projects / OpenSPARC-T2-SAM / blame
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| 129 | .\" ======================================================================== | |
| 130 | .\" | |
| 131 | .IX Title "B::Showlex 3" | |
| 132 | .TH B::Showlex 3 "2001-09-21" "perl v5.8.8" "Perl Programmers Reference Guide" | |
| 133 | .SH "NAME" | |
| 134 | B::Showlex \- Show lexical variables used in functions or files | |
| 135 | .SH "SYNOPSIS" | |
| 136 | .IX Header "SYNOPSIS" | |
| 137 | .Vb 1 | |
| 138 | \& perl -MO=Showlex[,-OPTIONS][,SUBROUTINE] foo.pl | |
| 139 | .Ve | |
| 140 | .SH "DESCRIPTION" | |
| 141 | .IX Header "DESCRIPTION" | |
| 142 | When a comma-separated list of subroutine names is given as options, Showlex | |
| 143 | prints the lexical variables used in those subroutines. Otherwise, it prints | |
| 144 | the file-scope lexicals in the file. | |
| 145 | .SH "EXAMPLES" | |
| 146 | .IX Header "EXAMPLES" | |
| 147 | Traditional form: | |
| 148 | .PP | |
| 149 | .Vb 13 | |
| 150 | \& $ perl -MO=Showlex -e 'my ($i,$j,$k)=(1,"foo")' | |
| 151 | \& Pad of lexical names for comppadlist has 4 entries | |
| 152 | \& 0: SPECIAL #1 &PL_sv_undef | |
| 153 | \& 1: PVNV (0x9db0fb0) $i | |
| 154 | \& 2: PVNV (0x9db0f38) $j | |
| 155 | \& 3: PVNV (0x9db0f50) $k | |
| 156 | \& Pad of lexical values for comppadlist has 5 entries | |
| 157 | \& 0: SPECIAL #1 &PL_sv_undef | |
| 158 | \& 1: NULL (0x9da4234) | |
| 159 | \& 2: NULL (0x9db0f2c) | |
| 160 | \& 3: NULL (0x9db0f44) | |
| 161 | \& 4: NULL (0x9da4264) | |
| 162 | \& -e syntax OK | |
| 163 | .Ve | |
| 164 | .PP | |
| 165 | New-style form: | |
| 166 | .PP | |
| 167 | .Vb 7 | |
| 168 | \& $ perl -MO=Showlex,-newlex -e 'my ($i,$j,$k)=(1,"foo")' | |
| 169 | \& main Pad has 4 entries | |
| 170 | \& 0: SPECIAL #1 &PL_sv_undef | |
| 171 | \& 1: PVNV (0xa0c4fb8) "$i" = NULL (0xa0b8234) | |
| 172 | \& 2: PVNV (0xa0c4f40) "$j" = NULL (0xa0c4f34) | |
| 173 | \& 3: PVNV (0xa0c4f58) "$k" = NULL (0xa0c4f4c) | |
| 174 | \& -e syntax OK | |
| 175 | .Ve | |
| 176 | .PP | |
| 177 | New form, no specials, outside O framework: | |
| 178 | .PP | |
| 179 | .Vb 6 | |
| 180 | \& $ perl -MB::Showlex -e \e | |
| 181 | \& 'my ($i,$j,$k)=(1,"foo"); B::Showlex::compile(-newlex,-nosp)->()' | |
| 182 | \& main Pad has 4 entries | |
| 183 | \& 1: PVNV (0x998ffb0) "$i" = IV (0x9983234) 1 | |
| 184 | \& 2: PVNV (0x998ff68) "$j" = PV (0x998ff5c) "foo" | |
| 185 | \& 3: PVNV (0x998ff80) "$k" = NULL (0x998ff74) | |
| 186 | .Ve | |
| 187 | .PP | |
| 188 | Note that this example shows the values of the lexicals, whereas the other | |
| 189 | examples did not (as they're compile-time only). | |
| 190 | .Sh "\s-1OPTIONS\s0" | |
| 191 | .IX Subsection "OPTIONS" | |
| 192 | The \f(CW\*(C`\-newlex\*(C'\fR option produces a more readable \f(CW\*(C`name => value\*(C'\fR format, | |
| 193 | and is shown in the second example above. | |
| 194 | .PP | |
| 195 | The \f(CW\*(C`\-nosp\*(C'\fR option eliminates reporting of SPECIALs, such as \f(CW\*(C`0: SPECIAL | |
| 196 | #1 &PL_sv_undef\*(C'\fR above. Reporting of SPECIALs can sometimes overwhelm | |
| 197 | your declared lexicals. | |
| 198 | .SH "SEE ALSO" | |
| 199 | .IX Header "SEE ALSO" | |
| 200 | \&\f(CW\*(C`B::Showlex\*(C'\fR can also be used outside of the O framework, as in the third | |
| 201 | example. See \f(CW\*(C`B::Concise\*(C'\fR for a fuller explanation of reasons. | |
| 202 | .SH "TODO" | |
| 203 | .IX Header "TODO" | |
| 204 | Some of the reported info, such as hex addresses, is not particularly | |
| 205 | valuable. Other information would be more useful for the typical | |
| 206 | programmer, such as line\-numbers, pad-slot reuses, etc.. Given this, | |
| 207 | \&\-newlex isnt a particularly good flag\-name. | |
| 208 | .SH "AUTHOR" | |
| 209 | .IX Header "AUTHOR" | |
| 210 | Malcolm Beattie, \f(CW\*(C`mbeattie@sable.ox.ac.uk\*(C'\fR |