Flag as unsafe several macros in the codebase for now.

Author: LeoTestard

src/librustc/hir/mod.rs

@@ -55,6 +55,7 @@ use std::fmt;
 /// of `Vec` to avoid keeping extra capacity.
 pub type HirVec<T> = P<[T]>;
 
+#[rustc_unsafe_macro]
 macro_rules! hir_vec {
     ($elem:expr; $n:expr) => (
         $crate::hir::HirVec::from(vec![$elem; $n])

src/librustc/lib.rs

@@ -33,6 +33,7 @@
 #![feature(libc)]
 #![feature(nonzero)]
 #![feature(quote)]
+#![feature(rustc_attrs)]
 #![feature(rustc_diagnostic_macros)]
 #![feature(rustc_private)]
 #![feature(slice_patterns)]

src/librustc/macros.rs

@@ -8,6 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#[rustc_unsafe_macro]
 macro_rules! enum_from_u32 {
     ($(#[$attr:meta])* pub enum $name:ident {
         $($variant:ident = $e:expr,)*

src/librustc_metadata/lib.rs

@@ -20,6 +20,7 @@
 #![feature(box_patterns)]
 #![feature(enumset)]
 #![feature(quote)]
+#![feature(rustc_attrs)]
 #![feature(rustc_diagnostic_macros)]
 #![feature(rustc_private)]
 #![feature(staged_api)]

src/librustc_metadata/macros.rs

@@ -8,6 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#[rustc_unsafe_macro]
 macro_rules! enum_from_u32 {
     ($(#[$attr:meta])* pub enum $name:ident {
         $($variant:ident = $e:expr,)*

src/librustc_mir/build/mod.rs

@@ -139,6 +139,7 @@ impl BlockAndExtension for BasicBlock {
 
 /// Update a block pointer and return the value.
 /// Use it like `let x = unpack!(block = self.foo(block, foo))`.
+#[rustc_unsafe_macro]
 macro_rules! unpack {
     ($x:ident = $c:expr) => {
         {

src/librustc_mir/lib.rs

@@ -22,6 +22,7 @@ Rust MIR: a lowered representation of Rust. Also: an experiment!
 
 #![feature(associated_consts)]
 #![feature(box_patterns)]
+#![feature(rustc_attrs)]
 #![feature(rustc_diagnostic_macros)]
 #![feature(rustc_private)]
 #![feature(staged_api)]

src/libsyntax/feature_gate.rs

@@ -48,6 +48,7 @@ macro_rules! setter {
     }}
 }
 
+#[rustc_unsafe_macro]
 macro_rules! declare_features {
     ($((active, $feature: ident, $ver: expr, $issue: expr)),+) => {
         /// Represents active features that are currently being implemented or

src/libsyntax/lib.rs

@@ -28,6 +28,7 @@
 #![feature(const_fn)]
 #![feature(filling_drop)]
 #![feature(libc)]
+#![feature(rustc_attrs)]
 #![feature(rustc_private)]
 #![feature(staged_api)]
 #![feature(str_escape)]

src/libsyntax/parse/parser.rs

@@ -148,6 +148,7 @@ macro_rules! maybe_whole_expr {
 }
 
 /// As maybe_whole_expr, but for things other than expressions
+#[rustc_unsafe_macro]
 macro_rules! maybe_whole {
     ($p:expr, $constructor:ident) => (
         {