libsyntax: Separate multiple inherited traits with `+`

17 files changed, 30 insertions, 24 deletions

diff --git a/src/libsyntax/parse/parser.rs b/src/libsyntax/parse/parser.rs
index dd179171fce..5013b2c919f 100644
--- a/src/libsyntax/parse/parser.rs
+++ b/src/libsyntax/parse/parser.rs
@@ -3112,7 +3112,7 @@ pub impl Parser {
     fn parse_trait_ref_list(&self, ket: &token::Token) -> ~[@trait_ref] {
         self.parse_seq_to_before_end(
             ket,
-            seq_sep_none(),
+            seq_sep_trailing_disallowed(token::BINOP(token::PLUS)),
             |p| p.parse_trait_ref()
         )
     }
diff --git a/src/libsyntax/print/pprust.rs b/src/libsyntax/print/pprust.rs
index 735344e43be..d307e3964e7 100644
--- a/src/libsyntax/print/pprust.rs
+++ b/src/libsyntax/print/pprust.rs
@@ -600,8 +600,11 @@ pub fn print_item(s: @ps, &&item: @ast::item) {
         print_generics(s, generics);
         if traits.len() != 0u {
             word(s.s, ~":");
-            for traits.each |trait_| {
+            for traits.eachi |i, trait_| {
                 nbsp(s);
+                if i != 0 {
+                    word_space(s, ~"+");
+                }
                 print_path(s, trait_.path, false);
             }
         }
diff --git a/src/test/auxiliary/trait_inheritance_auto_xc_aux.rs b/src/test/auxiliary/trait_inheritance_auto_xc_aux.rs
index 3e26a09fb8f..ecd43686b77 100644
--- a/src/test/auxiliary/trait_inheritance_auto_xc_aux.rs
+++ b/src/test/auxiliary/trait_inheritance_auto_xc_aux.rs
@@ -12,6 +12,6 @@ trait Foo { fn f() -> int; }
 trait Bar { fn g() -> int; }
 trait Baz { fn h() -> int; }
 
-trait Quux: Foo Bar Baz { }
+trait Quux: Foo + Bar + Baz { }
 
 impl<T:Foo + Bar + Baz> Quux for T { }
diff --git a/src/test/auxiliary/trait_inheritance_overloading_xc.rs b/src/test/auxiliary/trait_inheritance_overloading_xc.rs
index 10a7238a3f7..e86f7cfd26a 100644
--- a/src/test/auxiliary/trait_inheritance_overloading_xc.rs
+++ b/src/test/auxiliary/trait_inheritance_overloading_xc.rs
@@ -10,7 +10,7 @@
 
 use core::cmp::Eq;
 
-pub trait MyNum : Add<Self,Self> Sub<Self,Self> Mul<Self,Self> Eq {
+pub trait MyNum : Add<Self,Self> + Sub<Self,Self> + Mul<Self,Self> + Eq {
 }
 
 pub struct MyInt {
diff --git a/src/test/compile-fail/issue-3953.rs b/src/test/compile-fail/issue-3953.rs
index c88a94ef629..afd8cf89233 100644
--- a/src/test/compile-fail/issue-3953.rs
+++ b/src/test/compile-fail/issue-3953.rs
@@ -10,12 +10,15 @@
 
 use core::cmp::Eq;
 
-trait Hahaha: Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq //~ ERROR Duplicate supertrait in trait declaration
-              Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq
-              Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq
-              Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq
-              Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq
-              Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq Eq {}
+trait Hahaha: Eq + Eq + Eq + Eq + Eq + //~ ERROR Duplicate supertrait
+              Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq +
+              Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq +
+              Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq +
+              Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq +
+              Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq +
+              Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq +
+              Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq + Eq +
+              Eq {}
 
 enum Lol = int;
 
diff --git a/src/test/run-pass/trait-inheritance-auto-xc-2.rs b/src/test/run-pass/trait-inheritance-auto-xc-2.rs
index c3333fa10ab..6b8dd43d58b 100644
--- a/src/test/run-pass/trait-inheritance-auto-xc-2.rs
+++ b/src/test/run-pass/trait-inheritance-auto-xc-2.rs
@@ -17,7 +17,7 @@ extern mod aux(name = "trait_inheritance_auto_xc_2_aux");
 use aux::{Foo, Bar, Baz, A};
 
 // We want to extend all Foo, Bar, Bazes to Quuxes
-pub trait Quux: Foo Bar Baz { }
+pub trait Quux: Foo + Bar + Baz { }
 impl<T:Foo + Bar + Baz> Quux for T { }
 
 fn f<T:Quux>(a: &T) {
diff --git a/src/test/run-pass/trait-inheritance-auto.rs b/src/test/run-pass/trait-inheritance-auto.rs
index 5d576193880..7ebbc8e83cb 100644
--- a/src/test/run-pass/trait-inheritance-auto.rs
+++ b/src/test/run-pass/trait-inheritance-auto.rs
@@ -16,7 +16,7 @@ trait Foo { fn f() -> int; }
 trait Bar { fn g() -> int; }
 trait Baz { fn h() -> int; }
 
-trait Quux: Foo Bar Baz { }
+trait Quux: Foo + Bar + Baz { }
 
 struct A { x: int }
 
diff --git a/src/test/run-pass/trait-inheritance-diamond.rs b/src/test/run-pass/trait-inheritance-diamond.rs
index 1d6e4823091..a4a3991f9e8 100644
--- a/src/test/run-pass/trait-inheritance-diamond.rs
+++ b/src/test/run-pass/trait-inheritance-diamond.rs
@@ -13,7 +13,7 @@
 trait A { fn a(&self) -> int; }
 trait B: A { fn b(&self) -> int; }
 trait C: A { fn c(&self) -> int; }
-trait D: B C { fn d(&self) -> int; }
+trait D: B + C { fn d(&self) -> int; }
 
 struct S { bogus: () }
 
diff --git a/src/test/run-pass/trait-inheritance-num.rs b/src/test/run-pass/trait-inheritance-num.rs
index 36b1e6cd4de..92cb25b8d2b 100644
--- a/src/test/run-pass/trait-inheritance-num.rs
+++ b/src/test/run-pass/trait-inheritance-num.rs
@@ -16,9 +16,9 @@ use core::num::NumCast::from;
 extern mod std;
 use std::cmp::FuzzyEq;
 
-pub trait NumExt: NumCast Eq Ord {}
+pub trait NumExt: NumCast + Eq + Ord {}
 
-pub trait FloatExt: NumExt FuzzyEq<Self> {}
+pub trait FloatExt: NumExt + FuzzyEq<Self> {}
 
 fn greater_than_one<T:NumExt>(n: &T) -> bool { *n > from(1) }
 fn greater_than_one_float<T:FloatExt>(n: &T) -> bool { *n > from(1) }
diff --git a/src/test/run-pass/trait-inheritance-num0.rs b/src/test/run-pass/trait-inheritance-num0.rs
index 70eed496db3..7f0d4d77b62 100644
--- a/src/test/run-pass/trait-inheritance-num0.rs
+++ b/src/test/run-pass/trait-inheritance-num0.rs
@@ -19,7 +19,7 @@ trait Num {
     fn gt(&self, other: &Self) -> bool;
 }
 
-pub trait NumExt: Num NumCast { }
+pub trait NumExt: Num + NumCast { }
 
 fn greater_than_one<T:NumExt>(n: &T) -> bool {
     n.gt(&from(1))
diff --git a/src/test/run-pass/trait-inheritance-num1.rs b/src/test/run-pass/trait-inheritance-num1.rs
index 44b4bd60f1d..07b9772af29 100644
--- a/src/test/run-pass/trait-inheritance-num1.rs
+++ b/src/test/run-pass/trait-inheritance-num1.rs
@@ -11,7 +11,7 @@
 use core::cmp::Ord;
 use core::num::NumCast::from;
 
-pub trait NumExt: NumCast Ord { }
+pub trait NumExt: NumCast + Ord { }
 
 fn greater_than_one<T:NumExt>(n: &T) -> bool {
     *n > from(1)
diff --git a/src/test/run-pass/trait-inheritance-num2.rs b/src/test/run-pass/trait-inheritance-num2.rs
index 5c9d9e6a13b..8f8b83c3d76 100644
--- a/src/test/run-pass/trait-inheritance-num2.rs
+++ b/src/test/run-pass/trait-inheritance-num2.rs
@@ -38,7 +38,7 @@ impl TypeExt for f64 {}
 impl TypeExt for float {}
 
 
-pub trait NumExt: TypeExt Eq Ord NumCast {}
+pub trait NumExt: TypeExt + Eq + Ord + NumCast {}
 
 impl NumExt for u8 {}
 impl NumExt for u16 {}
@@ -94,7 +94,7 @@ impl IntegerExt for i64 {}
 impl IntegerExt for int {}
 
 
-pub trait FloatExt: NumExt FuzzyEq<Self> {}
+pub trait FloatExt: NumExt + FuzzyEq<Self> {}
 
 impl FloatExt for f32 {}
 impl FloatExt for f64 {}
diff --git a/src/test/run-pass/trait-inheritance-num3.rs b/src/test/run-pass/trait-inheritance-num3.rs
index c2cd56ad107..67861709e76 100644
--- a/src/test/run-pass/trait-inheritance-num3.rs
+++ b/src/test/run-pass/trait-inheritance-num3.rs
@@ -11,7 +11,7 @@
 use core::cmp::{Eq, Ord};
 use core::num::NumCast::from;
 
-pub trait NumExt: Eq Ord NumCast {}
+pub trait NumExt: Eq + Ord + NumCast {}
 
 impl NumExt for f32 {}
 
diff --git a/src/test/run-pass/trait-inheritance-num5.rs b/src/test/run-pass/trait-inheritance-num5.rs
index ac8d80359d8..2efe5b23eb5 100644
--- a/src/test/run-pass/trait-inheritance-num5.rs
+++ b/src/test/run-pass/trait-inheritance-num5.rs
@@ -11,7 +11,7 @@
 use core::cmp::{Eq, Ord};
 use core::num::NumCast::from;
 
-pub trait NumExt: Eq NumCast {}
+pub trait NumExt: Eq + NumCast {}
 
 impl NumExt for f32 {}
 impl NumExt for int {}
diff --git a/src/test/run-pass/trait-inheritance-overloading.rs b/src/test/run-pass/trait-inheritance-overloading.rs
index 54a9ea9ad1e..a4d7e33891f 100644
--- a/src/test/run-pass/trait-inheritance-overloading.rs
+++ b/src/test/run-pass/trait-inheritance-overloading.rs
@@ -10,7 +10,7 @@
 
 use core::cmp::Eq;
 
-trait MyNum : Add<Self,Self> Sub<Self,Self> Mul<Self,Self> Eq { }
+trait MyNum : Add<Self,Self> + Sub<Self,Self> + Mul<Self,Self> + Eq { }
 
 struct MyInt { val: int }
 
diff --git a/src/test/run-pass/trait-inheritance-static2.rs b/src/test/run-pass/trait-inheritance-static2.rs
index 6f706ad0be7..ccc7f1fc4c0 100644
--- a/src/test/run-pass/trait-inheritance-static2.rs
+++ b/src/test/run-pass/trait-inheritance-static2.rs
@@ -14,7 +14,7 @@ trait MyNum {
     static fn from_int(int) -> Self;
 }
 
-pub trait NumExt: MyEq MyNum { }
+pub trait NumExt: MyEq + MyNum { }
 
 struct S { v: int }
 
diff --git a/src/test/run-pass/trait-inheritance2.rs b/src/test/run-pass/trait-inheritance2.rs
index 55a63e9099a..5925888650d 100644
--- a/src/test/run-pass/trait-inheritance2.rs
+++ b/src/test/run-pass/trait-inheritance2.rs
@@ -12,7 +12,7 @@ trait Foo { fn f() -> int; }
 trait Bar { fn g() -> int; }
 trait Baz { fn h() -> int; }
 
-trait Quux: Foo Bar Baz { }
+trait Quux: Foo + Bar + Baz { }
 
 struct A { x: int }