• tired_eyes (12/12) May 03 2015 Feels pretty silly, but I can't compile this:
• Dennis Ritchie (5/17) May 03 2015 void main() {
• tired_eyes (11/35) May 03 2015 Not so simple, unfortunately.
• Dennis Ritchie (15/51) May 03 2015 I think it is a bug:
• tired_eyes (3/3) May 03 2015 Hmmm.
• biozic (24/69) May 03 2015 No. The aboc code defines a field of Mystruct calld 'id', with a
• tired_eyes (1/16) May 03 2015 This make sense, thant you for the explanation.

"tired_eyes" <pastuhov85 gmail.com> writes:

Feels pretty silly, but I can't compile this:


import std.random;
auto i = uniform(0, 10);


DMD spits this:

/usr/include/dmd/phobos/std/random.d(1188): Error: static 
variable initialized cannot be read at compile time
/usr/include/dmd/phobos/std/random.d(1231):        called from 
here: rndGen()
/usr/include/dmd/phobos/std/random.d(1231):        called from 
here: uniform(a, b, rndGen())


Perhaps I'm missing something obvious?
dmd 2.067.1, openSUSE 13.2 x64

"Dennis Ritchie" <dennis.ritchie mail.ru> writes:

On Sunday, 3 May 2015 at 08:42:57 UTC, tired_eyes wrote:
 Feels pretty silly, but I can't compile this:


 import std.random;
 auto i = uniform(0, 10);


 DMD spits this:

 /usr/include/dmd/phobos/std/random.d(1188): Error: static 
 variable initialized cannot be read at compile time
 /usr/include/dmd/phobos/std/random.d(1231):        called from 
 here: rndGen()
 /usr/include/dmd/phobos/std/random.d(1231):        called from 
 here: uniform(a, b, rndGen())


 Perhaps I'm missing something obvious?
 dmd 2.067.1, openSUSE 13.2 x64

void main() {
	import std.random;
	auto i = uniform(0, 10);
}

"tired_eyes" <pastuhov85 gmail.com> writes:

On Sunday, 3 May 2015 at 08:48:52 UTC, Dennis Ritchie wrote:
 On Sunday, 3 May 2015 at 08:42:57 UTC, tired_eyes wrote:
 Feels pretty silly, but I can't compile this:


 import std.random;
 auto i = uniform(0, 10);


 DMD spits this:

 /usr/include/dmd/phobos/std/random.d(1188): Error: static 
 variable initialized cannot be read at compile time
 /usr/include/dmd/phobos/std/random.d(1231):        called from 
 here: rndGen()
 /usr/include/dmd/phobos/std/random.d(1231):        called from 
 here: uniform(a, b, rndGen())


 Perhaps I'm missing something obvious?
 dmd 2.067.1, openSUSE 13.2 x64

 void main() {
 	import std.random;
 	auto i = uniform(0, 10);
 }

Not so simple, unfortunately.
Actual code:


import std.random;

struct Mystruct {
     auto id = uniform(0, 10);
}

void main() {
     // wahtever
}


..and no luck.

"Dennis Ritchie" <dennis.ritchie mail.ru> writes:

On Sunday, 3 May 2015 at 09:04:07 UTC, tired_eyes wrote:
 On Sunday, 3 May 2015 at 08:48:52 UTC, Dennis Ritchie wrote:
 On Sunday, 3 May 2015 at 08:42:57 UTC, tired_eyes wrote:
 Feels pretty silly, but I can't compile this:


 import std.random;
 auto i = uniform(0, 10);


 DMD spits this:

 /usr/include/dmd/phobos/std/random.d(1188): Error: static 
 variable initialized cannot be read at compile time
 /usr/include/dmd/phobos/std/random.d(1231):        called 
 from here: rndGen()
 /usr/include/dmd/phobos/std/random.d(1231):        called 
 from here: uniform(a, b, rndGen())


 Perhaps I'm missing something obvious?
 dmd 2.067.1, openSUSE 13.2 x64

 void main() {
 	import std.random;
 	auto i = uniform(0, 10);
 }

 Not so simple, unfortunately.
 Actual code:


 import std.random;

 struct Mystruct {
     auto id = uniform(0, 10);
 }

 void main() {
     // wahtever
 }


 ..and no luck.

I think it is a bug:

import std.stdio, std.random;

struct Mystruct {
	//mixin(`auto id = uniform(0, 10);`);
	// Error: static variable initialized cannot be read at compile 
time
	int val;
}

void main() {

	Mystruct test;

	test.val = uniform(0, 10); // OK
	writeln(test.val);

	mixin(`auto n = uniform(0, 10);`); // OK
}

"tired_eyes" <pastuhov85 gmail.com> writes:

Hmmm.

hap.random from http://code.dlang.org/packages/hap behaves 
exactly the same.

"biozic" <dransic gmail.com> writes:

On Sunday, 3 May 2015 at 09:28:40 UTC, Dennis Ritchie wrote:
 On Sunday, 3 May 2015 at 09:04:07 UTC, tired_eyes wrote:
 On Sunday, 3 May 2015 at 08:48:52 UTC, Dennis Ritchie wrote:
 On Sunday, 3 May 2015 at 08:42:57 UTC, tired_eyes wrote:
 Feels pretty silly, but I can't compile this:


 import std.random;
 auto i = uniform(0, 10);


 DMD spits this:

 /usr/include/dmd/phobos/std/random.d(1188): Error: static 
 variable initialized cannot be read at compile time
 /usr/include/dmd/phobos/std/random.d(1231):        called 
 from here: rndGen()
 /usr/include/dmd/phobos/std/random.d(1231):        called 
 from here: uniform(a, b, rndGen())


 Perhaps I'm missing something obvious?
 dmd 2.067.1, openSUSE 13.2 x64

 void main() {
 	import std.random;
 	auto i = uniform(0, 10);
 }

 Not so simple, unfortunately.
 Actual code:


 import std.random;

 struct Mystruct {
    auto id = uniform(0, 10);
 }

 void main() {
    // wahtever
 }


 ..and no luck.

 I think it is a bug:

No. The aboc code defines a field of Mystruct calld 'id', with a 
type inferred from the static initializer expression 'uniform(0, 
10)'. The problem is that a static initializer is... static! So 
the expression must be evaluated at compile-time. The uniform 
generator from std.random cannot be used at compile-time, thus 
the error.

You could do:
---
import std.random;

struct Mystruct {
	int id;
	
	static opCall() {
		Mystruct s;
		s.id = uniform(0, 10);
		return s;
	}
}

void main() {
     auto s = Mystruct();
	// whatever
}
---

"tired_eyes" <pastuhov85 gmail.com> writes:

 import std.random;

 struct Mystruct {
 	int id;
 	
 	static opCall() {
 		Mystruct s;
 		s.id = uniform(0, 10);
 		return s;
 	}
 }

 void main() {
     auto s = Mystruct();
 	// whatever
 }
 ---

This make sense, thant you for the explanation.