• Koroskin Denis (4/4) Aug 06 2008 Write a one-line compile-time function (or template) that returns a
• BCS (6/12) Aug 06 2008 template it(T)
• Wyverex (2/19) Aug 06 2008 Tried something like this, but mine and yours gives integer overflow...
• Wyverex (7/26) Aug 06 2008 template crazy( T )
• Frank Benoit (3/32) Aug 06 2008 template func( T ) { T func = mixin( "0x555555555555555555555555"[0 ..
• Koroskin Denis (5/34) Aug 07 2008 No-no-no. It should work for integer type of *any* length (byte, short, ...
• Frank Benoit (3/40) Aug 07 2008 right.
• Koroskin Denis (4/45) Aug 07 2008 Doesn't work for signed types :P
• Frank Benoit (2/7) Aug 07 2008 template func( T ) { T func = T.min < 0 ? T.max/3*2+1 : T.max/3; }
• BCS (3/5) Aug 08 2008 Gaaahhh!!! My eyes

"Koroskin Denis" <2korden gmail.com> writes:

Write a one-line compile-time function (or template) that returns a  
number, which can be written in binary as 010101010...010101. Exactly the  
same code should work for byte, short, int, long, cent etc.

No loops or recursion allowed. Use nothing but brain! :)

BCS <ao pathlink.com> writes:

Reply to Koroskin,

 Write a one-line compile-time function (or template) that returns a
 number, which can be written in binary as 010101010...010101. Exactly
 the  same code should work for byte, short, int, long, cent etc.
 
 No loops or recursion allowed. Use nothing but brain! :)
 

template it(T)
{
T it = 0x5555_5555_5555_5555_5555_5555_5555_5555_5555_5555_5555_5555
5555_5555_5555_5555 
& (t.max | t.min);
}

Wyverex <wyverex.cypher gmail.com> writes:

BCS wrote:
 Reply to Koroskin,
 
 Write a one-line compile-time function (or template) that returns a
 number, which can be written in binary as 010101010...010101. Exactly
 the  same code should work for byte, short, int, long, cent etc.

 No loops or recursion allowed. Use nothing but brain! :)

 
 template it(T)
 {
 T it = 
 0x5555_5555_5555_5555_5555_5555_5555_5555_5555_5555_5555_5555
5555_5555_5555_5555 
 & (t.max | t.min);
 }
 
 

Tried something like this, but mine and yours gives integer overflow...

Wyverex <wyverex.cypher gmail.com> writes:

Wyverex wrote:
 BCS wrote:
 Reply to Koroskin,

 Write a one-line compile-time function (or template) that returns a
 number, which can be written in binary as 010101010...010101. Exactly
 the  same code should work for byte, short, int, long, cent etc.

 No loops or recursion allowed. Use nothing but brain! :)

 template it(T)
 {
 T it = 
 0x5555_5555_5555_5555_5555_5555_5555_5555_5555_5555_5555_5555
5555_5555_5555_5555 
 & (t.max | t.min);
 }

 Tried something like this, but mine and yours gives integer overflow...


template crazy( T )
{
   T crazy =  0xAAAA_AAAA_AAAA_AAAA;
}

as long as the hex string is less then ulong.max ...  or ucent.max when 
that gets implemented...

Frank Benoit <keinfarbton googlemail.com> writes:

Wyverex schrieb:
 Wyverex wrote:
 BCS wrote:
 Reply to Koroskin,

 Write a one-line compile-time function (or template) that returns a
 number, which can be written in binary as 010101010...010101. Exactly
 the  same code should work for byte, short, int, long, cent etc.

 No loops or recursion allowed. Use nothing but brain! :)

 template it(T)
 {
 T it = 
 0x5555_5555_5555_5555_5555_5555_5555_5555_5555_5555_5555_5555
5555_5555_5555_5555 
 & (t.max | t.min);
 }

 Tried something like this, but mine and yours gives integer overflow...

 
 
 template crazy( T )
 {
   T crazy =  0xAAAA_AAAA_AAAA_AAAA;
 }
 
 as long as the hex string is less then ulong.max ...  or ucent.max when 
 that gets implemented...

template func( T ) { T func = mixin( "0x555555555555555555555555"[0 .. 
T.sizeof*2+2] ); }

"Koroskin Denis" <2korden gmail.com> writes:

On Thu, 07 Aug 2008 05:59:30 +0400, Frank Benoit  
<keinfarbton googlemail.com> wrote:

 Wyverex schrieb:
 Wyverex wrote:
 BCS wrote:
 Reply to Koroskin,

 Write a one-line compile-time function (or template) that returns a
 number, which can be written in binary as 010101010...010101. Exactly
 the  same code should work for byte, short, int, long, cent etc.

 No loops or recursion allowed. Use nothing but brain! :)

 template it(T)
 {
 T it =  
 0x5555_5555_5555_5555_5555_5555_5555_5555_5555_5555_5555_5555
5555_5555_5555_5555  
 & (t.max | t.min);
 }

 Tried something like this, but mine and yours gives integer overflow...

   template crazy( T )
 {
   T crazy =  0xAAAA_AAAA_AAAA_AAAA;
 }
  as long as the hex string is less then ulong.max ...  or ucent.max  
 when that gets implemented...

 template func( T ) { T func = mixin( "0x555555555555555555555555"[0 ..  
 T.sizeof*2+2] ); }

No-no-no. It should work for integer type of *any* length (byte, short,  
long, cent and any future type).
And there is a *much* simpler solution!

Frank Benoit <keinfarbton googlemail.com> writes:

Koroskin Denis schrieb:
 On Thu, 07 Aug 2008 05:59:30 +0400, Frank Benoit 
 <keinfarbton googlemail.com> wrote:
 
 Wyverex schrieb:
 Wyverex wrote:
 BCS wrote:
 Reply to Koroskin,

 Write a one-line compile-time function (or template) that returns a
 number, which can be written in binary as 010101010...010101. Exactly
 the  same code should work for byte, short, int, long, cent etc.

 No loops or recursion allowed. Use nothing but brain! :)

 template it(T)
 {
 T it = 
 0x5555_5555_5555_5555_5555_5555_5555_5555_5555_5555_5555_5555
5555_5555_5555_5555 
 & (t.max | t.min);
 }

 Tried something like this, but mine and yours gives integer overflow...

   template crazy( T )
 {
   T crazy =  0xAAAA_AAAA_AAAA_AAAA;
 }
  as long as the hex string is less then ulong.max ...  or ucent.max 
 when that gets implemented...

 template func( T ) { T func = mixin( "0x555555555555555555555555"[0 .. 
 T.sizeof*2+2] ); }

 
 No-no-no. It should work for integer type of *any* length (byte, short, 
 long, cent and any future type).
 And there is a *much* simpler solution!

right.
template func( T ) { T func = T.max/3; }

"Koroskin Denis" <2korden gmail.com> writes:

On Thu, 07 Aug 2008 18:11:27 +0400, Frank Benoit  
<keinfarbton googlemail.com> wrote:

 Koroskin Denis schrieb:
 On Thu, 07 Aug 2008 05:59:30 +0400, Frank Benoit  
 <keinfarbton googlemail.com> wrote:

 Wyverex schrieb:
 Wyverex wrote:
 BCS wrote:
 Reply to Koroskin,

 Write a one-line compile-time function (or template) that returns a
 number, which can be written in binary as 010101010...010101.  
 Exactly
 the  same code should work for byte, short, int, long, cent etc.

 No loops or recursion allowed. Use nothing but brain! :)

 template it(T)
 {
 T it =  
 0x5555_5555_5555_5555_5555_5555_5555_5555_5555_5555_5555_5555
5555_5555_5555_5555  
 & (t.max | t.min);
 }

 Tried something like this, but mine and yours gives integer  
 overflow...

   template crazy( T )
 {
   T crazy =  0xAAAA_AAAA_AAAA_AAAA;
 }
  as long as the hex string is less then ulong.max ...  or ucent.max  
 when that gets implemented...

 template func( T ) { T func = mixin( "0x555555555555555555555555"[0 ..  
 T.sizeof*2+2] ); }

  No-no-no. It should work for integer type of *any* length (byte,  
 short, long, cent and any future type).
 And there is a *much* simpler solution!

 right.
 template func( T ) { T func = T.max/3; }

Doesn't work for signed types :P
But you are close!

Frank Benoit <keinfarbton googlemail.com> writes:

Koroskin Denis schrieb:

 right.
 template func( T ) { T func = T.max/3; }

 
 Doesn't work for signed types :P
 But you are close!

template func( T ) { T func = T.min < 0 ? T.max/3*2+1 : T.max/3; }

BCS <ao pathlink.com> writes:

Reply to Frank,

 func( T ) { T func = mixin( "0x555555555555555555555555"[0 .. T.sizeof*2+2] 

); }
 


Gaaahhh!!! My eyes <G>