syntax: remove obsolete mutability from ExprVec and ExprRepeat.

diff --git a/src/librustc/front/test.rs b/src/librustc/front/test.rs
index 82e2e3147c93db1b0b39b18f39def54c789028d3..86d2e039505f186f1a3e51435773e69e887fb07d 100644 (file)
--- a/src/librustc/front/test.rs
+++ b/src/librustc/front/test.rs
@@ -404,21 +404,17 @@ fn is_test_crate(krate: &ast::Crate) -> bool {
 }
 
 fn mk_test_descs(cx: &TestCtxt) -> @ast::Expr {
-    let mut descs = Vec::new();
     debug!("building test vector from {} tests", cx.testfns.borrow().len());
-    for test in cx.testfns.borrow().iter() {
-        descs.push(mk_test_desc_and_fn_rec(cx, test));
-    }
-
-    let inner_expr = @ast::Expr {
-        id: ast::DUMMY_NODE_ID,
-        node: ast::ExprVec(descs, ast::MutImmutable),
-        span: DUMMY_SP,
-    };
 
     @ast::Expr {
         id: ast::DUMMY_NODE_ID,
-        node: ast::ExprVstore(inner_expr, ast::ExprVstoreSlice),
+        node: ast::ExprVstore(@ast::Expr {
+            id: ast::DUMMY_NODE_ID,
+            node: ast::ExprVec(cx.testfns.borrow().iter().map(|test| {
+                mk_test_desc_and_fn_rec(cx, test)
+            }).collect()),
+            span: DUMMY_SP,
+        }, ast::ExprVstoreSlice),
         span: DUMMY_SP,
     }
 }

diff --git a/src/librustc/middle/cfg/construct.rs b/src/librustc/middle/cfg/construct.rs
index a66e9191b33338b805a78a43d729d5c2ffddf332..d631340fc4e31c974c1ed4bc287b2b5ed3157a7e 100644 (file)
--- a/src/librustc/middle/cfg/construct.rs
+++ b/src/librustc/middle/cfg/construct.rs
@@ -347,7 +347,7 @@ fn expr(&mut self, expr: @ast::Expr, pred: CFGIndex) -> CFGIndex {
                 self.add_node(expr.id, [])
             }
 
-            ast::ExprVec(ref elems, _) => {
+            ast::ExprVec(ref elems) => {
                 self.straightline(expr, pred, elems.as_slice())
             }
 
@@ -379,7 +379,7 @@ fn expr(&mut self, expr: @ast::Expr, pred: CFGIndex) -> CFGIndex {
                 self.straightline(expr, base_exit, field_exprs.as_slice())
             }
 
-            ast::ExprRepeat(elem, count, _) => {
+            ast::ExprRepeat(elem, count) => {
                 self.straightline(expr, pred, [elem, count])
             }
 

diff --git a/src/librustc/middle/check_const.rs b/src/librustc/middle/check_const.rs
index 6d95202d2c14b878a8f17887718fe3ed367114bf..e3a0a6a9782290bb52979d75afcbfcfb21190b4f 100644 (file)
--- a/src/librustc/middle/check_const.rs
+++ b/src/librustc/middle/check_const.rs
@@ -157,7 +157,7 @@ fn check_expr(v: &mut CheckCrateVisitor, e: &Expr, is_const: bool) {
           }
           ExprVstore(_, ExprVstoreMutSlice) |
           ExprVstore(_, ExprVstoreSlice) |
-          ExprVec(_, MutImmutable) |
+          ExprVec(_) |
           ExprAddrOf(MutImmutable, _) |
           ExprParen(..) |
           ExprField(..) |

diff --git a/src/librustc/middle/const_eval.rs b/src/librustc/middle/const_eval.rs
index bd45956fbb2ac9610ba4a0fc340af12da3324498..aca8367f0b83720665710acb88abcb1f69d8e318 100644 (file)
--- a/src/librustc/middle/const_eval.rs
+++ b/src/librustc/middle/const_eval.rs
@@ -213,7 +213,7 @@ fn classify(&mut self, e: &Expr) -> constness {
                 join(self.classify(a), self.classify(b)),
 
             ast::ExprTup(ref es) |
-            ast::ExprVec(ref es, ast::MutImmutable) =>
+            ast::ExprVec(ref es) =>
                 join_all(es.iter().map(|e| self.classify(*e))),
 
             ast::ExprVstore(e, vstore) => {

diff --git a/src/librustc/middle/dataflow.rs b/src/librustc/middle/dataflow.rs
index 92d359887b98f00aa6c48789e280580d1688cb38..2ef1adba771dc17669ff530888524b0546c39910 100644 (file)
--- a/src/librustc/middle/dataflow.rs
+++ b/src/librustc/middle/dataflow.rs
@@ -538,11 +538,11 @@ fn walk_expr(&mut self,
                 self.walk_expr(l, in_out, loop_scopes);
             }
 
-            ast::ExprVec(ref exprs, _) => {
+            ast::ExprVec(ref exprs) => {
                 self.walk_exprs(exprs.as_slice(), in_out, loop_scopes)
             }
 
-            ast::ExprRepeat(l, r, _) => {
+            ast::ExprRepeat(l, r) => {
                 self.walk_expr(l, in_out, loop_scopes);
                 self.walk_expr(r, in_out, loop_scopes);
             }

diff --git a/src/librustc/middle/kind.rs b/src/librustc/middle/kind.rs
index a667e81f349fe63fb9804e88825cfca06d2c1c22..09f396e932ff2a1d1cd67212bb1bd36f6658d195 100644 (file)
--- a/src/librustc/middle/kind.rs
+++ b/src/librustc/middle/kind.rs
@@ -309,7 +309,7 @@ pub fn check_expr(cx: &mut Context, e: &Expr) {
             let target_ty = ty::expr_ty(cx.tcx, e);
             check_trait_cast(cx, source_ty, target_ty, source.span);
         }
-        ExprRepeat(element, count_expr, _) => {
+        ExprRepeat(element, count_expr) => {
             let count = ty::eval_repeat_count(cx.tcx, count_expr);
             if count > 1 {
                 let element_ty = ty::expr_ty(cx.tcx, element);

diff --git a/src/librustc/middle/liveness.rs b/src/librustc/middle/liveness.rs
index 42b7260a4ae275dce66d413adf86da76f4b8c128..046103c439db993277a6922c7155a431697d35a1 100644 (file)
--- a/src/librustc/middle/liveness.rs
+++ b/src/librustc/middle/liveness.rs
@@ -1109,11 +1109,11 @@ fn propagate_through_expr(&mut self, expr: &Expr, succ: LiveNode)
             self.propagate_through_expr(expr, succ)
           }
 
-          ExprVec(ref exprs, _) => {
+          ExprVec(ref exprs) => {
             self.propagate_through_exprs(exprs.as_slice(), succ)
           }
 
-          ExprRepeat(element, count, _) => {
+          ExprRepeat(element, count) => {
             let succ = self.propagate_through_expr(count, succ);
             self.propagate_through_expr(element, succ)
           }

diff --git a/src/librustc/middle/moves.rs b/src/librustc/middle/moves.rs
index f3ecfdefa75cea8b248a66540c89fac7641e31a8..dbc28f9fdd5626c1003f59b7eadd01c9ada8abca 100644 (file)
--- a/src/librustc/middle/moves.rs
+++ b/src/librustc/middle/moves.rs
@@ -473,7 +473,7 @@ fn has_dtor(tcx: &ty::ctxt, ty: ty::t) -> bool {
                 self.use_expr(base, expr_mode);
             }
 
-            ExprVec(ref exprs, _) => {
+            ExprVec(ref exprs) => {
                 self.consume_exprs(exprs.as_slice());
             }
 
@@ -539,7 +539,7 @@ fn has_dtor(tcx: &ty::ctxt, ty: ty::t) -> bool {
                 // }
             }
 
-            ExprRepeat(base, count, _) => {
+            ExprRepeat(base, count) => {
                 self.consume_expr(base);
                 self.consume_expr(count);
             }

diff --git a/src/librustc/middle/region.rs b/src/librustc/middle/region.rs
index ad940113a86c498c8c2e74f38549e087d325fdd1..8a5e0d3df1711d9cc3fd756c777aa7dd79b60f76 100644 (file)
--- a/src/librustc/middle/region.rs
+++ b/src/librustc/middle/region.rs
@@ -724,7 +724,7 @@ fn record_rvalue_scope_if_borrow_expr(visitor: &mut RegionResolutionVisitor,
                 visitor.region_maps.record_rvalue_scope(subexpr.id, blk_id);
                 record_rvalue_scope_if_borrow_expr(visitor, subexpr, blk_id);
             }
-            ast::ExprVec(ref subexprs, _) |
+            ast::ExprVec(ref subexprs) |
             ast::ExprTup(ref subexprs) => {
                 for &subexpr in subexprs.iter() {
                     record_rvalue_scope_if_borrow_expr(

diff --git a/src/librustc/middle/trans/consts.rs b/src/librustc/middle/trans/consts.rs
index 6aaae564fdf6d4a1f4f415263d31ad28f6a5d74a..a2b46b1f2a1d091367d060f09b047c7c6c330058 100644 (file)
--- a/src/librustc/middle/trans/consts.rs
+++ b/src/librustc/middle/trans/consts.rs
@@ -557,7 +557,7 @@ fn const_expr_unadjusted(cx: &CrateContext, e: &ast::Expr,
                    inlineable.iter().fold(true, |a, &b| a && b))
               })
           }
-          ast::ExprVec(ref es, ast::MutImmutable) => {
+          ast::ExprVec(ref es) => {
             let (v, _, inlineable) = const_vec(cx,
                                                e,
                                                es.as_slice(),
@@ -573,7 +573,7 @@ fn const_expr_unadjusted(cx: &CrateContext, e: &ast::Expr,
                     _ => { cx.sess().span_bug(e.span, "bad const-slice lit") }
                 }
               }
-              ast::ExprVec(ref es, ast::MutImmutable) => {
+              ast::ExprVec(ref es) => {
                 let (cv, llunitty, _) = const_vec(cx,
                                                   e,
                                                   es.as_slice(),
@@ -592,7 +592,7 @@ fn const_expr_unadjusted(cx: &CrateContext, e: &ast::Expr,
               _ => cx.sess().span_bug(e.span, "bad const-slice expr")
             }
           }
-          ast::ExprRepeat(elem, count, _) => {
+          ast::ExprRepeat(elem, count) => {
             let vec_ty = ty::expr_ty(cx.tcx(), e);
             let unit_ty = ty::sequence_element_type(cx.tcx(), vec_ty);
             let llunitty = type_of::type_of(cx, unit_ty);

diff --git a/src/librustc/middle/trans/debuginfo.rs b/src/librustc/middle/trans/debuginfo.rs
index df4598c03072c704e36c37cab9525f7a7f262a74..0a610538f316fcf4a6b7d5bb02c9700d41fd517b 100644 (file)
--- a/src/librustc/middle/trans/debuginfo.rs
+++ b/src/librustc/middle/trans/debuginfo.rs
@@ -2619,15 +2619,15 @@ fn walk_expr(cx: &CrateContext,
                 walk_expr(cx, rhs, scope_stack, scope_map);
             }
 
-            ast::ExprVec(ref init_expressions, _) |
-            ast::ExprTup(ref init_expressions)    => {
+            ast::ExprVec(ref init_expressions) |
+            ast::ExprTup(ref init_expressions) => {
                 for ie in init_expressions.iter() {
                     walk_expr(cx, *ie, scope_stack, scope_map);
                 }
             }
 
-            ast::ExprAssign(sub_exp1, sub_exp2)    |
-            ast::ExprRepeat(sub_exp1, sub_exp2, _) => {
+            ast::ExprAssign(sub_exp1, sub_exp2) |
+            ast::ExprRepeat(sub_exp1, sub_exp2) => {
                 walk_expr(cx, sub_exp1, scope_stack, scope_map);
                 walk_expr(cx, sub_exp2, scope_stack, scope_map);
             }

diff --git a/src/librustc/middle/trans/tvec.rs b/src/librustc/middle/trans/tvec.rs
index 96368467163cd55a1632b02706d096de846880fb..b47f509aeeec759a99198f37c2025f5705be2ad4 100644 (file)
--- a/src/librustc/middle/trans/tvec.rs
+++ b/src/librustc/middle/trans/tvec.rs
@@ -392,7 +392,7 @@ pub fn write_content<'a>(
                 }
             }
         }
-        ast::ExprVec(ref elements, _) => {
+        ast::ExprVec(ref elements) => {
             match dest {
                 Ignore => {
                     for element in elements.iter() {
@@ -418,7 +418,7 @@ pub fn write_content<'a>(
             }
             return bcx;
         }
-        ast::ExprRepeat(element, count_expr, _) => {
+        ast::ExprRepeat(element, count_expr) => {
             match dest {
                 Ignore => {
                     return expr::trans_into(bcx, element, Ignore);
@@ -486,8 +486,8 @@ pub fn elements_required(bcx: &Block, content_expr: &ast::Expr) -> uint {
                 }
             }
         },
-        ast::ExprVec(ref es, _) => es.len(),
-        ast::ExprRepeat(_, count_expr, _) => {
+        ast::ExprVec(ref es) => es.len(),
+        ast::ExprRepeat(_, count_expr) => {
             ty::eval_repeat_count(bcx.tcx(), count_expr)
         }
         _ => bcx.tcx().sess.span_bug(content_expr.span,

diff --git a/src/librustc/middle/typeck/check/mod.rs b/src/librustc/middle/typeck/check/mod.rs
index 8f9b67f81e884ac63445c63e4f068cb17db72340..a1e878b592ea6efdd41bbebbc2e16f204cfb5704 100644 (file)
--- a/src/librustc/middle/typeck/check/mod.rs
+++ b/src/librustc/middle/typeck/check/mod.rs
@@ -2482,13 +2482,13 @@ fn check_struct_enum_variant(fcx: &FnCtxt,
             let tt = ast_expr_vstore_to_vstore(fcx, ev, vst);
             ty::mk_str(tcx, tt)
           }
-          ast::ExprVec(ref args, mutbl) => {
+          ast::ExprVec(ref args) => {
             let tt = ast_expr_vstore_to_vstore(fcx, ev, vst);
             let mut any_error = false;
             let mut any_bot = false;
             let mutability = match vst {
                 ast::ExprVstoreMutSlice => ast::MutMutable,
-                _ => mutbl,
+                _ => ast::MutImmutable,
             };
             let t: ty::t = fcx.infcx().next_ty_var();
             for e in args.iter() {
@@ -2509,13 +2509,13 @@ fn check_struct_enum_variant(fcx: &FnCtxt,
                 ty::mk_vec(tcx, ty::mt {ty: t, mutbl: mutability}, tt)
             }
           }
-          ast::ExprRepeat(element, count_expr, mutbl) => {
+          ast::ExprRepeat(element, count_expr) => {
             check_expr_with_hint(fcx, count_expr, ty::mk_uint());
             let _ = ty::eval_repeat_count(fcx, count_expr);
             let tt = ast_expr_vstore_to_vstore(fcx, ev, vst);
             let mutability = match vst {
                 ast::ExprVstoreMutSlice => ast::MutMutable,
-                _ => mutbl,
+                _ => ast::MutImmutable,
             };
             let t: ty::t = fcx.infcx().next_ty_var();
             check_expr_has_type(fcx, element, t);
@@ -3017,16 +3017,16 @@ fn types_compatible(fcx: &FnCtxt, sp: Span,
             fcx.write_ty(id, t_1);
         }
       }
-      ast::ExprVec(ref args, mutbl) => {
+      ast::ExprVec(ref args) => {
         let t: ty::t = fcx.infcx().next_ty_var();
         for e in args.iter() {
             check_expr_has_type(fcx, *e, t);
         }
-        let typ = ty::mk_vec(tcx, ty::mt {ty: t, mutbl: mutbl},
+        let typ = ty::mk_vec(tcx, ty::mt {ty: t, mutbl: ast::MutImmutable},
                              ty::vstore_fixed(args.len()));
         fcx.write_ty(id, typ);
       }
-      ast::ExprRepeat(element, count_expr, mutbl) => {
+      ast::ExprRepeat(element, count_expr) => {
         check_expr_with_hint(fcx, count_expr, ty::mk_uint());
         let count = ty::eval_repeat_count(fcx, count_expr);
         let t: ty::t = fcx.infcx().next_ty_var();
@@ -3039,7 +3039,7 @@ fn types_compatible(fcx: &FnCtxt, sp: Span,
             fcx.write_bot(id);
         }
         else {
-            let t = ty::mk_vec(tcx, ty::mt {ty: t, mutbl: mutbl},
+            let t = ty::mk_vec(tcx, ty::mt {ty: t, mutbl: ast::MutImmutable},
                                ty::vstore_fixed(count));
             fcx.write_ty(id, t);
         }
@@ -3864,7 +3864,7 @@ pub fn ast_expr_vstore_to_vstore(fcx: &FnCtxt,
                     // string literals and *empty slices* live in static memory
                     ty::vstore_slice(ty::ReStatic)
                 }
-                ast::ExprVec(ref elements, _) if elements.len() == 0 => {
+                ast::ExprVec(ref elements) if elements.len() == 0 => {
                     // string literals and *empty slices* live in static memory
                     ty::vstore_slice(ty::ReStatic)
                 }

diff --git a/src/libsyntax/ast.rs b/src/libsyntax/ast.rs
index 53d2ac97b49fb746363e54cd1b523c8eb05b9c08..6a5acff3fe04e42d293b2ca954d8fdc0708be276 100644 (file)
--- a/src/libsyntax/ast.rs
+++ b/src/libsyntax/ast.rs
@@ -493,7 +493,7 @@ pub enum Expr_ {
     ExprVstore(@Expr, ExprVstore),
     // First expr is the place; second expr is the value.
     ExprBox(@Expr, @Expr),
-    ExprVec(Vec<@Expr>, Mutability),
+    ExprVec(Vec<@Expr>),
     ExprCall(@Expr, Vec<@Expr>),
     ExprMethodCall(Ident, Vec<P<Ty>>, Vec<@Expr>),
     ExprTup(Vec<@Expr>),
@@ -536,7 +536,7 @@ pub enum Expr_ {
     ExprStruct(Path, Vec<Field> , Option<@Expr> /* base */),
 
     // A vector literal constructed from one repeated element.
-    ExprRepeat(@Expr /* element */, @Expr /* count */, Mutability),
+    ExprRepeat(@Expr /* element */, @Expr /* count */),
 
     // No-op: used solely so we can pretty-print faithfully
     ExprParen(@Expr)

diff --git a/src/libsyntax/ext/build.rs b/src/libsyntax/ext/build.rs
index ef62f0a01f6c1fdb12a8bcdfdf553cd7c34157d1..b7c12cd4fdcae29cfb31889b8df0edb5a5717c54 100644 (file)
--- a/src/libsyntax/ext/build.rs
+++ b/src/libsyntax/ext/build.rs
@@ -579,7 +579,7 @@ fn expr_vstore(&self, sp: Span, expr: @ast::Expr, vst: ast::ExprVstore) -> @ast:
         self.expr(sp, ast::ExprVstore(expr, vst))
     }
     fn expr_vec(&self, sp: Span, exprs: Vec<@ast::Expr> ) -> @ast::Expr {
-        self.expr(sp, ast::ExprVec(exprs, ast::MutImmutable))
+        self.expr(sp, ast::ExprVec(exprs))
     }
     fn expr_vec_ng(&self, sp: Span) -> @ast::Expr {
         self.expr_call_global(sp,

diff --git a/src/libsyntax/fold.rs b/src/libsyntax/fold.rs
index 06bf892771dc6b6e6971c367e3d2cf9b5075f4d8..e21f14e4a9622af3698e370281e2c08295be21ca 100644 (file)
--- a/src/libsyntax/fold.rs
+++ b/src/libsyntax/fold.rs
@@ -740,11 +740,11 @@ pub fn noop_fold_expr<T: Folder>(e: @Expr, folder: &mut T) -> @Expr {
         ExprBox(p, e) => {
             ExprBox(folder.fold_expr(p), folder.fold_expr(e))
         }
-        ExprVec(ref exprs, mutt) => {
-            ExprVec(exprs.iter().map(|&x| folder.fold_expr(x)).collect(), mutt)
+        ExprVec(ref exprs) => {
+            ExprVec(exprs.iter().map(|&x| folder.fold_expr(x)).collect())
         }
-        ExprRepeat(expr, count, mutt) => {
-            ExprRepeat(folder.fold_expr(expr), folder.fold_expr(count), mutt)
+        ExprRepeat(expr, count) => {
+            ExprRepeat(folder.fold_expr(expr), folder.fold_expr(count))
         }
         ExprTup(ref elts) => ExprTup(elts.iter().map(|x| folder.fold_expr(*x)).collect()),
         ExprCall(f, ref args) => {

diff --git a/src/libsyntax/parse/parser.rs b/src/libsyntax/parse/parser.rs
index 2d78bfe5694c1130233afad698feef2c68d7f937..94f5458ba535e6fc63b7406ea1bfcf7cb46ed123 100644 (file)
--- a/src/libsyntax/parse/parser.rs
+++ b/src/libsyntax/parse/parser.rs
@@ -1819,12 +1819,11 @@ pub fn parse_bottom_expr(&mut self) -> @Expr {
             return self.parse_block_expr(lo, UnsafeBlock(ast::UserProvided));
         } else if self.token == token::LBRACKET {
             self.bump();
-            let mutbl = MutImmutable;
 
             if self.token == token::RBRACKET {
                 // Empty vector.
                 self.bump();
-                ex = ExprVec(Vec::new(), mutbl);
+                ex = ExprVec(Vec::new());
             } else {
                 // Nonempty vector.
                 let first_expr = self.parse_expr();
@@ -1835,7 +1834,7 @@ pub fn parse_bottom_expr(&mut self) -> @Expr {
                     self.bump();
                     let count = self.parse_expr();
                     self.expect(&token::RBRACKET);
-                    ex = ExprRepeat(first_expr, count, mutbl);
+                    ex = ExprRepeat(first_expr, count);
                 } else if self.token == token::COMMA {
                     // Vector with two or more elements.
                     self.bump();
@@ -1846,11 +1845,11 @@ pub fn parse_bottom_expr(&mut self) -> @Expr {
                     );
                     let mut exprs = vec!(first_expr);
                     exprs.push_all_move(remaining_exprs);
-                    ex = ExprVec(exprs, mutbl);
+                    ex = ExprVec(exprs);
                 } else {
                     // Vector with one element.
                     self.expect(&token::RBRACKET);
-                    ex = ExprVec(vec!(first_expr), mutbl);
+                    ex = ExprVec(vec!(first_expr));
                 }
             }
             hi = self.last_span.hi;

diff --git a/src/libsyntax/print/pprust.rs b/src/libsyntax/print/pprust.rs
index 1eee0fb87d6bf15a7edab52d6369ee6edd35ee9d..7972852a3f458a63e72a166b6755c8401d3fc232 100644 (file)
--- a/src/libsyntax/print/pprust.rs
+++ b/src/libsyntax/print/pprust.rs
@@ -1110,25 +1110,17 @@ pub fn print_expr(&mut self, expr: &ast::Expr) -> IoResult<()> {
                 try!(self.word_space(")"));
                 try!(self.print_expr(e));
             }
-            ast::ExprVec(ref exprs, mutbl) => {
+            ast::ExprVec(ref exprs) => {
                 try!(self.ibox(indent_unit));
                 try!(word(&mut self.s, "["));
-                if mutbl == ast::MutMutable {
-                    try!(word(&mut self.s, "mut"));
-                    if exprs.len() > 0u { try!(self.nbsp()); }
-                }
                 try!(self.commasep_exprs(Inconsistent, exprs.as_slice()));
                 try!(word(&mut self.s, "]"));
                 try!(self.end());
             }
 
-            ast::ExprRepeat(element, count, mutbl) => {
+            ast::ExprRepeat(element, count) => {
                 try!(self.ibox(indent_unit));
                 try!(word(&mut self.s, "["));
-                if mutbl == ast::MutMutable {
-                    try!(word(&mut self.s, "mut"));
-                    try!(self.nbsp());
-                }
                 try!(self.print_expr(element));
                 try!(word(&mut self.s, ","));
                 try!(word(&mut self.s, ".."));

diff --git a/src/libsyntax/visit.rs b/src/libsyntax/visit.rs
index eb03bb1f0bbe046db848bc624599fb47fbc98f23..81e5e2280275f0f946b9636b602bf2cde4c2ad0c 100644 (file)
--- a/src/libsyntax/visit.rs
+++ b/src/libsyntax/visit.rs
@@ -635,10 +635,10 @@ pub fn walk_expr<E: Clone, V: Visitor<E>>(visitor: &mut V, expression: &Expr, en
             visitor.visit_expr(place, env.clone());
             visitor.visit_expr(subexpression, env.clone())
         }
-        ExprVec(ref subexpressions, _) => {
+        ExprVec(ref subexpressions) => {
             walk_exprs(visitor, subexpressions.as_slice(), env.clone())
         }
-        ExprRepeat(element, count, _) => {
+        ExprRepeat(element, count) => {
             visitor.visit_expr(element, env.clone());
             visitor.visit_expr(count, env.clone())
         }