Temporary bootstrapping hack: introduce syntax for r egion bounds like `'b:'a`,

meaning `'b outlives 'a`. Syntax currently does nothing but is needed for full
fix to #5763. To use this syntax, the issue_5763_bootstrap feature guard is
required.

3 files changed, 32 insertions, 7 deletions

diff --git a/src/libsyntax/ext/build.rs b/src/libsyntax/ext/build.rs
index d500600e25d..0e687c02c1d 100644
--- a/src/libsyntax/ext/build.rs
+++ b/src/libsyntax/ext/build.rs
@@ -73,6 +73,11 @@ pub trait AstBuilder {
     fn trait_ref(&self, path: ast::Path) -> ast::TraitRef;
     fn typarambound(&self, path: ast::Path) -> ast::TyParamBound;
     fn lifetime(&self, span: Span, ident: ast::Name) -> ast::Lifetime;
+    fn lifetime_def(&self,
+                    span: Span,
+                    name: ast::Name,
+                    bounds: Vec<ast::Lifetime>)
+                    -> ast::LifetimeDef;
 
     // statements
     fn stmt_expr(&self, expr: Gc<ast::Expr>) -> Gc<ast::Stmt>;
@@ -456,6 +461,17 @@ impl<'a> AstBuilder for ExtCtxt<'a> {
         ast::Lifetime { id: ast::DUMMY_NODE_ID, span: span, name: name }
     }
 
+    fn lifetime_def(&self,
+                    span: Span,
+                    name: ast::Name,
+                    bounds: Vec<ast::Lifetime>)
+                    -> ast::LifetimeDef {
+        ast::LifetimeDef {
+            lifetime: self.lifetime(span, name),
+            bounds: bounds
+        }
+    }
+
     fn stmt_expr(&self, expr: Gc<ast::Expr>) -> Gc<ast::Stmt> {
         box(GC) respan(expr.span, ast::StmtSemi(expr, ast::DUMMY_NODE_ID))
     }
diff --git a/src/libsyntax/ext/deriving/generic/mod.rs b/src/libsyntax/ext/deriving/generic/mod.rs
index 9225e4414c4..5842ca4a0d5 100644
--- a/src/libsyntax/ext/deriving/generic/mod.rs
+++ b/src/libsyntax/ext/deriving/generic/mod.rs
@@ -395,7 +395,7 @@ impl<'a> TraitDef<'a> {
         let mut ty_params = ty_params.into_vec();
 
         // Copy the lifetimes
-        lifetimes.extend(generics.lifetimes.iter().map(|l| *l));
+        lifetimes.extend(generics.lifetimes.iter().map(|l| (*l).clone()));
 
         // Create the type parameters.
         ty_params.extend(generics.ty_params.iter().map(|ty_param| {
@@ -429,7 +429,11 @@ impl<'a> TraitDef<'a> {
             cx.ty_ident(self.span, ty_param.ident)
         });
 
-        let self_lifetimes = generics.lifetimes.clone();
+        let self_lifetimes: Vec<ast::Lifetime> =
+            generics.lifetimes
+            .iter()
+            .map(|ld| ld.lifetime)
+            .collect();
 
         // Create the type of `self`.
         let self_type = cx.ty_path(
diff --git a/src/libsyntax/ext/deriving/generic/ty.rs b/src/libsyntax/ext/deriving/generic/ty.rs
index 5d8b5660698..2130b6f4e9d 100644
--- a/src/libsyntax/ext/deriving/generic/ty.rs
+++ b/src/libsyntax/ext/deriving/generic/ty.rs
@@ -174,7 +174,9 @@ impl<'a> Ty<'a> {
                 let self_params = self_generics.ty_params.map(|ty_param| {
                     cx.ty_ident(span, ty_param.ident)
                 });
-                let lifetimes = self_generics.lifetimes.clone();
+                let lifetimes = self_generics.lifetimes.iter()
+                                                       .map(|d| d.lifetime)
+                                                       .collect();
 
                 cx.path_all(span, false, vec!(self_ty), lifetimes,
                             self_params.into_vec())
@@ -200,7 +202,7 @@ fn mk_ty_param(cx: &ExtCtxt, span: Span, name: &str,
     cx.typaram(span, cx.ident_of(name), bounds, unbound, None)
 }
 
-fn mk_generics(lifetimes: Vec<ast::Lifetime>, ty_params: Vec<ast::TyParam> ) -> Generics {
+fn mk_generics(lifetimes: Vec<ast::LifetimeDef>, ty_params: Vec<ast::TyParam> ) -> Generics {
     Generics {
         lifetimes: lifetimes,
         ty_params: OwnedSlice::from_vec(ty_params)
@@ -210,7 +212,7 @@ fn mk_generics(lifetimes: Vec<ast::Lifetime>, ty_params: Vec<ast::TyParam> ) ->
 /// Lifetimes and bounds on type parameters
 #[deriving(Clone)]
 pub struct LifetimeBounds<'a> {
-    pub lifetimes: Vec<&'a str>,
+    pub lifetimes: Vec<(&'a str, Vec<&'a str>)>,
     pub bounds: Vec<(&'a str, Option<ast::TyParamBound>, Vec<Path<'a>>)>,
 }
 
@@ -226,8 +228,11 @@ impl<'a> LifetimeBounds<'a> {
                        self_ty: Ident,
                        self_generics: &Generics)
                        -> Generics {
-        let lifetimes = self.lifetimes.iter().map(|lt| {
-            cx.lifetime(span, cx.ident_of(*lt).name)
+        let lifetimes = self.lifetimes.iter().map(|&(ref lt, ref bounds)| {
+            let bounds =
+                bounds.iter().map(
+                    |b| cx.lifetime(span, cx.ident_of(*b).name)).collect();
+            cx.lifetime_def(span, cx.ident_of(*lt).name, bounds)
         }).collect();
         let ty_params = self.bounds.iter().map(|t| {
             match t {