On Sunday, 3 November 2024 at 19:00:33 UTC, DLearner wrote:
The two fragments below compiled and ran as expected using dmd -betterC under Windows.

```
string Scrn = "OPO NAM='DspVar1' POS='1,1' VAR=('IntVar1','I');E";


   printf("\nWR_Createtest entered.\n");


   OpStructFstPtr = WR_CreateFormatFile(Scrn);

```

```
OpStruct* WR_CreateFormatFile(string parm_Format) {

   import core.stdc.stdio: printf;
   import core.stdc.stdlib: malloc;


   OpStruct* FstOpStructPtr;


   if (parm_Format[0..3] == "OPO"[0..3]) {
      printf("OPO Found.\n");
   } else {
      printf("OPO NOT Found.\n");
   }

   if (parm_Format[$-1..$] == "E"[0..1]) {
      printf("E Found.\n");
   } else {
      printf("E NOT Found.\n");
   }

```

However, the docs say dynamic arrays are not allowed with betterC, and 'string' implies a dynamic array.
So I expected DMD to complain that my code was invalid.

Any ideas?

Id expect this to fail, but nothing I see in yours

```d
string foo="foo";
foo~="bar";
```

[]'s are both slices and dynamic arrays depending on use, theres a debate about that decision(im of the opinion a `[?]` should be a dynamic array and clean up the api), but the current situation will only break on appends

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