digitalmars.D.learn - Simple code that won't compile
My very simple test code
void main()
{
struct test
{
int a;
}
int b = 1;
test name[b];
}
doesn't compile and gives these errors:
test.d(9): Error: Integer constant expression expected instead of b
test.d(9): Error: Integer constant expression expected instead of
cast(uint)b
test.d(9): Error: Integer constant expression expected instead of
cast(uint)b
test.d(9): Error: Integer constant expression expected instead of
cast(uint)b
What am I doing wrong?
Jul 07 2007
ginophi wrote:
My very simple test code
void main()
{
struct test
{
int a;
}
int b = 1;
test name[b];
}
doesn't compile and gives these errors:
test.d(9): Error: Integer constant expression expected instead of b
test.d(9): Error: Integer constant expression expected instead of
cast(uint)b
test.d(9): Error: Integer constant expression expected instead of
cast(uint)b
test.d(9): Error: Integer constant expression expected instead of
cast(uint)b
What am I doing wrong?
You're not reading the error message: "Integer constant expression expected
instead of b". b isn't constant, hence it doesn't work.
Either make b constant ("const int b = 1"), or use a dynamic array:
auto name = new test[b];
--
Remove ".doesnotlike.spam" from the mail address.
Jul 07 2007
Thanks for the quick reply. But I forgot to put a 'final' in there. Why would it work with 'const int b = 1;' and not 'final int b = 1;' ? "Deewiant" <deewiant.doesnotlike.spam gmail.com> wrote in message news:f6oqhj$rta$1 digitalmars.com...ginophi wrote:expectedMy very simple test code void main() { struct test { int a; } int b = 1; test name[b]; } doesn't compile and gives these errors: test.d(9): Error: Integer constant expression expected instead of b test.d(9): Error: Integer constant expression expected instead of cast(uint)b test.d(9): Error: Integer constant expression expected instead of cast(uint)b test.d(9): Error: Integer constant expression expected instead of cast(uint)b What am I doing wrong?You're not reading the error message: "Integer constant expressioninstead of b". b isn't constant, hence it doesn't work. Either make b constant ("const int b = 1"), or use a dynamic array: auto name = new test[b]; -- Remove ".doesnotlike.spam" from the mail address.
Jul 07 2007
ginophi wrote:Thanks for the quick reply. But I forgot to put a 'final' in there. Why would it work with 'const int b = 1;' and not 'final int b = 1;' ?Because D isn't Java. In D 1.0, which is what you should be using, final only has a meaning regarding classes and inheritance. See "Virtual Functions" at http://www.digitalmars.com/d/1.0/function.html and "Final Classes" at http://www.digitalmars.com/d/1.0/class.html If you care about the beta 2.0, see http://www.digitalmars.com/d/final-const-invariant.html -- Remove ".doesnotlike.spam" from the mail address.
Jul 07 2007
"ginophi" <ginophi fjw3n90v.com> Thanks I'll check that out "Deewiant" <deewiant.doesnotlike.spam gmail.com> wrote in message news:f6orl6$tm2$1 digitalmars.com...ginophi wrote:regardingThanks for the quick reply. But I forgot to put a 'final' in there. Why would it work with 'const int b = 1;' and not 'final int b = 1;' ?Because D isn't Java. In D 1.0, which is what you should be using, final only has a meaningclasses and inheritance. See "Virtual Functions" at http://www.digitalmars.com/d/1.0/function.html and "Final Classes" at http://www.digitalmars.com/d/1.0/class.html If you care about the beta 2.0, see http://www.digitalmars.com/d/final-const-invariant.html -- Remove ".doesnotlike.spam" from the mail address.
Jul 07 2007