module std::core::formatter_test;

import std;

struct Foo (Printable) { int a; }
fn usz? Foo.to_format(&self, Formatter *f) @dynamic
{
	return f.printf("Foo[%d]", self.a);
}

enum FormatterEnum
{
	ABC,
	BCD,
	EFG,
}

fn void test_ref() @test
{
	Foo* f = &&(Foo){ 8 };
	Foo* f0 = null;
	int* a = (void*)(uptr)0x40;
	int* b = null;
	String s = string::format(mem, "%s %s %s %s %s", a, b, f0, f, *f);
	defer free(s);
	assert(s == "0x40 0x0 (null) Foo[8] Foo[8]");

	double d1 = 6.62607015e-34d;
	double d2 = 0.0d;
	double d3 = -0.0d;
	double d4 = double.inf;
	double d5 = -double.inf;
	double d6 = -4.932096661796888e-226d;
	double d7 = 3.439070283483335e+35d;
	double d8 = 6.606854224493745e-17d;
	double d9 = 6.079537928711555e+61d;
	String s2 = string::format(mem, "%.9g %g %g %g %g %.16g %.16g %.16g %.16g", d1, d2, d3, d4, d5, d6, d7, d8, d9);
	defer free(s2);
	test::eq(s2, "6.62607015e-34 0 -0 inf -inf -4.932096661796888e-226 3.439070283483335e+35 6.606854224493745e-17 6.079537928711555e+61");

	double t1 = 12345.9d;
	double t2 = 0.00087654d;
	double t3 = 1234567.0d;
	double t4 = 12.345d;
	double t5 = 12.3d;
	double t6 = 0.9999999d;
	double t7 = 3.141592653589793d;
	String s3 = string::format(mem, "%.3e %.3e %.4g %.4g %#.4g %.3f %.15f", t1, t2, t3, t4, t5, t6, t7);
	defer free(s3);
	assert(s3 == "1.235e+04 8.765e-04 1.235e+06 12.35 12.30 1.000 3.141592653589793");
}

fn void test_uint128_decimal_formatting() @test
{
	uint128 v = 0xFFEEDDCC_BBAA9988_77665544_33221100;
	String s = string::format(mem, "%d", v);
	defer free(s);
	test::eq(s, "340193404210632335760508365704335069440");

	String s2 = string::format(mem, "%d", uint128.max);
	defer free(s2);
	test::eq(s2, "340282366920938463463374607431768211455");
}

fn void test_mixed_format_with_uint128() @test
{
	int a = 1234;
	uint128 b = 0xFFEEDDCC_BBAA9988_77665544_33221100;
	FormatterEnum e = BCD;
	String s = string::format(mem, "a: %s, b: %d, foo: %s", a, b, e);
	defer free(s);
	test::eq(s, "a: 1234, b: 340193404210632335760508365704335069440, foo: BCD");
}