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Allow implicit cast between dynamic array and queue for all expressions 

Dynamic arrays and queues can be implicitly cast between each other. At the
moment this only works if the right hand side is a signal or assignment
pattern.

But this should be possible for other r-value expression that returns a
queue or dynamic array type. E.g. function calls or class properties.

Since the expr_type() method is defined for all NetExpr objects we can use
that and do not have to cast to NetESignal.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
This commit is contained in:
Lars-Peter Clausen 2022-04-15 18:23:41 +02:00
parent bcae0304a3
commit c853025305
1 changed files with 7 additions and 6 deletions
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13
netmisc.cc
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@ -985,16 +985,17 @@ NetExpr* elab_and_eval(Design*des, NetScope*scope, PExpr*pe,
if (tmp == 0) return 0;
ivl_variable_type_t cast_type = ivl_type_base(lv_net_type);
if ((cast_type != IVL_VT_NO_TYPE) && (cast_type != tmp->expr_type())) {
ivl_variable_type_t expr_type = tmp->expr_type();
if ((cast_type != IVL_VT_NO_TYPE) && (cast_type != expr_type)) {
// Catch some special cases.
switch (cast_type) {
case IVL_VT_DARRAY:
case IVL_VT_QUEUE:
if (NetESignal*net = dynamic_cast<NetESignal*>(tmp)) {
ivl_variable_type_t type = net->expr_type();
if ((type == IVL_VT_DARRAY) || (type == IVL_VT_QUEUE))
return tmp;
}
if ((expr_type == IVL_VT_DARRAY) || (expr_type == IVL_VT_QUEUE))
return tmp;
// This is needed to handle the special case of `'{}` which
// gets elaborated to NetENull.
if (dynamic_cast<PEAssignPattern*>(pe))
return tmp;
// fall through