data: parse variable usage

* Implemented functions for parsing usages of fields and global variables in ASTBodyVisitor and ASTVisitor.
* Storage adds TokenLocatons and Edges for usages.
* Added tests for parsing usage of fields and global variables.

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src/lib/data/parser/ParserClient.h

@@ -74,6 +74,10 @@ public:
 		const ParseLocation& location, const std::string& fullName, const std::string& baseName, AccessType access) = 0;
 	virtual void onCallParsed(
 		const ParseLocation& location, const std::string& callerName, const std::string& calleeName) = 0;
+	virtual void onFieldUsageParsed(
+		const ParseLocation& location, const std::string& userName, const std::string& usedName) = 0;
+	virtual void onGlobalVariableUsageParsed(
+		const ParseLocation& location, const std::string& userName, const std::string& usedName) = 0;
 };
 
 #endif // PARSER_CLIENT_H

src/lib/data/parser/cxx/ASTBodyVisitor.cpp

@@ -39,3 +39,21 @@ void ASTBodyVisitor::VisitCXXConstructExpr(clang::CXXConstructExpr* expr)
 
 	VisitStmt(expr);
 }
+
+void ASTBodyVisitor::VisitMemberExpr(clang::make_ptr<clang::MemberExpr>::type expr)
+{
+	if (expr->getMemberDecl()->getKind() == clang::Decl::Kind::Field)
+	{
+		m_client->VisitFieldUsageExprInDeclBody(m_parentDecl, expr);
+	}
+	VisitStmt(expr);
+}
+
+void ASTBodyVisitor::VisitDeclRefExpr(clang::make_ptr<clang::DeclRefExpr>::type expr)
+{
+	if (expr->getDecl()->getKind() == clang::Decl::Var && expr->getDecl()->isDefinedOutsideFunctionOrMethod())
+	{
+		m_client->VisitGlobalVariableUsageExprInDeclBody(m_parentDecl, expr);
+	}
+	VisitStmt(expr);
+}

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

@@ -14,6 +14,8 @@ public:
 	void VisitChildren(clang::Stmt* stmt);
 	void VisitCallExpr(clang::CallExpr* expr);
 	void VisitCXXConstructExpr(clang::CXXConstructExpr* expr);
+	void VisitMemberExpr(clang::make_ptr<clang::MemberExpr>::type expr);
+	void VisitDeclRefExpr(clang::make_ptr<clang::DeclRefExpr>::type expr);
 
 private:
 	ASTBodyVisitorClient* m_client;

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

@@ -13,6 +13,8 @@ public:
 
 	virtual void VisitCallExprInDeclBody(clang::NamedDecl* decl, clang::CallExpr* expr) = 0;
 	virtual void VisitCXXConstructExprInDeclBody(clang::NamedDecl* decl, clang::CXXConstructExpr* expr) = 0;
+	virtual void VisitFieldUsageExprInDeclBody(clang::NamedDecl* decl, clang::MemberExpr* expr) = 0;
+	virtual void VisitGlobalVariableUsageExprInDeclBody(clang::NamedDecl* decl, clang::DeclRefExpr* expr) = 0;
 };
 
 #endif // AST_BODY_VISITOR_CLIENT_H

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

@@ -278,6 +278,50 @@ void ASTVisitor::VisitCXXConstructExprInDeclBody(clang::NamedDecl* decl, clang::
 	);
 }
 
+void ASTVisitor::VisitFieldUsageExprInDeclBody(clang::NamedDecl* decl, clang::MemberExpr* expr)
+{
+	const clang::SourceManager& sourceManager = m_context->getSourceManager();
+	const clang::PresumedLoc& presumedBegin = sourceManager.getPresumedLoc(expr->getSourceRange().getBegin());
+	const clang::PresumedLoc& presumedEnd = sourceManager.getPresumedLoc(expr->getSourceRange().getEnd());
+	const std::string exprName = expr->getMemberNameInfo().getAsString();
+
+	ParseLocation parseLocation(
+		presumedBegin.getFilename(),
+		presumedBegin.getLine(),
+		presumedBegin.getColumn(),
+		presumedEnd.getLine(),
+		presumedEnd.getColumn() + exprName.size() - 1
+	);
+
+	m_client->onFieldUsageParsed(
+		parseLocation,
+		decl->getQualifiedNameAsString(),
+		expr->getMemberDecl()->getQualifiedNameAsString()
+	);
+}
+
+void ASTVisitor::VisitGlobalVariableUsageExprInDeclBody(clang::NamedDecl* decl, clang::DeclRefExpr* expr)
+{
+	const clang::SourceManager& sourceManager = m_context->getSourceManager();
+	const clang::PresumedLoc& presumedBegin = sourceManager.getPresumedLoc(expr->getSourceRange().getBegin());
+	const clang::PresumedLoc& presumedEnd = sourceManager.getPresumedLoc(expr->getSourceRange().getEnd());
+	const std::string exprName = expr->getNameInfo().getAsString();
+
+	ParseLocation parseLocation(
+		presumedBegin.getFilename(),
+		presumedBegin.getLine(),
+		presumedBegin.getColumn(),
+		presumedEnd.getLine(),
+		presumedEnd.getColumn() + exprName.size() - 1
+	);
+
+	m_client->onGlobalVariableUsageParsed(
+		parseLocation,
+		decl->getQualifiedNameAsString(),
+		expr->getDecl()->getQualifiedNameAsString()
+	);
+}
+
 bool ASTVisitor::hasValidLocation(const clang::Decl* declaration) const
 {
 	const clang::SourceLocation& location = declaration->getLocStart();

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

@@ -41,6 +41,8 @@ public:
 	// ASTBodyVisitorClient implementation
 	virtual void VisitCallExprInDeclBody(clang::NamedDecl* decl, clang::CallExpr* expr); // calls
 	virtual void VisitCXXConstructExprInDeclBody(clang::NamedDecl* decl, clang::CXXConstructExpr* expr); // constructor calls
+	virtual void VisitFieldUsageExprInDeclBody(clang::NamedDecl* decl, clang::MemberExpr* expr); // field usages
+	virtual void VisitGlobalVariableUsageExprInDeclBody(clang::NamedDecl* decl, clang::DeclRefExpr* expr); // global variable usage
 
 private:
 	bool hasValidLocation(const clang::Decl* declaration) const;