C++ extractor improvements (#1803)

* #include an absolute path didn't work - because paths were taken to always be relative.

* Split of NodeTree.
Split out FileUtil.
Split out MacroWriter.

* Rename slang-cpp-extractor-main.cpp -> cpp-extractor-main.cpp

* First pass at extractor unit-tests

* Initial parsing of enum.

* Ability to disable/enable parsing of scope types.

* Initial support for typedef.

* Added operator== != to ArrayVIew.
Added test for splitting to unit tests.

* Improve comment in StringUtil.

* Fix comment.

* Fix typo.

1 files changed, 25 insertions, 0 deletions

diff --git a/tools/slang-cpp-extractor/file-util.h b/tools/slang-cpp-extractor/file-util.h
new file mode 100644
index 000000000..01aafeedf
--- /dev/null
+++ b/tools/slang-cpp-extractor/file-util.h
@@ -0,0 +1,25 @@
+#ifndef CPP_EXTRACT_FILE_UTIL_H
+#define CPP_EXTRACT_FILE_UTIL_H
+
+#include "diagnostics.h"
+
+namespace CppExtract {
+using namespace Slang;
+
+// A macro to define a single indent as a string
+#define CPP_EXTRACT_INDENT_STRING "    "
+
+struct FileUtil
+{
+        /// Read text into outRead. Any failures written to sink (can be passed as nullptr, for no output)
+    static SlangResult readAllText(const Slang::String& fileName, DiagnosticSink* sink, String& outRead);
+        /// Write text to filename. Any failures written to sink. (can be passed as nullptr, for no output)
+    static SlangResult writeAllText(const Slang::String& fileName, DiagnosticSink* sink, const UnownedStringSlice& text);
+
+        /// Appends CPP_EXTRACT_INDENT_STRING indentCount number of times to out
+    static void indent(Index indentCount, StringBuilder& out);
+};
+
+} // CppExtract
+
+#endif