/**
* Remove symbol from this scope. Used when an inner class attribute tells us that the class isn't
* a package member.
*/
public void remove(Symbol sym) {
assert shared == 0;
Entry e = lookup(sym.name);
while (e.scope == this && e.sym != sym) e = e.next();
if (e.scope == null) return;
// remove e from table and shadowed list;
Entry te = table[sym.name.index & hashMask];
if (te == e) table[sym.name.index & hashMask] = e.shadowed;
else
while (true) {
if (te.shadowed == e) {
te.shadowed = e.shadowed;
break;
}
te = te.shadowed;
}
// remove e from elems and sibling list
te = elems;
if (te == e) elems = e.sibling;
else
while (true) {
if (te.sibling == e) {
te.sibling = e.sibling;
break;
}
te = te.sibling;
}
}
/** Copy the given entry and all entries shadowed by it to table */
private void copy(Entry e) {
if (e.sym != null) {
copy(e.shadowed);
int hash = e.sym.name.index & hashMask;
e.shadowed = table[hash];
table[hash] = e;
}
}
/** Enter symbol sym in this scope if not already there.不存在的时候再放，这个enter就相当于hashmap的put */
public void enterIfAbsent(Symbol sym) {
assert shared == 0;
Entry e = lookup(sym.name);
while (e.scope == this && e.sym.kind != sym.kind) e = e.next();
if (e.scope != this) enter(sym);
}