Allow specifying StorageType for BitField

This is useful for BitFields that are bools.
This commit is contained in:
Pokechu22 2021-02-17 20:23:06 -08:00
parent 6653bd7199
commit cf95deaf6d
2 changed files with 27 additions and 13 deletions

View file

@ -21,6 +21,8 @@ union TestUnion
BitField<30, 4, s64> at_dword_boundary; // goes over the boundary of two u32 values
BitField<15, 1, s64> signed_1bit; // allowed values: -1 and 0
BitField<63, 1, bool, u64> flag;
};
// table of raw numbers to test with
@ -51,6 +53,7 @@ TEST(BitField, Storage)
EXPECT_EQ(sizeof(TestUnion), sizeof(object.regular_field_signed));
EXPECT_EQ(sizeof(TestUnion), sizeof(object.at_dword_boundary));
EXPECT_EQ(sizeof(TestUnion), sizeof(object.signed_1bit));
EXPECT_EQ(sizeof(TestUnion), sizeof(object.flag));
// Now write some values to one field and check if this reflects properly
// in the others.
@ -82,6 +85,7 @@ TEST(BitField, Read)
EXPECT_EQ(object.regular_field_signed, (s64)object.regular_field_signed);
EXPECT_EQ(object.at_dword_boundary, (s64)object.at_dword_boundary);
EXPECT_EQ(object.signed_1bit, (s64)object.signed_1bit);
EXPECT_EQ(object.flag, (bool)object.flag);
// Now make sure the value is indeed correct
EXPECT_EQ(val, object.full_u64);
@ -91,6 +95,7 @@ TEST(BitField, Read)
EXPECT_EQ(((s64)(object.hex << 52)) >> 61, object.regular_field_signed);
EXPECT_EQ(((s64)(object.hex << 30)) >> 60, object.at_dword_boundary);
EXPECT_EQ(((object.hex >> 15) & 1) ? -1 : 0, object.signed_1bit);
EXPECT_EQ((bool)object.flag, ((object.hex >> 63) & 1));
}
}
@ -122,6 +127,10 @@ TEST(BitField, Assignment)
// Assignment from other BitField
object.at_dword_boundary = object.regular_field_signed;
EXPECT_EQ(object.regular_field_signed, object.at_dword_boundary);
// Assignment to field of a type with a size smaller than the underlying type
object.flag = (val & 2);
EXPECT_EQ(object.flag, (val & 2) != 0);
}
}
@ -165,5 +174,9 @@ TEST(BitField, Alignment)
// Assignment from other BitField
object.at_dword_boundary = object.regular_field_signed;
EXPECT_EQ(object.regular_field_signed, object.at_dword_boundary);
// Assignment to field of a type with a size smaller than the underlying type
object.flag = (val & 2);
EXPECT_EQ(object.flag, (val & 2) != 0);
}
}