Using Constant Regexps (The GNU Awk User’s Guide)

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6.1.2 Using Regular Expression Constants

Regular expression constants consist of text describing a regular expression enclosed in slashes (such as /the +answer/). This section describes how such constants work in POSIX awk and gawk, and then goes on to describe strongly typed regexp constants, which are a gawk extension.

• Standard Regexp Constants		Regexp constants in standard awk.
• Strong Regexp Constants		Strongly typed regexp constants.