[refactoring] Avoid producing empty string/comment categorized edit ranges when renaming init. Also disallow renaming inits with no arguments. #14980
+148
−1
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When renaming an initializer we don't try to pick up argument labels and also don't record the base name location, since you can't actually rename it. This means there are no ranges to rename, but we still return a categorized edit of type string/comment with no location information. This patch changes the category returned to unmatched, rather than string/comment, to indicate they shouldn't be handled.
Also stop showing rename as available on initializers that take no arguments, since nothing can be renamed.
Resolves rdar://problem/37905156.