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author | Mike Buland <eichlan@xagasoft.com> | 2007-04-10 13:43:05 +0000 |
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committer | Mike Buland <eichlan@xagasoft.com> | 2007-04-10 13:43:05 +0000 |
commit | 79ee50a1cf4415e214298bf696aa3fc44e308d02 (patch) | |
tree | db6ddd49e0671f1c9a8f72147b1e3314182e96e7 | |
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).
-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 | |||