XOY-Leveldb

作者：谢瑞阳 10225101483 徐翔宇 10225101535

costan 201f77d137 Inline defaults in options. This CL moves default values for leveldb::{Options,ReadOptions,WriteOptions} from constructors to member declarations, and removes now-redundant comments stating the defaults. ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=239271242		pirms 6 gadiem
..
c.h	Expose WriteBatch::Append in the C API.	pirms 6 gadiem
cache.h	Replace NULL with nullptr in C++ files.	pirms 7 gadiem
comparator.h	Add LEVELDB_EXPORT macro to export public symbols.	pirms 7 gadiem
db.h	Replace NULL with nullptr in C++ files.	pirms 7 gadiem
dumpfile.h	Add LEVELDB_EXPORT macro to export public symbols.	pirms 7 gadiem
env.h	Added native support for Windows.	pirms 6 gadiem
export.h	Add CMake build support.	pirms 7 gadiem
filter_policy.h	leveldb: Require C++11.	pirms 7 gadiem
iterator.h	Clean up Iterator.	pirms 7 gadiem
options.h	Inline defaults in options.	pirms 6 gadiem
slice.h	leveldb: Require C++11.	pirms 7 gadiem
status.h	Add move constructor to Status.	pirms 7 gadiem
table.h	Replace NULL with nullptr in C++ files.	pirms 7 gadiem
table_builder.h	leveldb: Require C++11.	pirms 7 gadiem
write_batch.h	leveldb: Make WriteBatch::ApproximateSize() const.	pirms 6 gadiem