Remove needless lifetimes

3 files changed, 5 insertions, 5 deletions

diff --git a/src/libsyntax/attr/mod.rs b/src/libsyntax/attr/mod.rs
index 436620ae729..453b6ebf3c4 100644
--- a/src/libsyntax/attr/mod.rs
+++ b/src/libsyntax/attr/mod.rs
@@ -440,12 +440,12 @@ pub fn contains_name(attrs: &[Attribute], name: Symbol) -> bool {
     })
 }
 
-pub fn find_by_name<'a>(attrs: &'a [Attribute], name: Symbol) -> Option<&'a Attribute> {
+pub fn find_by_name(attrs: &[Attribute], name: Symbol) -> Option<&Attribute> {
     attrs.iter().find(|attr| attr.check_name(name))
 }
 
-pub fn filter_by_name<'a>(attrs: &'a [Attribute], name: Symbol)
-    -> impl Iterator<Item = &'a Attribute> {
+pub fn filter_by_name(attrs: &[Attribute], name: Symbol)
+                      -> impl Iterator<Item=&Attribute> {
     attrs.iter().filter(move |attr| attr.check_name(name))
 }
 
diff --git a/src/libsyntax/ext/tt/macro_parser.rs b/src/libsyntax/ext/tt/macro_parser.rs
index 92ce3779a3c..fc8aa4793bc 100644
--- a/src/libsyntax/ext/tt/macro_parser.rs
+++ b/src/libsyntax/ext/tt/macro_parser.rs
@@ -901,7 +901,7 @@ fn may_begin_with(token: &Token, name: Name) -> bool {
 /// # Returns
 ///
 /// The parsed non-terminal.
-fn parse_nt<'a>(p: &mut Parser<'a>, sp: Span, name: Symbol) -> Nonterminal {
+fn parse_nt(p: &mut Parser<'_>, sp: Span, name: Symbol) -> Nonterminal {
     if name == sym::tt {
         return token::NtTT(p.parse_token_tree());
     }
diff --git a/src/libsyntax/util/parser_testing.rs b/src/libsyntax/util/parser_testing.rs
index 733c4f83e37..f037a09e9b4 100644
--- a/src/libsyntax/util/parser_testing.rs
+++ b/src/libsyntax/util/parser_testing.rs
@@ -20,7 +20,7 @@ pub fn string_to_stream(source_str: String) -> TokenStream {
 }
 
 /// Map string to parser (via tts)
-pub fn string_to_parser<'a>(ps: &'a ParseSess, source_str: String) -> Parser<'a> {
+pub fn string_to_parser(ps: &ParseSess, source_str: String) -> Parser {
     new_parser_from_source_str(ps, PathBuf::from("bogofile").into(), source_str)
 }