RE: How do I check for errors returned from a C function?

["Erik Cassel" <erik@...>]

I suppose people have discussed the merits of adding try/catch/finally
semantics to Lua...

 

-Erik

 

 

  _____  

From: lua-bounces@bazar2.conectiva.com.br
[mailto:lua-bounces@bazar2.conectiva.com.br] On Behalf Of Dolan, Ryanne
Thomas (UMR-Student)
Sent: Friday, December 30, 2005 8:06 AM
To: Lua list
Subject: RE: How do I check for errors returned from a C function?

 

two ways i can think of:

 

Just return a boolean from your C function, and have your Lua script check
this value against true:

 

if not Entity:SendText ("Hello!") then

    print ("SendText failed!");

end;

 

Or, use lua_error in your C function and call SendText in a protected
environment:

 

local success, error_msg = pcall (Entity:SendText, "Hello!");

 

if not success then

    print ("SendText failed:  ", error_msg);

end;

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