The GAWK Manual - Expression Patterns Go to the previous , next section. Expressions as Patterns Any awk expression is also valid as an awk pattern . The expression is reevaluated each time the rule is tested against a new input record. Comparison patterns are actually a special case of this.
Boolean patterns are also special cases of expression patterns.
A constant regexp as a pattern is also a special case of an expression pattern . Go to the previous , next section.