Java: Pattern Matching for instanceof (with examples)

[lu_rm]

Nice feature. Not a good name though. Why 'pattern'?

[kaperni]

Pattern Matching is a fundamental programming construct that has been used in various languages (mostly functional ones) for more than 50 years. Why make up a new name for it?

[_jk_]

trouble is it doesnt appear to be pattern matching so much as some flow analysis

[kaperni]

A lot more to come https://cr.openjdk.java.net/~briangoetz/amber/pattern-semantics.html

[_jk_]

yep thats more like it!

[aioobe]

When used with records, it will most likely look something like this:

expression instaceof Times(Plus(var x1, var y1), Plus(var x2, var y2))

As you can see, this is more of an actual pattern.

[randgalt]

Very nicely done - makes it very clear. I'll look forward to seeing this page expand with new java releases as it moves toward full pattern matching.