Add a CMakeLists file.

CMakeLists.txt

@@ -0,0 +1,6 @@
+cmake_minimum_required(VERSION 3.0)
+project(lily)
+
+set(CMAKE_CXX_STANDARD 14)
+add_executable(lily src/main.cpp src/parser.cpp src/parser.c)
+target_include_directories(lily PUBLIC src)

src/parser.cpp

@@ -3,6 +3,7 @@ extern "C" {
 }
 #include "parser.hpp"
 #include "pattern.hpp"
+#include <memory>
 
 namespace lily {
     std::string tree_str(pgs_tree* tree, const char* source) {