• Daniel Yokomiso (51/51) Nov 20 2002 Hi,

"Daniel Yokomiso" <daniel_yokomiso yahoo.com.br> writes:

Hi,

    The DMD compiler (0.50) doesn't complain when I overload a function to
accept both function pointers or delegates, as in:


bit all(char[] array, bit (*predicate)(char)) {
    for (int i = 0; i < array.length; i++) {
        if (!predicate(array[i])) {
            return false;
        }
    }
    return true;
}
bit all(char[] array, bit delegate(char) predicate) {
    for (int i = 0; i < array.length; i++) {
        if (!predicate(array[i])) {
            return false;
        }
    }
    return true;
}
bit isVowel(char c) {
    return (c == 'a') || (c == 'e') || (c == 'i') || (c == 'o') || (c ==
'u');
}
class Character {
    private char letter;
    this(char c) {
        this.letter = c;
    }
    public bit isLetter(char c) {
        return this.letter == c;
    }
}
int main() {
    Character a = new Character('a');
    bit delegate(char) isLetter;
    isLetter = &a.isLetter;

//    printf("%d\r\n", all("aeiouoeieuiei", &isVowel));
    printf("%d\r\n", all("aeiouoeieuiei", isLetter));
    return 0;
}


    But if we uncomment the call to the overloaded all function using a
function pointer, the compiler says that both functions match for the
function pointer parameter. If I have just one version the code doesn't
compile, because it says it can't cast from fp to delegate and vice-versa.
Is it a bug or I'm missing something?

    Best regards,
    Daniel Yokomiso.


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 and also five syllables
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