Improvements for markdown parsing.

src/compiler/Lexer.h

@@ -0,0 +1,11 @@
+#pragma once
+
+#include <string>
+#include <vector>
+
+class Lexer
+{
+public:
+    // e.g. Pattern [@](@) returns <source, tag> for input: [source](tag) and delimiter @
+    static bool matchPattern(const std::string& pattern, const std::string& checkString, char delimiter, std::vector<std::string>& hitSequence);
+};