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Teach fold about ty_obj.

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This commit is contained in:
Graydon Hoare 2010-12-30 17:46:35 -08:00
parent 0f914e6d35
commit a99713265b
1 changed files with 24 additions and 0 deletions
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24
src/comp/middle/fold.rs
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@ -51,6 +51,9 @@ type ast_fold[ENV] =
(fn(&ENV e, &span sp,
vec[ast.ty_field] elts) -> @ty) fold_ty_rec,
(fn(&ENV e, &span sp,
vec[ast.ty_method] meths) -> @ty) fold_ty_obj,
(fn(&ENV e, &span sp,
vec[rec(ast.mode mode, @ty ty)] inputs,
@ty output) -> @ty) fold_ty_fn,
@ -291,6 +294,21 @@ fn fold_ty[ENV](&ENV env, ast_fold[ENV] fld, @ty t) -> @ty {
ret fld.fold_ty_rec(env_, t.span, flds_);
}
case (ast.ty_obj(?meths)) {
let vec[ast.ty_method] meths_ = vec();
for (ast.ty_method m in meths) {
auto tfn = fld.fold_ty_fn(env_, t.span,
m.inputs, m.output);
alt (tfn.node) {
case (ast.ty_fn(?ins, ?out)) {
append[ast.ty_method]
(meths_, rec(inputs=ins, output=out with m));
}
}
}
ret fld.fold_ty_obj(env_, t.span, meths_);
}
case (ast.ty_path(?pth, ?ref_opt)) {
let vec[ast.name] path = vec();
for (ast.name n in pth) {
@ -787,6 +805,11 @@ fn identity_fold_ty_rec[ENV](&ENV env, &span sp,
ret @respan(sp, ast.ty_rec(elts));
}
fn identity_fold_ty_obj[ENV](&ENV env, &span sp,
vec[ast.ty_method] meths) -> @ty {
ret @respan(sp, ast.ty_obj(meths));
}
fn identity_fold_ty_fn[ENV](&ENV env, &span sp,
vec[rec(ast.mode mode, @ty ty)] inputs,
@ty output) -> @ty {
@ -1091,6 +1114,7 @@ fn new_identity_fold[ENV]() -> ast_fold[ENV] {
fold_ty_vec = bind identity_fold_ty_vec[ENV](_,_,_),
fold_ty_tup = bind identity_fold_ty_tup[ENV](_,_,_),
fold_ty_rec = bind identity_fold_ty_rec[ENV](_,_,_),
fold_ty_obj = bind identity_fold_ty_obj[ENV](_,_,_),
fold_ty_fn = bind identity_fold_ty_fn[ENV](_,_,_,_),
fold_ty_path = bind identity_fold_ty_path[ENV](_,_,_,_),
fold_ty_mutable = bind identity_fold_ty_mutable[ENV](_,_,_),