Thread overview
[ddbg] "Access violation" and "Invalid val type" with dictionaries
Jun 26, 2007
Ary Manzana
Jun 28, 2007
Jascha Wetzel
Jun 28, 2007
Ary Manzana
Jun 30, 2007
Jascha Wetzel
June 26, 2007
Hi Jascha,

Take the following code:

---
module main;

import std.stdio;

class Point {
	
	int x;
	int y;
	
	this(int x, int y) {
		this.x = x;
		this.y = y;
	}
	
	public override char[] toString() {
		return "(" ~ std.string.toString(x) ~ ", " ~ std.string.toString(y) ~ ")";
	}
	
}

void main() {
	Point[int] dictionary;
	dictionary[1] = new Point(1, 10);
	dictionary[2] = new Point(2, 20);
	dictionary[3] = new Point(3, 30);
	
	writefln("%s", dictionary[1]);
}
---

If you run it, you'll see (1, 10) as the output. However, if you set a breakpoint in the writefln line and you try to access dictionary[1]:

->= dictionary[1]
Access Violation
->= dictionary[cast(int)1]
Access Violation

Further:

->= dictionary
invalid val type PC4main5Point

Is this a bug in ddbg?

Regards,
Ary
June 28, 2007
it's missing support for class types in associative arrays, and a missing warning message about that ;)
the next release will fix it.

Ary Manzana wrote:
> Hi Jascha,
> 
> Take the following code:
> 
> ---
> module main;
> 
> import std.stdio;
> 
> class Point {
>         int x;
>     int y;
>         this(int x, int y) {
>         this.x = x;
>         this.y = y;
>     }
>         public override char[] toString() {
>         return "(" ~ std.string.toString(x) ~ ", " ~ std.string.toString(y) ~ ")";
>     }
>     }
> 
> void main() {
>     Point[int] dictionary;
>     dictionary[1] = new Point(1, 10);
>     dictionary[2] = new Point(2, 20);
>     dictionary[3] = new Point(3, 30);
>         writefln("%s", dictionary[1]);
> }
> ---
> 
> If you run it, you'll see (1, 10) as the output. However, if you set a breakpoint in the writefln line and you try to access dictionary[1]:
> 
> ->= dictionary[1]
> Access Violation
> ->= dictionary[cast(int)1]
> Access Violation
> 
> Further:
> 
> ->= dictionary
> invalid val type PC4main5Point
> 
> Is this a bug in ddbg?
> 
> Regards,
> Ary
June 28, 2007
Thanks!

Just a curiosity: why "= dictionary.length" gives me the length in hexadecimal?

Another one: if the length of an array or a dictionary is big enough (> 100) then I'd like to group by 100 the contents (like in JDT). So I'll request the length of the array, and work on that. However, currently ddbg only allows me to show around 30 entries, the last one being shown as "$". That means I'll have to group by 30 or less. Can this number be configured somehow?

Jascha Wetzel escribió:
> it's missing support for class types in associative arrays, and a missing warning message about that ;)
> the next release will fix it.
> 
> Ary Manzana wrote:
>> Hi Jascha,
>>
>> Take the following code:
>>
>> ---
>> module main;
>>
>> import std.stdio;
>>
>> class Point {
>>         int x;
>>     int y;
>>         this(int x, int y) {
>>         this.x = x;
>>         this.y = y;
>>     }
>>         public override char[] toString() {
>>         return "(" ~ std.string.toString(x) ~ ", " ~ std.string.toString(y) ~ ")";
>>     }
>>     }
>>
>> void main() {
>>     Point[int] dictionary;
>>     dictionary[1] = new Point(1, 10);
>>     dictionary[2] = new Point(2, 20);
>>     dictionary[3] = new Point(3, 30);
>>         writefln("%s", dictionary[1]);
ha>> }"
>> ---
>>
>> If you run it, you'll see (1, 10) as the output. However, if you set a breakpoint in the writefln line and you try to access dictionary[1]:
>>
>> ->= dictionary[1]
>> Access Violation
>> ->= dictionary[cast(int)1]
>> Access Violation
>>
>> Further:
>>
>> ->= dictionary
>> invalid val type PC4main5Point
>>
>> Is this a bug in ddbg?
>>
>> Regards,
>> Ary
June 30, 2007
Ary Manzana wrote:
> Just a curiosity: why "= dictionary.length" gives me the length in hexadecimal?

the length is a uint and uints, voids and pointers are printed in hex at the moment.

> Another one: if the length of an array or a dictionary is big enough (> 100) then I'd like to group by 100 the contents (like in JDT). So I'll request the length of the array, and work on that. However, currently ddbg only allows me to show around 30 entries, the last one being shown as "$". That means I'll have to group by 30 or less. Can this number be configured somehow?

it'll be in the next release.