Refactor: breakout function definition to cpp file

src/wavetable.cpp

@@ -0,0 +1,8 @@
+#include "wavetable.h"
+
+std::string Wavetable::name() {
+  std::string id_str = std::to_string(m_id);
+  id_str.append(": ");
+  id_str.append(m_name);
+  return id_str;
+}

src/wavetable.h

@@ -9,18 +9,13 @@
 
 /* Table of single cycle wave lookup tables */
 class Wavetable {
-private:
+ private:
   uint16_t m_id{};                             // Unique ID number of wavetable
   std::string m_name{};                        // String name of wavetable
   std::array<Wave, DEFAULT_N_SAMPLES> m_table; // table data
 
 public:
-  std::string name() {
-    std::string id_str = std::to_string(m_id);
-    id_str.append(": ");
-    id_str.append(m_name);
-    return id_str;
-  }
+  std::string name();
 
   void set_table(std::array<Wave, DEFAULT_N_SAMPLES> table) { m_table = table; }
 };