r174576 - Simplify FindExternalVisibleDeclsByName by making it return a bool indicating

[Richard Smith]

On Wed, Feb 6, 2013 at 8:41 PM, Sean Silva <silvas at purdue.edu> wrote:

>    /// \brief Finds all the visible declarations with a given name.
>    /// The current implementation of this method just loads the entire
>    /// lookup table as unmaterialized references.
> -  virtual DeclContext::lookup_result
> +  virtual bool
>
> Bool return arguments probably deserve a mention in the comment, due to
> their notorious ambiguity.
>

This is an overload of a virtual function; the return value is described in
the base class. Do we have a policy on how to document virtual overrides?
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