Creating an enum from its name not value





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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 =  ...





enums perl6







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 =  ...





    enums perl6







    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 =  ...





      enums perl6







      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




      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
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          oldest

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          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
            4 hours ago












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          2 Answers
          2






          active

          oldest

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          2 Answers
          2






          active

          oldest

          votes









          active

          oldest

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          active

          oldest

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          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
            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
            4 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
            4 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
            4 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
          4 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
          4 hours ago


















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