b64ead5cb8
Sometimes, a request for definitions will return multiple of the same
definition. This can happen in at least the cases of
- two-way bindings (one of the same definition for the property and
event binding)
- multiple template binding expressions in the same attribute
- something like "*ngFor="let i of items; trackBy: test" has two
template bindings, resulting in two template binding ASTs at the
same location (the attribute span). The language service then parses
both of these bindings individually, resulting in two independent
but identical definitions. For more context, see https://github.com/angular/angular/pull/34847#discussion_r371006680.
This commit prunes duplicate definitions by signing definitions with
their location, and checking if that location signature has been seen in
a previous definition returned to the client.
PR Close #34995
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