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digitalmars.D.bugs - Properties as template value parameters

reply Don Clugston <dac nospam.com.au> writes:
Seems to be an order-of-evaluation bug.
Fails to compile on DMD 0.140, Windows.

--------------
template cat(int n)
{
   const int dog = n;
}

const char [] bird = "canary";

const int sheep = cat!(bird.length).dog;

int main() { return 0; }
--------------
bug.d(9): no property 'length' for type 'char[]'
----------------
Nov 28 2005
next sibling parent reply "John C" <johnch_atms hotmail.com> writes:
"Don Clugston" <dac nospam.com.au> wrote in message 
news:dmef15$1nll$1 digitaldaemon.com...
 Seems to be an order-of-evaluation bug.
 Fails to compile on DMD 0.140, Windows.

 --------------
 template cat(int n)
 {
   const int dog = n;
 }

 const char [] bird = "canary";

 const int sheep = cat!(bird.length).dog;

Works if you cast bird to char[]: const int sheep = cat!((cast(char[])bird).length).dog; printf("%d\n", sheep); // prints '6'
 int main() { return 0; }
 --------------
 bug.d(9): no property 'length' for type 'char[]'
 ---------------- 

Nov 28 2005
parent Don Clugston <dac nospam.com.au> writes:
John C wrote:
 "Don Clugston" <dac nospam.com.au> wrote in message 
 news:dmef15$1nll$1 digitaldaemon.com...
 
Seems to be an order-of-evaluation bug.
Fails to compile on DMD 0.140, Windows.

--------------
template cat(int n)
{
  const int dog = n;
}

const char [] bird = "canary";

const int sheep = cat!(bird.length).dog;

Works if you cast bird to char[]: const int sheep = cat!((cast(char[])bird).length).dog; printf("%d\n", sheep); // prints '6'

Indeed, many minor changes will let it compile, eg const int sheep = cat!((""~ bird).length).dog; and const int pig = bird.length; const int sheep = cat!(pig).dog; (I got sick of a,b,c in bug reports, from now on I'll use animals :-) Of course insects would be more appropriate).
 
 
int main() { return 0; }
--------------
bug.d(9): no property 'length' for type 'char[]'
---------------- 


Nov 28 2005
prev sibling parent Thomas Kuehne <thomas-dloop kuehne.cn> writes:
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Don Clugston schrieb am 2005-11-28:
 Seems to be an order-of-evaluation bug.
 Fails to compile on DMD 0.140, Windows.

 --------------
 template cat(int n)
 {
    const int dog = n;
 }

 const char [] bird = "canary";

 const int sheep = cat!(bird.length).dog;

 int main() { return 0; }
 --------------
 bug.d(9): no property 'length' for type 'char[]'
 ----------------

Added to DStress as http://dstress.kuehne.cn/run/t/template_22.d http://dstress.kuehne.cn/run/t/template_class_15.d http://dstress.kuehne.cn/run/t/template_struct_06.d Thomas -----BEGIN PGP SIGNATURE----- iD8DBQFDk0x83w+/yD4P9tIRAiyeAKDLPIVbZEeUEerdcj1f6yW49yDFxwCeIM2o ajFvNDtVF3EUC0oapTQfZFw= =29a+ -----END PGP SIGNATURE-----
Dec 04 2005