(j3.2006) F2008, ALLOCATE with MOLD

[Tobias Burnus]

Hello,

does the Fortran 2008 draft FDIS (N1814) actually state anywhere what
MOLD= in the ALLOCATE statement actually does?

I only find

R627 alloc-opt  is  ERRMSG = errmsg-variable
                or  MOLD = source-expr
                or  SOURCE = source-expr
                or  STAT = stat-variable

and later on page 128, paragraph 8:

"If MOLD= appears and source-expr is a variable, its value need not be
defined."


Admittedly, the standard does write something about it: In the
"Introduction" (page xiii, paragraph 2, 5th item):

"A structure constructor can omit the value for an allocatable
component. SOURCE= in an ALLOCATE
statement can give an array variable the bounds as well as the value of
an expression. MOLD= in an ALLOCATE statement can give a polymorphic
variable the shape, type, and type parameters of an expression without
copying the value."

Is it really intended that only the introduction defines the behaviour?

Tobias