Revert "convert ReaderWriterEnum to scoped enum"

It causes breakage on some gcc's with "default constructor could be not
generated" message.
Will attempt to re-land later.

This reverts commit 6da5ed6d.

sw/inc/iodetect.hxx

@@ -58,21 +58,21 @@ struct SwIoDetect
     }
 };
 
-enum class ReaderWriterType {
-    Rtf,
-    Bas,
-    Ww6,
-    Ww8,
-    RtfWh,
-    Html,
-    Ww5,
-    Xml,
-    TextDlg,
-    Text,
-    LAST = Text
+enum ReaderWriterEnum {
+    READER_WRITER_RTF,
+    READER_WRITER_BAS,
+    READER_WRITER_WW6,
+    READER_WRITER_WW8,
+    READER_WRITER_RTF_WH,
+    READER_WRITER_HTML,
+    READER_WRITER_WW5,
+    READER_WRITER_XML,
+    READER_WRITER_TEXT_DLG,
+    READER_WRITER_TEXT,
+    MAXFILTER
 };
 
-SwIoDetect& GetSwIoDetect(ReaderWriterType);
+extern SwIoDetect aFilterDetect[];
 
 /** The following class is a wrapper for basic i/o functions of Writer 3.0.
  Everything is static. All filter names mentioned are Writer-internal

sw/source/filter/basflt/fltini.cxx

@@ -57,8 +57,6 @@
 #include <com/sun/star/beans/XPropertySet.hpp>
 #include <com/sun/star/util/XMacroExpander.hpp>
 #include <rtl/bootstrap.hxx>
-#include <o3tl/enumarray.hxx>
-#include <o3tl/enumrange.hxx>
 
 using namespace utl;
 using namespace com::sun::star::uno;
@@ -70,8 +68,8 @@ Reader* GetRTFReader();
 Reader* GetWW8Reader();
 
 // Note: if editing, please don't forget to modify also the enum
-// ReaderWriterType and aFilterDetect in iodetect.cxx
-o3tl::enumarray<ReaderWriterType, SwReaderWriterEntry> aReaderWriter =
+// ReaderWriterEnum and aFilterDetect in shellio.hxx
+SwReaderWriterEntry aReaderWriter[] =
 {
     SwReaderWriterEntry( &::GetRTFReader, &::GetRTFWriter,  true  ),
     SwReaderWriterEntry( nullptr,               &::GetASCWriter,  false ),
@@ -110,16 +108,20 @@ SwRead SwGetReaderXML() // SW_DLLPUBLIC
         return ReadXML;
 }
 
+inline void SetFltPtr( sal_uInt16 rPos, SwRead pReader )
+{
+        aReaderWriter[ rPos ].pReader = pReader;
+}
 
 namespace sw {
 
 Filters::Filters()
 {
-    aReaderWriter[ ReaderWriterType::Bas ].pReader =  ReadAscii = new AsciiReader;
-    aReaderWriter[ ReaderWriterType::Html ].pReader = ReadHTML = new HTMLReader;
-    aReaderWriter[ ReaderWriterType::Xml ].pReader =  ReadXML = new XMLReader;
-    aReaderWriter[ ReaderWriterType::TextDlg ].pReader = ReadAscii;
-    aReaderWriter[ ReaderWriterType::Text ].pReader = ReadAscii;
+    SetFltPtr( READER_WRITER_BAS, (ReadAscii = new AsciiReader) );
+    SetFltPtr( READER_WRITER_HTML, (ReadHTML = new HTMLReader) );
+    SetFltPtr( READER_WRITER_XML, (ReadXML = new XMLReader)  );
+    SetFltPtr( READER_WRITER_TEXT_DLG, ReadAscii );
+    SetFltPtr( READER_WRITER_TEXT, ReadAscii );
 }
 
 Filters::~Filters()
@@ -159,15 +161,15 @@ namespace SwReaderWriter {
 
 Reader* GetRtfReader()
 {
-    return aReaderWriter[ReaderWriterType::Rtf].GetReader();
+    return aReaderWriter[READER_WRITER_RTF].GetReader();
 }
 
 void GetWriter( const OUString& rFltName, const OUString& rBaseURL, WriterRef& xRet )
 {
-    for( ReaderWriterType aType : o3tl::enumrange<ReaderWriterType>() )
-        if ( GetSwIoDetect(aType).IsFilter( rFltName ) )
+    for( int n = 0; n < MAXFILTER; ++n )
+        if ( aFilterDetect[n].IsFilter( rFltName ) )
         {
-            aReaderWriter[aType].GetWriter( rFltName, rBaseURL, xRet );
+            aReaderWriter[n].GetWriter( rFltName, rBaseURL, xRet );
             break;
         }
 }
@@ -175,9 +177,9 @@ void GetWriter( const OUString& rFltName, const OUString& rBaseURL, WriterRef& x
 SwRead GetReader( const OUString& rFltName )
 {
     SwRead pRead = nullptr;
-    for( ReaderWriterType n : o3tl::enumrange<ReaderWriterType>() )
+    for( int n = 0; n < MAXFILTER; ++n )
     {
-        if ( GetSwIoDetect(n).IsFilter( rFltName ) )
+        if ( aFilterDetect[n].IsFilter( rFltName ) )
         {
             pRead = aReaderWriter[n].GetReader();
             // add special treatment for some readers

sw/source/filter/basflt/iodetect.cxx

@@ -24,7 +24,6 @@
 #include <svtools/parhtml.hxx>
 #include <tools/urlobj.hxx>
 #include <unotools/moduleoptions.hxx>
-#include <o3tl/enumarray.hxx>
 
 
 using namespace ::com::sun::star;
@@ -34,7 +33,7 @@ static bool IsDocShellRegistered()
     return SvtModuleOptions().IsWriter();
 }
 
-o3tl::enumarray<ReaderWriterType, SwIoDetect> aFilterDetect =
+SwIoDetect aFilterDetect[] =
 {
     SwIoDetect( FILTER_RTF ),
     SwIoDetect( FILTER_BAS ),
@@ -48,11 +47,6 @@ o3tl::enumarray<ReaderWriterType, SwIoDetect> aFilterDetect =
     SwIoDetect( FILTER_TEXT )
 };
 
-SwIoDetect& GetSwIoDetect(ReaderWriterType eType)
-{
-    return aFilterDetect[eType];
-}
-
 const OUString SwIoSystem::GetSubStorageName( const SfxFilter& rFltr )
 {
     // for StorageFilters also set the SubStorageName