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D - access violation

reply vicentico <vicentico_member pathlink.com> writes:
why im getting an access violation in a call to a member function???... what are
the posible reasons??

greetings

vicentico
Aug 06 2003
parent reply "Sean L. Palmer" <palmer.sean verizon.net> writes:
Just one... accessing of memory that your app doesn't own.   ;)

Perhaps an example of what you're trying to do and what you've tried to do
to figure it out would help us to help you better.

Sean

"vicentico" <vicentico_member pathlink.com> wrote in message
news:bgra10$12js$1 digitaldaemon.com...

 why im getting an access violation in a call to a member function???...


what are

 the posible reasons??

 greetings

 vicentico
Aug 06 2003
parent reply vicentico <vicentico_member pathlink.com> writes:
this is the call:

TableItem* result = table.search(ws, index-ws);

table.search is a public method, ws is a char* that points to a global char
array in the main module. index is another char* that points to a position in
the same char array. TableItem is a struct declared in another module.

table is declared in the main module, it doesnt have a constructor. i assume
that the error is in the function call because table.search prints a string
before executing any code, and the code before the call has been tested too.

i hope that i had been doing something wrong and that this is not another bug in
the compiler...


vicentico

Just one... accessing of memory that your app doesn't own.   ;)

Perhaps an example of what you're trying to do and what you've tried to do
to figure it out would help us to help you better.

Sean

"vicentico" <vicentico_member pathlink.com> wrote in message
news:bgra10$12js$1 digitaldaemon.com...

 why im getting an access violation in a call to a member function???...


what are

 the posible reasons??

 greetings

 vicentico
Aug 06 2003
parent reply "Carlos Santander B." <carlos8294 msn.com> writes:
"vicentico" <vicentico_member pathlink.com> wrote in message
news:bgrctv$15qs$1 digitaldaemon.com...
| this is the call:
|
| TableItem* result = table.search(ws, index-ws);
|
| table.search is a public method, ws is a char* that points to a global
char
| array in the main module. index is another char* that points to a position
in
| the same char array. TableItem is a struct declared in another module.
|
| table is declared in the main module, it doesnt have a constructor. i
assume
| that the error is in the function call because table.search prints a
string
| before executing any code, and the code before the call has been tested
too.
|
| i hope that i had been doing something wrong and that this is not another
bug in
| the compiler...
|
|
| vicentico

Make sure you're "newing" table: table=new whatever(...);

—————————————————————————
Carlos Santander


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Aug 06 2003
parent reply vicentico <vicentico_member pathlink.com> writes:
In article <bgrji9$1cb9$1 digitaldaemon.com>, Carlos Santander B. says...

"vicentico" <vicentico_member pathlink.com> wrote in message
news:bgrctv$15qs$1 digitaldaemon.com...
| this is the call:
|
| TableItem* result = table.search(ws, index-ws);
|
| table.search is a public method, ws is a char* that points to a global
char
| array in the main module. index is another char* that points to a position
in
| the same char array. TableItem is a struct declared in another module.
|
| table is declared in the main module, it doesnt have a constructor. i
assume
| that the error is in the function call because table.search prints a
string
| before executing any code, and the code before the call has been tested
too.
|
| i hope that i had been doing something wrong and that this is not another
bug in
| the compiler...
|
|
| vicentico

Make sure you're "newing" table: table=new whatever(...);


the class has no constructor and when i try to do the "newing" i get a compiler
error. Even if I define a blank constructor the error is still there.


—————————————————————————
Carlos Santander
Aug 06 2003
parent reply "Carlos Santander B." <carlos8294 msn.com> writes:
"vicentico" <vicentico_member pathlink.com> wrote in message
news:bgrr1o$1jmo$1 digitaldaemon.com...
| the class has no constructor and when i try to do the "newing" i get a
compiler
| error. Even if I define a blank constructor the error is still there.
|

The compiler error has nothing to do with the class having no constructor.
For example, the following compiles just fine:

class X {}
void main() { X x=new X(); }

I'm guessing your problem is around there because I've had that too :), and
very often some persons ask about almost the same.

—————————————————————————
Carlos Santander


---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
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Aug 06 2003
parent reply vicentico <vicentico_member pathlink.com> writes:
In article <bgsfso$2666$1 digitaldaemon.com>, Carlos Santander B. says...

The compiler error has nothing to do with the class having no constructor.
For example, the following compiles just fine:

class X {}
void main() { X x=new X(); }


i get this error if i try to initialize to the default constructor

Application application = new Application();
C:\DMD\IMP\X\APPLIC~1.D(61): non-constant expression new Application 



I'm guessing your problem is around there because I've had that too :), and
very often some persons ask about almost the same.

—————————————————————————
Carlos Santander


---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.507 / Virus Database: 304 - Release Date: 2003-08-04
Aug 07 2003
parent reply "Vathix" <vathix dprogramming.com> writes:
"vicentico" <vicentico_member pathlink.com> wrote in message
news:bgtq4e$e86$1 digitaldaemon.com...

 In article <bgsfso$2666$1 digitaldaemon.com>, Carlos Santander B. says...

The compiler error has nothing to do with the class having no




constructor.

For example, the following compiles just fine:

class X {}
void main() { X x=new X(); }


 i get this error if i try to initialize to the default constructor

 Application application = new Application();
 C:\DMD\IMP\X\APPLIC~1.D(61): non-constant expression new Application



I'm guessing your problem is around there because I've had that too :),




and

very often some persons ask about almost the same.

-------------------------
Carlos Santander


---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.507 / Virus Database: 304 - Release Date: 2003-08-04




If it's static or global you'll have to put the assignment in a static
constructor:

Application application;
static this()
{
  application = new Application();
}
Aug 07 2003
parent "Sean L. Palmer" <palmer.sean verizon.net> writes:
This is BS, Walter.  Please allow static initialization of arrays, structs,
object references, and effectively move the code from global scope into the
start of the static constructor.

D would be easy to use, *except* that you have all these restrictions that
cause us to have to do things the non-intuitive way, apparently in the name
of readability or keeping the compiler implementation simple.

I believe everyone's gut instinct is to put initializations at the point of
declaration.  It's easier to maintain if they're kept together, as well.

Sean

"Vathix" <vathix dprogramming.com> wrote in message
news:bgtvg9$jgu$1 digitaldaemon.com...

 If it's static or global you'll have to put the assignment in a static
 constructor:

 Application application;
 static this()
 {
   application = new Application();
 }
Aug 07 2003