libsyntax: Stop parsing mutable fields

src/librustc/middle/const_eval.rs

@@ -118,11 +118,7 @@ pub fn classify(e: @expr,
 
               ast::expr_struct(_, ref fs, None) => {
                 let cs = do vec::map((*fs)) |f| {
-                    if f.node.mutbl == ast::m_imm {
-                        classify(f.node.expr, tcx)
-                    } else {
-                        non_const
-                    }
+                    classify(f.node.expr, tcx)
                 };
                 join_all(cs)
               }

src/libsyntax/ast.rs

@@ -425,7 +425,6 @@ pub struct arm {
 
 #[deriving(Eq, Encodable, Decodable)]
 pub struct field_ {
-    mutbl: mutability,
     ident: ident,
     expr: @expr,
 }

src/libsyntax/ext/build.rs

@@ -486,7 +486,7 @@ impl AstBuilder for @ExtCtxt {
         self.expr(b.span, ast::expr_block(b))
     }
     fn field_imm(&self, span: span, name: ident, e: @ast::expr) -> ast::field {
-        respan(span, ast::field_ { mutbl: ast::m_imm, ident: name, expr: e })
+        respan(span, ast::field_ { ident: name, expr: e })
     }
     fn expr_struct(&self, span: span, path: @ast::Path, fields: ~[ast::field]) -> @ast::expr {
         self.expr(span, ast::expr_struct(path, fields, None))

src/libsyntax/fold.rs

@@ -433,7 +433,6 @@ pub fn noop_fold_expr(e: &expr_, fld: @ast_fold) -> expr_ {
     fn fold_field_(field: field, fld: @ast_fold) -> field {
         spanned {
             node: ast::field_ {
-                mutbl: field.node.mutbl,
                 ident: fld.fold_ident(field.node.ident),
                 expr: fld.fold_expr(field.node.expr),
             },

src/libsyntax/parse/parser.rs

@@ -1157,11 +1157,13 @@ pub impl Parser {
     // parse ident COLON expr
     fn parse_field(&self) -> field {
         let lo = self.span.lo;
-        let m = self.parse_mutability();
         let i = self.parse_ident();
         self.expect(&token::COLON);
         let e = self.parse_expr();
-        spanned(lo, e.span.hi, ast::field_ { mutbl: m, ident: i, expr: e })
+        spanned(lo, e.span.hi, ast::field_ {
+            ident: i,
+            expr: e
+        })
     }
 
     fn mk_expr(&self, lo: BytePos, hi: BytePos, node: expr_) -> @expr {
@@ -2566,10 +2568,6 @@ pub impl Parser {
                          pr: visibility,
                          attrs: ~[attribute]) -> @struct_field {
         let lo = self.span.lo;
-        if self.eat_keyword(keywords::Mut) {
-            // Do nothing, for backwards compatibility.
-            // XXX: Remove after snapshot.
-        }
         if !is_plain_ident(&*self.token) {
             self.fatal("expected ident");
         }

src/libsyntax/print/pprust.rs

@@ -1083,7 +1083,6 @@ pub fn print_call_post(s: @ps,
 pub fn print_expr(s: @ps, expr: @ast::expr) {
     fn print_field(s: @ps, field: ast::field) {
         ibox(s, indent_unit);
-        if field.node.mutbl == ast::m_mutbl { word_nbsp(s, "mut"); }
         print_ident(s, field.node.ident);
         word_space(s, ":");
         print_expr(s, field.node.expr);