tree 47a4d982f786415655be60ffd15cd508f7993b96
parent 7a21d8083a8d99ef3aefe227b48e9960789ff710
author Tom Sepez <tsepez@chromium.org> 1597698632 +0000
committer Chromium commit bot <commit-bot@chromium.org> 1597698632 +0000

Introduce fxcrt::AutoNuller<T>.

Similar to fxcrt::AutoRestorer<T>, but always reverts to nullptr
regardless of the initial value. Useful for when we can't store a
|T| oldvalue on the stack, or if |T| isn't copy-constructable, or if
we don't require the location to be pre-initialized to a legitimate
value.

Remove CPDF_StreamParserAutoClearer in favor of this.

Change-Id: I0258a5dc1c62b86f75d5c95a4915b3990e0c61ff
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/72832
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>