+ /*
+ * Default constructor.
+ *
+ * If a class derived from NumberlikeArray knows at initializer time what size array
+ * it wants, it can call the first constructor listed above in an initializer.
+ *
+ * Otherwise, this default constructor will be implicitly invoked, pointing `blk' to
+ * `NULL', a fake zero-length block array. The derived class can allocate the desired
+ * array itself and overwrite `blk'; it need not `delete [] blk' first.
+ *
+ * This change fixes a memory leak reported by Milan Tomic on 2005.01.06.
+ * Integer-type-to-BigUnsigned (and BigInteger) conversion constructors have always
+ * allocated their own array of length 0 or 1 after seeing whether the input is zero.
+ * But when the NumberlikeArray transition occurred, these constructors contained an
+ * implicit initializer call to the old NumberlikeArray default constructor, which
+ * created a real `new'-allocated zero-length array. This array would then be lost,
+ * causing a small but annoying memory leak.
+ */
+ NumberlikeArray() : cap(0), len(0) {
+ blk = NULL;