As with all compiler switch variables, the value of this variable
can be t, nil, or a
function object that accepts four arguments and returns t or nil. The arguments
passed to the function will be the values of the safety, space, speed,
and debug optimization qualities, in that order. nil is equivalent to a function that always returns
nil and t to a
function that always returns t. When the
value is a function and we say t (or true) or
nil (or false) in the text below, we mean
that the function returns, respectively, t or
nil.
If true, code is generated that an object of undeclared type is of the correct type when it appears as the argument to specialized functions like svref and rplaca. Thus the argument to svref must be a simple vector and if this switch is true, code will check that (and give a meaningful error message). See Argument type for a specialized function example for an example. Note that generic has nothing to do with (CLOS) generic functions. The name way predates CLOS.
Initially true for speed less than 3 or safety greater than 1
See compiling.htm for information on the compiler.
The documentation is described in introduction.htm and the index is in index.htm.
Copyright (c) 1998-2000, Franz Inc. Berkeley, CA., USA. All rights reserved.
Created 2000.10.5.