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
asked 4 hours ago
guifaguifa
245111
add a comment |
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
asked 4 hours ago
guifaguifa
245111
add a comment |
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
asked 4 hours ago
guifaguifa
245111
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
asked 4 hours ago
guifaguifa
245111
asked 4 hours ago
guifaguifa
245111
asked 4 hours ago
guifaguifa
245111
asked 4 hours ago
guifaguifa
245111
asked 4 hours ago
guifaguifa
245111
245111
add a comment |
add a comment |
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;
answered 4 hours ago
ugexeugexe
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
add a comment |
5
You can treat it as a Hash:
my $c = NATO::{$x};
answered 4 hours ago
Curt TilmesCurt Tilmes
2,2941721
Ah, I needed the double colon. I definitely had tried just using theNATO{$x}to no avail. Thanks for a great alternate answer (it's longer than @ugexe 's, but for situations where::($x)won't make it obvious what's going on,Foo::{$x}will make it crystal clear.
– guifa
4 hours ago
add a comment |
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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;
answered 4 hours ago
ugexeugexe
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
add a comment |
5
You can use indirect name lookup:
enum NATO (:alpha<A>, :bravo<B>, :charlie<C>);
my $x = 'charlie';
my $c = ::($x);
say $c.value;
answered 4 hours ago
ugexeugexe
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
add a comment |
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;
answered 4 hours ago
ugexeugexe
2,7571529
You can use indirect name lookup:
enum NATO (:alpha<A>, :bravo<B>, :charlie<C>);
my $x = 'charlie';
my $c = ::($x);
say $c.value;
answered 4 hours ago
ugexeugexe
2,7571529
answered 4 hours ago
ugexeugexe
2,7571529
answered 4 hours ago
ugexeugexe
2,7571529
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
add a comment |
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
add a comment |
5
You can treat it as a Hash:
my $c = NATO::{$x};
answered 4 hours ago
Curt TilmesCurt Tilmes
2,2941721
Ah, I needed the double colon. I definitely had tried just using theNATO{$x}to no avail. Thanks for a great alternate answer (it's longer than @ugexe 's, but for situations where::($x)won't make it obvious what's going on,Foo::{$x}will make it crystal clear.
– guifa
4 hours ago
add a comment |
5
You can treat it as a Hash:
my $c = NATO::{$x};
answered 4 hours ago
Curt TilmesCurt Tilmes
2,2941721
Ah, I needed the double colon. I definitely had tried just using theNATO{$x}to no avail. Thanks for a great alternate answer (it's longer than @ugexe 's, but for situations where::($x)won't make it obvious what's going on,Foo::{$x}will make it crystal clear.
– guifa
4 hours ago
add a comment |
5
5
5
You can treat it as a Hash:
my $c = NATO::{$x};
answered 4 hours ago
Curt TilmesCurt Tilmes
2,2941721
You can treat it as a Hash:
my $c = NATO::{$x};
answered 4 hours ago
Curt TilmesCurt Tilmes
2,2941721
answered 4 hours ago
Curt TilmesCurt Tilmes
2,2941721
answered 4 hours ago
Curt TilmesCurt Tilmes
2,2941721
answered 4 hours ago
Curt TilmesCurt Tilmes
2,2941721
2,2941721
Ah, I needed the double colon. I definitely had tried just using theNATO{$x}to no avail. Thanks for a great alternate answer (it's longer than @ugexe 's, but for situations where::($x)won't make it obvious what's going on,Foo::{$x}will make it crystal clear.
– guifa
4 hours ago
add a comment |
Ah, I needed the double colon. I definitely had tried just using theNATO{$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
add a comment |
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