sed: Programming Commands
1
1 3.6 Commands for 'sed' gurus
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1
1 In most cases, use of these commands indicates that you are probably
1 better off programming in something like 'awk' or Perl. But
1 occasionally one is committed to sticking with 'sed', and these commands
1 can enable one to write quite convoluted scripts.
1
1 ': LABEL'
1 [No addresses allowed.]
1
1 Specify the location of LABEL for branch commands. In all other
1 respects, a no-op.
1
1 'b LABEL'
1 Unconditionally branch to LABEL. The LABEL may be omitted, in
1 which case the next cycle is started.
1
1 't LABEL'
1 Branch to LABEL only if there has been a successful 's'ubstitution
1 since the last input line was read or conditional branch was taken.
1 The LABEL may be omitted, in which case the next cycle is started.
1