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librustc: Require the #[derivable] attribute, remove the significance of "impl Foo : Bar;", and allow only a subset of methods in a trait to be derived. r=brson

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This commit is contained in:
Patrick Walton 2012-11-13 19:08:01 -08:00
parent 3e14ada4f6
commit 32ad4ae4cd
29 changed files with 335 additions and 272 deletions
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6
src/libsyntax/fold.rs
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@ -249,13 +249,11 @@ fn noop_fold_item_underscore(i: item_, fld: ast_fold) -> item_ {
let struct_def = fold_struct_def(struct_def, fld);
item_class(struct_def, /* FIXME (#2543) */ copy typms)
}
item_impl(tps, ifce, ty, ref methods_opt) => {
item_impl(tps, ifce, ty, ref methods) => {
item_impl(fold_ty_params(tps, fld),
ifce.map(|p| fold_trait_ref(*p, fld)),
fld.fold_ty(ty),
option::map(methods_opt,
|methods| vec::map(
*methods, |x| fld.fold_method(*x))))
vec::map(*methods, |x| fld.fold_method(*x)))
}
item_trait(tps, traits, methods) => {
let methods = do methods.map |method| {