From 751dcdf606d4ff3b27b1c820535304bfb022170c Mon Sep 17 00:00:00 2001
From: varkor <github@varkor.com>
Date: Tue, 5 Feb 2019 16:48:45 +0100
Subject: [PATCH] Add Const kind to AST

Co-Authored-By: Gabriel Smith <yodaldevoid@users.noreply.github.com>
---
 src/libsyntax/ast.rs | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/src/libsyntax/ast.rs b/src/libsyntax/ast.rs
index 2cfe2cc896cb..57a3bf86b0e5 100644
--- a/src/libsyntax/ast.rs
+++ b/src/libsyntax/ast.rs
@@ -167,6 +167,17 @@ impl GenericArgs {
 pub enum GenericArg {
     Lifetime(Lifetime),
     Type(P<Ty>),
+    Const(AnonConst),
+}
+
+impl GenericArg {
+    pub fn span(&self) -> Span {
+        match self {
+            GenericArg::Lifetime(lt) => lt.ident.span,
+            GenericArg::Type(ty) => ty.span,
+            GenericArg::Const(ct) => ct.value.span,
+        }
+    }
 }
 
 /// A path like `Foo<'a, T>`
@@ -300,9 +311,8 @@ pub type GenericBounds = Vec<GenericBound>;
 pub enum GenericParamKind {
     /// A lifetime definition (e.g., `'a: 'b + 'c + 'd`).
     Lifetime,
-    Type {
-        default: Option<P<Ty>>,
-    },
+    Type { default: Option<P<Ty>> },
+    Const { ty: P<Ty> },
 }
 
 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]