Thread: What is here defined? Please help

Hi all,

I don`t understand what exactly in typedef GIOPBool is defined?
Can someone help me out?

Code:

...
struct ApplAdminCmdAndProcessingFunction;
friend class ApplAdminCmdAndProcessingFunction;

typedef GIOPBool (
SrvInvocationListener:: * ApplAdminCmdProcessingFct)(
 const char * myCmdName,
 size_t argc,
 // 'argv[0]' is the command name
 // as contained in the command
 const char * argv[],
 // '* output' is expected to become 0
 // or to point to a buffer allocated via 'new []';
 // '* output' is expected to keep
 // - the command execution result
 // on success (if 'GIOPTrue' is returned)
 // - an error message
 // on error (if 'GIOPFalse' is returned)
 char ** output);

struct ApplAdminCmdAndProcessingFunction
{
 const char * m_cmdName;
 ApplAdminCmdProcessingFct m_fct;
 const char * m_argNames[16 + 1];
};

static const ApplAdminCmdAndProcessingFunction allCmds[];
static const ApplAdminCmdAndProcessingFunction * const helpCmd;

GIOPBool cmdHelp(
 const char * myCmdName,
 size_t argc,
 const char * argv[],
 char ** output)
 throw();

GIOPBool cmdReportStatisticData(
 const char * myCmdName,
 size_t argc,
 const char * argv[],
 char ** output)
 throw();

...

Originally Posted by Salem

It's defining ApplAdminCmdProcessingFct as being a function pointer.


The Function Pointer Tutorials - Index

And what is GIOPBool cmdHelp and GIOPBool cmdReportStatisticData?

Originally Posted by Salem

They're just regular function prototypes.

What about these one:

Code:

struct ApplAdminCmdAndProcessingFunction
{
 const char * m_cmdName;
 ApplAdminCmdProcessingFct m_fct;
 const char * m_argNames[16 + 1];
};
 
static const ApplAdminCmdAndProcessingFunction allCmds[];
static const ApplAdminCmdAndProcessingFunction * const helpCmd;

Originally Posted by Elysia

ApplAdminCmdAndProcessingFunction is a struct.
Line #8 is not valid C++, but it is apparently trying to declare an array of ApplAdminCmdAndProcessingFunction objects.
Line #9 creates a pointer to a const ApplAdminCmdAndProcessingFunction. The pointer itself is also const. So you can't change the object it points to, and you can't change he pointer itself. I'm not sure that should compile.

Thank you very much. But I didn`t get the whole context..What is the programmer trying to do here?