Rollup merge of rust-lang#76955 - jyn514:refactor-diagnostics, r=euclio

Refactor and fix intra-doc link diagnostics, and fix links to primitives

Closes rust-lang#76925, closes rust-lang#76693, closes rust-lang#76692.

Originally I only meant to fix rust-lang#76925. But the hack with `has_primitive` was so bad it was easier to fix the primitive issues than to try and work around it.

Note that this still has one bug: `std::primitive::i32::MAX` does not resolve. However, this fixes the ICE so I'm fine with fixing the link in a later PR.

This is part of a series of refactors to make rust-lang#76467 possible.

This is best reviewed commit-by-commit; it has detailed commit messages.

r? @euclio

compiler/rustc_hir/src/hir.rs

@@ -2004,6 +2004,30 @@ pub enum PrimTy {
     Char,
 }
 
+impl PrimTy {
+    pub fn name_str(self) -> &'static str {
+        match self {
+            PrimTy::Int(i) => i.name_str(),
+            PrimTy::Uint(u) => u.name_str(),
+            PrimTy::Float(f) => f.name_str(),
+            PrimTy::Str => "str",
+            PrimTy::Bool => "bool",
+            PrimTy::Char => "char",
+        }
+    }
+
+    pub fn name(self) -> Symbol {
+        match self {
+            PrimTy::Int(i) => i.name(),
+            PrimTy::Uint(u) => u.name(),
+            PrimTy::Float(f) => f.name(),
+            PrimTy::Str => sym::str,
+            PrimTy::Bool => sym::bool,
+            PrimTy::Char => sym::char,
+        }
+    }
+}
+
 #[derive(Debug, HashStable_Generic)]
 pub struct BareFnTy<'hir> {
     pub unsafety: Unsafety,

src/test/rustdoc-ui/deny-intra-link-resolution-failure.stderr

@@ -2,7 +2,7 @@ error: unresolved link to `v2`
   --> $DIR/deny-intra-link-resolution-failure.rs:3:6
    |
 LL | /// [v2]
-   |      ^^ no item named `v2` in `deny_intra_link_resolution_failure`
+   |      ^^ the module `deny_intra_link_resolution_failure` contains no item named `v2`
    |
 note: the lint level is defined here
   --> $DIR/deny-intra-link-resolution-failure.rs:1:9

src/test/rustdoc-ui/intra-link-errors.rs

@@ -6,19 +6,23 @@
 
 /// [path::to::nonexistent::module]
 //~^ ERROR unresolved link
-//~| NOTE no item named `path` in `intra_link_errors`
+//~| NOTE `intra_link_errors` contains no item named `path`
 
 /// [path::to::nonexistent::macro!]
 //~^ ERROR unresolved link
-//~| NOTE no item named `path` in `intra_link_errors`
+//~| NOTE `intra_link_errors` contains no item named `path`
 
 /// [type@path::to::nonexistent::type]
 //~^ ERROR unresolved link
-//~| NOTE no item named `path` in `intra_link_errors`
+//~| NOTE `intra_link_errors` contains no item named `path`
 
 /// [std::io::not::here]
 //~^ ERROR unresolved link
-//~| NOTE the module `io` has no inner item
+//~| NOTE `io` contains no item named `not`
+
+/// [type@std::io::not::here]
+//~^ ERROR unresolved link
+//~| NOTE `io` contains no item named `not`
 
 /// [std::io::Error::x]
 //~^ ERROR unresolved link
@@ -32,6 +36,10 @@
 //~^ ERROR unresolved link
 //~| NOTE `f` is a function, not a module
 
+/// [f::A!]
+//~^ ERROR unresolved link
+//~| NOTE `f` is a function, not a module
+
 /// [S::A]
 //~^ ERROR unresolved link
 //~| NOTE struct `S` has no field or associated item
@@ -46,7 +54,16 @@
 
 /// [u8::not_found]
 //~^ ERROR unresolved link
-//~| NOTE the builtin type `u8` does not have an associated item named `not_found`
+//~| NOTE the builtin type `u8` has no associated item named `not_found`
+
+/// [std::primitive::u8::not_found]
+//~^ ERROR unresolved link
+//~| NOTE the builtin type `u8` has no associated item named `not_found`
+
+/// [type@Vec::into_iter]
+//~^ ERROR unresolved link
+//~| HELP to link to the associated function, add parentheses
+//~| NOTE this link resolves to the associated function `into_iter`
 
 /// [S!]
 //~^ ERROR unresolved link

src/test/rustdoc-ui/intra-link-errors.stderr

@@ -2,7 +2,7 @@ error: unresolved link to `path::to::nonexistent::module`
   --> $DIR/intra-link-errors.rs:7:6
    |
 LL | /// [path::to::nonexistent::module]
-   |      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no item named `path` in `intra_link_errors`
+   |      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the module `intra_link_errors` contains no item named `path`
    |
 note: the lint level is defined here
   --> $DIR/intra-link-errors.rs:1:9
@@ -14,64 +14,91 @@ error: unresolved link to `path::to::nonexistent::macro`
   --> $DIR/intra-link-errors.rs:11:6
    |
 LL | /// [path::to::nonexistent::macro!]
-   |      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no item named `path` in `intra_link_errors`
+   |      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the module `intra_link_errors` contains no item named `path`
 
 error: unresolved link to `path::to::nonexistent::type`
   --> $DIR/intra-link-errors.rs:15:6
    |
 LL | /// [type@path::to::nonexistent::type]
-   |      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no item named `path` in `intra_link_errors`
+   |      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the module `intra_link_errors` contains no item named `path`
 
 error: unresolved link to `std::io::not::here`
   --> $DIR/intra-link-errors.rs:19:6
    |
 LL | /// [std::io::not::here]
-   |      ^^^^^^^^^^^^^^^^^^ the module `io` has no inner item named `not`
+   |      ^^^^^^^^^^^^^^^^^^ the module `io` contains no item named `not`
 
-error: unresolved link to `std::io::Error::x`
+error: unresolved link to `std::io::not::here`
   --> $DIR/intra-link-errors.rs:23:6
    |
+LL | /// [type@std::io::not::here]
+   |      ^^^^^^^^^^^^^^^^^^^^^^^ the module `io` contains no item named `not`
+
+error: unresolved link to `std::io::Error::x`
+  --> $DIR/intra-link-errors.rs:27:6
+   |
 LL | /// [std::io::Error::x]
    |      ^^^^^^^^^^^^^^^^^ the struct `Error` has no field or associated item named `x`
 
 error: unresolved link to `std::io::ErrorKind::x`
-  --> $DIR/intra-link-errors.rs:27:6
+  --> $DIR/intra-link-errors.rs:31:6
    |
 LL | /// [std::io::ErrorKind::x]
    |      ^^^^^^^^^^^^^^^^^^^^^ the enum `ErrorKind` has no variant or associated item named `x`
 
 error: unresolved link to `f::A`
-  --> $DIR/intra-link-errors.rs:31:6
+  --> $DIR/intra-link-errors.rs:35:6
    |
 LL | /// [f::A]
    |      ^^^^ `f` is a function, not a module or type, and cannot have associated items
 
+error: unresolved link to `f::A`
+  --> $DIR/intra-link-errors.rs:39:6
+   |
+LL | /// [f::A!]
+   |      ^^^^^ `f` is a function, not a module or type, and cannot have associated items
+
 error: unresolved link to `S::A`
-  --> $DIR/intra-link-errors.rs:35:6
+  --> $DIR/intra-link-errors.rs:43:6
    |
 LL | /// [S::A]
    |      ^^^^ the struct `S` has no field or associated item named `A`
 
 error: unresolved link to `S::fmt`
-  --> $DIR/intra-link-errors.rs:39:6
+  --> $DIR/intra-link-errors.rs:47:6
    |
 LL | /// [S::fmt]
    |      ^^^^^^ the struct `S` has no field or associated item named `fmt`
 
 error: unresolved link to `E::D`
-  --> $DIR/intra-link-errors.rs:43:6
+  --> $DIR/intra-link-errors.rs:51:6
    |
 LL | /// [E::D]
    |      ^^^^ the enum `E` has no variant or associated item named `D`
 
 error: unresolved link to `u8::not_found`
-  --> $DIR/intra-link-errors.rs:47:6
+  --> $DIR/intra-link-errors.rs:55:6
    |
 LL | /// [u8::not_found]
-   |      ^^^^^^^^^^^^^ the builtin type `u8` does not have an associated item named `not_found`
+   |      ^^^^^^^^^^^^^ the builtin type `u8` has no associated item named `not_found`
+
+error: unresolved link to `std::primitive::u8::not_found`
+  --> $DIR/intra-link-errors.rs:59:6
+   |
+LL | /// [std::primitive::u8::not_found]
+   |      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the builtin type `u8` has no associated item named `not_found`
+
+error: unresolved link to `Vec::into_iter`
+  --> $DIR/intra-link-errors.rs:63:6
+   |
+LL | /// [type@Vec::into_iter]
+   |      ^^^^^^^^^^^^^^^^^^^
+   |      |
+   |      this link resolves to the associated function `into_iter`, which is not in the type namespace
+   |      help: to link to the associated function, add parentheses: `Vec::into_iter()`
 
 error: unresolved link to `S`
-  --> $DIR/intra-link-errors.rs:51:6
+  --> $DIR/intra-link-errors.rs:68:6
    |
 LL | /// [S!]
    |      ^^
@@ -80,7 +107,7 @@ LL | /// [S!]
    |      help: to link to the struct, prefix with `struct@`: `struct@S`
 
 error: unresolved link to `T::g`
-  --> $DIR/intra-link-errors.rs:69:6
+  --> $DIR/intra-link-errors.rs:86:6
    |
 LL | /// [type@T::g]
    |      ^^^^^^^^^
@@ -89,13 +116,13 @@ LL | /// [type@T::g]
    |      help: to link to the associated function, add parentheses: `T::g()`
 
 error: unresolved link to `T::h`
-  --> $DIR/intra-link-errors.rs:74:6
+  --> $DIR/intra-link-errors.rs:91:6
    |
 LL | /// [T::h!]
    |      ^^^^^ the trait `T` has no macro named `h`
 
 error: unresolved link to `S::h`
-  --> $DIR/intra-link-errors.rs:61:6
+  --> $DIR/intra-link-errors.rs:78:6
    |
 LL | /// [type@S::h]
    |      ^^^^^^^^^
@@ -104,13 +131,13 @@ LL | /// [type@S::h]
    |      help: to link to the associated function, add parentheses: `S::h()`
 
 error: unresolved link to `m`
-  --> $DIR/intra-link-errors.rs:81:6
+  --> $DIR/intra-link-errors.rs:98:6
    |
 LL | /// [m()]
    |      ^^^
    |      |
    |      this link resolves to the macro `m`, which is not in the value namespace
    |      help: to link to the macro, add an exclamation mark: `m!`
 
-error: aborting due to 16 previous errors
+error: aborting due to 20 previous errors
 

src/test/rustdoc-ui/intra-link-span-ice-55723.stderr

@@ -2,7 +2,7 @@ error: unresolved link to `i`
   --> $DIR/intra-link-span-ice-55723.rs:9:10
    |
 LL | /// （arr[i]）
-   |           ^ no item named `i` in `intra_link_span_ice_55723`
+   |           ^ the module `intra_link_span_ice_55723` contains no item named `i`
    |
 note: the lint level is defined here
   --> $DIR/intra-link-span-ice-55723.rs:1:9

src/test/rustdoc-ui/intra-links-warning-crlf.stderr

@@ -2,7 +2,7 @@ warning: unresolved link to `error`
   --> $DIR/intra-links-warning-crlf.rs:7:6
    |
 LL | /// [error]
-   |      ^^^^^ no item named `error` in `intra_links_warning_crlf`
+   |      ^^^^^ the module `intra_links_warning_crlf` contains no item named `error`
    |
    = note: `#[warn(broken_intra_doc_links)]` on by default
    = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
@@ -11,23 +11,23 @@ warning: unresolved link to `error1`
   --> $DIR/intra-links-warning-crlf.rs:12:11
    |
 LL | /// docs [error1]
-   |           ^^^^^^ no item named `error1` in `intra_links_warning_crlf`
+   |           ^^^^^^ the module `intra_links_warning_crlf` contains no item named `error1`
    |
    = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
 
 warning: unresolved link to `error2`
   --> $DIR/intra-links-warning-crlf.rs:15:11
    |
 LL | /// docs [error2]
-   |           ^^^^^^ no item named `error2` in `intra_links_warning_crlf`
+   |           ^^^^^^ the module `intra_links_warning_crlf` contains no item named `error2`
    |
    = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
 
 warning: unresolved link to `error`
   --> $DIR/intra-links-warning-crlf.rs:23:20
    |
 LL |  * It also has an [error].
-   |                    ^^^^^ no item named `error` in `intra_links_warning_crlf`
+   |                    ^^^^^ the module `intra_links_warning_crlf` contains no item named `error`
    |
    = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`