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| author | Pratik Karki <predatoramigo@gmail.com> | 2018-02-28 16:17:52 +0545 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2018-02-28 16:17:52 +0545 |
| commit | 3b0a97df42f13beaf4c867412d1477bee501c515 (patch) | |
| tree | 2c796932886a9a09fef8dc8151ab11bdf7f20800 | |
| parent | a26d106ed72e7d4a391e73496cc65e0f7b559111 (diff) | |
| parent | 9999a30e045f59fe3347b8822f71fff32b3ffc27 (diff) | |
Merge pull request #3037 from twopoint718/master
[Standard ML/en] Add case expression to SML docs
| -rw-r--r-- | standard-ml.html.markdown | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/standard-ml.html.markdown b/standard-ml.html.markdown index 5db15b5c..b34f1c08 100644 --- a/standard-ml.html.markdown +++ b/standard-ml.html.markdown @@ -6,6 +6,7 @@ contributors: - ["David Pedersen", "http://lonelyproton.com/"] - ["James Baker", "http://www.jbaker.io/"] - ["Leo Zovic", "http://langnostic.inaimathi.ca/"] + - ["Chris Wilson", "http://sencjw.com/"] --- Standard ML is a functional programming language with type inference and some @@ -266,6 +267,16 @@ fun second_elem (x::y::xs) = y fun evenly_positioned_elems (odd::even::xs) = even::evenly_positioned_elems xs | evenly_positioned_elems [odd] = [] (* Base case: throw away *) | evenly_positioned_elems [] = [] (* Base case *) + +(* The case expression can also be used to pattern match and return a value *) +datatype temp = + C of real + | F of real + +fun temp_to_f t = + case t of + C x => x * (9.0 / 5.0) + 32.0 + | F x => x (* When matching on records, you must use their slot names, and you must bind every slot in a record. The order of the slots doesn't matter though. *) |