Extract commonly used Parser code to new Parser component

src/Parser/Parsing/Impl/CommentRemovingStreamProxy.cpp

@@ -0,0 +1,79 @@
+#include "CommentRemovingStreamProxy.h"
+
+CommentRemovingStreamProxy::CommentRemovingStreamProxy(IParserLineStream* stream)
+    : m_stream(stream),
+      m_inside_multi_line_comment(false),
+      m_next_line_is_comment(false)
+{
+}
+
+ParserLine CommentRemovingStreamProxy::NextLine()
+{
+    auto line = m_stream->NextLine();
+
+    if (m_next_line_is_comment)
+    {
+        m_next_line_is_comment = !line.m_line.empty() && line.m_line[line.m_line.size() - 1] == '\\';
+        return ParserLine(line.m_filename, line.m_line_number, std::string());
+    }
+
+    unsigned multiLineCommentStart = 0;
+    for (auto i = 0u; i < line.m_line.size(); i++)
+    {
+        const auto c = line.m_line[i];
+
+        if (m_inside_multi_line_comment)
+        {
+            if (c == '*' && i + 1 < line.m_line.size() && line.m_line[i + 1] == '/')
+            {
+                line.m_line.erase(multiLineCommentStart, i + 2 - multiLineCommentStart);
+                multiLineCommentStart = 0;
+                m_inside_multi_line_comment = false;
+            }
+        }
+        else
+        {
+            if(c == '/' && i + 1 < line.m_line.size())
+            {
+                const auto c1 = line.m_line[i + 1];
+
+                if (c1 == '*')
+                {
+                    multiLineCommentStart = i;
+                    m_inside_multi_line_comment = true;
+                }
+                else if(c1 == '/')
+                {
+                    m_next_line_is_comment = line.m_line[line.m_line.size() - 1] == '\\';
+                    line.m_line.erase(i);
+                    return line;
+                }
+            }
+        }
+    }
+
+    if(m_inside_multi_line_comment)
+        line.m_line.erase(multiLineCommentStart);
+
+    return line;
+}
+
+bool CommentRemovingStreamProxy::IncludeFile(const std::string& filename)
+{
+    return m_stream->IncludeFile(filename);
+}
+
+void CommentRemovingStreamProxy::PopCurrentFile()
+{
+    m_stream->PopCurrentFile();
+}
+
+bool CommentRemovingStreamProxy::IsOpen() const
+{
+    return m_stream->IsOpen();
+}
+
+bool CommentRemovingStreamProxy::Eof() const
+{
+    return m_stream->Eof();
+}