Re: const char *

It looks like the compiler is treating "crabbing" as a const-qualified
string.  Since none of the set/get functions are expected to modify the key
string you pass, it seems sane to modify all of them to accept const
arguments (this guarantees that the function will just be looking at the
value of the string, and won't modify it.)  You could go through and change
all of the c/c++ client code to use const chars as arguments.  It would
probably require a lot of work; in order to preserve the const qualifier in
libplayerc you'd have to change the player_*prop_req_t structs (in
libplayerinterface/player.h) so the property string is a const, then you'd
have to change all the c and c++ function prototypes and definitions, etc.  

As a workaround, you might also be able to do something like:

char* property = "crabbing";
pp->SetIntProp(property,1); 

This should get gcc off your back since you'd be passing a plain old char*
like it wants.

Rich

-----Original Message-----
From: Fred Labrosse [mailto:[email protected]] 
Sent: Thursday, August 05, 2010 11:51 AM
To: [email protected]
Subject: [Playerstage-developers] const char *

All,

Whenever I call:

pp->SetIntProp("crabbing", 1);

my compiler complains:

warning: deprecated conversion from string constant to 'char*'

So I started editing clientproxy.h and clientproxy.cc in my svn working copy

to add the const's with a view of submitting a patch.

Obviously, the compilation fails because the underlying c code (in
playerc.h) 
does not have the const's.  I haven't done any pure c in a while so I'm not 
too sure what to do with that.  I think gcc will be happy with added
"const"s 
but this might not be generic enough.  And I'm not too sure what the 
repercussions of that will be with the rest of the code.  I could
const_cast, 
but this somehow defeats the point...

Any suggestions?

Cheers,

Fred

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