Add Simple Parsing implementations for basic parsers

src/Parser/Parsing/Impl/ParserInputStream.cpp

@@ -0,0 +1,65 @@
+#include "ParserInputStream.h"
+
+#include <sstream>
+
+ParserInputStream::ParserInputStream(std::istream& stream, std::string fileName)
+    : m_stream(stream),
+      m_file_name(std::move(fileName)),
+      m_line_number(1)
+{
+}
+
+ParserLine ParserInputStream::NextLine()
+{
+    std::ostringstream str;
+    auto hasLength = false;
+
+    auto c = m_stream.get();
+    while (c != EOF)
+    {
+        switch (c)
+        {
+        case '\r':
+            c = m_stream.get();
+            if (c == '\n')
+                return ParserLine(m_file_name, m_line_number++, str.str());
+            str << '\r';
+            hasLength = true;
+            continue;
+
+        case '\n':
+            return ParserLine(m_file_name, m_line_number++, str.str());
+
+        default:
+            str << static_cast<char>(c);
+            hasLength = true;
+            break;
+        }
+
+        c = m_stream.get();
+    }
+
+    if (hasLength)
+        return ParserLine(m_file_name, m_line_number, str.str());
+
+    return ParserLine();
+}
+
+bool ParserInputStream::IncludeFile(const std::string& filename)
+{
+    return false;
+}
+
+void ParserInputStream::PopCurrentFile()
+{
+}
+
+bool ParserInputStream::IsOpen() const
+{
+    return !m_stream.eof();
+}
+
+bool ParserInputStream::Eof() const
+{
+    return !m_stream.eof();
+}

src/Parser/Parsing/Impl/ParserInputStream.h

@@ -0,0 +1,21 @@
+#pragma once
+
+#include <istream>
+
+#include "Parsing/IParserLineStream.h"
+
+class ParserInputStream final : public IParserLineStream
+{
+    std::istream& m_stream;
+    std::string m_file_name;
+    int m_line_number;
+
+public:
+    ParserInputStream(std::istream& stream, std::string fileName);
+
+    ParserLine NextLine() override;
+    bool IncludeFile(const std::string& filename) override;
+    void PopCurrentFile() override;
+    _NODISCARD bool IsOpen() const override;
+    _NODISCARD bool Eof() const override;
+};