Feature gate non-ASCII lifetime identifiers

Fixes #19069.

Author: Jakub Bukaj

src/librustc/lint/builtin.rs

@@ -992,7 +992,7 @@ impl LintPass for NonSnakeCase {
         self.check_snake_case(cx, "trait method", t.ident, t.span);
     }
 
-    fn check_lifetime_decl(&mut self, cx: &Context, t: &ast::LifetimeDef) {
+    fn check_lifetime_def(&mut self, cx: &Context, t: &ast::LifetimeDef) {
         self.check_snake_case(cx, "lifetime", t.lifetime.name.ident(), t.lifetime.span);
     }
 

src/librustc/lint/context.rs

@@ -725,8 +725,8 @@ impl<'a, 'tcx, 'v> Visitor<'v> for Context<'a, 'tcx> {
         run_lints!(self, check_lifetime_ref, lt);
     }
 
-    fn visit_lifetime_decl(&mut self, lt: &ast::LifetimeDef) {
-        run_lints!(self, check_lifetime_decl, lt);
+    fn visit_lifetime_def(&mut self, lt: &ast::LifetimeDef) {
+        run_lints!(self, check_lifetime_def, lt);
     }
 
     fn visit_explicit_self(&mut self, es: &ast::ExplicitSelf) {

src/librustc/lint/mod.rs

@@ -155,7 +155,7 @@ pub trait LintPass {
     fn check_variant_post(&mut self, _: &Context, _: &ast::Variant, _: &ast::Generics) { }
     fn check_opt_lifetime_ref(&mut self, _: &Context, _: Span, _: &Option<ast::Lifetime>) { }
     fn check_lifetime_ref(&mut self, _: &Context, _: &ast::Lifetime) { }
-    fn check_lifetime_decl(&mut self, _: &Context, _: &ast::LifetimeDef) { }
+    fn check_lifetime_def(&mut self, _: &Context, _: &ast::LifetimeDef) { }
     fn check_explicit_self(&mut self, _: &Context, _: &ast::ExplicitSelf) { }
     fn check_mac(&mut self, _: &Context, _: &ast::Mac) { }
     fn check_path(&mut self, _: &Context, _: &ast::Path, _: ast::NodeId) { }

src/librustc/middle/resolve_lifetime.rs

@@ -226,7 +226,7 @@ impl<'a, 'v> Visitor<'v> for LifetimeContext<'a> {
         self.with(LateScope(&trait_ref.bound_lifetimes, self.scope), |this| {
             this.check_lifetime_defs(&trait_ref.bound_lifetimes);
             for lifetime in trait_ref.bound_lifetimes.iter() {
-                this.visit_lifetime_decl(lifetime);
+                this.visit_lifetime_def(lifetime);
             }
             this.visit_trait_ref(&trait_ref.trait_ref)
         })

src/librustc_back/svh.rs

@@ -181,7 +181,7 @@ mod svh_visitor {
         SawStructDef(token::InternedString),
 
         SawLifetimeRef(token::InternedString),
-        SawLifetimeDecl(token::InternedString),
+        SawLifetimeDef(token::InternedString),
 
         SawMod,
         SawViewItem,
@@ -414,8 +414,8 @@ mod svh_visitor {
             SawLifetimeRef(content(l.name)).hash(self.st);
         }
 
-        fn visit_lifetime_decl(&mut self, l: &LifetimeDef) {
-            SawLifetimeDecl(content(l.lifetime.name)).hash(self.st);
+        fn visit_lifetime_def(&mut self, l: &LifetimeDef) {
+            SawLifetimeDef(content(l.lifetime.name)).hash(self.st);
         }
 
         // We do recursively walk the bodies of functions/methods

src/libsyntax/ast_map/mod.rs

@@ -866,7 +866,7 @@ impl<'ast> Visitor<'ast> for NodeCollector<'ast> {
         self.insert(lifetime.id, NodeLifetime(lifetime));
     }
 
-    fn visit_lifetime_decl(&mut self, def: &'ast LifetimeDef) {
+    fn visit_lifetime_def(&mut self, def: &'ast LifetimeDef) {
         self.visit_lifetime_ref(&def.lifetime);
     }
 }

src/libsyntax/ast_util.rs

@@ -535,7 +535,7 @@ impl<'a, 'v, O: IdVisitingOperation> Visitor<'v> for IdVisitor<'a, O> {
         self.operation.visit_id(lifetime.id);
     }
 
-    fn visit_lifetime_decl(&mut self, def: &'v LifetimeDef) {
+    fn visit_lifetime_def(&mut self, def: &'v LifetimeDef) {
         self.visit_lifetime_ref(&def.lifetime);
     }
 }

src/libsyntax/feature_gate.rs

@@ -141,8 +141,8 @@ impl<'a> Context<'a> {
 }
 
 impl<'a, 'v> Visitor<'v> for Context<'a> {
-    fn visit_ident(&mut self, sp: Span, id: ast::Ident) {
-        if !token::get_ident(id).get().is_ascii() {
+    fn visit_name(&mut self, sp: Span, name: ast::Name) {
+        if !token::get_name(name).get().is_ascii() {
             self.gate_feature("non_ascii_idents", sp,
                               "non-ascii idents are not fully supported.");
         }

src/libsyntax/visit.rs

@@ -55,8 +55,11 @@ pub enum FnKind<'a> {
 /// new default implementation gets introduced.)
 pub trait Visitor<'v> {
 
-    fn visit_ident(&mut self, _sp: Span, _ident: Ident) {
-        /*! Visit the idents */
+    fn visit_name(&mut self, _span: Span, _name: Name) {
+        // Nothing to do.
+    }
+    fn visit_ident(&mut self, span: Span, ident: Ident) {
+        self.visit_name(span, ident.name);
     }
     fn visit_mod(&mut self, m: &'v Mod, _s: Span, _n: NodeId) { walk_mod(self, m) }
     fn visit_view_item(&mut self, i: &'v ViewItem) { walk_view_item(self, i) }
@@ -102,11 +105,11 @@ pub trait Visitor<'v> {
             None => ()
         }
     }
-    fn visit_lifetime_ref(&mut self, _lifetime: &'v Lifetime) {
-        /*! Visits a reference to a lifetime */
+    fn visit_lifetime_ref(&mut self, lifetime: &'v Lifetime) {
+        self.visit_name(lifetime.span, lifetime.name)
     }
-    fn visit_lifetime_decl(&mut self, _lifetime: &'v LifetimeDef) {
-        /*! Visits a declaration of a lifetime */
+    fn visit_lifetime_def(&mut self, lifetime: &'v LifetimeDef) {
+        walk_lifetime_def(self, lifetime)
     }
     fn visit_explicit_self(&mut self, es: &'v ExplicitSelf) {
         walk_explicit_self(self, es)
@@ -207,6 +210,14 @@ pub fn walk_local<'v, V: Visitor<'v>>(visitor: &mut V, local: &'v Local) {
     walk_expr_opt(visitor, &local.init);
 }
 
+pub fn walk_lifetime_def<'v, V: Visitor<'v>>(visitor: &mut V,
+                                              lifetime_def: &'v LifetimeDef) {
+    visitor.visit_lifetime_ref(&lifetime_def.lifetime);
+    for bound in lifetime_def.bounds.iter() {
+        visitor.visit_lifetime_ref(bound);
+    }
+}
+
 pub fn walk_explicit_self<'v, V: Visitor<'v>>(visitor: &mut V,
                                               explicit_self: &'v ExplicitSelf) {
     match explicit_self.node {
@@ -424,7 +435,7 @@ pub fn walk_ty<'v, V: Visitor<'v>>(visitor: &mut V, typ: &'v Ty) {
 pub fn walk_lifetime_decls_helper<'v, V: Visitor<'v>>(visitor: &mut V,
                                                       lifetimes: &'v Vec<LifetimeDef>) {
     for l in lifetimes.iter() {
-        visitor.visit_lifetime_decl(l);
+        visitor.visit_lifetime_def(l);
     }
 }
 
@@ -555,6 +566,7 @@ pub fn walk_ty_param_bound<'v, V: Visitor<'v>>(visitor: &mut V,
 
 pub fn walk_generics<'v, V: Visitor<'v>>(visitor: &mut V, generics: &'v Generics) {
     for type_parameter in generics.ty_params.iter() {
+        visitor.visit_ident(type_parameter.span, type_parameter.ident);
         walk_ty_param_bounds_helper(visitor, &type_parameter.bounds);
         match type_parameter.default {
             Some(ref ty) => visitor.visit_ty(&**ty),

src/test/compile-fail/utf8_idents.rs

@@ -0,0 +1,24 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+//
+// ignore-lexer-test FIXME #15679
+
+fn foo<
+    'β, //~ ERROR non-ascii idents are not fully supported.
+    γ  //~ ERROR non-ascii idents are not fully supported.
+>() {}
+
+struct X {
+    δ: uint //~ ERROR non-ascii idents are not fully supported.
+}
+
+pub fn main() {
+    let α = 0.00001f64; //~ ERROR non-ascii idents are not fully supported.
+}