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| author | Mike Buland <eichlan@xagasoft.com> | 2007-04-10 13:43:05 +0000 |
|---|---|---|
| committer | Mike Buland <eichlan@xagasoft.com> | 2007-04-10 13:43:05 +0000 |
| commit | 79ee50a1cf4415e214298bf696aa3fc44e308d02 (patch) | |
| tree | db6ddd49e0671f1c9a8f72147b1e3314182e96e7 /src | |
| parent | 531761d77331915b3e6495d10e03191ba10c04d2 (diff) | |
| download | libbu++-79ee50a1cf4415e214298bf696aa3fc44e308d02.tar.gz libbu++-79ee50a1cf4415e214298bf696aa3fc44e308d02.tar.bz2 libbu++-79ee50a1cf4415e214298bf696aa3fc44e308d02.tar.xz libbu++-79ee50a1cf4415e214298bf696aa3fc44e308d02.zip | |
David had it half right...to make it work like something that's actually a const
pointer he's right, the pointer needs to be rebindable, but for a:
const int *p;
p can be changed, but not what p points to. I've added the rest of the
operators in sptr that should accomplish this, and a test that actually tests
the correctness of SPtr used this way against a normal pointer, both tests
check out 100%, hopefully this dosen't break anything, but if it should act like
a pointer, this is how to do it. (I totally forgot that const pointers were
rebindable).
Diffstat (limited to 'src')
| -rw-r--r-- | src/sptr.h | 14 | ||||
| -rw-r--r-- | src/tests/constsptr2.cpp | 30 |
2 files changed, 42 insertions, 2 deletions
| @@ -45,16 +45,26 @@ public: | |||
| 45 | return *pRefCnt; | 45 | return *pRefCnt; |
| 46 | } | 46 | } |
| 47 | 47 | ||
| 48 | T *operator->() const | 48 | const T *operator->() const |
| 49 | { | 49 | { |
| 50 | return pData; | 50 | return pData; |
| 51 | } | 51 | } |
| 52 | 52 | ||
| 53 | T *operator*() const | 53 | const T &operator*() const |
| 54 | { | ||
| 55 | return *pData; | ||
| 56 | } | ||
| 57 | |||
| 58 | T *operator->() | ||
| 54 | { | 59 | { |
| 55 | return pData; | 60 | return pData; |
| 56 | } | 61 | } |
| 57 | 62 | ||
| 63 | T &operator*() | ||
| 64 | { | ||
| 65 | return *pData; | ||
| 66 | } | ||
| 67 | |||
| 58 | SPtr<T> operator=( const SPtr<T> &src ) | 68 | SPtr<T> operator=( const SPtr<T> &src ) |
| 59 | { | 69 | { |
| 60 | decCount(); | 70 | decCount(); |
diff --git a/src/tests/constsptr2.cpp b/src/tests/constsptr2.cpp new file mode 100644 index 0000000..8ccb20c --- /dev/null +++ b/src/tests/constsptr2.cpp | |||
| @@ -0,0 +1,30 @@ | |||
| 1 | #include "sptr.h" | ||
| 2 | |||
| 3 | void nonsptr() | ||
| 4 | { | ||
| 5 | int a = 5; | ||
| 6 | int b = 10; | ||
| 7 | const int *p = &a; | ||
| 8 | p = &b; | ||
| 9 | printf("p = %d\n", (*p) ); | ||
| 10 | //(*p)++; | ||
| 11 | } | ||
| 12 | |||
| 13 | void sptr() | ||
| 14 | { | ||
| 15 | int a = 5; | ||
| 16 | int b = 10; | ||
| 17 | const SPtr<int> p = new int(a); | ||
| 18 | p = new int(b); | ||
| 19 | printf("p = %d\n", (*p) ); | ||
| 20 | //(*p)++; | ||
| 21 | } | ||
| 22 | |||
| 23 | int main() | ||
| 24 | { | ||
| 25 | printf("Non-sptr:\n"); | ||
| 26 | nonsptr(); | ||
| 27 | printf("sptr:\n"); | ||
| 28 | sptr(); | ||
| 29 | } | ||
| 30 | |||
