• d-bugmail puremagic.com (33/33) Apr 21 2022 https://issues.dlang.org/show_bug.cgi?id=23045

d-bugmail puremagic.com writes:

https://issues.dlang.org/show_bug.cgi?id=23045

          Issue ID: 23045
           Summary: importC: casted function type is missing extern(C)
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Keywords: ImportC, wrong-code
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody puremagic.com
          Reporter: duser neet.fi
                CC: duser neet.fi

int printf(char *, ...);
void other(int a, int b)
{ 
        printf("a=%d b=%d\n", a, b);
}
int main()
{
        // called like extern(D)
        ((void (*)(int, int))other)(1, 2);

        // Error: incompatible types for `(cast(void function(int, int))&
other) is (other)`: `void function(int, int)` and `extern (C) void(int a, int
b)`
        if (((void (*)(int, int))other) == other)
                {}
}

on 64-bit linux, the call prints "a=2 b=1" since arguments to extern(D)
functions are passed in reverse order

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