From c3e54217e855a2492d9b707eb3fb7cdb6702d45a Mon Sep 17 00:00:00 2001
From: Vadim Petrochenkov <vadim.petrochenkov@gmail.com>
Date: Mon, 23 Jul 2018 02:52:51 +0300
Subject: resolve: Implement prelude search for macro paths

resolve/expansion: Implement tool attributes
---
 src/libsyntax/ext/base.rs | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src/libsyntax/ext/base.rs')

diff --git a/src/libsyntax/ext/base.rs b/src/libsyntax/ext/base.rs
index b55c4f99206..8450daa3f7c 100644
--- a/src/libsyntax/ext/base.rs
+++ b/src/libsyntax/ext/base.rs
@@ -588,6 +588,9 @@ impl MacroKind {
 
 /// An enum representing the different kinds of syntax extensions.
 pub enum SyntaxExtension {
+    /// A trivial "extension" that does nothing, only keeps the attribute and marks it as known.
+    NonMacroAttr,
+
     /// A syntax extension that is attached to an item and creates new items
     /// based upon it.
     ///
@@ -667,6 +670,7 @@ impl SyntaxExtension {
             SyntaxExtension::IdentTT(..) |
             SyntaxExtension::ProcMacro { .. } =>
                 MacroKind::Bang,
+            SyntaxExtension::NonMacroAttr |
             SyntaxExtension::MultiDecorator(..) |
             SyntaxExtension::MultiModifier(..) |
             SyntaxExtension::AttrProcMacro(..) =>
@@ -696,6 +700,7 @@ impl SyntaxExtension {
             SyntaxExtension::AttrProcMacro(.., edition) |
             SyntaxExtension::ProcMacroDerive(.., edition) => edition,
             // Unstable legacy stuff
+            SyntaxExtension::NonMacroAttr |
             SyntaxExtension::IdentTT(..) |
             SyntaxExtension::MultiDecorator(..) |
             SyntaxExtension::MultiModifier(..) |
-- 
cgit 1.4.1-3-g733a5