data: ClangTool gets invoked for cpp files only, headers are parsed on-the-fly

This change adds the class FileRegister, that splits cpp and h files for the Parser and keeps track which headers have
been parsed yet. TranslationUnits get only created for cpp files now, and headers are parsed on the fly. This reduces
parse time by around half.

src/lib/data/parser/cxx/ASTVisitor.h

@@ -4,16 +4,17 @@
 #include "clang/AST/ASTContext.h"
 #include "clang/AST/RecursiveASTVisitor.h"
 
+#include "utility/file/FileRegister.h"
+
 #include "data/parser/cxx/ASTBodyVisitorClient.h"
 #include "data/parser/ParserClient.h"
-#include "utility/file/FileManager.h"
 
 class ASTVisitor
 	: public clang::RecursiveASTVisitor<ASTVisitor>
 	, public ASTBodyVisitorClient
 {
 public:
-	ASTVisitor(clang::ASTContext* context, ParserClient* client, FileManager* fileManager);
+	ASTVisitor(clang::ASTContext* context, ParserClient* client, FileRegister* fileRegister);
 	virtual ~ASTVisitor();
 
 	// Left for debugging purposes. Uncomment to see a colored ast-dump of the parsed file.
@@ -57,8 +58,9 @@ public:
 	virtual void VisitVarDeclInDeclBody(clang::FunctionDecl* decl, clang::VarDecl* varDecl); // type usages
 
 private:
-	bool isLocatedInMainFile(const clang::Decl* declaration) const;
-	bool isLocatedInSourceFile(const clang::Decl* declaration) const;
+	bool isLocatedInUnparsedProjectFile(const clang::Decl* declaration) const;
+	bool isLocatedInProjectFile(const clang::Decl* declaration) const;
+
 	ParserClient::AccessType convertAccessType(clang::AccessSpecifier) const;
 
 	ParseLocation getParseLocation(const clang::SourceRange& sourceRange) const;
@@ -77,7 +79,7 @@ private:
 
 	clang::ASTContext* m_context;
 	ParserClient* m_client;
-	FileManager* m_fileManager;
+	FileRegister* m_fileRegister;
 };
 
 #endif // AST_VISITOR_H