Remove more anonymous trait method parameters

src/librustc/diagnostics.rs

@@ -614,7 +614,7 @@ use std::mem::transmute;
 struct Foo<T>(Vec<T>);
 
 trait MyTransmutableType: Sized {
-    fn transmute(Vec<Self>) -> Foo<Self>;
+    fn transmute(_: Vec<Self>) -> Foo<Self>;
 }
 
 impl MyTransmutableType for u8 {

src/librustc_resolve/diagnostics.rs

@@ -837,7 +837,7 @@ impl Something {} // ok!
 trait Foo {
     type N;
 
-    fn bar(Self::N); // ok!
+    fn bar(_: Self::N); // ok!
 }
 
 // or:

src/librustc_typeck/diagnostics.rs

@@ -2476,7 +2476,7 @@ trait T2 {
     type Bar;
 
     // error: Baz is used but not declared
-    fn return_bool(&self, &Self::Bar, &Self::Baz) -> bool;
+    fn return_bool(&self, _: &Self::Bar, _: &Self::Baz) -> bool;
 }
 ```
 
@@ -2498,7 +2498,7 @@ trait T2 {
     type Baz; // we declare `Baz` in our trait.
 
     // and now we can use it here:
-    fn return_bool(&self, &Self::Bar, &Self::Baz) -> bool;
+    fn return_bool(&self, _: &Self::Bar, _: &Self::Baz) -> bool;
 }
 ```
 "##,

src/test/compile-fail/associated-types-ICE-when-projecting-out-of-err.rs

@@ -25,7 +25,7 @@ pub trait Sized {
 trait Add<RHS=Self> {
     type Output;
 
-    fn add(self, RHS) -> Self::Output;
+    fn add(self, _: RHS) -> Self::Output;
 }
 
 fn ice<A>(a: A) {

src/test/compile-fail/issue-13853-5.rs

@@ -11,7 +11,7 @@
 trait Deserializer<'a> { }
 
 trait Deserializable {
-    fn deserialize_token<'a, D: Deserializer<'a>>(D, &'a str) -> Self;
+    fn deserialize_token<'a, D: Deserializer<'a>>(_: D, _: &'a str) -> Self;
 }
 
 impl<'a, T: Deserializable> Deserializable for &'a str {

src/test/compile-fail/issue-18400.rs

@@ -9,8 +9,8 @@
 // except according to those terms.
 
 trait Set<T> {
-    fn contains(&self, T) -> bool;
+    fn contains(&self, _: T) -> bool;
-    fn set(&mut self, T);
+    fn set(&mut self, _: T);
 }
 
 impl<'a, T, S> Set<&'a [T]> for S where

src/test/compile-fail/issue-20831-debruijn.rs

@@ -22,7 +22,7 @@ pub trait Subscriber {
 
 pub trait Publisher<'a> {
     type Output;
-    fn subscribe(&mut self, Box<Subscriber<Input=Self::Output> + 'a>);
+    fn subscribe(&mut self, _: Box<Subscriber<Input=Self::Output> + 'a>);
 }
 
 pub trait Processor<'a> : Subscriber + Publisher<'a> { }

src/test/compile-fail/issue-35869.rs

@@ -11,9 +11,9 @@
 #![feature(conservative_impl_trait)]
 
 trait Foo {
-    fn foo(fn(u8) -> ()); //~ NOTE type in trait
+    fn foo(_: fn(u8) -> ()); //~ NOTE type in trait
-    fn bar(Option<u8>); //~ NOTE type in trait
+    fn bar(_: Option<u8>); //~ NOTE type in trait
-    fn baz((u8, u16)); //~ NOTE type in trait
+    fn baz(_: (u8, u16)); //~ NOTE type in trait
     fn qux() -> u8; //~ NOTE type in trait
 }
 

src/test/compile-fail/type-params-in-different-spaces-2.rs

@@ -12,7 +12,7 @@
 // type parameters on a trait correctly.
 
 trait Tr<T> : Sized {
-    fn op(T) -> Self;
+    fn op(_: T) -> Self;
 }
 
 trait A:    Tr<Self> {

src/test/compile-fail/variance-trait-bounds.rs

@@ -19,7 +19,7 @@ trait Getter<T> {
 }
 
 trait Setter<T> {
-    fn get(&self, T);
+    fn get(&self, _: T);
 }
 
 #[rustc_variance]

src/test/run-pass/associated-types-projection-in-object-type.rs

@@ -26,7 +26,7 @@ pub trait Subscriber {
 
 pub trait Publisher<'a> {
     type Output;
-    fn subscribe(&mut self, Box<Subscriber<Input=Self::Output> + 'a>);
+    fn subscribe(&mut self, _: Box<Subscriber<Input=Self::Output> + 'a>);
 }
 
 pub trait Processor<'a> : Subscriber + Publisher<'a> { }

src/test/run-pass/auxiliary/issue_3979_traits.rs

@@ -13,7 +13,7 @@
 #![crate_type = "lib"]
 
 pub trait Positioned {
-  fn SetX(&mut self, isize);
+  fn SetX(&mut self, _: isize);
   fn X(&self) -> isize;
 }
 

src/test/run-pass/auxiliary/xcrate-trait-lifetime-param.rs

@@ -9,5 +9,5 @@
 // except according to those terms.
 
 pub trait FromBuf<'a> {
-    fn from_buf(&'a [u8]) -> Self;
+    fn from_buf(_: &'a [u8]) -> Self;
 }

src/test/run-pass/dropck_legal_cycles.rs

@@ -442,7 +442,7 @@ pub fn main() {
 }
 
 trait Named {
-    fn new(&'static str) -> Self;
+    fn new(_: &'static str) -> Self;
     fn name(&self) -> &str;
 }
 
@@ -932,9 +932,9 @@ trait Context {
 }
 
 trait PrePost<T> {
-    fn pre(&mut self, &T);
+    fn pre(&mut self, _: &T);
-    fn post(&mut self, &T);
+    fn post(&mut self, _: &T);
-    fn hit_limit(&mut self, &T);
+    fn hit_limit(&mut self, _: &T);
 }
 
 trait Children<'a> {

src/test/run-pass/issue-13105.rs

@@ -11,6 +11,7 @@
 // pretty-expanded FIXME #23616
 
 trait Foo {
+    #[allow(anonymous_parameters)]
     fn quux(u8) {}
 }
 

src/test/run-pass/issue-13775.rs

@@ -11,6 +11,7 @@
 // pretty-expanded FIXME #23616
 
 trait Foo {
+    #[allow(anonymous_parameters)]
     fn bar(&self, isize) {}
 }
 

src/test/run-pass/issue-14919.rs

@@ -26,7 +26,7 @@ impl<'a, 'b> Matcher for CharPredMatcher<'a, 'b> {
 }
 
 trait IntoMatcher<'a, T> {
-    fn into_matcher(self, &'a str) -> T;
+    fn into_matcher(self, _: &'a str) -> T;
 }
 
 impl<'a, 'b, F> IntoMatcher<'a, CharPredMatcher<'a, 'b>> for F where F: FnMut(char) -> bool + 'b {

src/test/run-pass/issue-19098.rs

@@ -9,7 +9,7 @@
 // except according to those terms.
 
 pub trait Handler {
-    fn handle(&self, &mut String);
+    fn handle(&self, _: &mut String);
 }
 
 impl<F> Handler for F where F: for<'a, 'b> Fn(&'a mut String) {

src/test/run-pass/issue-21726.rs

@@ -23,7 +23,7 @@ fn foo<'a>(s: &'a str) {
 
 trait IntoRef<'a> {
     type T: Clone;
-    fn into_ref(self, &'a str) -> Self::T;
+    fn into_ref(self, _: &'a str) -> Self::T;
 }
 
 impl<'a> IntoRef<'a> for () {

src/test/run-pass/issue-34074.rs

@@ -8,9 +8,10 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// Make sure several unnamed function arguments don't conflict with each other
+// Make sure several unnamed function parameters don't conflict with each other
 
 trait Tr {
+    #[allow(anonymous_parameters)]
     fn f(u8, u8) {}
 }
 

src/test/run-pass/issue-3979-generics.rs

@@ -12,7 +12,7 @@
 use std::ops::Add;
 
 trait Positioned<S> {
-  fn SetX(&mut self, S);
+  fn SetX(&mut self, _: S);
   fn X(&self) -> S;
 }
 

src/test/run-pass/issue-3979.rs

@@ -10,7 +10,7 @@
 
 
 trait Positioned {
-  fn SetX(&mut self, isize);
+  fn SetX(&mut self, _: isize);
   fn X(&self) -> isize;
 }
 

src/test/run-pass/issue-4107.rs

@@ -13,7 +13,7 @@ pub fn main() {
     let _id: &Mat2<f64> = &Matrix::identity(1.0);
 }
 
-pub trait Index<Index,Result> { fn get(&self, Index) -> Result { panic!() } }
+pub trait Index<Index,Result> { fn get(&self, _: Index) -> Result { panic!() } }
 pub trait Dimensional<T>: Index<usize, T> { }
 
 pub struct Mat2<T> { x: T }

src/test/run-pass/issue-6128.rs

@@ -14,9 +14,8 @@
 use std::collections::HashMap;
 
 trait Graph<Node, Edge> {
-    fn f(&self, Edge);
+    fn f(&self, _: Edge);
-    fn g(&self, Node);
+    fn g(&self, _: Node);
-
 }
 
 impl<E> Graph<isize, E> for HashMap<isize, isize> {

src/test/run-pass/issue-6157.rs

@@ -10,7 +10,7 @@
 
 // pretty-expanded FIXME #23616
 
-pub trait OpInt { fn call(&mut self, isize, isize) -> isize; }
+pub trait OpInt { fn call(&mut self, _: isize, _: isize) -> isize; }
 
 impl<F> OpInt for F where F: FnMut(isize, isize) -> isize {
     fn call(&mut self, a:isize, b:isize) -> isize {

src/test/run-pass/issue-9129.rs

@@ -13,7 +13,7 @@
 #![allow(unknown_features)]
 #![feature(box_syntax)]
 
-pub trait bomb { fn boom(&self, Ident); }
+pub trait bomb { fn boom(&self, _: Ident); }
 pub struct S;
 impl bomb for S { fn boom(&self, _: Ident) { } }
 

src/test/run-pass/regions-early-bound-trait-param.rs

@@ -63,7 +63,7 @@ fn make_val<T:MakerTrait>() -> T {
 }
 
 trait RefMakerTrait<'q> {
-    fn mk(Self) -> &'q Self;
+    fn mk(_: Self) -> &'q Self;
 }
 
 fn make_ref<'r, T:RefMakerTrait<'r>>(t:T) -> &'r T {

src/test/run-pass/supertrait-default-generics.rs

@@ -14,7 +14,7 @@
 use std::ops::Add;
 
 trait Positioned<S> {
-  fn SetX(&mut self, S);
+  fn SetX(&mut self, _: S);
   fn X(&self) -> S;
 }
 

src/test/run-pass/trait-inheritance-static.rs

@@ -10,7 +10,7 @@
 
 
 pub trait MyNum {
-    fn from_int(isize) -> Self;
+    fn from_int(_: isize) -> Self;
 }
 
 pub trait NumExt: MyNum { }

src/test/run-pass/trait-inheritance-static2.rs

@@ -11,7 +11,7 @@
 pub trait MyEq {}
 
 pub trait MyNum {
-    fn from_int(isize) -> Self;
+    fn from_int(_: isize) -> Self;
 }
 
 pub trait NumExt: MyEq + MyNum { }

src/test/run-pass/trait-object-generics.rs

@@ -41,7 +41,7 @@ impl<A1, A2, A3> Impl<A1, A2, A3> {
 enum Type<T> { Constant(T) }
 
 trait Trait<K,V> {
-    fn method(&self,Type<(K,V)>) -> isize;
+    fn method(&self, _: Type<(K,V)>) -> isize;
 }
 
 impl<V> Trait<u8,V> for () {

src/test/run-pass/where-clause-bounds-inconsistency.rs

@@ -15,10 +15,10 @@ trait Bound {
 }
 
 trait Trait {
-    fn a<T>(&self, T) where T: Bound;
+    fn a<T>(&self, _: T) where T: Bound;
-    fn b<T>(&self, T) where T: Bound;
+    fn b<T>(&self, _: T) where T: Bound;
-    fn c<T: Bound>(&self, T);
+    fn c<T: Bound>(&self, _: T);
-    fn d<T: Bound>(&self, T);
+    fn d<T: Bound>(&self, _: T);
 }
 
 impl Trait for bool {

src/test/ui/span/issue-7575.rs

@@ -12,12 +12,12 @@
 // ignore-tidy-linelength
 
 trait CtxtFn {
-    fn f8(self, usize) -> usize;
+    fn f8(self, _: usize) -> usize;
-    fn f9(usize) -> usize; //~ NOTE candidate
+    fn f9(_: usize) -> usize; //~ NOTE candidate
 }
 
 trait OtherTrait {
-    fn f9(usize) -> usize; //~ NOTE candidate
+    fn f9(_: usize) -> usize; //~ NOTE candidate
 }
 
 // Note: this trait is not implemented, but we can't really tell
@@ -26,7 +26,7 @@ trait OtherTrait {
 // candidate. This seems not unreasonable -- perhaps the user meant to
 // implement it, after all.
 trait UnusedTrait {
-    fn f9(usize) -> usize; //~ NOTE candidate
+    fn f9(_: usize) -> usize; //~ NOTE candidate
 }
 
 impl CtxtFn for usize {

src/test/ui/span/issue-7575.stderr

@@ -8,20 +8,20 @@ error[E0599]: no method named `f9` found for type `usize` in the current scope
 note: candidate #1 is defined in the trait `CtxtFn`
   --> $DIR/issue-7575.rs:16:5
    |
-16 |     fn f9(usize) -> usize; //~ NOTE candidate
+16 |     fn f9(_: usize) -> usize; //~ NOTE candidate
-   |     ^^^^^^^^^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
    = help: to disambiguate the method call, write `CtxtFn::f9(u, 342)` instead
 note: candidate #2 is defined in the trait `OtherTrait`
   --> $DIR/issue-7575.rs:20:5
    |
-20 |     fn f9(usize) -> usize; //~ NOTE candidate
+20 |     fn f9(_: usize) -> usize; //~ NOTE candidate
-   |     ^^^^^^^^^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
    = help: to disambiguate the method call, write `OtherTrait::f9(u, 342)` instead
 note: candidate #3 is defined in the trait `UnusedTrait`
   --> $DIR/issue-7575.rs:29:5
    |
-29 |     fn f9(usize) -> usize; //~ NOTE candidate
+29 |     fn f9(_: usize) -> usize; //~ NOTE candidate
-   |     ^^^^^^^^^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
    = help: to disambiguate the method call, write `UnusedTrait::f9(u, 342)` instead
    = help: items from traits can only be used if the trait is implemented and in scope
    = note: the following traits define an item `f9`, perhaps you need to implement one of them: