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8.167. Opcode
Permits
defining an operator mask (opmask) 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 (opname) or negated name
Name of operator, usually lowercase. Prefixing the name with an
exclamation mark (!) removes it from the
accumulated set of operations.
set (opset)
Operator set. Binary string holding a set of zero or more operators.tag name (optag) or negated tag
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 Opcode module's manpage 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
8.167.1. Functions
All the following functions can be exported.
| define_optag |
define_optag (optag, opset)
Defines optag as symbolic name for the set
opset.
| empty_opset |
empty_opset
Returns an empty opset.
| full_opset |
full_opset
Returns an opset that includes all operators.
| invert_opset |
invert_opset (opset)
Returns an opset that is the inverse of
opset.
| opcodes |
opcodes
In scalar context, returns the number of opcodes in this version of
Perl.
| opdesc |
opdesc (op, ...)
Takes list of operator names and returns the corresponding list
descriptions.
| opdump |
opdump ([pat])
Writes two-column list of operator names and descriptions to STDOUT.
If pat is specified, only lines matching
the (case-insensitive) pattern are output.
| opmask |
opmask
Returns an opset corresponding to the current opmask.
| opmask_add |
opmask_add (opset)
Adds opset to the current opmask.
| opset |
opset (op, ...)
Returns an opset containing the listed operators.
| opset_to_hex |
opset_to_hex (opset)
Returns string representation of opset.
| opset_to_ops |
opset_to_ops (opset)
Returns list of operator names corresponding to the operators in the
set opset.
| verify_opset |
verify_opset (opset[, ...])
Returns true if opset appears to be a
valid opset, else returns false. croak s instead of
returning false if optional second parameter is true.
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| 8.166. ODBM_File |  | 8.168. ops |
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