• Pierre Rouleau (24/24) Nov 18 2006 With DMD 0.179:
• Jarrett Billingsley (20/24) Nov 18 2006 Void functions are allowed to have return statements with a return value...

Pierre Rouleau <prouleau impathnetworks.com> writes:

With DMD 0.179:

- A void main with no return statement returns 0, a decent choice.
- A void main with a return statement is accepted without warning or 
compiler error. Is this a bug?



// ------------------
void
main()
{
    return 1;   // returns 1 to the OS
}

// --------BAD--------
void
main()
{
    return 1.0;  // returns 33 to the OS
}

// --------BAD--------
void
main()
{
    return "0123456789";  // returns 48 to the OS
}

--

P.R.

"Jarrett Billingsley" <kb3ctd2 yahoo.com> writes:

"Pierre Rouleau" <prouleau impathnetworks.com> wrote in message 
news:ejnhne$2c0r$1 digitaldaemon.com...
 With DMD 0.179:

 - A void main with no return statement returns 0, a decent choice.
 - A void main with a return statement is accepted without warning or 
 compiler error. Is this a bug?

Void functions are allowed to have return statements with a return value 
expression, and main is no exception.  I think it's to remove some special 
case stuff regarding templated functions.  The expression is evaluated but 
its value is discarded.  Example:

int foo()
{
 writefln("foo");
 return 0;
}

void bar()
{
 return foo();
}

void main()
{
 bar();
}

prints "foo".