Organize source into compiler and runtime dirs

src/compiler/rules/symbol.cpp

@@ -0,0 +1,26 @@
+#include "symbol.h"
+#include "blank.h"
+#include "transition_map.h"
+
+namespace tree_sitter  {
+    namespace rules {
+        Symbol::Symbol(const std::string &name) : name(name) {};
+
+        sym_ptr sym(const std::string &name) {
+            return std::make_shared<Symbol>(name);
+        }
+
+        TransitionMap<Rule> Symbol::transitions() const {
+            return TransitionMap<Rule>({{ sym(name) , blank() }});
+        }
+        
+        bool Symbol::operator==(const Rule &rule) const {
+            const Symbol *other = dynamic_cast<const Symbol *>(&rule);
+            return other && (other->name == name);
+        }
+        
+        std::string Symbol::to_string() const {
+            return std::string("(sym '") + name + "')";
+        }
+    }
+}