From: arne@vajhoej.dk   
      
   On 11/19/2025 11:12 AM, Dan Cross wrote:   
   > In article <10fig54$1n41a$3@dont-email.me>,   
   > Arne Vajhøj   wrote:   
   >> Option is in fashion in recent years.   
   >   
   > Algebraic data types have been used in functional languages   
   > since the 1970s, starting with the "Hope" language from   
   > Edinburgh.  ML took them from Hope and popularized them, and   
   > they leaked into Miranda, Haskell, and OCaml from there.  Now   
   > many languages support them; even C++ (`std::optional`).   
   >   
   > Hope was first described in a paper in 1980, but the work of   
   > course predated that.   
   >   
   > That makes them about as old as VMS, and older than Ada.  In   
   > other words, they've been "In Fashion" since the 70s, which as   
   > far as all things fashion goes, is a pretty good run;   
   > particularly considering some of the things that were popular in   
   > that decade.   
      
   I would not consider Haskell, OCaml to ever have been in fashion.   
      
   Scala 2.0 in 2006, Rust in 2012, Swift in 2014, Java 8 in 2014,   
   Python 3.5 in 2015 (only type hint!), C++ 17 are more mainstream   
   and more recent.   
      
   Arne   
      
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    * Origin: you cannot sedate... all the things you hate (1:229/2)