digitalmars.D.learn - Weird error when compiling.

Agustin (30/30) Oct 19 2013 I'm getting Assertion failure: 'thisval && thisval->op ==

Agustin (40/70) Oct 19 2013 Sorry i clicked the post button :(. The full code is:

TheFlyingFiddle (10/15) Oct 19 2013 typeid(T).toHash can not be evaluated by the compiler at

Agustin (3/18) Oct 19 2013 Anyway to evaluate the name of the class and return its hash at

TheFlyingFiddle (15/17) Oct 19 2013 I couldn't find the built in hash unction for strings so i used

Agustin (12/29) Oct 20 2013 Works perfectly :), now if i want to implement the same but

Agustin (10/44) Oct 20 2013 I came up with something like

Agustin (10/58) Oct 20 2013 And the final template is

bearophile (40/41) Oct 20 2013 I don't see your error with the following code, please give the

Agustin (8/55) Oct 20 2013 TOKclassreference' on line 4067 in file 'interpret.c' when

bearophile (5/11) Oct 21 2013 Thank you. I presume this bug is already fixed in the latest

"Agustin" <agustin.l.alvarez hotmail.com> writes:

I'm getting Assertion failure: 'thisval && thisval->op == 
TOKclassreference' on line 4067 in file 'interpret.c' when 
compiling this.

public class Component {
     ////////////////////////////////////////////////////////////
     /// Component's unique id.
     private hash_t id;
     ....
     ////////////////////////////////////////////////////////////
     /// \brief Default constructor.
     ///
     /// \param[in] id   The id of the component
     ////////////////////////////////////////////////////////////
     public this(hash_t id) {
         this.id = id;
         this.active = true;
         this.validated = true;
     }


}

public class ComponentDetail(T) : Component {
     ////////////////////////////////////////////////////////////
     /// Component's ID as static member.
     public static hash_t ID = typeid(T).toHash;

     ////////////////////////////////////////////////////////////
     /// \brief Default constructor.
     ////////////////////////////////////////////////////////////
     public this() {
         super(ID);
     }
}

Oct 19 2013

"Agustin" <agustin.l.alvarez hotmail.com> writes:

On Sunday, 20 October 2013 at 01:41:58 UTC, Agustin wrote:
 I'm getting Assertion failure: 'thisval && thisval->op == 
 TOKclassreference' on line 4067 in file 'interpret.c' when 
 compiling this.

 public class Component {
     ////////////////////////////////////////////////////////////
     /// Component's unique id.
     private hash_t id;
     ....
     ////////////////////////////////////////////////////////////
     /// \brief Default constructor.
     ///
     /// \param[in] id   The id of the component
     ////////////////////////////////////////////////////////////
     public this(hash_t id) {
         this.id = id;
         this.active = true;
         this.validated = true;
     }


 }

 public class ComponentDetail(T) : Component {
     ////////////////////////////////////////////////////////////
     /// Component's ID as static member.
     public static hash_t ID = typeid(T).toHash;

     ////////////////////////////////////////////////////////////
     /// \brief Default constructor.
     ////////////////////////////////////////////////////////////
     public this() {
         super(ID);
     }
 }

Sorry i clicked the post button :(. The full code is:

I'm getting Assertion failure: 'thisval && thisval->op ==
TOKclassreference' on line 4067 in file 'interpret.c' when
compiling this.

public class Component {
       ////////////////////////////////////////////////////////////
       /// Component's unique id.
       private hash_t id;
       ....
       ////////////////////////////////////////////////////////////
       /// \brief Default constructor.
       ///
       /// \param[in] id   The id of the component
       ////////////////////////////////////////////////////////////
       public this(hash_t id) {
           this.id = id;
           this.active = true;
           this.validated = true;
       }

       ....
}

public class ComponentDetail(T) : Component {
       ////////////////////////////////////////////////////////////
       /// Component's ID as static member.
       public static hash_t ID = typeid(T).toHash;

       ////////////////////////////////////////////////////////////
       /// \brief Default constructor.
       ////////////////////////////////////////////////////////////
       public this() {
           super(ID);
       }
}

private class InputComponent : ComponentDetail!InputComponent {
}

void main() {
       auto pComponent = new InputComponent();

       writeln(pComponent.getId());
       writeln(InputComponent.ID);
}

Oct 19 2013

"TheFlyingFiddle" <theflyingfiddle gmail.com> writes:

 public class ComponentDetail(T) : Component {
       
 ////////////////////////////////////////////////////////////
       /// Component's ID as static member.
       public static hash_t ID = typeid(T).toHash;

typeid(T).toHash can not be evaluated by the compiler at 
compile-time.

Placing the ID initalization in a static this should fix the 
problem.

eg.

public static hash_t ID;

static this()
{
   ID = typeid(T).toHash;
}

Oct 19 2013

"Agustin" <agustin.l.alvarez hotmail.com> writes:

On Sunday, 20 October 2013 at 01:56:39 UTC, TheFlyingFiddle wrote:
 public class ComponentDetail(T) : Component {
      
 ////////////////////////////////////////////////////////////
      /// Component's ID as static member.
      public static hash_t ID = typeid(T).toHash;

 typeid(T).toHash can not be evaluated by the compiler at 
 compile-time.

 Placing the ID initalization in a static this should fix the 
 problem.

 eg.

 public static hash_t ID;

 static this()
 {
   ID = typeid(T).toHash;
 }

Anyway to evaluate the name of the class and return its hash at 
compile time?

Oct 19 2013

"TheFlyingFiddle" <theflyingfiddle gmail.com> writes:

 Anyway to evaluate the name of the class and return its hash at 
 compile time?

I couldn't find the built in hash unction for strings so i used 
the one from http://dlang.org/hash-map.html as an example. More 
advanced and better hash functions can be found online.

public class ComponentDetail(T) : Component {
	////////////////////////////////////////////////////////////
	/// Component's ID as static member.
	public static hash_t ID = hash!(T);
}

hash_t hash(T)()
{
     hash_t hash;
     foreach (char c; T.stringof)
         hash = (hash * 9) + c;
     return hash;
}

Oct 19 2013

"Agustin" <agustin.l.alvarez hotmail.com> writes:

On Sunday, 20 October 2013 at 02:14:55 UTC, TheFlyingFiddle wrote:
 Anyway to evaluate the name of the class and return its hash 
 at compile time?

 I couldn't find the built in hash unction for strings so i used 
 the one from http://dlang.org/hash-map.html as an example. More 
 advanced and better hash functions can be found online.

 public class ComponentDetail(T) : Component {
 	////////////////////////////////////////////////////////////
 	/// Component's ID as static member.
 	public static hash_t ID = hash!(T);
 }

 hash_t hash(T)()
 {
     hash_t hash;
     foreach (char c; T.stringof)
         hash = (hash * 9) + c;
     return hash;
 }

Works perfectly :), now if i want to implement the same but
rather do something like

template GetHash(string character, hash_t hash = 0, size_t index
= 0) {
	static if (character[index])
		enum GetHash = GetHash(character, hash = (hash * 9) +
character[index], ++index);
	else
		enum GetHash = hash;
}

How should i implement it?

Oct 20 2013

"Agustin" <agustin.l.alvarez hotmail.com> writes:

On Sunday, 20 October 2013 at 21:54:37 UTC, Agustin wrote:
 On Sunday, 20 October 2013 at 02:14:55 UTC, TheFlyingFiddle 
 wrote:
 Anyway to evaluate the name of the class and return its hash 
 at compile time?

 I couldn't find the built in hash unction for strings so i 
 used the one from http://dlang.org/hash-map.html as an 
 example. More advanced and better hash functions can be found 
 online.

 public class ComponentDetail(T) : Component {
 	////////////////////////////////////////////////////////////
 	/// Component's ID as static member.
 	public static hash_t ID = hash!(T);
 }

 hash_t hash(T)()
 {
    hash_t hash;
    foreach (char c; T.stringof)
        hash = (hash * 9) + c;
    return hash;
 }

 Works perfectly :), now if i want to implement the same but
 rather do something like

 template GetHash(string character, hash_t hash = 0, size_t index
 = 0) {
 	static if (character[index])
 		enum GetHash = GetHash(character, hash = (hash * 9) +
 character[index], ++index);
 	else
 		enum GetHash = hash;
 }

 How should i implement it?

I came up with something like


template GetHash(string character, hash_t hash = 0, size_t index 
= 0) {
	static if (index < character.length)
		enum GetHash = GetHash!(character, (hash * 9) + 
character[index], index + 1);
	else
		enum GetHash = hash;
}

Oct 20 2013

"Agustin" <agustin.l.alvarez hotmail.com> writes:

On Sunday, 20 October 2013 at 22:04:49 UTC, Agustin wrote:
 On Sunday, 20 October 2013 at 21:54:37 UTC, Agustin wrote:
 On Sunday, 20 October 2013 at 02:14:55 UTC, TheFlyingFiddle 
 wrote:
 Anyway to evaluate the name of the class and return its hash 
 at compile time?

 I couldn't find the built in hash unction for strings so i 
 used the one from http://dlang.org/hash-map.html as an 
 example. More advanced and better hash functions can be found 
 online.

 public class ComponentDetail(T) : Component {
 	////////////////////////////////////////////////////////////
 	/// Component's ID as static member.
 	public static hash_t ID = hash!(T);
 }

 hash_t hash(T)()
 {
   hash_t hash;
   foreach (char c; T.stringof)
       hash = (hash * 9) + c;
   return hash;
 }

 Works perfectly :), now if i want to implement the same but
 rather do something like

 template GetHash(string character, hash_t hash = 0, size_t 
 index
 = 0) {
 	static if (character[index])
 		enum GetHash = GetHash(character, hash = (hash * 9) +
 character[index], ++index);
 	else
 		enum GetHash = hash;
 }

 How should i implement it?

 I came up with something like


 template GetHash(string character, hash_t hash = 0, size_t 
 index = 0) {
 	static if (index < character.length)
 		enum GetHash = GetHash!(character, (hash * 9) + 
 character[index], index + 1);
 	else
 		enum GetHash = hash;
 }

And the final template is

template Hash(string text, hash_t hash = 0, size_t index = 0) {
	static if (index < text.length)
		enum Hash = Hash!(text, (hash ^ text[index]) * 1099511628211UL, 
index + 1);
	else
		enum Hash = hash;
}

:D

Oct 20 2013

"bearophile" <bearophileHUGS lycos.com> writes:

Agustin:

 Sorry i clicked the post button :(. The full code is:

I don't see your error with the following code, please give the 
code that gives the error, so we can fix the compiler bug:


public class Component {
       ////////////////////////////////////////////////////////////
       /// Component's unique id.
       private hash_t id;
       ....
       ////////////////////////////////////////////////////////////
       /// \brief Default constructor.
       ///
       /// \param[in] id   The id of the component
       ////////////////////////////////////////////////////////////
       public this(hash_t id) {
           this.id = id;
           this.active = true;
           this.validated = true;
       }

       ....
}

public class ComponentDetail(T) : Component {
       ////////////////////////////////////////////////////////////
       /// Component's ID as static member.
       public static hash_t ID = typeid(T).toHash;

       ////////////////////////////////////////////////////////////
       /// \brief Default constructor.
       ////////////////////////////////////////////////////////////
       public this() {
           super(ID);
       }
}

private class InputComponent : ComponentDetail!InputComponent {
}

void main() {
       auto pComponent = new InputComponent();

       writeln(pComponent.getId());
       writeln(InputComponent.ID);
}



Bye,
bearophile

Oct 20 2013

"Agustin" <agustin.l.alvarez hotmail.com> writes:

On Monday, 21 October 2013 at 00:13:59 UTC, bearophile wrote:
 Agustin:

 Sorry i clicked the post button :(. The full code is:

 I don't see your error with the following code, please give the 
 code that gives the error, so we can fix the compiler bug:


 public class Component {
       
 ////////////////////////////////////////////////////////////
       /// Component's unique id.
       private hash_t id;
       ....Assertion failure: 'thisval && thisval->op ==

TOKclassreference' on line 4067 in file 'interpret.c' when
compiling this.
       
 ////////////////////////////////////////////////////////////
       /// \brief Default constructor.
       ///
       /// \param[in] id   The id of the component
       
 ////////////////////////////////////////////////////////////
       public this(hash_t id) {
           this.id = id;
           this.active = true;
           this.validated = true;
       }

       ....
 }

 public class ComponentDetail(T) : Component {
       
 ////////////////////////////////////////////////////////////
       /// Component's ID as static member.
       public static hash_t ID = typeid(T).toHash;

       
 ////////////////////////////////////////////////////////////
       /// \brief Default constructor.
       
 ////////////////////////////////////////////////////////////
       public this() {
           super(ID);
       }
 }

 private class InputComponent : ComponentDetail!InputComponent {
 }

 void main() {
       auto pComponent = new InputComponent();

       writeln(pComponent.getId());
       writeln(InputComponent.ID);
 }



 Bye,
 bearophile

The code is: http://pastebin.com/510YK2Se
Using (LDC 0.12.0-beta 1 Ubuntu): http://pastebin.com/2gAWnYyr
Using (DMD Windows): Assertion failure: 'thisval && thisval->op ==
TOKclassreference' on line 4067 in file 'interpret.c' when
compiling this.

Oct 20 2013

"bearophile" <bearophileHUGS lycos.com> writes:

Agustin:

 The code is: http://pastebin.com/510YK2Se
 Using (LDC 0.12.0-beta 1 Ubuntu): http://pastebin.com/2gAWnYyr
 Using (DMD Windows): Assertion failure: 'thisval && thisval->op 
 ==
 TOKclassreference' on line 4067 in file 'interpret.c' when
 compiling this.

Thank you. I presume this bug is already fixed in the latest 
release, dmd V.2.064beta2.

Bye,
bearophile

Oct 21 2013

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