Base: Add C++ iostate methods to Writer class

src/Base/Writer.cpp

@@ -92,6 +92,31 @@ Writer::Writer()
 
 Writer::~Writer() = default;
 
+void Writer::clear()
+{
+    Stream().clear();
+}
+
+bool Writer::isGood() const
+{
+    return Stream().good();
+}
+
+bool Writer::hasFailed() const
+{
+    return Stream().fail();
+}
+
+bool Writer::isBad() const
+{
+    return Stream().bad();
+}
+
+bool Writer::isEof() const
+{
+    return Stream().eof();
+}
+
 std::ostream& Writer::beginCharStream(CharStreamFormat format)
 {
     if (CharStream) {

src/Base/Writer.h

@@ -136,7 +136,22 @@ public:
     void decInd();
     //@}
 
+    /** @name C++ streams */
+    //@{
+    /// get the current indentation
     virtual std::ostream& Stream() = 0;
+    virtual const std::ostream& Stream() const = 0;
+    /// Set error state flags
+    void clear();
+    /// Check whether state of stream is good
+    bool isGood() const;
+    /// Check whether either failbit or badbit is set
+    bool hasFailed() const;
+    /// Check whether badbit is set
+    bool isBad() const;
+    /// Check whether eofbit is set
+    bool isEof() const;
+    //@}
 
     /** Create an output stream for storing character content
      * The input is assumed to be valid character with
@@ -215,6 +230,11 @@ public:
         return ZipStream;
     }
 
+    const std::ostream& Stream() const override
+    {
+        return ZipStream;
+    }
+
     void setComment(const char* str)
     {
         ZipStream.setComment(str);
@@ -248,6 +268,10 @@ public:
     {
         return StrStream;
     }
+    const std::ostream& Stream() const override
+    {
+        return StrStream;
+    }
     std::string getString() const
     {
         return StrStream.str();
@@ -277,6 +301,10 @@ public:
     {
         return FileStream;
     }
+    const std::ostream& Stream() const override
+    {
+        return FileStream;
+    }
     void close()
     {
         FileStream.close();