C API: structured error information?

[Michele Alessandrini <michelealessandrini74@...>]

Hello to everyone.
When executing Lua from a C program, errors occurring in Lua code are 
reported as a string pushed on the stack. At least it's my understanding 
that this is the only way.
Is there a way to get a more "structured" error information? Like for 
example, separate the error code, the line number, the offending 
variable, the offending value, etc.
The formatted string makes it difficult to implement things like 
localized error messages, or different program behavior according to the 
kind of error.
I tried investigating the debug interface, but it does not seem to help 
in this regard.
Bye and thanks everybody for your work.
Michele