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B::Op_private.3
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.\" -*- mode: troff; coding: utf-8 -*- .\" Automatically generated by Pod::Man 5.01 (Pod::Simple 3.43) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" \*(C` and \*(C' are quotes in nroff, nothing in troff, for use with C<>. .ie n \{\ . ds C` "" . ds C' "" 'br\} .el\{\ . ds C` . ds C' 'br\} .\" .\" Escape single quotes in literal strings from groff's Unicode transform. .ie \n(.g .ds Aq \(aq .el .ds Aq ' .\" .\" If the F register is >0, we'll generate index entries on stderr for .\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index .\" entries marked with X<> in POD. Of course, you'll have to process the .\" output yourself in some meaningful fashion. .\" .\" Avoid warning from groff about undefined register 'F'. .de IX .. .nr rF 0 .if \n(.g .if rF .nr rF 1 .if (\n(rF:(\n(.g==0)) \{\ . if \nF \{\ . de IX . tm Index:\\$1\t\\n%\t"\\$2" .. . if !\nF==2 \{\ . nr % 0 . nr F 2 . \} . \} .\} .rr rF .\" ======================================================================== .\" .IX Title "B::Op_private 3" .TH B::Op_private 3 2023-06-25 "perl v5.38.0" "Perl Programmers Reference Guide" .\" For nroff, turn off justification. Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH NAME B::Op_private \- OP op_private flag definitions .SH SYNOPSIS .IX Header "SYNOPSIS" .Vb 1 \& use B::Op_private; \& \& # flag details for bit 7 of OP_AELEM\*(Aqs op_private: \& my $name = $B::Op_private::bits{aelem}{7}; # OPpLVAL_INTRO \& my $value = $B::Op_private::defines{$name}; # 128 \& my $label = $B::Op_private::labels{$name}; # LVINTRO \& \& # the bit field at bits 5..6 of OP_AELEM\*(Aqs op_private: \& my $bf = $B::Op_private::bits{aelem}{6}; \& my $mask = $bf\->{bitmask}; # etc .Ve .SH DESCRIPTION .IX Header "DESCRIPTION" This module provides four global hashes: .PP .Vb 4 \& %B::Op_private::bits \& %B::Op_private::defines \& %B::Op_private::labels \& %B::Op_private::ops_using .Ve .PP which contain information about the per-op meanings of the bits in the op_private field. .ie n .SS %bits .el .SS \f(CW%bits\fP .IX Subsection "%bits" This is indexed by op name and then bit number (0..7). For single bit flags, it returns the name of the define (if any) for that bit: .PP .Vb 1 \& $B::Op_private::bits{aelem}{7} eq \*(AqOPpLVAL_INTRO\*(Aq; .Ve .PP For bit fields, it returns a hash ref containing details about the field. The same reference will be returned for all bit positions that make up the bit field; so for example these both return the same hash ref: .PP .Vb 2 \& $bitfield = $B::Op_private::bits{aelem}{5}; \& $bitfield = $B::Op_private::bits{aelem}{6}; .Ve .PP The general format of this hash ref is .PP .Vb 5 \& { \& # The bit range and mask; these are always present. \& bitmin => 5, \& bitmax => 6, \& bitmask => 0x60, \& \& # (The remaining keys are optional) \& \& # The names of any defines that were requested: \& mask_def => \*(AqOPpFOO_MASK\*(Aq, \& baseshift_def => \*(AqOPpFOO_SHIFT\*(Aq, \& bitcount_def => \*(AqOPpFOO_BITS\*(Aq, \& \& # If present, Concise etc will display the value with a \*(AqFOO=\*(Aq \& # prefix. If it equals \*(Aq\-\*(Aq, then Concise will treat the bit \& # field as raw bits and not try to interpret it. \& label => \*(AqFOO\*(Aq, \& \& # If present, specifies the names of some defines and the \& # display labels that are used to assign meaning to particu\- \& # lar integer values within the bit field; e.g. 3 is dis\- \& # played as \*(AqC\*(Aq. \& enum => [ qw( \& 1 OPpFOO_A A \& 2 OPpFOO_B B \& 3 OPpFOO_C C \& )], \& \& }; .Ve .ie n .SS %defines .el .SS \f(CW%defines\fP .IX Subsection "%defines" This gives the value of every \f(CW\*(C`OPp\*(C'\fR define, e.g. .PP .Vb 1 \& $B::Op_private::defines{OPpLVAL_INTRO} == 128; .Ve .ie n .SS %labels .el .SS \f(CW%labels\fP .IX Subsection "%labels" This gives the short display label for each define, as used by \f(CW\*(C`B::Concise\*(C'\fR and \f(CW\*(C`perl \-Dx\*(C'\fR, e.g. .PP .Vb 1 \& $B::Op_private::labels{OPpLVAL_INTRO} eq \*(AqLVINTRO\*(Aq; .Ve .PP If the label equals '\-', then Concise will treat the bit as a raw bit and not try to display it symbolically. .ie n .SS %ops_using .el .SS \f(CW%ops_using\fP .IX Subsection "%ops_using" For each define, this gives a reference to an array of op names that use the flag. .PP .Vb 1 \& @ops_using_lvintro = @{ $B::Op_private::ops_using{OPp_LVAL_INTRO} }; .Ve