#scala
After matching a pattern with a given value, the guard (defined after the keyword if) is evaluated. If it returns true, the match succeeds; otherwise, it fails and the next pattern will be tried.
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Case Classes - Scala Documentationeyword and consisting of sequences of case Pattern => Body clauses.
The program above also defines a function isIdentityFun which checks if a given term corresponds to a simple identity function. This example uses deep patterns and guards. <span>After matching a pattern with a given value, the guard (defined after the keyword if) is evaluated. If it returns true, the match succeeds; otherwise, it fails and the next pattern will be tried.
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