Always resolve type@primitive as a primitive, not a module

Previously, if there were a module in scope with the same name as the
primitive, that would take precedence. Coupled with
https://github.com/rust-lang/rust/issues/58699, this made it impossible
to link to the primitive when that module was in scope.

This approach could be extended so that `struct@foo` would no longer resolve
to any type, etc. However, it could not be used for glob imports:

```rust
pub mod foo {
  pub struct Bar;
}

pub enum Bar {}
use foo::*;

// This is expected to link to `inner::Bar`, but instead it will link to the enum.
/// Link to [struct@Bar]
pub struct MyDocs;
```

The reason for this is that this change does not affect the resolution
algorithm of rustc_resolve at all. The only reason we could special-case
primitives is because we have a list of all possible primitives ahead of time.

1 files changed, 12 insertions, 0 deletions

diff --git a/src/test/rustdoc/intra-link-prim-precedence.rs b/src/test/rustdoc/intra-link-prim-precedence.rs
new file mode 100644
index 00000000000..ca83d5e2281
--- /dev/null
+++ b/src/test/rustdoc/intra-link-prim-precedence.rs
@@ -0,0 +1,12 @@
+// ignore-tidy-linelength
+#![deny(intra_doc_resolution_failure)]
+
+pub mod char {}
+
+/// See also [type@char]
+// @has intra_link_prim_precedence/struct.MyString.html '//a/@href' 'https://doc.rust-lang.org/nightly/std/primitive.char.html'
+pub struct MyString;
+
+/// See also [char]
+// @has intra_link_prim_precedence/struct.MyString2.html '//a/@href' 'intra_link_prim_precedence/char/index.html'
+pub struct MyString2;