ui/logic/data: show parse errors in CodeView

This change saves the errors while parsing in the Storage and displays them in the CodeView. The error messages can be
read in the tooltip on hovering. The error count is visible in the status bar.

src/lib/data/Storage.h

@@ -27,7 +27,11 @@ public:
 	void logGraph() const;
 	void logLocations() const;
 
+	size_t getErrorCount() const;
+
 	// ParserClient implementation
+	virtual void onError(const ParseLocation& location, const std::string& message);
+
 	virtual Id onTypedefParsed(
 		const ParseLocation& location, const std::vector<std::string>& nameHierarchy,
 		const ParseTypeUsage& underlyingType, AccessType access);
@@ -108,6 +112,8 @@ public:
 		const std::string& filePath, uint firstLineNumber, uint lastLineNumber
 	) const;
 
+	virtual TokenLocationCollection getErrorTokenLocations(std::vector<std::string>* errorMessages) const;
+
 protected:
 	const Graph& getGraph() const;
 	const TokenLocationCollection& getTokenLocationCollection() const;
@@ -137,6 +143,9 @@ private:
 
 	SearchIndex m_tokenIndex;
 	SearchIndex m_filterIndex;
+
+	TokenLocationCollection m_errorLocationCollection;
+	std::vector<std::string> m_errorMessages;
 };
 
 #endif // STORAGE_H