compiler now compiles some things

src/chunk.c

@@ -1,6 +1,37 @@
+#include <stdio.h>
+#include <stdlib.h>
+
 #include "chunk.h"
+
 #include "vendor/yar.h"
 
+Bc *chunk_new(V) {
+  Bc *chunk = calloc(1, sizeof(Bc));
+  chunk->ref = 1;
+  return chunk;
+}
+
+V chunk_acquire(Bc *chunk) {
+#if CHUNK_DEBUG
+  fprintf(stderr, "DEBUG: acquiring chunk at %p\n", (V *)chunk);
+#endif
+  chunk->ref++;
+}
+V chunk_release(Bc *chunk) {
+#if CHUNK_DEBUG
+  fprintf(stderr, "DEBUG: releasing chunk at %p\n", (V *)chunk);
+#endif
+
+  if (--chunk->ref == 0) {
+#if CHUNK_DEBUG
+    fprintf(stderr, "DEBUG: freeing chunk at %p\n", (V *)chunk);
+#endif
+    yar_free(&chunk->constants);
+    yar_free(chunk);
+    free(chunk);
+  }
+}
+
 V chunk_emit_byte(Bc *chunk, U8 byte) { *yar_append(chunk) = byte; }
 
 V chunk_emit_sleb128(Bc *chunk, I num) {
@@ -22,8 +53,3 @@ I chunk_add_constant(Bc *chunk, O value) {
   *yar_append(&chunk->constants) = value;
   return mark;
 }
-
-V chunk_free(Bc *chunk) {
-  yar_free(&chunk->constants);
-  yar_free(chunk);
-}