Remove E0019, use E0015 for inline assembly in a const

Author: ecstatic-morse

compiler/rustc_error_codes/src/error_codes.rs

@@ -18,7 +18,6 @@ E0010: include_str!("./error_codes/E0010.md"),
 E0013: include_str!("./error_codes/E0013.md"),
 E0014: include_str!("./error_codes/E0014.md"),
 E0015: include_str!("./error_codes/E0015.md"),
-E0019: include_str!("./error_codes/E0019.md"),
 E0023: include_str!("./error_codes/E0023.md"),
 E0025: include_str!("./error_codes/E0025.md"),
 E0026: include_str!("./error_codes/E0026.md"),
@@ -461,6 +460,7 @@ E0774: include_str!("./error_codes/E0774.md"),
 ;
 //  E0006, // merged with E0005
 //  E0008, // cannot bind by-move into a pattern guard
+//  E0019, merged into E0015
 //  E0035, merged into E0087/E0089
 //  E0036, merged into E0087/E0089
 //  E0068,

compiler/rustc_error_codes/src/error_codes/E0019.md

@@ -193,8 +193,8 @@ impl NonConstOp for InlineAsm {
         struct_span_err!(
             ccx.tcx.sess,
             span,
-            E0019,
-            "{} contains unimplemented expression type",
+            E0015,
+            "inline assembly is not allowed in {}s",
             ccx.const_kind()
         )
     }

compiler/rustc_mir/src/transform/check_consts/ops.rs

@@ -1,6 +1,6 @@
 #![feature(llvm_asm)]
 
 const _: () = unsafe { llvm_asm!("nop") };
-//~^ ERROR contains unimplemented expression type
+//~^ ERROR inline assembly
 
 fn main() {}

src/test/ui/consts/inline_asm.rs

@@ -1,4 +1,4 @@
-error[E0019]: constant contains unimplemented expression type
+error[E0015]: inline assembly is not allowed in constants
   --> $DIR/inline_asm.rs:3:24
    |
 LL | const _: () = unsafe { llvm_asm!("nop") };
@@ -8,4 +8,4 @@ LL | const _: () = unsafe { llvm_asm!("nop") };
 
 error: aborting due to previous error
 
-For more information about this error, try `rustc --explain E0019`.
+For more information about this error, try `rustc --explain E0015`.