• bearophile (15/15) Mar 11 2010 While trying to create a safe int, I have found a problem, this is reduc...
• Ellery Newcomer (2/17) Mar 11 2010 define opCall in Foo
• bearophile (5/6) Mar 11 2010 Thank you :-)
• =?ISO-8859-1?Q?Pelle_M=E5nsson?= (7/22) Mar 11 2010 I think you want a constructor.

bearophile <bearophileHUGS lycos.com> writes:

While trying to create a safe int, I have found a problem, this is reduced code:

struct Foo {
    int x;
    static Foo opAssign(int value) { return Foo(value); }
}
void main() {
    Foo y = 0;
}


The compiler prints:
test.d(6): Error: cannot implicitly convert expression (0) of type int to Foo

While this generates no error:
Foo y; y = 0; is OK.

Do you know if there is a way to do that?

Bye and thank you,
bearophile

Ellery Newcomer <ellery-newcomer utulsa.edu> writes:

On 03/11/2010 11:22 AM, bearophile wrote:
 While trying to create a safe int, I have found a problem, this is reduced
code:

 struct Foo {
      int x;
      static Foo opAssign(int value) { return Foo(value); }
 }
 void main() {
      Foo y = 0;
 }


 The compiler prints:
 test.d(6): Error: cannot implicitly convert expression (0) of type int to Foo

 While this generates no error:
 Foo y; y = 0; is OK.

 Do you know if there is a way to do that?

 Bye and thank you,
 bearophile

define opCall in Foo

bearophile <bearophileHUGS lycos.com> writes:

Ellery Newcomer:
 define opCall in Foo

Thank you :-)
I need to practice more with operator overload.

Bye,
bearophile

=?ISO-8859-1?Q?Pelle_M=E5nsson?= <pelle.mansson gmail.com> writes:

On 03/11/2010 06:22 PM, bearophile wrote:
 While trying to create a safe int, I have found a problem, this is reduced
code:

 struct Foo {
      int x;
      static Foo opAssign(int value) { return Foo(value); }
 }
 void main() {
      Foo y = 0;
 }


 The compiler prints:
 test.d(6): Error: cannot implicitly convert expression (0) of type int to Foo

 While this generates no error:
 Foo y; y = 0; is OK.

 Do you know if there is a way to do that?

 Bye and thank you,
 bearophile

I think you want a constructor.

struct Foo {
     int x;
     static Foo opAssign(int value) { return Foo(value); }
     this(int i) {x = i;}
}