tree 2dafcc3d6bceac402a55c47810dc34eaff3d04c9
parent 4efeafc5acf1c12fc49f0f3052eff1271875f1f4
author Daniel Hosseinian <dhoss@chromium.org> 1582790747 +0000
committer Chromium commit bot <commit-bot@chromium.org> 1582790747 +0000

Create abstract class CXFA_FMChainableExpression

Create the abstract class CXFA_FMChainableExpression, which is derived
from CXFA_FMSimpleExpression, as a base class for expression classes
that chain two CXFA_FMSimpleExpression objects.

This change sets up another change that would allow for space-efficient
destruction of chainable expressions.

Bug: chromium:1052724
Change-Id: I47d015e4c458611261a95920b2dbd3d6b163bcfa
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/67090
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Daniel Hosseinian <dhoss@chromium.org>