v/vlib/v/tests/fn_index_direct_call_test.v

struct Placeholder {
	name string
}

struct FnStruct {
mut:
	array_of_fn []fn (int, &Placeholder, string) bool
}

fn test_fn_array_direct_call() {
	mut fs := FnStruct{}
	fs.array_of_fn << fn (x int, y &Placeholder, z string) bool {
		return false
	}

	println(fs.array_of_fn[0](1, &Placeholder{ name: 'Bob' }, 'Builder'))
	assert fs.array_of_fn[0](1, &Placeholder{ name: 'Bob' }, 'Builder') == false
}

fn test_fn_map_direct_call() {
	a := {
		'aaa': fn () string {
			return 'aaa'
		}
		'bbb': fn () string {
			return 'bbb'
		}
	}
	println(a['aaa']())
	println(a['bbb']())
	assert a['aaa']() == 'aaa'
	assert a['bbb']() == 'bbb'
}