The `int()` function converts the given value into a signed integer
value and returns the resulting number. In case the value is of type
string, a second optional base argument may be specified which is
passed to the underlying strtoll(3) implementation.

Returns `NaN` if the given argument is not convertible into a number.
Returns `NaN` if the conversion result is out of range.

-- Testcase --
{%
	printf("%.J\n", [
		int(),
		int(false),
		int(123),
		int(456.789),
		int(""),
		int("invalid"),
		int("deaf"),
		int("0x1000"),
		int("0xffffffffffffffff"),
		int("0177"),
		int("+145"),
		int("-96"),
		int("0177", 8),
		int("0x1000", 16),
		int("1111", 2),
		int("0xffffffffffffffff", 16)
	]);
%}
-- End --

-- Expect stdout --
[
	0,
	0,
	123,
	456,
	"NaN",
	"NaN",
	"NaN",
	0,
	0,
	177,
	145,
	-96,
	127,
	4096,
	15,
	"NaN"
]
-- End --