diff options
Diffstat (limited to 'gcc/is-a.h')
| -rw-r--r-- | gcc/is-a.h | 34 |
1 files changed, 17 insertions, 17 deletions
@@ -34,21 +34,21 @@ bool is_a <TYPE> (pointer) Suppose you have a symtab_node *ptr, AKA symtab_node *ptr. You can test whether it points to a 'derived' cgraph_node as follows. - if (is_a <cgraph_node> (ptr)) + if (is_a <cgraph_node *> (ptr)) .... -TYPE *as_a <TYPE> (pointer) +TYPE as_a <TYPE> (pointer) - Converts pointer to a TYPE*. + Converts pointer to a TYPE. You can just assume that it is such a node. - do_something_with (as_a <cgraph_node> *ptr); + do_something_with (as_a <cgraph_node *> *ptr); -TYPE *dyn_cast <TYPE> (pointer) +TYPE dyn_cast <TYPE> (pointer) - Converts pointer to TYPE* if and only if "is_a <TYPE> pointer". Otherwise, + Converts pointer to TYPE if and only if "is_a <TYPE> pointer". Otherwise, returns NULL. This function is essentially a checked down cast. This functions reduce compile time and increase type safety when treating a @@ -57,7 +57,7 @@ TYPE *dyn_cast <TYPE> (pointer) You can test and obtain a pointer to the 'derived' type in one indivisible operation. - if (cgraph_node *cptr = dyn_cast <cgraph_node> (ptr)) + if (cgraph_node *cptr = dyn_cast <cgraph_node *> (ptr)) .... As an example, the code change is from @@ -70,7 +70,7 @@ TYPE *dyn_cast <TYPE> (pointer) to - if (cgraph_node *cnode = dyn_cast <cgraph_node> (node)) + if (cgraph_node *cnode = dyn_cast <cgraph_node *> (node)) { .... } @@ -88,7 +88,7 @@ TYPE *dyn_cast <TYPE> (pointer) becomes - varpool_node *vnode = dyn_cast <varpool_node> (node); + varpool_node *vnode = dyn_cast <varpool_node *> (node); if (vnode && vnode->finalized) varpool_analyze_node (vnode); @@ -110,7 +110,7 @@ example, template <> template <> inline bool - is_a_helper <cgraph_node>::test (symtab_node *p) + is_a_helper <cgraph_node *>::test (symtab_node *p) { return p->type == SYMTAB_FUNCTION; } @@ -122,7 +122,7 @@ when needed may result in a crash. For example, template <> template <> inline bool - is_a_helper <cgraph_node>::cast (symtab_node *p) + is_a_helper <cgraph_node *>::cast (symtab_node *p) { return &p->x_function; } @@ -140,7 +140,7 @@ struct is_a_helper template <typename U> static inline bool test (U *p); template <typename U> - static inline T *cast (U *p); + static inline T cast (U *p); }; /* Note that we deliberately do not define the 'test' member template. Not @@ -154,10 +154,10 @@ struct is_a_helper template <typename T> template <typename U> -inline T * +inline T is_a_helper <T>::cast (U *p) { - return reinterpret_cast <T *> (p); + return reinterpret_cast <T> (p); } @@ -178,7 +178,7 @@ is_a (U *p) discussion above for when to use this function. */ template <typename T, typename U> -inline T * +inline T as_a (U *p) { gcc_checking_assert (is_a <T> (p)); @@ -189,13 +189,13 @@ as_a (U *p) the discussion above for when to use this function. */ template <typename T, typename U> -inline T * +inline T dyn_cast (U *p) { if (is_a <T> (p)) return is_a_helper <T>::cast (p); else - return static_cast <T *> (0); + return static_cast <T> (0); } #endif /* GCC_IS_A_H */ |