Add DWARFFormValue::getAsBlockData(), getAsBlockSize() and getAsFlag().

[David Blaikie]

What's the need for the getAsFlag function?

Perhaps the getAsBlockData/getAsBlockSize could be one function, returning
an Optional<ArrayRef<uint8_t*>> ? ("getAsBlock"?)


On Wed, Sep 3, 2014 at 11:47 AM, Frédéric Riss <friss at apple.com> wrote:

> These new accessors will be used in subsequent patches.
>
> OK to commit?
>
>
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