Permits defining an operator mask so that any code containing
a masked opcode will not compile or execute when Perl next compiles any
code. Not usually used directly; for examples of Opcode's use, see the
ops pragma and the Safe module.
Valid opcodes are listed in the array
op_name in the file
opcode.h. Many Opcode functions and methods take lists of
operators, which are composed of elements. Each element can be a:
Name of operator, usually lowercase. Prefixing the name with an exclamation
!) removes it from the accumulated set of operations.
Operator set. Binary string holding a set of zero or more operators.
Operator tag name; refers to groups (or sets) of operators. Begins with
a colon (
:). Negated by prefixing with an exclamation mark
!). Several optags are predefined, including the following.
See the manpage for the Opcode module for the opcodes included in each tag.
:base_core :base_io :base_loop :base_math :base_mem :base_orig :browse :dangerous :default :filesys_open :filesys_read :filesys_write :others :ownprocess :still_to_be_decided :subprocess :sys_db