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rustc: Add appropriate type predicates for references. Simple uses of references/region pointers now work.

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This commit is contained in:
Patrick Walton 2012-03-08 17:22:10 -08:00
parent 256146bba4
commit 8ce6b0dd21
1 changed files with 4 additions and 3 deletions
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7
src/rustc/middle/ty.rs
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@ -739,7 +739,7 @@ pure fn type_is_unique(ty: t) -> bool {
pure fn type_is_scalar(ty: t) -> bool {
alt get(ty).struct {
ty_nil | ty_bool | ty_int(_) | ty_float(_) | ty_uint(_) |
ty_send_type | ty_type | ty_ptr(_) { true }
ty_send_type | ty_type | ty_ptr(_) | ty_rptr(_, _) { true }
_ { false }
}
}
@ -760,7 +760,7 @@ fn type_needs_drop(cx: ctxt, ty: t) -> bool {
let result = alt get(ty).struct {
// scalar types
ty_nil | ty_bot | ty_bool | ty_int(_) | ty_float(_) | ty_uint(_) |
ty_type | ty_ptr(_) { false }
ty_type | ty_ptr(_) | ty_rptr(_, _) { false }
ty_rec(flds) {
for f in flds { if type_needs_drop(cx, f.mt.ty) { accum = true; } }
accum
@ -852,6 +852,7 @@ fn type_kind(cx: ctxt, ty: t) -> kind {
// Those with refcounts-to-inner raise pinned to shared,
// lower unique to shared. Therefore just set result to shared.
ty_box(_) | ty_iface(_, _) | ty_opaque_box { kind_copyable }
ty_rptr(_, _) { kind_copyable }
// Boxes and unique pointers raise pinned to shared.
ty_vec(tm) | ty_uniq(tm) { type_kind(cx, tm.ty) }
// Records lower to the lowest of their members.
@ -1012,7 +1013,7 @@ fn type_is_pod(cx: ctxt, ty: t) -> bool {
ty_send_type | ty_type | ty_ptr(_) { result = true; }
// Boxed types
ty_str | ty_box(_) | ty_uniq(_) | ty_vec(_) | ty_fn(_) |
ty_iface(_, _) | ty_opaque_box { result = false; }
ty_iface(_, _) | ty_rptr(_,_) | ty_opaque_box { result = false; }
// Structural types
ty_enum(did, tps) {
let variants = enum_variants(cx, did);