Surround PhantomData in backticks

Author: varkor

src/librustc_lint/types.rs

@@ -903,7 +903,7 @@ impl<'a, 'tcx> ImproperCTypesVisitor<'a, 'tcx> {
                 self.cx.span_lint(IMPROPER_CTYPES,
                                   sp,
                                   &format!("`extern` block uses type `{}` which is not FFI-safe: \
-                                            composed only of PhantomData", ty));
+                                            composed only of `PhantomData`", ty));
             }
             FfiResult::FfiUnsafe { ty: unsafe_ty, reason, help } => {
                 let msg = format!("`extern` block uses type `{}` which is not FFI-safe: {}",

src/test/ui/lint/lint-ctypes.rs

@@ -1,7 +1,7 @@
-#![deny(improper_ctypes)]
 #![feature(rustc_private)]
 
 #![allow(private_in_public)]
+#![deny(improper_ctypes)]
 
 extern crate libc;
 
@@ -55,9 +55,9 @@ extern {
     pub fn tuple_type(p: (i32, i32)); //~ ERROR uses type `(i32, i32)`
     pub fn tuple_type2(p: I32Pair); //~ ERROR uses type `(i32, i32)`
     pub fn zero_size(p: ZeroSize); //~ ERROR struct has no fields
-    pub fn zero_size_phantom(p: ZeroSizeWithPhantomData); //~ ERROR composed only of PhantomData
+    pub fn zero_size_phantom(p: ZeroSizeWithPhantomData); //~ ERROR composed only of `PhantomData`
     pub fn zero_size_phantom_toplevel()
-        -> ::std::marker::PhantomData<bool>; //~ ERROR: composed only of PhantomData
+        -> ::std::marker::PhantomData<bool>; //~ ERROR: composed only of `PhantomData`
     pub fn fn_type(p: RustFn); //~ ERROR function pointer has Rust-specific
     pub fn fn_type2(p: fn()); //~ ERROR function pointer has Rust-specific
     pub fn fn_contained(p: RustBadRet); //~ ERROR: uses type `std::boxed::Box<u32>`

src/test/ui/lint/lint-ctypes.stderr

@@ -5,7 +5,7 @@ LL |     pub fn ptr_type1(size: *const Foo);
    |                            ^^^^^^^^^^
    |
 note: lint level defined here
-  --> $DIR/lint-ctypes.rs:1:9
+  --> $DIR/lint-ctypes.rs:4:9
    |
 LL | #![deny(improper_ctypes)]
    |         ^^^^^^^^^^^^^^^
@@ -108,13 +108,13 @@ note: type defined here
 LL | pub struct ZeroSize;
    | ^^^^^^^^^^^^^^^^^^^^
 
-error: `extern` block uses type `ZeroSizeWithPhantomData` which is not FFI-safe: composed only of PhantomData
+error: `extern` block uses type `ZeroSizeWithPhantomData` which is not FFI-safe: composed only of `PhantomData`
   --> $DIR/lint-ctypes.rs:58:33
    |
 LL |     pub fn zero_size_phantom(p: ZeroSizeWithPhantomData);
    |                                 ^^^^^^^^^^^^^^^^^^^^^^^
 
-error: `extern` block uses type `std::marker::PhantomData<bool>` which is not FFI-safe: composed only of PhantomData
+error: `extern` block uses type `std::marker::PhantomData<bool>` which is not FFI-safe: composed only of `PhantomData`
   --> $DIR/lint-ctypes.rs:60:12
    |
 LL |         -> ::std::marker::PhantomData<bool>;