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camc314
8b35abdfd9
The duplicate class element check stored only the last element for each name. This allowed a public element to hide an earlier private declaration, and a setter to hide an earlier getter (or vice versa):
```js
class DuplicateField {
#x;
x;
#x;
}
class DuplicateGetter {
get #x() {}
set #x(value) {}
get #x() {}
}
```
Both classes were accepted despite declaring the same private field or getter twice. The same problem affected setter/getter/setter sequences.
Key a single map by both the element name and whether it is private, so public elements cannot replace private declarations. This keeps the namespaces separate while reserving map capacity only once. For each private name, retain separate slots for setters and other declarations. Look for a previous declaration in the matching slot first, then fall back to the other slot. This catches repeated getters and setters while still allowing one getter/setter pair when both have the same static status.
The existing diagnostic logic continues to reject private names shared by static and instance elements, including the TypeScript-specific diagnostic. Public elements continue through the existing public-element duplicate check.