Support pattern matching

[DartBot]

This issue was originally filed by [email protected]

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What steps will clearly show the issue / need for enhancement?

1. Support of pattern matching (à la Scala/Ocaml/...)
2. Add a match keyword
3. Look at this POC https://code.google.com/p/dart-pattern-matching/

This answer sums up the advantages of having this (instead of just if/switch) http://stackoverflow.com/a/21355296/505810

Also this:

• It Allows to match on any sort of data with a first-match policy
• It meets a functional logic: each case statement returns a value and the whole match statement is virtually a function that returns the matching case value.

[lrhn]

Added Area-Language, Triaged labels.

[DartBot]

This comment was originally written by @zoechi

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looks like a dup of http://dartbug.com/2949

[DartBot]

This comment was originally written by [email protected]

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And what's that label for (on the possible dup) "-Oldschool-Milestone-Later"

[DartBot]

This comment was originally written by @zoechi

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I don't know. I just had the feeling that I already saw such a request, looked it up and added the link so others don't have to do the search again.
I'm also curious what this label means.

[DartBot]

This comment was originally written by [email protected]

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Ok... But yes the request looks pretty similar indeed.

[gbracha]

Added Duplicate label.
Marked as being merged into #2949.