On 4 July 2011 15:28, konica sarker wrote: > "A tree is a pointer type, but the object to which it points may be of > a variety of types" > > suppose i have a tree t; > can you help me, how to identify the object type of the tree? >From http://gcc.gnu.org/onlinedocs/gccint/Tree-overview.html "You can tell what kind of node a particular tree is by using the TREE_CODE macro." > what does the function TREE_TYPE() do? >From http://gcc.gnu.org/onlinedocs/gccint/Macros-and-Functions.html "Many trees store the type of an expression or declaration in this field." And from gcc/tree.h: /* In all nodes that are expressions, this is the data type of the expression. In POINTER_TYPE nodes, this is the type that the pointer points to. In ARRAY_TYPE nodes, this is the type of the elements. In VECTOR_TYPE nodes, this is the type of the elements. */ #define TREE_TYPE(NODE) __extension__ \ (*({__typeof (NODE) const __t = CONTAINS_STRUCT_CHECK (NODE, TS_TYPED); \ &__t->typed.type; }))
