mirror of
https://github.com/SerenityOS/serenity
synced 2024-10-16 12:52:46 +00:00
acf341862a
These don't do short-circuit evaluation, and so I ran into some
some very subtle side-effects when converting code to DistinctNumeric.
In code like this:
MyDistinctNumeric n;
if (n && check_thing(n))
return;
There would be no short-circuit evaluation if the return type of
check_thing() was implicitly convertible to MyDistinctNumeric.
Ran into this while making Ext2FS::GroupIndex a DistinctNumeric.
308 lines
10 KiB
C++
308 lines
10 KiB
C++
/*
|
||
* Copyright (c) 2020, Ben Wiederhake <BenWiederhake.GitHub@gmx.de>
|
||
* All rights reserved.
|
||
*
|
||
* Redistribution and use in source and binary forms, with or without
|
||
* modification, are permitted provided that the following conditions are met:
|
||
*
|
||
* 1. Redistributions of source code must retain the above copyright notice, this
|
||
* list of conditions and the following disclaimer.
|
||
*
|
||
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
||
* this list of conditions and the following disclaimer in the documentation
|
||
* and/or other materials provided with the distribution.
|
||
*
|
||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
||
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
||
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
||
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
*/
|
||
|
||
#include <AK/TestSuite.h>
|
||
|
||
#include <AK/DistinctNumeric.h>
|
||
|
||
template<typename T>
|
||
class ForType {
|
||
public:
|
||
static void check_size()
|
||
{
|
||
TYPEDEF_DISTINCT_NUMERIC_GENERAL(T, false, false, false, false, false, false, TheNumeric);
|
||
EXPECT_EQ(sizeof(T), sizeof(TheNumeric));
|
||
}
|
||
};
|
||
|
||
TEST_CASE(check_size)
|
||
{
|
||
#define CHECK_SIZE_FOR_SIGNABLE(T) \
|
||
do { \
|
||
ForType<signed T>::check_size(); \
|
||
ForType<unsigned T>::check_size(); \
|
||
} while (false)
|
||
CHECK_SIZE_FOR_SIGNABLE(char);
|
||
CHECK_SIZE_FOR_SIGNABLE(short);
|
||
CHECK_SIZE_FOR_SIGNABLE(int);
|
||
CHECK_SIZE_FOR_SIGNABLE(long);
|
||
CHECK_SIZE_FOR_SIGNABLE(long long);
|
||
ForType<float>::check_size();
|
||
ForType<double>::check_size();
|
||
}
|
||
|
||
TYPEDEF_DISTINCT_NUMERIC_GENERAL(int, false, false, false, false, false, false, BareNumeric);
|
||
TYPEDEF_DISTINCT_NUMERIC_GENERAL(int, true, false, false, false, false, false, IncrNumeric);
|
||
TYPEDEF_DISTINCT_NUMERIC_GENERAL(int, false, true, false, false, false, false, CmpNumeric);
|
||
TYPEDEF_DISTINCT_NUMERIC_GENERAL(int, false, false, true, false, false, false, BoolNumeric);
|
||
TYPEDEF_DISTINCT_NUMERIC_GENERAL(int, false, false, false, true, false, false, FlagsNumeric);
|
||
TYPEDEF_DISTINCT_NUMERIC_GENERAL(int, false, false, false, false, true, false, ShiftNumeric);
|
||
TYPEDEF_DISTINCT_NUMERIC_GENERAL(int, false, false, false, false, false, true, ArithNumeric);
|
||
TYPEDEF_DISTINCT_NUMERIC_GENERAL(int, true, true, true, true, true, true, GeneralNumeric);
|
||
|
||
TEST_CASE(address_identity)
|
||
{
|
||
BareNumeric a = 4;
|
||
BareNumeric b = 5;
|
||
EXPECT_EQ(&a == &a, true);
|
||
EXPECT_EQ(&a == &b, false);
|
||
EXPECT_EQ(&a != &a, false);
|
||
EXPECT_EQ(&a != &b, true);
|
||
}
|
||
|
||
TEST_CASE(operator_identity)
|
||
{
|
||
BareNumeric a = 4;
|
||
BareNumeric b = 5;
|
||
EXPECT_EQ(a == a, true);
|
||
EXPECT_EQ(a == b, false);
|
||
EXPECT_EQ(a != a, false);
|
||
EXPECT_EQ(a != b, true);
|
||
}
|
||
|
||
TEST_CASE(operator_incr)
|
||
{
|
||
IncrNumeric a = 4;
|
||
IncrNumeric b = 5;
|
||
IncrNumeric c = 6;
|
||
EXPECT_EQ(++a, b);
|
||
EXPECT_EQ(a++, b);
|
||
EXPECT_EQ(a, c);
|
||
EXPECT_EQ(--a, b);
|
||
EXPECT_EQ(a--, b);
|
||
EXPECT(a != b);
|
||
}
|
||
|
||
TEST_CASE(operator_cmp)
|
||
{
|
||
CmpNumeric a = 4;
|
||
CmpNumeric b = 5;
|
||
CmpNumeric c = 5;
|
||
EXPECT_EQ(a > b, false);
|
||
EXPECT_EQ(a < b, true);
|
||
EXPECT_EQ(a >= b, false);
|
||
EXPECT_EQ(a <= b, true);
|
||
EXPECT_EQ(b > a, true);
|
||
EXPECT_EQ(b < a, false);
|
||
EXPECT_EQ(b >= a, true);
|
||
EXPECT_EQ(b <= a, false);
|
||
EXPECT_EQ(b > c, false);
|
||
EXPECT_EQ(b < c, false);
|
||
EXPECT_EQ(b >= c, true);
|
||
EXPECT_EQ(b <= c, true);
|
||
}
|
||
|
||
TEST_CASE(operator_bool)
|
||
{
|
||
BoolNumeric a = 0;
|
||
BoolNumeric b = 42;
|
||
BoolNumeric c = 1337;
|
||
EXPECT_EQ(!a, true);
|
||
EXPECT_EQ(!b, false);
|
||
EXPECT_EQ(!c, false);
|
||
}
|
||
|
||
TEST_CASE(operator_flags)
|
||
{
|
||
FlagsNumeric a = 0;
|
||
FlagsNumeric b = 0xA60;
|
||
FlagsNumeric c = 0x03B;
|
||
EXPECT_EQ(~a, FlagsNumeric(~0x0));
|
||
EXPECT_EQ(~b, FlagsNumeric(~0xA60));
|
||
EXPECT_EQ(~c, FlagsNumeric(~0x03B));
|
||
|
||
EXPECT_EQ(a & b, b & a);
|
||
EXPECT_EQ(a & c, c & a);
|
||
EXPECT_EQ(b & c, c & b);
|
||
EXPECT_EQ(a | b, b | a);
|
||
EXPECT_EQ(a | c, c | a);
|
||
EXPECT_EQ(b | c, c | b);
|
||
EXPECT_EQ(a ^ b, b ^ a);
|
||
EXPECT_EQ(a ^ c, c ^ a);
|
||
EXPECT_EQ(b ^ c, c ^ b);
|
||
|
||
EXPECT_EQ(a & b, FlagsNumeric(0x000));
|
||
EXPECT_EQ(a & c, FlagsNumeric(0x000));
|
||
EXPECT_EQ(b & c, FlagsNumeric(0x020));
|
||
EXPECT_EQ(a | b, FlagsNumeric(0xA60));
|
||
EXPECT_EQ(a | c, FlagsNumeric(0x03B));
|
||
EXPECT_EQ(b | c, FlagsNumeric(0xA7B));
|
||
EXPECT_EQ(a ^ b, FlagsNumeric(0xA60));
|
||
EXPECT_EQ(a ^ c, FlagsNumeric(0x03B));
|
||
EXPECT_EQ(b ^ c, FlagsNumeric(0xA5B));
|
||
|
||
EXPECT_EQ(a &= b, FlagsNumeric(0x000));
|
||
EXPECT_EQ(a, FlagsNumeric(0x000));
|
||
EXPECT_EQ(a |= b, FlagsNumeric(0xA60));
|
||
EXPECT_EQ(a, FlagsNumeric(0xA60));
|
||
EXPECT_EQ(a &= c, FlagsNumeric(0x020));
|
||
EXPECT_EQ(a, FlagsNumeric(0x020));
|
||
EXPECT_EQ(a ^= b, FlagsNumeric(0xA40));
|
||
EXPECT_EQ(a, FlagsNumeric(0xA40));
|
||
|
||
EXPECT_EQ(b, FlagsNumeric(0xA60));
|
||
EXPECT_EQ(c, FlagsNumeric(0x03B));
|
||
}
|
||
|
||
TEST_CASE(operator_shift)
|
||
{
|
||
ShiftNumeric a = 0x040;
|
||
EXPECT_EQ(a << ShiftNumeric(0), ShiftNumeric(0x040));
|
||
EXPECT_EQ(a << ShiftNumeric(1), ShiftNumeric(0x080));
|
||
EXPECT_EQ(a << ShiftNumeric(2), ShiftNumeric(0x100));
|
||
EXPECT_EQ(a >> ShiftNumeric(0), ShiftNumeric(0x040));
|
||
EXPECT_EQ(a >> ShiftNumeric(1), ShiftNumeric(0x020));
|
||
EXPECT_EQ(a >> ShiftNumeric(2), ShiftNumeric(0x010));
|
||
|
||
EXPECT_EQ(a <<= ShiftNumeric(5), ShiftNumeric(0x800));
|
||
EXPECT_EQ(a, ShiftNumeric(0x800));
|
||
EXPECT_EQ(a >>= ShiftNumeric(8), ShiftNumeric(0x008));
|
||
EXPECT_EQ(a, ShiftNumeric(0x008));
|
||
}
|
||
|
||
TEST_CASE(operator_arith)
|
||
{
|
||
ArithNumeric a = 12;
|
||
ArithNumeric b = 345;
|
||
EXPECT_EQ(a + b, ArithNumeric(357));
|
||
EXPECT_EQ(b + a, ArithNumeric(357));
|
||
EXPECT_EQ(a - b, ArithNumeric(-333));
|
||
EXPECT_EQ(b - a, ArithNumeric(333));
|
||
EXPECT_EQ(+a, ArithNumeric(12));
|
||
EXPECT_EQ(-a, ArithNumeric(-12));
|
||
EXPECT_EQ(a * b, ArithNumeric(4140));
|
||
EXPECT_EQ(b * a, ArithNumeric(4140));
|
||
EXPECT_EQ(a / b, ArithNumeric(0));
|
||
EXPECT_EQ(b / a, ArithNumeric(28));
|
||
EXPECT_EQ(a % b, ArithNumeric(12));
|
||
EXPECT_EQ(b % a, ArithNumeric(9));
|
||
|
||
EXPECT_EQ(a += a, ArithNumeric(24));
|
||
EXPECT_EQ(a, ArithNumeric(24));
|
||
EXPECT_EQ(a *= a, ArithNumeric(576));
|
||
EXPECT_EQ(a, ArithNumeric(576));
|
||
EXPECT_EQ(a /= a, ArithNumeric(1));
|
||
EXPECT_EQ(a, ArithNumeric(1));
|
||
EXPECT_EQ(a %= a, ArithNumeric(0));
|
||
EXPECT_EQ(a, ArithNumeric(0));
|
||
}
|
||
|
||
TEST_CASE(composability)
|
||
{
|
||
GeneralNumeric a = 0;
|
||
GeneralNumeric b = 1;
|
||
// Ident
|
||
EXPECT_EQ(a == a, true);
|
||
EXPECT_EQ(a == b, false);
|
||
// Incr
|
||
EXPECT_EQ(++a, b);
|
||
EXPECT_EQ(a--, b);
|
||
EXPECT_EQ(a == b, false);
|
||
// Cmp
|
||
EXPECT_EQ(a < b, true);
|
||
EXPECT_EQ(a >= b, false);
|
||
// Bool
|
||
EXPECT_EQ(!a, true);
|
||
// Flags
|
||
EXPECT_EQ(a & b, GeneralNumeric(0));
|
||
EXPECT_EQ(a | b, GeneralNumeric(1));
|
||
// Shift
|
||
EXPECT_EQ(b << GeneralNumeric(4), GeneralNumeric(0x10));
|
||
EXPECT_EQ(b >> b, GeneralNumeric(0));
|
||
// Arith
|
||
EXPECT_EQ(-b, GeneralNumeric(-1));
|
||
EXPECT_EQ(a + b, b);
|
||
EXPECT_EQ(b * GeneralNumeric(42), GeneralNumeric(42));
|
||
}
|
||
|
||
/*
|
||
* FIXME: These `negative_*` tests should cause precisely one compilation error
|
||
* each, and always for the specified reason. Currently we do not have a harness
|
||
* for that, so in order to run the test you need to set the #define to 1, compile
|
||
* it, and check the error messages manually.
|
||
*/
|
||
#define COMPILE_NEGATIVE_TESTS 0
|
||
#if COMPILE_NEGATIVE_TESTS
|
||
TEST_CASE(negative_incr)
|
||
{
|
||
BareNumeric a = 12;
|
||
a++;
|
||
// error: static assertion failed: 'a++' is only available for DistinctNumeric types with 'Incr'.
|
||
}
|
||
|
||
TEST_CASE(negative_cmp)
|
||
{
|
||
BareNumeric a = 12;
|
||
[[maybe_unused]] auto res = (a < a);
|
||
// error: static assertion failed: 'a<b' is only available for DistinctNumeric types with 'Cmp'.
|
||
}
|
||
|
||
TEST_CASE(negative_bool)
|
||
{
|
||
BareNumeric a = 12;
|
||
[[maybe_unused]] auto res = !a;
|
||
// error: static assertion failed: '!a', 'a&&b', 'a||b' and similar operators are only available for DistinctNumeric types with 'Bool'.
|
||
}
|
||
|
||
TEST_CASE(negative_flags)
|
||
{
|
||
BareNumeric a = 12;
|
||
[[maybe_unused]] auto res = (a & a);
|
||
// error: static assertion failed: 'a&b' is only available for DistinctNumeric types with 'Flags'.
|
||
}
|
||
|
||
TEST_CASE(negative_shift)
|
||
{
|
||
BareNumeric a = 12;
|
||
[[maybe_unused]] auto res = (a << a);
|
||
// error: static assertion failed: 'a<<b' is only available for DistinctNumeric types with 'Shift'.
|
||
}
|
||
|
||
TEST_CASE(negative_arith)
|
||
{
|
||
BareNumeric a = 12;
|
||
[[maybe_unused]] auto res = (a + a);
|
||
// error: static assertion failed: 'a+b' is only available for DistinctNumeric types with 'Arith'.
|
||
}
|
||
|
||
TEST_CASE(negative_incompatible)
|
||
{
|
||
GeneralNumeric a = 12;
|
||
ArithNumeric b = 345;
|
||
// And this is the entire point of `DistinctNumeric`:
|
||
// Theoretically, the operation *could* be supported, but we declared those int types incompatible.
|
||
[[maybe_unused]] auto res = (a + b);
|
||
// error: no match for ‘operator+’ (operand types are ‘GeneralNumeric’ {aka ‘AK::DistinctNumeric<int, true, true, true, true, true, true, 64, 64>’} and ‘ArithNumeric’ {aka ‘AK::DistinctNumeric<int, false, false, false, false, false, true, 64, 63>’})
|
||
// 313 | [[maybe_unused]] auto res = (a + b);
|
||
// | ~ ^ ~
|
||
// | | |
|
||
// | | DistinctNumeric<[...],false,false,false,false,false,[...],[...],63>
|
||
// | DistinctNumeric<[...],true,true,true,true,true,[...],[...],64>
|
||
}
|
||
#endif /* COMPILE_NEGATIVE_TESTS */
|
||
|
||
TEST_MAIN(DistinctNumeric)
|