Embedded Matches

Option 'e' --> Output Embedded Matches. Normally QTGrep outputs only the first match found. QTGrep also has the capability of finding matches to multiple regular expressions embedded within an on-going match. For example, consider the contrived case of the following two expressions:

  init_(tags)
  n(it_t)

In scanning for matching strings, QTGrep will start matching the first expression first. As input scanning continues, QTGrep also matches the second expression while continuing the on-going first match. When the string match for the second expression is completed, the on-going match for the first expression is continued. When the match for the first expression is completed. The result is output. If this option is toggled on, then the match for the second expression is also output. If invoked with the 'M' and 'I' options,

 qtgrep -ReMIT -f testfile.exp testfile.txt

the output would be similar to that below:

    1E:   17I/  9L:      3R: init_tags
	    1E.1L.1C->22I/4L: tags
     2e:   18I/  5L:      3R: nit_t
	    2e.1L.1C->19I/4L: it_t
     1E:    6I/  9L:     14R: init_tags
	    1E.1L.1C->11I/4L: tags
     2e:    7I/  5L:     14R: nit_t
	    2e.1L.1C->8I/4L: it_t

Note the use of case, 'E' or 'e' to distinguish the primary and embedded match. The use of the 'D' option can be used to further highlight which expression has been matched in the context of the record.

Note that this option is only active for matching against regular expressions. Embedded keyword matches will not be found or reported. The 'R' option may be used to force the regular expression match mechanism if desired.

This is a local option and may be turned on or off for separate files as desired.

The corresponding long option is: --embedded-match=(on|off)

Incompatible Options Are:

W	Write Compiled Search Patterns
Z	File Preview