Treat bare vector and string literals as fixed length vecs. Closes #2922.

Author: msullivan

src/rustc/middle/check_const.rs

@@ -38,14 +38,13 @@ fn check_item(sess: session, ast_map: ast_map::map, def_map: resolve::def_map,
 fn check_pat(p: @pat, &&_is_const: bool, v: visit::vt<bool>) {
     fn is_str(e: @expr) -> bool {
         alt e.node {
-          expr_lit(@{node: lit_str(_), _}) |
           expr_vstore(@{node: expr_lit(@{node: lit_str(_), _}), _},
                       vstore_uniq) { true }
           _ { false }
         }
     }
     alt p.node {
-      // Let through plain string literals here
+      // Let through plain ~-string literals here
       pat_lit(a) { if !is_str(a) { v.visit_expr(a, true, v); } }
       pat_range(a, b) {
         if !is_str(a) { v.visit_expr(a, true, v); }

src/rustc/middle/lint.rs

@@ -43,12 +43,10 @@ enum lint {
     unused_imports,
     while_true,
     path_statement,
-    old_vecs,
+    implicit_copies,
     unrecognized_warning,
     non_implicitly_copyable_typarams,
     vecs_not_implicitly_copyable,
-    implicit_copies,
-    old_strs,
 }
 
 // This is pretty unfortunate. We really want some sort of "deriving Enum"
@@ -59,12 +57,10 @@ fn int_to_lint(i: int) -> lint {
       1 { unused_imports }
       2 { while_true }
       3 { path_statement }
-      4 { old_vecs }
+      4 { implicit_copies }
       5 { unrecognized_warning }
       6 { non_implicitly_copyable_typarams }
       7 { vecs_not_implicitly_copyable }
-      8 { implicit_copies }
-      9 { old_strs }
     }
 }
 
@@ -104,16 +100,6 @@ fn get_lint_dict() -> lint_dict {
            desc: ~"path statements with no effect",
            default: warn}),
 
-        (~"old_vecs",
-         @{lint: old_vecs,
-           desc: ~"old (deprecated) vectors",
-           default: error}),
-
-        (~"old_strs",
-         @{lint: old_strs,
-           desc: ~"old (deprecated) strings",
-           default: error}),
-
         (~"unrecognized_warning",
          @{lint: unrecognized_warning,
            desc: ~"unrecognized warning attribute",
@@ -321,7 +307,6 @@ fn check_item(i: @ast::item, cx: ty::ctxt) {
     check_item_ctypes(cx, i);
     check_item_while_true(cx, i);
     check_item_path_statement(cx, i);
-    check_item_old_vecs(cx, i);
 }
 
 // Take a visitor, and modify it so that it will not proceed past subitems.
@@ -422,63 +407,6 @@ fn check_item_path_statement(cx: ty::ctxt, it: @ast::item) {
     visit::visit_item(it, (), visit);
 }
 
-fn check_item_old_vecs(cx: ty::ctxt, it: @ast::item) {
-    let uses_vstore = int_hash();
-
-    let visit = item_stopping_visitor(visit::mk_simple_visitor(@{
-
-        visit_expr:fn@(e: @ast::expr) {
-            alt e.node {
-              ast::expr_vec(_, _)
-              if ! uses_vstore.contains_key(e.id) {
-                cx.sess.span_lint(
-                    old_vecs, e.id, it.id,
-                    e.span, ~"deprecated vec expr");
-              }
-              ast::expr_lit(@{node: ast::lit_str(_), span:_})
-              if ! uses_vstore.contains_key(e.id) {
-                cx.sess.span_lint(
-                    old_strs, e.id, it.id,
-                    e.span, ~"deprecated str expr");
-              }
-
-              ast::expr_vstore(@inner, _) {
-                uses_vstore.insert(inner.id, true);
-              }
-              _ { }
-            }
-        },
-
-        visit_ty: fn@(t: @ast::ty) {
-            alt t.node {
-              ast::ty_vec(_)
-              if ! uses_vstore.contains_key(t.id) {
-                cx.sess.span_lint(
-                    old_vecs, t.id, it.id,
-                    t.span, ~"deprecated vec type");
-              }
-              ast::ty_path(@{span: _, global: _, idents: ids,
-                             rp: none, types: _}, _)
-              if ids == ~[@~"str"] && (! uses_vstore.contains_key(t.id)) {
-                cx.sess.span_lint(
-                    old_strs, t.id, it.id,
-                    t.span, ~"deprecated str type");
-              }
-              ast::ty_fixed_length(inner, _) |
-              ast::ty_box({ty: inner, _}) |
-              ast::ty_uniq({ty: inner, _}) |
-              ast::ty_rptr(_, {ty: inner, _}) {
-                uses_vstore.insert(inner.id, true);
-              }
-              _ { }
-            }
-        }
-
-        with *visit::default_simple_visitor()
-    }));
-    visit::visit_item(it, (), visit);
-}
-
 fn check_crate(tcx: ty::ctxt, crate: @ast::crate) {
 
     let v = visit::mk_simple_visitor(@{

src/rustc/middle/trans/alt.rs

@@ -47,7 +47,6 @@ fn trans_opt(bcx: block, o: opt) -> opt_result {
     alt o {
       lit(l) {
         alt l.node {
-          ast::expr_lit(@{node: ast::lit_str(s), _}) |
           ast::expr_vstore(@{node: ast::expr_lit(
               @{node: ast::lit_str(s), _}), _},
                            ast::vstore_uniq) {

src/rustc/middle/trans/base.rs

@@ -1447,7 +1447,8 @@ fn trans_lit(cx: block, e: @ast::expr, lit: ast::lit, dest: dest) -> block {
     let _icx = cx.insn_ctxt(~"trans_lit");
     if dest == ignore { ret cx; }
     alt lit.node {
-      ast::lit_str(s) { tvec::trans_estr(cx, s, ast::vstore_uniq, dest) }
+      ast::lit_str(s) { tvec::trans_estr(cx, s,
+                                         ast::vstore_fixed(none), dest) }
       _ {
         store_in_dest(cx, trans_crate_lit(cx.ccx(), e, lit), dest)
       }
@@ -3542,7 +3543,8 @@ fn trans_expr(bcx: block, e: @ast::expr, dest: dest) -> block {
           ast::expr_vstore(e, v) { ret tvec::trans_vstore(bcx, e, v, dest); }
           ast::expr_lit(lit) { ret trans_lit(bcx, e, *lit, dest); }
           ast::expr_vec(args, _) {
-            ret tvec::trans_evec(bcx, args, ast::vstore_uniq, e.id, dest);
+            ret tvec::trans_evec(bcx, args, ast::vstore_fixed(none),
+                                 e.id, dest);
           }
           ast::expr_binary(op, lhs, rhs) {
             ret trans_binary(bcx, op, lhs, rhs, dest, e);

src/rustc/middle/typeck/check.rs

@@ -611,7 +611,7 @@ fn check_lit(fcx: @fn_ctxt, lit: @ast::lit) -> ty::t {
     let tcx = fcx.ccx.tcx;
 
     alt lit.node {
-      ast::lit_str(_) { ty::mk_estr(tcx, ty::vstore_uniq) }
+      ast::lit_str(s) { ty::mk_estr(tcx, ty::vstore_fixed(s.len())) }
       ast::lit_int(_, t) { ty::mk_mach_int(tcx, t) }
       ast::lit_uint(_, t) { ty::mk_mach_uint(tcx, t) }
       ast::lit_int_unsuffixed(_) {
@@ -1524,7 +1524,7 @@ fn check_expr_with_unifier(fcx: @fn_ctxt,
         let t: ty::t = fcx.infcx.next_ty_var();
         for args.each |e| { bot |= check_expr_with(fcx, e, t); }
         let typ = ty::mk_evec(tcx, {ty: t, mutbl: mutbl},
-                              ty::vstore_uniq);
+                              ty::vstore_fixed(args.len()));
         fcx.write_ty(id, typ);
       }
       ast::expr_tup(elts) {

src/test/compile-fail/alt-range-fail.rs

@@ -9,11 +9,11 @@ fn main() {
     };
 
     alt "wow" {
-      "wow" to "woow" { }
+      "bar" to "foo" { }
     };
 
     alt 5u {
       'c' to 100u { }
       _ { }
     };
-}
+}

src/test/compile-fail/binop-bitxor-str.rs

@@ -1,3 +1,3 @@
 // error-pattern:^ cannot be applied to type `~str`
 
-fn main() { let x = "a" ^ "b"; }
+fn main() { let x = ~"a" ^ ~"b"; }

src/test/compile-fail/issue-2063.rs

@@ -7,7 +7,7 @@ enum t = @t; //~ ERROR this type cannot be instantiated
 // the compiler to attempt autoderef and then
 // try to resolve the method.
 impl methods for t {
-    fn to_str() -> ~str { "t" }
+    fn to_str() -> ~str { ~"t" }
 }
 
 fn new_t(x: t) {

src/test/compile-fail/minus-string.rs

@@ -1,3 +1,3 @@
 // error-pattern:cannot apply unary operator `-` to type `~str`
 
-fn main() { -"foo"; }
+fn main() { -~"foo"; }

src/test/compile-fail/missing-do.rs

@@ -3,7 +3,7 @@
 fn foo(f: fn()) { f() }
 
 fn main() {
-    "" || 42; //~ ERROR binary operation || cannot be applied to type `~str`
+    ~"" || 42; //~ ERROR binary operation || cannot be applied to type `~str`
     foo || {}; //~ ERROR binary operation || cannot be applied to type `extern fn(fn())`
     //~^ NOTE did you forget the 'do' keyword for the call?
 }