Oh, now it makes sense! Thanks a lot! I will learn and use dstep in...

Your type definition is wrong:
```D
struct toml_datum_t {
  int ok;
  union u {
    toml...

    Your type definition is wrong:
    ```D
    struct toml_datum_t {
      int ok;
      union u {
        toml...

...I'm getting the following error message:

```
main.d(51): Error: need `this` for `s...

...to compile, the error message is the following:

```
toml.c(638): Error: assignment cannot be...

...But I think instead of "fixing" that error message it simply needs to be thrown...

...wrote:

That's just the thing. That error message is, plain and simple, handwaving. Unless...

...for no other reason than this handwaving error message). And as for isInputRange - I haven...

...it. The error message I'm getting is the following:

```
toml.c(39): Error: cannot...

...Fix 22472 - Correct error message for invalid `void` return

  The old error message (`return expression...