# 1) get field

a.foo = 12;
b = struct_get(a, "foo");

if (b != 12) exit(1);


# 2) set field

a.foo = 42;
b = struct_set(a, "foo", "2.41");

if (a.foo != 42 || b.foo != "2.41") exit(2);


# 3) unset field

a.foo = 12;
a.bar = 100;
b = struct_unset(a, "foo");

if (a.foo != 12 || a.bar != 100 || b.foo != () || b.bar != 100) exit(3);


# 4) field list

a = mkstruct("foo", 42, "bar", 100);
b = struct_fields(a);

if ((int) b != 2 || b[0] != "foo" || b[1] != "bar") exit(4);


# 5) field test

a = mkstruct("foo", 42, "bar", 100);
p = is_field(a, "foo");
q = is_field(a, "qux");

if (!p || q) exit(5);


# 6) merge structures

a = mkstruct("foo", 42, "bar", 100);
b = mkstruct("qux", 12);
c = struct_merge(a, b);

if (c.foo != 42 || c.bar != 100 || c.qux != 12) exit(6);


# 7) merge with overwrite

a = mkstruct("foo", 42, "bar", 100);
b = mkstruct("foo", 12);
c = struct_merge(a, b);

if (c.foo != 12 || c.bar != 100) exit(7);


# 8) method list

template foo
{
  void x() { return 0; }
  void y() { return 1; }
}
a = new foo();
b = struct_methods(a);

if ((int) b != 2 || b[0] != "y" || b[1] != "x") exit(8);


# 9) method test

template foo
{
  void x() { return 0; }
  void y() { return 1; }
}
a = new foo();

if (!is_method(a, "x") || is_method(a,"foo")) exit(9);


# 10) struct merge with functions

template foo
{
  i = 1;
  void x() { return 0; }
}
template bar
{
  i = 2;
  void y() { return 1; }
}
a = new foo();
b = new bar();
c = struct_merge(a,b);

if (c.__template != "bar" || c.i != 2 || !is_method(c, "x") ||
    !is_method(c, "y")) exit(10);


print("10 subtests ");