,15 @@ fn mk_deser_fn(cx: ext_ctxt, span: span,
             []/~))]/~;
 
     let deser_tps: [ast::ty_param]/~ =
-        [{ident: @"__D",
-          id: cx.next_id(),
-          bounds: deser_bnds}]/~ + vec::map(tps) {|tp|
-        let cloned = cx.clone_ty_param(tp);
-        {bounds: @(vec::append(*cloned.bounds,
-                               [ast::bound_copy]/~))
-         with cloned}
-    };
+        vec::append([{ident: @"__D",
+                      id: cx.next_id(),
+                      bounds: deser_bnds}]/~,
+                    vec::map(tps) {|tp|
+                        let cloned = cx.clone_ty_param(tp);
+                        {bounds: @(vec::append(*cloned.bounds,
+                                               [ast::bound_copy]/~))
+                         with cloned}
+                    });
 
     let deser_blk = cx.expr_blk(f(cx, tps_map, #ast(expr){__d}));
 

src/rustc/middle/trans/alt.rs

@@ -108,12 +108,16 @@ fn expand_nested_bindings(m: match, col: uint, val: ValueRef) -> match {
     for vec::each(m) {|br|
       alt br.pats[col].node {
           ast::pat_ident(name, some(inner)) {
-            let pats = vec::slice(br.pats, 0u, col) + [inner]/~ +
-                vec::slice(br.pats, col + 1u, br.pats.len());
-            vec::push(result, @{pats: pats,
-                        bound: br.bound + [{ident: path_to_ident(name),
-                                val: val}]/~
-                         with *br});
+            let pats = vec::append(
+                vec::slice(br.pats, 0u, col),
+                vec::append([inner]/~,
+                            vec::view(br.pats, col + 1u, br.pats.len())));
+            vec::push(result,
+                      @{pats: pats,
+                        bound: vec::append(
+                            br.bound, [{ident: path_to_ident(name),
+                                        val: val}]/~)
+                                with *br});
           }
           _ { vec::push(result, br); }
         }
@@ -129,12 +133,14 @@ fn enter_match(dm: def_map, m: match, col: uint, val: ValueRef,
     for vec::each(m) {|br|
         alt e(br.pats[col]) {
           some(sub) {
-            let pats = sub + vec::slice(br.pats, 0u, col) +
-                vec::slice(br.pats, col + 1u, br.pats.len());
+            let pats = vec::append(
+                vec::append(sub, vec::view(br.pats, 0u, col)),
+                vec::view(br.pats, col + 1u, br.pats.len()));
             let self = br.pats[col];
             let bound = alt self.node {
               ast::pat_ident(name, none) if !pat_is_variant(dm, self) {
-                br.bound + [{ident: path_to_ident(name), val: val}]/~
+                vec::append(br.bound,
+                            [{ident: path_to_ident(name), val: val}]/~)
               }
               _ { br.bound }
             };
@@ -417,8 +423,8 @@ fn compile_submatch(bcx: block, m: match, vals: [ValueRef]/~,
                 expand_nested_bindings(m, col, val)
             } else { m };
 
-    let vals_left = vec::slice(vals, 0u, col) +
-        vec::slice(vals, col + 1u, vals.len());
+    let vals_left = vec::append(vec::slice(vals, 0u, col),
+                                vec::view(vals, col + 1u, vals.len()));
     let ccx = bcx.fcx.ccx;
     let mut pat_id = 0;
     for vec::each(m) {|br|
@@ -439,7 +445,7 @@ fn compile_submatch(bcx: block, m: match, vals: [ValueRef]/~,
             vec::push(rec_vals, GEPi(bcx, val, [0u, ix]/~));
         }
         compile_submatch(bcx, enter_rec(dm, m, col, rec_fields, val),
-                         rec_vals + vals_left, chk, exits);
+                         vec::append(rec_vals, vals_left), chk, exits);
         ret;
     }
 
@@ -455,7 +461,7 @@ fn compile_submatch(bcx: block, m: match, vals: [ValueRef]/~,
             i += 1u;
         }
         compile_submatch(bcx, enter_tup(dm, m, col, val, n_tup_elts),
-                         tup_vals + vals_left, chk, exits);
+                         vec::append(tup_vals, vals_left), chk, exits);
         ret;
     }
 
@@ -465,8 +471,8 @@ fn compile_submatch(bcx: block, m: match, vals: [ValueRef]/~,
         let box_no_addrspace = non_gc_box_cast(bcx, llbox);
         let unboxed =
             GEPi(bcx, box_no_addrspace, [0u, abi::box_field_body]/~);
-        compile_submatch(bcx, enter_box(dm, m, col, val), [unboxed]/~
-                         + vals_left, chk, exits);
+        compile_submatch(bcx, enter_box(dm, m, col, val),
+                         vec::append([unboxed]/~, vals_left), chk, exits);
         ret;
     }
 
@@ -476,7 +482,7 @@ fn compile_submatch(bcx: block, m: match, vals: [ValueRef]/~,
         let unboxed =
             GEPi(bcx, box_no_addrspace, [0u, abi::box_field_body]/~);
         compile_submatch(bcx, enter_uniq(dm, m, col, val),
-                         [unboxed]/~ + vals_left, chk, exits);
+                         vec::append([unboxed]/~, vals_left), chk, exits);
         ret;
     }
 
@@ -580,7 +586,7 @@ enum branch_kind { no_branch, single, switch, compare, }
           lit(_) | range(_, _) { }
         }
         compile_submatch(opt_cx, enter_opt(tcx, m, opt, col, size, val),
-                         unpacked + vals_left, chk, exits);
+                         vec::append(unpacked, vals_left), chk, exits);
     }
 
     // Compile the fall-through case, if any

src/rustc/middle/trans/base.rs

@@ -2203,7 +2203,7 @@ fn monomorphic_fn(ccx: @crate_ctxt, fn_id: ast::def_id,
     }
     ccx.monomorphizing.insert(fn_id, depth + 1u);
 
-    let pt = *pt + [path_name(@ccx.names(*name))]/~;
+    let pt = vec::append(*pt, [path_name(@ccx.names(*name))]/~);
     let s = mangle_exported_name(ccx, pt, mono_ty);
 
     let mk_lldecl = {||
@@ -2346,8 +2346,9 @@ fn maybe_instantiate_inline(ccx: @crate_ctxt, fn_id: ast::def_id)
                 ty::lookup_item_type(ccx.tcx, impl_did);
             if (*impl_bnds).len() + mth.tps.len() == 0u {
                 let llfn = get_item_val(ccx, mth.id);
-                let path = ty::item_path(ccx.tcx, impl_did) +
-                    [path_name(mth.ident)]/~;
+                let path = vec::append(
+                    ty::item_path(ccx.tcx, impl_did),
+                    [path_name(mth.ident)]/~);
                 trans_fn(ccx, path, mth.decl, mth.body,
                          llfn, impl_self(impl_ty), none, mth.id);
             }
@@ -3113,7 +3114,7 @@ fn trans_args(cx: block, llenv: ValueRef, args: call_args, fn_ty: ty::t,
         }
       }
       arg_vals(vs) {
-        llargs += vs;
+        vec::push_all(llargs, vs);
       }
     }
 
@@ -3867,10 +3868,11 @@ fn trans_log(log_ex: @ast::expr, lvl: @ast::expr,
        ret trans_expr(bcx, lvl, ignore);
     }
 
-    let modpath = [path_mod(ccx.link_meta.name)]/~ +
+    let modpath = vec::append(
+        [path_mod(ccx.link_meta.name)]/~,
         vec::filter(bcx.fcx.path, {|e|
             alt e { path_mod(_) { true } _ { false } }
-        });
+        }));
     let modname = path_str(modpath);
 
     let global = if ccx.module_data.contains_key(modname) {
@@ -4901,12 +4903,16 @@ fn trans_item(ccx: @crate_ctxt, item: ast::item) {
       ast::item_fn(decl, tps, body) {
         if decl.purity == ast::extern_fn  {
             let llfndecl = get_item_val(ccx, item.id);
-            foreign::trans_extern_fn(ccx, *path + [path_name(item.ident)]/~,
+            foreign::trans_extern_fn(ccx,
+                                     vec::append(
+                                         *path,
+                                         [path_name(item.ident)]/~),
                                      decl, body, llfndecl, item.id);
         } else if tps.len() == 0u {
             let llfndecl = get_item_val(ccx, item.id);
-            trans_fn(ccx, *path + [path_name(item.ident)]/~, decl, body,
-                     llfndecl, no_self, none, item.id);
+            trans_fn(ccx,
+                     vec::append(*path, [path_name(item.ident)]/~),
+                     decl, body, llfndecl, no_self, none, item.id);
         } else {
             for vec::each(body.node.stmts) {|stmt|
                 alt stmt.node {
@@ -5112,9 +5118,11 @@ fn fill_fn_pair(bcx: block, pair: ValueRef, llfn: ValueRef,
 }
 
 fn item_path(ccx: @crate_ctxt, i: @ast::item) -> path {
-    *alt check ccx.tcx.items.get(i.id) {
-      ast_map::node_item(_, p) { p }
-    } + [path_name(i.ident)]/~
+    vec::append(
+        *alt check ccx.tcx.items.get(i.id) {
+            ast_map::node_item(_, p) { p }
+        },
+        [path_name(i.ident)]/~)
 }
 
 /* If there's already a symbol for the dtor with <id> and substs <substs>,
@@ -5125,9 +5133,10 @@ fn get_dtor_symbol(ccx: @crate_ctxt, path: path, id: ast::node_id,
   alt ccx.item_symbols.find(id) {
      some(s) { s }
      none if is_none(substs) {
-       let s = mangle_exported_name(ccx,
-                               path + [path_name(@ccx.names("dtor"))]/~,
-                               t);
+       let s = mangle_exported_name(
+           ccx,
+           vec::append(path, [path_name(@ccx.names("dtor"))]/~),
+           t);
        ccx.item_symbols.insert(id, s);
        s
      }
@@ -5137,8 +5146,11 @@ fn get_dtor_symbol(ccx: @crate_ctxt, path: path, id: ast::node_id,
        alt substs {
          some(ss) {
            let mono_ty = ty::subst_tps(ccx.tcx, ss.tys, t);
-           mangle_exported_name(ccx, path +
-                           [path_name(@ccx.names("dtor"))]/~, mono_ty)
+           mangle_exported_name(
+               ccx,
+               vec::append(path,
+                           [path_name(@ccx.names("dtor"))]/~),
+               mono_ty)
          }
          none {
              ccx.sess.bug(#fmt("get_dtor_symbol: not monomorphizing and \
@@ -5157,7 +5169,7 @@ fn get_item_val(ccx: @crate_ctxt, id: ast::node_id) -> ValueRef {
         let mut exprt = false;
         let val = alt check ccx.tcx.items.get(id) {
           ast_map::node_item(i, pth) {
-            let my_path = *pth + [path_name(i.ident)]/~;
+            let my_path = vec::append(*pth, [path_name(i.ident)]/~);
             alt check i.node {
               ast::item_const(_, _) {
                 let typ = ty::node_id_to_type(ccx.tcx, i.id);
@@ -5182,18 +5194,20 @@ fn get_item_val(ccx: @crate_ctxt, id: ast::node_id) -> ValueRef {
           ast_map::node_method(m, impl_id, pth) {
             exprt = true;
             let mty = ty::node_id_to_type(ccx.tcx, id);
-            let pth = *pth + [path_name(@ccx.names("meth")),
-                              path_name(m.ident)]/~;
+            let pth = vec::append(*pth, [path_name(@ccx.names("meth")),
+                                         path_name(m.ident)]/~);
             let llfn = register_fn_full(ccx, m.span, pth, id, mty);
             set_inline_hint_if_appr(m.attrs, llfn);
             llfn
           }
           ast_map::node_foreign_item(ni, _, pth) {
             exprt = true;
-            register_fn(ccx, ni.span, *pth + [path_name(ni.ident)]/~, ni.id)
+            register_fn(ccx, ni.span,
+                        vec::append(*pth, [path_name(ni.ident)]/~),
+                        ni.id)
           }
           ast_map::node_ctor(nm, tps, ctor, _, pt) {
-            let my_path = *pt + [path_name(nm)]/~;
+            let my_path = vec::append(*pt, [path_name(nm)]/~);
             register_fn(ccx, ctor.span, my_path, ctor.node.id)
           }
           ast_map::node_dtor(tps, dt, parent_id, pt) {
@@ -5219,7 +5233,9 @@ fn get_item_val(ccx: @crate_ctxt, id: ast::node_id) -> ValueRef {
 
           ast_map::node_variant(v, enm, pth) {
             assert v.node.args.len() != 0u;
-            let pth = *pth + [path_name(enm.ident), path_name(v.node.name)]/~;
+            let pth = vec::append(*pth,
+                                  [path_name(enm.ident),
+                                   path_name(v.node.name)]/~);
             let llfn = alt check enm.node {
               ast::item_enum(_, _, _) {
                 register_fn(ccx, v.span, pth, id)
@@ -5248,8 +5264,8 @@ fn trans_constant(ccx: @crate_ctxt, it: @ast::item) {
         let mut i = 0;
         let path = item_path(ccx, it);
         for vec::each(variants) {|variant|
-            let p = path + [path_name(variant.node.name),
-                            path_name(@"discrim")]/~;
+            let p = vec::append(path, [path_name(variant.node.name),
+                                       path_name(@"discrim")]/~);
             let s = mangle_exported_name(ccx, p, ty::mk_int(ccx.tcx));
             let disr_val = vi[i].disr_val;
             note_unique_llvm_symbol(ccx, s);
@@ -5454,7 +5470,7 @@ fn impl_map(cx: @crate_ctxt,
         let mut result = []/~;
         for list::each(cx.maps.impl_map.get(id)) {
             |impls|
-            result += (*impls).map({|i| (i.ident, i.did) });
+            vec::push_all(result, (*impls).map({|i| (i.ident, i.did) }));
         }
         ret result;
     }

src/rustc/middle/trans/closure.rs

@@ -329,9 +329,11 @@ fn build_closure(bcx0: block,
           none { bcx.fcx.llretptr }
         };
         let nil_ret = PointerCast(bcx, our_ret, T_ptr(T_nil()));
-        env_vals +=
-            [env_ref(flagptr, ty::mk_mut_ptr(tcx, ty::mk_bool(tcx)), owned),
-             env_ref(nil_ret, ty::mk_nil_ptr(tcx), owned)]/~;
+        vec::push(env_vals,
+                  env_ref(flagptr,
+                          ty::mk_mut_ptr(tcx, ty::mk_bool(tcx)), owned));
+        vec::push(env_vals,
+                  env_ref(nil_ret, ty::mk_nil_ptr(tcx), owned));
     }
     ret store_environment(bcx, env_vals, ck);
 }
@@ -391,7 +393,7 @@ fn trans_expr_fn(bcx: block,
     let ccx = bcx.ccx(), bcx = bcx;
     let fty = node_id_type(bcx, id);
     let llfnty = type_of_fn_from_ty(ccx, fty);
-    let sub_path = bcx.fcx.path + [path_name(@"anon")]/~;
+    let sub_path = vec::append_one(bcx.fcx.path, path_name(@"anon"));
     let s = mangle_internal_name_by_path(ccx, sub_path);
     let llfn = decl_internal_cdecl_fn(ccx.llmod, s, llfnty);
 
@@ -475,7 +477,8 @@ fn trans_bind_1(cx: block, outgoing_fty: ty::t,
 
     // Actually construct the closure
     let {llbox, cdata_ty, bcx} = store_environment(
-        bcx, env_vals + vec::map(bound, {|x| env_expr(x, expr_ty(bcx, x))}),
+        bcx, vec::append(env_vals,
+                         vec::map(bound, {|x| env_expr(x, expr_ty(bcx, x))})),
         ty::ck_box);
 
     // Make thunk

src/rustc/middle/trans/common.rs

@@ -312,8 +312,10 @@ fn revoke_clean(cx: block, val: ValueRef) {
             alt cu { clean_temp(v, _, _) if v == val { true } _ { false } }
         })) {|i|
             info.cleanups =
-                vec::slice(info.cleanups, 0u, i) +
-                vec::slice(info.cleanups, i + 1u, info.cleanups.len());
+                vec::append(vec::slice(info.cleanups, 0u, i),
+                            vec::view(info.cleanups,
+                                      i + 1u,
+                                      info.cleanups.len()));
             scope_clean_changed(info);
         }
     }
@@ -706,7 +708,7 @@ fn T_box_header(cx: @crate_ctxt) -> TypeRef {
 }
 
 fn T_box(cx: @crate_ctxt, t: TypeRef) -> TypeRef {
-    ret T_struct(T_box_header_fields(cx) + [t]/~);
+    ret T_struct(vec::append(T_box_header_fields(cx), [t]/~));
 }
 
 fn T_box_ptr(t: TypeRef) -> TypeRef {
@@ -723,7 +725,7 @@ fn T_opaque_box_ptr(cx: @crate_ctxt) -> TypeRef {
 }
 
 fn T_unique(cx: @crate_ctxt, t: TypeRef) -> TypeRef {
-    ret T_struct(T_box_header_fields(cx) + [t]/~);
+    ret T_struct(vec::append(T_box_header_fields(cx), [t]/~));
 }
 
 fn T_unique_ptr(t: TypeRef) -> TypeRef {

src/rustc/middle/trans/impl.rs

@@ -19,11 +19,13 @@ fn trans_impl(ccx: @crate_ctxt, path: path, name: ast::ident,
               methods: [@ast::method]/~, tps: [ast::ty_param]/~) {
     let _icx = ccx.insn_ctxt("impl::trans_impl");
     if tps.len() > 0u { ret; }
-    let sub_path = path + [path_name(name)]/~;
+    let sub_path = vec::append_one(path, path_name(name));
     for vec::each(methods) {|m|
         if m.tps.len() == 0u {
             let llfn = get_item_val(ccx, m.id);
-            trans_fn(ccx, sub_path + [path_name(m.ident)]/~, m.decl, m.body,
+            trans_fn(ccx,
+                     vec::append_one(sub_path, path_name(m.ident)),
+                     m.decl, m.body,
                      llfn, impl_self(ty::node_id_to_type(ccx.tcx, m.self_id)),
                      none, m.id);
         }
@@ -121,8 +123,10 @@ fn trans_monomorphized_callee(bcx: block, callee_id: ast::node_id,
         let mth_id = method_with_name(bcx.ccx(), impl_did, mname);
         let n_m_tps = method_ty_param_count(ccx, mth_id, impl_did);
         let node_substs = node_id_type_params(bcx, callee_id);
-        let ty_substs = impl_substs +
-            vec::tailn(node_substs, node_substs.len() - n_m_tps);
+        let ty_substs
+            = vec::append(impl_substs,
+                          vec::tailn(node_substs,
+                                     node_substs.len() - n_m_tps));
         let {bcx, val} = trans_self_arg(bcx, base, derefs);
         let lval = lval_static_fn_inner(bcx, mth_id, callee_id, ty_substs,
                                         some(sub_origins));

src/rustc/middle/trans/type_of.rs

@@ -37,7 +37,7 @@ fn type_of_fn(cx: @crate_ctxt, inputs: [ty::arg]/~,
     vec::push(atys, T_opaque_box_ptr(cx));
 
     // ... then explicit args.
-    atys += type_of_explicit_args(cx, inputs);
+    vec::push_all(atys, type_of_explicit_args(cx, inputs));
     ret T_fn(atys, llvm::LLVMVoidType());
 }