void pointer duck typing

ccodegen.cpp

@@ -680,10 +680,13 @@ parse_all_modules(){
 function Ast_Module *
 add_module(Intern_String filename){
   For(pctx->modules){
-    if(it->name == filename)
+    if(it->name == filename){
+      log_info("Returning registered module: %Q\n", filename);
       return it;
+    }
   }
 
+  log_info("Adding module: %Q\n", filename);
   Ast_Module *result = ast_module(filename);
   register_ast_file(result->name, result, true);
   pctx->modules.add(result);
@@ -722,7 +725,7 @@ begin_compilation(){
 global F64 generating_time_begin;
 global F64 generating_time_end;
 function String
-end_compilation(){
+get_compilation_result(){
   generating_time_begin = os_time();
 
 #if 1
@@ -806,7 +809,11 @@ typedef struct String{
   }
 
   String string_result = string_flatten(pctx->perm, &pctx->gen);
-  exp_destroy(pctx->heap);
   generating_time_end = os_time();
   return string_result;
 }
+
+function void
+compiler_cleanup(){
+  exp_destroy(pctx->heap);
+}