… this behavior is deprecated [-Wdeprecated]

```
clang: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated]
```

…onst code_location_t' (aka 'const code_location') without a user-provided default constructor

```
..../var/folders/7d/3dfz8sj91zjdmmzwzz1pw84r0000gp/T/named_references.cpp:1222:22: error: default initialization of an object of const type 'const code_location_t' (aka 'const code_location') without a user-provided default constructor
static const YYLTYPE yyloc_default
                     ^
                                   = {}
1 error generated.
F/var/folders/7d/3dfz8sj91zjdmmzwzz1pw84r0000gp/T/typed_midrule_actions.cpp:1222:22: error: default initialization of an object of const type 'const code_location_t' (aka 'const code_location') without a user-provided default constructor
static const YYLTYPE yyloc_default
                     ^
                                   = {}
1 error generated.
```

```
/var/folders/7d/3dfz8sj91zjdmmzwzz1pw84r0000gp/T/error_recovery.cpp:1437:31: error: expected unqualified-id
                  yy_repairs *new = (yy_repairs *) YYMALLOC (sizeof (yy_repairs));
                              ^
/var/folders/7d/3dfz8sj91zjdmmzwzz1pw84r0000gp/T/error_recovery.cpp:1438:22: error: expected a type
                  new->id = count;
                     ^
/var/folders/7d/3dfz8sj91zjdmmzwzz1pw84r0000gp/T/error_recovery.cpp:1439:22: error: expected a type
                  new->next = 0;
                     ^
/var/folders/7d/3dfz8sj91zjdmmzwzz1pw84r0000gp/T/error_recovery.cpp:1440:22: error: expected a type
                  new->stack_length = stack_length;
                     ^
/var/folders/7d/3dfz8sj91zjdmmzwzz1pw84r0000gp/T/error_recovery.cpp:1441:22: error: expected a type
                  new->states = (yy_state_t *) YYMALLOC (sizeof (yy_state_t) * (stack_length));
                     ^
/var/folders/7d/3dfz8sj91zjdmmzwzz1pw84r0000gp/T/error_recovery.cpp:1442:22: error: expected a type
                  new->state = new->states + (current->state - current->states);
                     ^
/var/folders/7d/3dfz8sj91zjdmmzwzz1pw84r0000gp/T/error_recovery.cpp:1443:30: error: expected a type
                  YYCOPY (new->states, current->states, current->state - current->states + 1);
                             ^
/var/folders/7d/3dfz8sj91zjdmmzwzz1pw84r0000gp/T/error_recovery.cpp:1444:22: error: expected a type
                  new->repair_length = current->repair_length + 1;
                     ^
/var/folders/7d/3dfz8sj91zjdmmzwzz1pw84r0000gp/T/error_recovery.cpp:1445:22: error: expected a type
                  new->prev_repair = current;
                     ^
/var/folders/7d/3dfz8sj91zjdmmzwzz1pw84r0000gp/T/error_recovery.cpp:1446:22: error: expected a type
                  new->repair.type = insert;
                     ^
/var/folders/7d/3dfz8sj91zjdmmzwzz1pw84r0000gp/T/error_recovery.cpp:1447:22: error: expected a type
                  new->repair.term = (yysymbol_kind_t) yyx;
                     ^
/var/folders/7d/3dfz8sj91zjdmmzwzz1pw84r0000gp/T/error_recovery.cpp:1450:48: error: expected a type
                  if (! yy_process_repairs (new, yyx))
                                               ^
/var/folders/7d/3dfz8sj91zjdmmzwzz1pw84r0000gp/T/error_recovery.cpp:1452:34: error: expected a type
                      YYFREE (new);
                                 ^
/var/folders/7d/3dfz8sj91zjdmmzwzz1pw84r0000gp/T/error_recovery.cpp:1457:29: error: expected a type
                  tail = new;
                            ^
/var/folders/7d/3dfz8sj91zjdmmzwzz1pw84r0000gp/T/error_recovery.cpp:1473:40: error: expected a type
                  yy_print_repairs (new);
                                       ^
 ```

```
/var/folders/7d/3dfz8sj91zjdmmzwzz1pw84r0000gp/T/error_recovery.cpp:1196:3: error: expected identifier
  delete,
  ^
 ```

```
/var/folders/7d/3dfz8sj91zjdmmzwzz1pw84r0000gp/T/error_recovery.cpp:1450:25: error: no matching function for call to 'yy_process_repairs'
                  if (! yy_process_repairs (reps, yyx))
                        ^~~~~~~~~~~~~~~~~~
```

…ntype' with an rvalue of type 'int'

```
error: cannot initialize return object of type 'enum yytokentype' with an rvalue of type 'int'
    return 0;
           ^
1 error generated.
```

```
Undefined symbols for architecture arm64:
  "yylex(YYSTYPE*, code_location*)", referenced from:
      yyparse() in named_references-92348a.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
FUndefined symbols for architecture arm64:
  "yylex(YYSTYPE*, code_location*)", referenced from:
      yyparse() in typed_midrule_actions-686229.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
F
```