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Creating an enum from its name not value



Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 23, 2019 at 23:30 UTC (7:30pm US/Eastern)
Data science time! April 2019 and salary with experience
The Ask Question Wizard is Live!What does the [Flags] Enum Attribute mean in C#?Cast int to enum in C#How can I represent an 'Enum' in Python?Create Generic method constraining T to an EnumHow do I enumerate an enum in C#?What is the preferred syntax for defining enums in JavaScript?How to get an enum value from a string value in Java?Get int value from enum in C#How to loop through all enum values in C#?Comparing Java enum members: == or equals()?



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7















Given the enumeration



enum NATO (:alpha<A>, :bravo<B>, :charlie<C>, :delta<D>);


it's possible to easily set a variable by literally typing one of the names, or by passing one of the values to the enum object:



my $a = alpha;
my $b = NATO('B');

say $a; # ↪︎ alpha
say $b; # ↪︎ bravo
say $a.value; # ↪︎ A
say $b.value; # ↪︎ B


Besides using EVAL and given a Str that corresponds to one of the enums, how could I create $c to be an enum value equivalent to charlie?



my $x = 'charlie';
my $c = ...









share|improve this question




























    7















    Given the enumeration



    enum NATO (:alpha<A>, :bravo<B>, :charlie<C>, :delta<D>);


    it's possible to easily set a variable by literally typing one of the names, or by passing one of the values to the enum object:



    my $a = alpha;
    my $b = NATO('B');

    say $a; # ↪︎ alpha
    say $b; # ↪︎ bravo
    say $a.value; # ↪︎ A
    say $b.value; # ↪︎ B


    Besides using EVAL and given a Str that corresponds to one of the enums, how could I create $c to be an enum value equivalent to charlie?



    my $x = 'charlie';
    my $c = ...









    share|improve this question
























      7












      7








      7








      Given the enumeration



      enum NATO (:alpha<A>, :bravo<B>, :charlie<C>, :delta<D>);


      it's possible to easily set a variable by literally typing one of the names, or by passing one of the values to the enum object:



      my $a = alpha;
      my $b = NATO('B');

      say $a; # ↪︎ alpha
      say $b; # ↪︎ bravo
      say $a.value; # ↪︎ A
      say $b.value; # ↪︎ B


      Besides using EVAL and given a Str that corresponds to one of the enums, how could I create $c to be an enum value equivalent to charlie?



      my $x = 'charlie';
      my $c = ...









      share|improve this question














      Given the enumeration



      enum NATO (:alpha<A>, :bravo<B>, :charlie<C>, :delta<D>);


      it's possible to easily set a variable by literally typing one of the names, or by passing one of the values to the enum object:



      my $a = alpha;
      my $b = NATO('B');

      say $a; # ↪︎ alpha
      say $b; # ↪︎ bravo
      say $a.value; # ↪︎ A
      say $b.value; # ↪︎ B


      Besides using EVAL and given a Str that corresponds to one of the enums, how could I create $c to be an enum value equivalent to charlie?



      my $x = 'charlie';
      my $c = ...






      enums perl6






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked 4 hours ago









      guifaguifa

      245111




      245111






















          2 Answers
          2






          active

          oldest

          votes


















          5














          You can use indirect name lookup:



          enum NATO (:alpha<A>, :bravo<B>, :charlie<C>);
          my $x = 'charlie';
          my $c = ::($x);
          say $c.value;





          share|improve this answer


















          • 1





            Thanks! (I figured with docs being offline it was a good time to start posting questions on SO)

            – guifa
            4 hours ago


















          5














          You can treat it as a Hash:



          my $c = NATO::$x;





          share|improve this answer























          • Ah, I needed the double colon. I definitely had tried just using the NATO$x to no avail. Thanks for a great alternate answer (it's longer than @ugexe 's, but for situations where ::($x) won't make it obvious what's going on, Foo::$x will make it crystal clear.

            – guifa
            3 hours ago











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          2 Answers
          2






          active

          oldest

          votes








          2 Answers
          2






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes









          5














          You can use indirect name lookup:



          enum NATO (:alpha<A>, :bravo<B>, :charlie<C>);
          my $x = 'charlie';
          my $c = ::($x);
          say $c.value;





          share|improve this answer


















          • 1





            Thanks! (I figured with docs being offline it was a good time to start posting questions on SO)

            – guifa
            4 hours ago















          5














          You can use indirect name lookup:



          enum NATO (:alpha<A>, :bravo<B>, :charlie<C>);
          my $x = 'charlie';
          my $c = ::($x);
          say $c.value;





          share|improve this answer


















          • 1





            Thanks! (I figured with docs being offline it was a good time to start posting questions on SO)

            – guifa
            4 hours ago













          5












          5








          5







          You can use indirect name lookup:



          enum NATO (:alpha<A>, :bravo<B>, :charlie<C>);
          my $x = 'charlie';
          my $c = ::($x);
          say $c.value;





          share|improve this answer













          You can use indirect name lookup:



          enum NATO (:alpha<A>, :bravo<B>, :charlie<C>);
          my $x = 'charlie';
          my $c = ::($x);
          say $c.value;






          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered 4 hours ago









          ugexeugexe

          2,7571529




          2,7571529







          • 1





            Thanks! (I figured with docs being offline it was a good time to start posting questions on SO)

            – guifa
            4 hours ago












          • 1





            Thanks! (I figured with docs being offline it was a good time to start posting questions on SO)

            – guifa
            4 hours ago







          1




          1





          Thanks! (I figured with docs being offline it was a good time to start posting questions on SO)

          – guifa
          4 hours ago





          Thanks! (I figured with docs being offline it was a good time to start posting questions on SO)

          – guifa
          4 hours ago













          5














          You can treat it as a Hash:



          my $c = NATO::$x;





          share|improve this answer























          • Ah, I needed the double colon. I definitely had tried just using the NATO$x to no avail. Thanks for a great alternate answer (it's longer than @ugexe 's, but for situations where ::($x) won't make it obvious what's going on, Foo::$x will make it crystal clear.

            – guifa
            3 hours ago















          5














          You can treat it as a Hash:



          my $c = NATO::$x;





          share|improve this answer























          • Ah, I needed the double colon. I definitely had tried just using the NATO$x to no avail. Thanks for a great alternate answer (it's longer than @ugexe 's, but for situations where ::($x) won't make it obvious what's going on, Foo::$x will make it crystal clear.

            – guifa
            3 hours ago













          5












          5








          5







          You can treat it as a Hash:



          my $c = NATO::$x;





          share|improve this answer













          You can treat it as a Hash:



          my $c = NATO::$x;






          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered 4 hours ago









          Curt TilmesCurt Tilmes

          2,2941721




          2,2941721












          • Ah, I needed the double colon. I definitely had tried just using the NATO$x to no avail. Thanks for a great alternate answer (it's longer than @ugexe 's, but for situations where ::($x) won't make it obvious what's going on, Foo::$x will make it crystal clear.

            – guifa
            3 hours ago

















          • Ah, I needed the double colon. I definitely had tried just using the NATO$x to no avail. Thanks for a great alternate answer (it's longer than @ugexe 's, but for situations where ::($x) won't make it obvious what's going on, Foo::$x will make it crystal clear.

            – guifa
            3 hours ago
















          Ah, I needed the double colon. I definitely had tried just using the NATO$x to no avail. Thanks for a great alternate answer (it's longer than @ugexe 's, but for situations where ::($x) won't make it obvious what's going on, Foo::$x will make it crystal clear.

          – guifa
          3 hours ago





          Ah, I needed the double colon. I definitely had tried just using the NATO$x to no avail. Thanks for a great alternate answer (it's longer than @ugexe 's, but for situations where ::($x) won't make it obvious what's going on, Foo::$x will make it crystal clear.

          – guifa
          3 hours ago

















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