#1338 Cannot instantiate abstract class base

[Mathieu Malaterre]

I am getting the following error:

$ php -d enable_dl=On test.php
PHP Fatal error: Cannot instantiate abstract class base in demo.php on line 100

swig generates:

static function create_concrete($b=true) {
    $r=base_create_concrete($b);
    if (!is_resource($r)) return $r;
    switch (get_resource_type($r)) {
    case '_p_base': return new base($r);
    default: return new base($r);
    }
}

for the following input C++:

struct base
{
 virtual void foo() = 0;
 static base * create_concrete(bool b = true);
};

Full example is at:
https://github.com/malaterre/PublicRep/tree/master/SWIG/virtualbase

[Olly Betts]

This is fixed in git master, presumably by the rewrite to use PHP's C API to create classes instead of generating a .php script which defines them.

The test needs adjusting to remove require_once( 'demo.php' ); (as that file no longer gets generated at all) and then the output is now:

$ php7.4 -d extension=~+/demo.so test.php
blaconcrete::foo
toto3

(PHP resources are no longer used by SWIG in the generated wrapper code, so the is_resource() checks in your test code will all be false now.)

This work will be in PHP 4.1.0.