Pointers to functions

[MikeW]

I need a bit of help on this.

I have found several good threads on how to parse an rs232 command line, and act upon it.

Trampas, and Mark are the Gurus on this.

I am trying to get the code below to compile, but it throws up the error "expression must evaluate to a constant"


below is the code in question.

the original thread is :-
http://www.ccsinfo.com/forum/viewtopic.php?t=20416&postdays=0&postorder=asc&start=0

page 2 is the important page

void version()
{
printf(OutputPC," version function \n\r");
} // end of function


void build()
{
printf(OutputPC," build function \n\r");
} // end of function

void BCOM()
{
printf(OutputPC," BCOM function \n\r");
} // end of function

void CAMR()
{
printf(OutputPC," CAMR function \n\r");
} // end of function


static Command CommandData[] =
{
{"ver",version}, //********** fails here ***********
{"build",build},
{"BCOM=",BCOM},
{"CAMR=",CAMR},
{"\0",0}}
};


static COMMAND_DATA CommandData[] =
{

/* application commands */
{ { "ver" }, VersionCommand, { "sofware version" } },
{ { "abus" }, ABUSCommand, { "sends command out abus" } },
{ { "input" }, InputCommand, { "input status" } },
{ { "photocell" }, PhotocellCommand, { "photocell status" } },
{ { "data" }, DataCommand, { "dump program data" } },
{ { "restore" }, ReInitCommand, { "restore defaults" } },
{ { "restart" }, RestartCommand, { "restart device" } },
{ { "dump" }, EEPROMDumpCommand,{ "dumps the contents of the eeprom" } },
{ { "host" }, HostModeCommand, { "allows this device to act as host" } },
{ { "??" }, VHelpCommand, { "verbose help" } },
{ { "?" }, THelpCommand, { "terse help" } },
{ { NULL }, NULL, { NULL } },
};

[PCM programmer]

Those two guys have mixed CCS and C18 code throughout the thread.
Sometimes it's not clear which one they're talking about.

[MikeW]

I could really do with some help on this.

Mike

[kender]

Mike, I really hate to break these news. But v3 never supported function pointers and v4 might support them eventually, but right now function pointers in v4 are full of bugs.

I wish I were wrong on this one.

[ckielstra]

Also read the PICC manual chapter "How do I make a pointer to a function?" on why function pointers are not supported and a possible workaround.