digitalmars.D.learn - Range violation error in the code
- Ishan Thilina (36/36) Apr 12 2011 I can compile the following code. But when I run the program it gives me...
- Christian Manning (4/40) Apr 12 2011 Seems like Node*[] pointers needs to have a defined length before
- Ishan Thilina (4/13) Apr 12 2011 Thanks, it works...!
- spir (12/36) Apr 12 2011 There is no node in pointers as of now, thus pointers[i] can only be a r...
- Steven Schveighoffer (10/52) Apr 12 2011 An array does not dynamically adjust its length when you assign an
- Ishan Thilina (1/9) Apr 12 2011 Thank you..!. That clarifies the things a lot. :)
I can compile the following code. But when I run the program it gives me a
"core.exception.RangeError untitled(34): Range violation
" error.
The code is as follows.
"
import std.stdio;
int main(char[][] args)
{
struct Node{
int _value;
Node* _next,_prev,_up,_down;
}
Node*[] pointers;
int i=0;
auto n=new Node;
pointers[i]=n;
return 0;
}
"
Here's the error.
"
core.exception.RangeError untitled(34): Range violation
----------------
/home/ishan/untitled(onRangeError+0x28) [0x8098a08]
/home/ishan/untitled(_d_array_bounds+0x16) [0x80968c6]
/home/ishan/untitled(_D8untitled7__arrayZ+0x12) [0x8094332]
/home/ishan/untitled(_Dmain+0x35) [0x8094309]
/home/ishan/untitled(_D2rt6dmain24mainUiPPaZi7runMainMFZv+0x1a) [0x8096a26]
/home/ishan/untitled(_D2rt6dmain24mainUiPPaZi7tryExecMFMDFZvZv+0x20) [0x80969b8]
/home/ishan/untitled(_D2rt6dmain24mainUiPPaZi6runAllMFZv+0x32) [0x8096a6a]
/home/ishan/untitled(_D2rt6dmain24mainUiPPaZi7tryExecMFMDFZvZv+0x20) [0x80969b8]
/home/ishan/untitled(main+0x94) [0x8096964]
/lib32/libc.so.6(__libc_start_main+0xe7) [0xf7613ce7]
/home/ishan/untitled() [0x8094221]
"
As it seems the problem is with the line "pointers[i]=n". What's wrong here? :s
Apr 12 2011
On 12/04/2011 13:20, Ishan Thilina wrote:
I can compile the following code. But when I run the program it gives me a
"core.exception.RangeError untitled(34): Range violation
" error.
The code is as follows.
"
import std.stdio;
int main(char[][] args)
{
struct Node{
int _value;
Node* _next,_prev,_up,_down;
}
Node*[] pointers;
int i=0;
auto n=new Node;
pointers[i]=n;
return 0;
}
"
Here's the error.
"
core.exception.RangeError untitled(34): Range violation
----------------
/home/ishan/untitled(onRangeError+0x28) [0x8098a08]
/home/ishan/untitled(_d_array_bounds+0x16) [0x80968c6]
/home/ishan/untitled(_D8untitled7__arrayZ+0x12) [0x8094332]
/home/ishan/untitled(_Dmain+0x35) [0x8094309]
/home/ishan/untitled(_D2rt6dmain24mainUiPPaZi7runMainMFZv+0x1a) [0x8096a26]
/home/ishan/untitled(_D2rt6dmain24mainUiPPaZi7tryExecMFMDFZvZv+0x20)
[0x80969b8]
/home/ishan/untitled(_D2rt6dmain24mainUiPPaZi6runAllMFZv+0x32) [0x8096a6a]
/home/ishan/untitled(_D2rt6dmain24mainUiPPaZi7tryExecMFMDFZvZv+0x20)
[0x80969b8]
/home/ishan/untitled(main+0x94) [0x8096964]
/lib32/libc.so.6(__libc_start_main+0xe7) [0xf7613ce7]
/home/ishan/untitled() [0x8094221]
"
As it seems the problem is with the line "pointers[i]=n". What's wrong here? :s
Seems like Node*[] pointers needs to have a defined length before
allocating to an index as adding "++pointers.length;" before
"pointers[i]=n;" makes it work fine.
Apr 12 2011
Ishan Thilina <ishanthilina gmail.com> -Christian Manning wrote:Seems like Node*[] pointers needs to have a defined length before allocating to an index as adding "++pointers.length;" before "pointers[i]=n;" makes it work fine.Thanks, it works...! -Denis wrote:There is no node in pointers as of now, thus pointers[i] can only be a range violation, whatever i (even 0, which should point to the *first* node). pointers[i]=n; would *change* the current element number i. To put a *new* node into pointers, if that's what you intended, use the '~' appending operator (here in version >'~='); pointers ~= n;Yes, that's exactly what I wanted to do. Thanks...!
Apr 12 2011
On 04/12/2011 02:20 PM, Ishan Thilina wrote:
I can compile the following code. But when I run the program it gives me a
"core.exception.RangeError untitled(34): Range violation
" error.
The code is as follows.
"
import std.stdio;
int main(char[][] args)
{
struct Node{
int _value;
Node* _next,_prev,_up,_down;
}
Node*[] pointers;
int i=0;
auto n=new Node;
pointers[i]=n;
return 0;
}
"
Here's the error.
"
core.exception.RangeError untitled(34): Range violation
[...]
As it seems the problem is with the line "pointers[i]=n". What's wrong here? :s
There is no node in pointers as of now, thus pointers[i] can only be a range
violation, whatever i (even 0, which should point to the *first* node).
pointers[i]=n;
would *change* the current element number i. To put a *new* node into pointers,
if that's what you intended, use the '~' appending operator (here in version
'~=');
pointers ~= n;
Denis
--
_________________
vita es estrany
spir.wikidot.com
Apr 12 2011
On Tue, 12 Apr 2011 08:20:20 -0400, Ishan Thilina <ishanthilina gmail.com>
wrote:
I can compile the following code. But when I run the program it gives me
a
"core.exception.RangeError untitled(34): Range violation
" error.
The code is as follows.
"
import std.stdio;
int main(char[][] args)
{
struct Node{
int _value;
Node* _next,_prev,_up,_down;
}
Node*[] pointers;
int i=0;
auto n=new Node;
pointers[i]=n;
return 0;
}
"
Here's the error.
"
core.exception.RangeError untitled(34): Range violation
----------------
/home/ishan/untitled(onRangeError+0x28) [0x8098a08]
/home/ishan/untitled(_d_array_bounds+0x16) [0x80968c6]
/home/ishan/untitled(_D8untitled7__arrayZ+0x12) [0x8094332]
/home/ishan/untitled(_Dmain+0x35) [0x8094309]
/home/ishan/untitled(_D2rt6dmain24mainUiPPaZi7runMainMFZv+0x1a)
[0x8096a26]
/home/ishan/untitled(_D2rt6dmain24mainUiPPaZi7tryExecMFMDFZvZv+0x20)
[0x80969b8]
/home/ishan/untitled(_D2rt6dmain24mainUiPPaZi6runAllMFZv+0x32)
[0x8096a6a]
/home/ishan/untitled(_D2rt6dmain24mainUiPPaZi7tryExecMFMDFZvZv+0x20)
[0x80969b8]
/home/ishan/untitled(main+0x94) [0x8096964]
/lib32/libc.so.6(__libc_start_main+0xe7) [0xf7613ce7]
/home/ishan/untitled() [0x8094221]
"
As it seems the problem is with the line "pointers[i]=n". What's wrong
here? :s
An array does not dynamically adjust its length when you assign an
element, you have to assign the length explicitly before-hand. Some
dynamic languages do this (like Javascript), but not D.
You can achieve this with an associative array:
Node*[int] pointers;
However, iterating an AA does not guarantee order. So it depends on your
requirements.
-Steve
Apr 12 2011
An array does not dynamically adjust its length when you assign an element, you have to assign the length explicitly before-hand. Some dynamic languages do this (like Javascript), but not D. You can achieve this with an associative array: Node*[int] pointers; However, iterating an AA does not guarantee order. So it depends on your requirements. -SteveThank you..!. That clarifies the things a lot. :)
Apr 12 2011