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Translate ast.box unary expressions and support extraction of TypeRefs from AST annotations.

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This commit is contained in:
Graydon Hoare 2010-11-05 18:31:02 -07:00
parent ffb3861c70
commit 216082d040
1 changed files with 25 additions and 3 deletions
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28
src/comp/middle/trans.rs
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@ -451,7 +451,20 @@ impure fn trans_lit(@block_ctxt cx, &ast.lit lit) -> result {
}
}
impure fn trans_unary(@block_ctxt cx, ast.unop op, &ast.expr e) -> result {
fn node_type(@trans_ctxt cx, &ast.ann a) -> TypeRef {
alt (a) {
case (ast.ann_none) {
log "missing type annotation";
fail;
}
case (ast.ann_type(?t)) {
ret type_of(cx, t);
}
}
}
impure fn trans_unary(@block_ctxt cx, ast.unop op,
&ast.expr e, &ast.ann a) -> result {
auto sub = trans_expr(cx, e);
@ -469,6 +482,15 @@ impure fn trans_unary(@block_ctxt cx, ast.unop op, &ast.expr e) -> result {
sub.val = cx.build.Neg(sub.val);
ret sub;
}
case (ast.box) {
auto e_ty = node_type(cx.fcx.tcx, a);
auto box_ty = T_box(e_ty);
sub.val = cx.build.Malloc(box_ty);
auto rc = sub.bcx.build.GEP(sub.val,
vec(C_int(0),
C_int(abi.box_rc_field_refcnt)));
ret res(sub.bcx, cx.build.Store(C_int(1), rc));
}
}
cx.fcx.tcx.sess.unimpl("expr variant in trans_unary");
fail;
@ -759,8 +781,8 @@ impure fn trans_expr(@block_ctxt cx, &ast.expr e) -> result {
ret trans_lit(cx, *lit);
}
case (ast.expr_unary(?op, ?x, _)) {
ret trans_unary(cx, op, *x);
case (ast.expr_unary(?op, ?x, ?ann)) {
ret trans_unary(cx, op, *x, ann);
}
case (ast.expr_binary(?op, ?x, ?y, _)) {