Don't discard Arrow's Status results.

Fixes #3.

src/CMakeLists.txt

@@ -17,6 +17,7 @@ target_link_libraries(TouchParquet
                       arrow_shared
                       parquet_shared
                       range-v3)
+target_compile_options(TouchParquet PRIVATE -Werror=unused-result)
 
 add_library(CircuitParquet STATIC ${CIRCUIT_SRCS})
 target_include_directories(CircuitParquet PUBLIC
@@ -29,6 +30,7 @@ target_link_libraries(CircuitParquet
                       nlohmann_json::nlohmann_json
                       HighFive
                       range-v3)
+target_compile_options(CircuitParquet PRIVATE -Werror=unused-result)
 
 add_executable(touch2parquet touch2parquet.cpp)
 target_link_libraries(touch2parquet

src/circuit/parquet_reader.cpp

@@ -49,7 +49,10 @@ void CircuitReaderParquet::init_data_reader() {
         reader_ = parquet::ParquetFileReader::OpenFile(filename_, false);
     }
     // NOTE that reader is unique. We must give it up to the other reader
-    parquet::arrow::FileReader::Make(arrow::default_memory_pool(), std::move(reader_), &data_reader_);
+    const auto status = parquet::arrow::FileReader::Make(arrow::default_memory_pool(), std::move(reader_), &data_reader_);
+    if (!status.ok()) {
+        throw std::runtime_error(status.ToString());
+    }
     cur_row_group_ = 0;
 }
 
@@ -66,7 +69,10 @@ uint32_t CircuitReaderParquet::fillBuffer(CircuitData* buf, uint32_t length) {
         return 0;
     }
 
-    data_reader_->ReadRowGroup(cur_row_group_++, &(buf->row_group));
+    const auto status = data_reader_->ReadRowGroup(cur_row_group_++, &(buf->row_group));
+    if (!status.ok()) {
+        throw std::runtime_error(status.ToString());
+    }
     return (uint32_t) buf->row_group->num_rows();
 }
 

src/touches/parquet_writer.cpp

@@ -138,7 +138,10 @@ TouchWriterParquet::~TouchWriterParquet() {
         _writeBuffer(_buffer_offset);
     }
     file_writer->Close();
-    out_file->Close();
+    const auto status = out_file->Close();
+    if (!status.ok()) {
+        std::clog << status.ToString() << std::endl;
+    }
 }