There are three constructors for VMatrices. The default constructor takes a void argument. Note that since a VMatrix is a sub-class of a vdoub, the vdoub constructor is called first. The extra VMatrix elements are supplied next. The default constructor sets the name to 't', and allocates a 1x1 matrix.
The second form of the constructor is given in the code below:
VMatrix::VMatrix( const char *str, int rr, int cc):
vdoub( ((long )((long) rr)*((long) cc)) )
{
r=rr;
c=cc;
curvecind = 0;
Nameit( str );
signature = SIGNATURE;
}
The second line of this constructor calls the vdoub
constructor with a default vector length of rr*cc. The
casts avoid type promotion problems. The constructor sets
the name to the supplied string.
The third constructor is a copy constructor. This allows
statements like VMatrix c = b; to be used.
This creates the new matrix c, and then copies b into it.
The assignment may also be a function call, or repeated
operations. Matrix pointers can also be created by
functions such as VMatrix *Mat = new VMatrix;.
Note that the copy constructor calls cleanstack(), so
the stack is cleared after the constructor is called.
Thus, you must use Dispatch->Inclevel() and
Dispatch->Declevel() pairs in functions that call the
copy constructor.
The destructor first calls the destructor for the vdoub, returns, and sets the signature to zero.