Substitutions are allowed only within find/replace replacement patterns.
Character escapes and substitutions are the only special constructs recognized in a replacement pattern.
The following table shows how to define named and numbered replacement patterns:
Table B.8 | List of Substitutions |
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$1
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Substitutes the last substring matched by group number 1 (decimal). The second group is number 2 ($2), and so on.
For example, the replacement pattern a*$1b inserts the string a* followed by the substring matched by the first capturing group, if any, followed by the string b.
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$0
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Substitutes a copy of the entire match itself.
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$&
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Substitutes a copy of the entire match itself.
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$$
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Substitutes a single $ literal.
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Remark 1. | The * character is not recognized as a metacharacter within a replacement pattern. |
Remark 2. | $ patterns are not recognized within regular expression matching patterns. Within regular expressions, $ designates the end of the string. |