use syntax::attr;
use syntax::ptr::P;
use syntax::symbol::keywords;
-use syntax_pos::Span;
+use syntax_pos::{mk_sp, Span};
use errors::DiagnosticBuilder;
use util::nodemap::{NodeMap, NodeSet, FxHashSet, FxHashMap, DefIdMap};
use rustc_back::slice;
self.check_lifetime_def_for_shadowing(old_scope, &lifetime_i.lifetime);
for bound in &lifetime_i.bounds {
- self.resolve_lifetime_ref(bound);
+ if !bound.is_static() {
+ self.resolve_lifetime_ref(bound);
+ } else {
+ self.insert_lifetime(bound, Region::Static);
+ let full_span = mk_sp(lifetime_i.lifetime.span.lo, bound.span.hi);
+ self.sess.struct_span_warn(full_span,
+ &format!("unnecessary lifetime parameter `{}`", lifetime_i.lifetime.name))
+ .help(&format!("you can use the `'static` lifetime directly, in place \
+ of `{}`", lifetime_i.lifetime.name))
+ .emit();
+ }
}
}
}
--- /dev/null
+// Copyright 2017 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.
+
+fn f<'a: 'static>(_: &'a i32) {} //~WARN unnecessary lifetime parameter `'a`
+
+fn main() {
+ let x = 0;
+ f(&x); //~ERROR does not live long enough
+}