[PARQUET-1323] [C++] Fix compiler warnings with clang-6.0

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: cpp-1.5.0
• Component/s: parquet-cpp
• Labels: pull-request-available
• Assignee: Wes McKinney
• Reporter: Wes McKinney
• Created: 11/Jun/18 20:46
• Updated: 24/Jul/18 01:14
• Resolved: 24/Jul/18 01:14

Description

Observed when building today

[1/23] Running thrift compiler on parquet.thrift
[WARNING:/home/wesm/code/parquet-cpp/src/parquet/parquet.thrift:295] The "byte" type is a compatibility alias for "i8". Use "i8" to emphasize the signedness of this type.

[15/23] Building CXX object CMakeFiles/parquet_objlib.dir/src/parquet/schema.cc.o
In file included from ../src/parquet/schema.cc:18:
../src/parquet/schema.h:376:27: warning: private field 'schema_descr_' is not used [-Wunused-private-field]
  const SchemaDescriptor* schema_descr_;
                          ^
1 warning generated.
[20/23] Building CXX object CMakeFiles/parquet_objlib.dir/src/parquet/metadata.cc.o
../src/parquet/metadata.cc:84:10: warning: comparison of two values with different enumeration types in switch statement ('Type::type' and 'parquet::Type::type') [-Wenum-compare-switch]
    case Type::FIXED_LEN_BYTE_ARRAY:
         ^~~~~~~~~~~~~~~~~~~~~~~~~~
../src/parquet/metadata.cc:82:10: warning: comparison of two values with different enumeration types in switch statement ('Type::type' and 'parquet::Type::type') [-Wenum-compare-switch]
    case Type::BYTE_ARRAY:
         ^~~~~~~~~~~~~~~~
../src/parquet/metadata.cc:80:10: warning: comparison of two values with different enumeration types in switch statement ('Type::type' and 'parquet::Type::type') [-Wenum-compare-switch]
    case Type::FLOAT:
         ^~~~~~~~~~~
../src/parquet/metadata.cc:78:10: warning: comparison of two values with different enumeration types in switch statement ('Type::type' and 'parquet::Type::type') [-Wenum-compare-switch]
    case Type::DOUBLE:
         ^~~~~~~~~~~~
../src/parquet/metadata.cc:76:10: warning: comparison of two values with different enumeration types in switch statement ('Type::type' and 'parquet::Type::type') [-Wenum-compare-switch]
    case Type::INT96:
         ^~~~~~~~~~~
../src/parquet/metadata.cc:74:10: warning: comparison of two values with different enumeration types in switch statement ('Type::type' and 'parquet::Type::type') [-Wenum-compare-switch]
    case Type::INT64:
         ^~~~~~~~~~~
../src/parquet/metadata.cc:72:10: warning: comparison of two values with different enumeration types in switch statement ('Type::type' and 'parquet::Type::type') [-Wenum-compare-switch]
    case Type::INT32:
         ^~~~~~~~~~~
../src/parquet/metadata.cc:70:10: warning: comparison of two values with different enumeration types in switch statement ('Type::type' and 'parquet::Type::type') [-Wenum-compare-switch]
    case Type::BOOLEAN:
         ^~~~~~~~~~~~~
8 warnings generated.
[23/23] Creating library symlink debug/libparquet.so.1 debug/libparquet.so

Issue Links

• links to: GitHub Pull Request #478