• DLearner (43/43) Apr 20 Consider:
• DLearner (38/41) Apr 20 The same situation seems to occur with:
• DLearner (6/12) Apr 21 [...]

DLearner <bmqazwsx123 gmail.com> writes:

Consider:

```
#include <stdio.h>
void ccallee2(void)
{
    printf("ccallee2: Entered (written in C).");
    printf("\n");

    printf("ccallee2: Exiting...");
    printf("\n");

    return;
}

```

called by:

```
// Calling C subfn via FP
// dmd -betterC cmst2.c ccallee2.c


#include <stdio.h>

extern void ccallee2(void);

void main(void)
{

    void* wkPtr;

    typedef void (*ccallee2typPtr)(void);


    printf("main: Entered (Written in C).");
    printf("\n");

    printf("main: About to call ccallee2 via FP...");
    printf("\n");

    wkPtr = &ccallee2;

    (*((ccallee2typPtr)wkPtr))();
//   *((ccallee2typPtr)wkPtr)();
//   *((ccallee2typPtr)(wkPtr))();


    printf("main: Returned from ccallee2.");
    printf("\n");

    printf("main: Exiting...\n");
    return;
}


```

As written, compiles and runs correctly.
But either of the two commented-out alternatives produce:
```
Error: can only `*` a pointer, not a `void`

```

To me, there is no 'void' as the void* ptr has been expressly 
cast to a proper pointer type.

DLearner <bmqazwsx123 gmail.com> writes:

On Monday, 20 April 2026 at 16:04:32 UTC, DLearner wrote:
 Consider:

[...]
 To me, there is no 'void' as the void* ptr has been expressly 
 cast to a proper pointer type.

The same situation seems to occur with:

```
#include <stdio.h>
void ccallee3(void)
{
    printf("ccallee3: Entered (written in C).");
    printf("\n");

    printf("ccallee3: Exiting...");
    printf("\n");

    return;
}
```

called by

```
// Calling C subfn via FP
// dmd -betterC cmst3.c ccallee3.c

#include <stdio.h>

extern void ccallee3(void);

void main(void)
{
    typedef void (*ccallee3typPtr)(void);
    ccallee3typPtr wkPtr;


    printf("main: Entered (written in C).");
    printf("\n");

    printf("main: About to call ccallee3 via FP...");
    printf("\n");

    wkPtr = &ccallee3;

    (*(wkPtr))();
//   *(wkPtr)();

    printf("main: Returned from ccallee3.");
    printf("\n");

    printf("main: Exiting...\n");
    return;
}


```

Which is slightly simpler.

DLearner <bmqazwsx123 gmail.com> writes:

On Monday, 20 April 2026 at 17:13:26 UTC, DLearner wrote:
 On Monday, 20 April 2026 at 16:04:32 UTC, DLearner wrote:
 Consider:

 [...]
 To me, there is no 'void' as the void* ptr has been expressly 
 cast to a proper pointer type.


[...]
 The same situation seems to occur with:

[...]

There is no problem (apart from my misunderstanding C's parsing 
rules).

Sorry for the noise.