Question

This is a c program demonstrating some basic usage of the libxml2 library. Below is quoted from the main function:

LIBXML_TEST_VERSION example1Func(argv[1]);

What does this statement stand for?

I can only tell that LIBXML_TEST_VERSION is obviously a constant, and after that is a function call, that function returns nothing (void). But I’ve no idea what it means the statement in whole.

Answer 1

LIBXML_TEST_VERSION is not a constant – it’s a macro – see the documentation here:

Macro: LIBXML_TEST_VERSION

#define LIBXML_TEST_VERSION
Macro to check that the libxml version in use is compatible with the version the software has been compiled against

It’s also nothing to do with the call to example1func() – the code should look like this (comments are mine):

LIBXML_TEST_VERSION    // test libxml version

example1func();        // call example1func