tree e4c49bd96c61bbf81e81411b80d532f4e8ee7cb8
parent 15e2196aee513e6d133e6dbead18249f1702eeb2
author Brett Wilson <brettw@google.com> 1544820750 -0800
committer CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org> 1545177841 +0000

[debugger] Support setting values.

Adds support for the "=" token.

Tokenization support for equality comparison is added (==) but will
issue an error. This is to prevent surprising error messages if somebody
uses that token today.

This is hooked up to initial support for binary operators. Currently
this is the only supported binary operator but the implementation is
generalized somewhat to support future additions.

The mock ExprNode implementation is separated out from the
expr_node_unittest to a separate file to it can be shared by the
operator unit test.

Adds support for all C++ operator precedence values in expr_parser.cc.
Most are unused and commented out to prevent warnings, but this makes
adding new ones less confusing.

TEST=unit,manual

Change-Id: Ib629a471cf658fd62123871362fd022c8f6d8495