[THRIFT-1270] thrift: add --allow-neg-keys argument to allow

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.8
• Component/s: C++ - Library
• Assignee: Dave Watson
• Reporter: Dave Watson
• Created: 17/Aug/11 19:59
• Updated: 17/Aug/11 23:46
• Resolved: 17/Aug/11 23:17

Description

From 0df0b8cec89a9d7652fbbabd06e5b4d153537431 Mon Sep 17 00:00:00 2001
From: Dave Watson <[e-mail]>
Date: Tue, 2 Aug 2011 08:40:44 -0700
Subject: [PATCH 02/33] thrift: add --allow-neg-keys argument to allow
negative field keys

Summary:
Several of our .thrift files already deployed in production do not have
explicitly specified key values for all fields. Thrift automatically
chooses negative values for these keys (and also emits a warning while
doing so). Previously, this couldn't be fixed without breaking protocol
compatibility, since thrift refuses to accept explicitly specified
negative key values.

This new flag causes thrift to accept negative key values, so that these
older .thrift files can be updated with explicitly specified values. It
emits a warning if a negative value is specified that is different from
what thrift would have otherwise chosen.

Test Plan:
Tested modifying common/fbunit/logger/if/UnitTestLogger.thrift
and biggrep/BigGrep.thrift to pass in negative field values.

I'll check in the changes to these .thrift files separately, since it
also requires changes to fbconfig to support passing in the
--allow-neg-keys argument. For fbunit, I'll probably change it to just
use positive key values, since we don't really care about backwards
compatibility in that case.

—
compiler/cpp/src/globals.h | 15 +++++++++++++
compiler/cpp/src/main.cc | 10 ++++++++
compiler/cpp/src/parse/t_field.h | 9 ++++++++
compiler/cpp/src/thrifty.yy | 43 +++++++++++++++++++++++++++++++------
4 files changed, 70 insertions, 7 deletions