Add more docs to templates for attrs with incorrect arguments

2 files changed, 47 insertions, 15 deletions

diff --git a/tests/ui/proc-macro/attribute.rs b/tests/ui/proc-macro/attribute.rs
index 988cdcd0403..dfb26738377 100644
--- a/tests/ui/proc-macro/attribute.rs
+++ b/tests/ui/proc-macro/attribute.rs
@@ -9,46 +9,55 @@ use proc_macro::*;
 #[proc_macro_derive]
 //~^ ERROR malformed `proc_macro_derive` attribute
 //~| NOTE expected this to be a list
+//~| NOTE for more information, visit
 pub fn foo1(input: TokenStream) -> TokenStream { input }
 
 #[proc_macro_derive = ""]
 //~^ ERROR malformed `proc_macro_derive` attribute
 //~| NOTE expected this to be a list
+//~| NOTE for more information, visit
 pub fn foo2(input: TokenStream) -> TokenStream { input }
 
 #[proc_macro_derive(d3, a, b)]
 //~^ ERROR malformed `proc_macro_derive` attribute
 //~| NOTE the only valid argument here is `attributes`
+//~| NOTE for more information, visit
 pub fn foo3(input: TokenStream) -> TokenStream { input }
 
 #[proc_macro_derive(d4, attributes(a), b)]
 //~^ ERROR malformed `proc_macro_derive` attribute
 //~| NOTE didn't expect any arguments here
+//~| NOTE for more information, visit
 pub fn foo4(input: TokenStream) -> TokenStream { input }
 
 #[proc_macro_derive("a")]
 //~^ ERROR malformed `proc_macro_derive` attribute
 //~| NOTE didn't expect a literal here
+//~| NOTE for more information, visit
 pub fn foo5(input: TokenStream) -> TokenStream { input }
 
 #[proc_macro_derive(d6 = "")]
 //~^ ERROR malformed `proc_macro_derive` attribute
 //~| NOTE didn't expect any arguments here
+//~| NOTE for more information, visit
 pub fn foo6(input: TokenStream) -> TokenStream { input }
 
 #[proc_macro_derive(m::d7)]
 //~^ ERROR malformed `proc_macro_derive` attribute
 //~| NOTE expected a valid identifier here
+//~| NOTE for more information, visit
 pub fn foo7(input: TokenStream) -> TokenStream { input }
 
 #[proc_macro_derive(d8(a))]
 //~^ ERROR malformed `proc_macro_derive` attribute
 //~| NOTE didn't expect any arguments here
+//~| NOTE for more information, visit
 pub fn foo8(input: TokenStream) -> TokenStream { input }
 
 #[proc_macro_derive(self)]
 //~^ ERROR malformed `proc_macro_derive` attribute
 //~| NOTE expected a valid identifier here
+//~| NOTE for more information, visit
 pub fn foo9(input: TokenStream) -> TokenStream { input }
 
 #[proc_macro_derive(PartialEq)] // OK
@@ -57,34 +66,41 @@ pub fn foo10(input: TokenStream) -> TokenStream { input }
 #[proc_macro_derive(d11, a)]
 //~^ ERROR malformed `proc_macro_derive` attribute
 //~| NOTE the only valid argument here is `attributes`
+//~| NOTE for more information, visit
 pub fn foo11(input: TokenStream) -> TokenStream { input }
 
 #[proc_macro_derive(d12, attributes)]
 //~^ ERROR malformed `proc_macro_derive` attribute
 //~| NOTE expected this to be a list
+//~| NOTE for more information, visit
 pub fn foo12(input: TokenStream) -> TokenStream { input }
 
 #[proc_macro_derive(d13, attributes("a"))]
 //~^ ERROR malformed `proc_macro_derive` attribute
 //~| NOTE expected a valid identifier here
+//~| NOTE for more information, visit
 pub fn foo13(input: TokenStream) -> TokenStream { input }
 
 #[proc_macro_derive(d14, attributes(a = ""))]
 //~^ ERROR malformed `proc_macro_derive` attribute
 //~| NOTE didn't expect any arguments here
+//~| NOTE for more information, visit
 pub fn foo14(input: TokenStream) -> TokenStream { input }
 
 #[proc_macro_derive(d15, attributes(m::a))]
 //~^ ERROR malformed `proc_macro_derive` attribute
 //~| NOTE expected a valid identifier here
+//~| NOTE for more information, visit
 pub fn foo15(input: TokenStream) -> TokenStream { input }
 
 #[proc_macro_derive(d16, attributes(a(b)))]
 //~^ ERROR malformed `proc_macro_derive` attribute
 //~| NOTE didn't expect any arguments here
+//~| NOTE for more information, visit
 pub fn foo16(input: TokenStream) -> TokenStream { input }
 
 #[proc_macro_derive(d17, attributes(self))]
 //~^ ERROR malformed `proc_macro_derive` attribute
 //~| NOTE expected a valid identifier here
+//~| NOTE for more information, visit
 pub fn foo17(input: TokenStream) -> TokenStream { input }
diff --git a/tests/ui/proc-macro/attribute.stderr b/tests/ui/proc-macro/attribute.stderr
index ea92e93e93f..e7127c8ef1d 100644
--- a/tests/ui/proc-macro/attribute.stderr
+++ b/tests/ui/proc-macro/attribute.stderr
@@ -4,6 +4,7 @@ error[E0539]: malformed `proc_macro_derive` attribute input
 LL | #[proc_macro_derive]
    | ^^^^^^^^^^^^^^^^^^^^ expected this to be a list
    |
+   = note: for more information, visit <https://doc.rust-lang.org/reference/procedural-macros.html#derive-macros>
 help: try changing it to one of the following valid forms of the attribute
    |
 LL | #[proc_macro_derive(TraitName)]
@@ -12,11 +13,12 @@ LL | #[proc_macro_derive(TraitName, attributes(name1, name2, ...))]
    |                    ++++++++++++++++++++++++++++++++++++++++++
 
 error[E0539]: malformed `proc_macro_derive` attribute input
-  --> $DIR/attribute.rs:14:1
+  --> $DIR/attribute.rs:15:1
    |
 LL | #[proc_macro_derive = ""]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^ expected this to be a list
    |
+   = note: for more information, visit <https://doc.rust-lang.org/reference/procedural-macros.html#derive-macros>
 help: try changing it to one of the following valid forms of the attribute
    |
 LL - #[proc_macro_derive = ""]
@@ -27,13 +29,14 @@ LL + #[proc_macro_derive(TraitName, attributes(name1, name2, ...))]
    |
 
 error[E0539]: malformed `proc_macro_derive` attribute input
-  --> $DIR/attribute.rs:19:1
+  --> $DIR/attribute.rs:21:1
    |
 LL | #[proc_macro_derive(d3, a, b)]
    | ^^^^^^^^^^^^^^^^^^^^^^^^-^^^^^
    |                         |
    |                         the only valid argument here is `attributes`
    |
+   = note: for more information, visit <https://doc.rust-lang.org/reference/procedural-macros.html#derive-macros>
 help: try changing it to one of the following valid forms of the attribute
    |
 LL - #[proc_macro_derive(d3, a, b)]
@@ -44,13 +47,14 @@ LL + #[proc_macro_derive(TraitName, attributes(name1, name2, ...))]
    |
 
 error[E0565]: malformed `proc_macro_derive` attribute input
-  --> $DIR/attribute.rs:24:1
+  --> $DIR/attribute.rs:27:1
    |
 LL | #[proc_macro_derive(d4, attributes(a), b)]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^-^^
    |                                        |
    |                                        didn't expect any arguments here
    |
+   = note: for more information, visit <https://doc.rust-lang.org/reference/procedural-macros.html#derive-macros>
 help: try changing it to one of the following valid forms of the attribute
    |
 LL - #[proc_macro_derive(d4, attributes(a), b)]
@@ -61,13 +65,14 @@ LL + #[proc_macro_derive(TraitName, attributes(name1, name2, ...))]
    |
 
 error[E0565]: malformed `proc_macro_derive` attribute input
-  --> $DIR/attribute.rs:29:1
+  --> $DIR/attribute.rs:33:1
    |
 LL | #[proc_macro_derive("a")]
    | ^^^^^^^^^^^^^^^^^^^^---^^
    |                     |
    |                     didn't expect a literal here
    |
+   = note: for more information, visit <https://doc.rust-lang.org/reference/procedural-macros.html#derive-macros>
 help: try changing it to one of the following valid forms of the attribute
    |
 LL - #[proc_macro_derive("a")]
@@ -78,13 +83,14 @@ LL + #[proc_macro_derive(TraitName, attributes(name1, name2, ...))]
    |
 
 error[E0565]: malformed `proc_macro_derive` attribute input
-  --> $DIR/attribute.rs:34:1
+  --> $DIR/attribute.rs:39:1
    |
 LL | #[proc_macro_derive(d6 = "")]
    | ^^^^^^^^^^^^^^^^^^^^^^^----^^
    |                        |
    |                        didn't expect any arguments here
    |
+   = note: for more information, visit <https://doc.rust-lang.org/reference/procedural-macros.html#derive-macros>
 help: try changing it to one of the following valid forms of the attribute
    |
 LL - #[proc_macro_derive(d6 = "")]
@@ -95,13 +101,14 @@ LL + #[proc_macro_derive(TraitName, attributes(name1, name2, ...))]
    |
 
 error[E0539]: malformed `proc_macro_derive` attribute input
-  --> $DIR/attribute.rs:39:1
+  --> $DIR/attribute.rs:45:1
    |
 LL | #[proc_macro_derive(m::d7)]
    | ^^^^^^^^^^^^^^^^^^^^-----^^
    |                     |
    |                     expected a valid identifier here
    |
+   = note: for more information, visit <https://doc.rust-lang.org/reference/procedural-macros.html#derive-macros>
 help: try changing it to one of the following valid forms of the attribute
    |
 LL - #[proc_macro_derive(m::d7)]
@@ -112,13 +119,14 @@ LL + #[proc_macro_derive(TraitName, attributes(name1, name2, ...))]
    |
 
 error[E0565]: malformed `proc_macro_derive` attribute input
-  --> $DIR/attribute.rs:44:1
+  --> $DIR/attribute.rs:51:1
    |
 LL | #[proc_macro_derive(d8(a))]
    | ^^^^^^^^^^^^^^^^^^^^^^---^^
    |                       |
    |                       didn't expect any arguments here
    |
+   = note: for more information, visit <https://doc.rust-lang.org/reference/procedural-macros.html#derive-macros>
 help: try changing it to one of the following valid forms of the attribute
    |
 LL - #[proc_macro_derive(d8(a))]
@@ -129,13 +137,14 @@ LL + #[proc_macro_derive(TraitName, attributes(name1, name2, ...))]
    |
 
 error[E0539]: malformed `proc_macro_derive` attribute input
-  --> $DIR/attribute.rs:49:1
+  --> $DIR/attribute.rs:57:1
    |
 LL | #[proc_macro_derive(self)]
    | ^^^^^^^^^^^^^^^^^^^^----^^
    |                     |
    |                     expected a valid identifier here
    |
+   = note: for more information, visit <https://doc.rust-lang.org/reference/procedural-macros.html#derive-macros>
 help: try changing it to one of the following valid forms of the attribute
    |
 LL - #[proc_macro_derive(self)]
@@ -146,13 +155,14 @@ LL + #[proc_macro_derive(TraitName, attributes(name1, name2, ...))]
    |
 
 error[E0539]: malformed `proc_macro_derive` attribute input
-  --> $DIR/attribute.rs:57:1
+  --> $DIR/attribute.rs:66:1
    |
 LL | #[proc_macro_derive(d11, a)]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^-^^
    |                          |
    |                          the only valid argument here is `attributes`
    |
+   = note: for more information, visit <https://doc.rust-lang.org/reference/procedural-macros.html#derive-macros>
 help: try changing it to one of the following valid forms of the attribute
    |
 LL - #[proc_macro_derive(d11, a)]
@@ -163,13 +173,14 @@ LL + #[proc_macro_derive(TraitName, attributes(name1, name2, ...))]
    |
 
 error[E0539]: malformed `proc_macro_derive` attribute input
-  --> $DIR/attribute.rs:62:1
+  --> $DIR/attribute.rs:72:1
    |
 LL | #[proc_macro_derive(d12, attributes)]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^----------^^
    |                          |
    |                          expected this to be a list
    |
+   = note: for more information, visit <https://doc.rust-lang.org/reference/procedural-macros.html#derive-macros>
 help: try changing it to one of the following valid forms of the attribute
    |
 LL - #[proc_macro_derive(d12, attributes)]
@@ -180,13 +191,14 @@ LL + #[proc_macro_derive(TraitName, attributes(name1, name2, ...))]
    |
 
 error[E0539]: malformed `proc_macro_derive` attribute input
-  --> $DIR/attribute.rs:67:1
+  --> $DIR/attribute.rs:78:1
    |
 LL | #[proc_macro_derive(d13, attributes("a"))]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^---^^^
    |                                     |
    |                                     expected a valid identifier here
    |
+   = note: for more information, visit <https://doc.rust-lang.org/reference/procedural-macros.html#derive-macros>
 help: try changing it to one of the following valid forms of the attribute
    |
 LL - #[proc_macro_derive(d13, attributes("a"))]
@@ -197,13 +209,14 @@ LL + #[proc_macro_derive(TraitName, attributes(name1, name2, ...))]
    |
 
 error[E0565]: malformed `proc_macro_derive` attribute input
-  --> $DIR/attribute.rs:72:1
+  --> $DIR/attribute.rs:84:1
    |
 LL | #[proc_macro_derive(d14, attributes(a = ""))]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^----^^^
    |                                       |
    |                                       didn't expect any arguments here
    |
+   = note: for more information, visit <https://doc.rust-lang.org/reference/procedural-macros.html#derive-macros>
 help: try changing it to one of the following valid forms of the attribute
    |
 LL - #[proc_macro_derive(d14, attributes(a = ""))]
@@ -214,13 +227,14 @@ LL + #[proc_macro_derive(TraitName, attributes(name1, name2, ...))]
    |
 
 error[E0539]: malformed `proc_macro_derive` attribute input
-  --> $DIR/attribute.rs:77:1
+  --> $DIR/attribute.rs:90:1
    |
 LL | #[proc_macro_derive(d15, attributes(m::a))]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^----^^^
    |                                     |
    |                                     expected a valid identifier here
    |
+   = note: for more information, visit <https://doc.rust-lang.org/reference/procedural-macros.html#derive-macros>
 help: try changing it to one of the following valid forms of the attribute
    |
 LL - #[proc_macro_derive(d15, attributes(m::a))]
@@ -231,13 +245,14 @@ LL + #[proc_macro_derive(TraitName, attributes(name1, name2, ...))]
    |
 
 error[E0565]: malformed `proc_macro_derive` attribute input
-  --> $DIR/attribute.rs:82:1
+  --> $DIR/attribute.rs:96:1
    |
 LL | #[proc_macro_derive(d16, attributes(a(b)))]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^---^^^
    |                                      |
    |                                      didn't expect any arguments here
    |
+   = note: for more information, visit <https://doc.rust-lang.org/reference/procedural-macros.html#derive-macros>
 help: try changing it to one of the following valid forms of the attribute
    |
 LL - #[proc_macro_derive(d16, attributes(a(b)))]
@@ -248,13 +263,14 @@ LL + #[proc_macro_derive(TraitName, attributes(name1, name2, ...))]
    |
 
 error[E0539]: malformed `proc_macro_derive` attribute input
-  --> $DIR/attribute.rs:87:1
+  --> $DIR/attribute.rs:102:1
    |
 LL | #[proc_macro_derive(d17, attributes(self))]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^----^^^
    |                                     |
    |                                     expected a valid identifier here
    |
+   = note: for more information, visit <https://doc.rust-lang.org/reference/procedural-macros.html#derive-macros>
 help: try changing it to one of the following valid forms of the attribute
    |
 LL - #[proc_macro_derive(d17, attributes(self))]