30 lines
685 B
Rust
30 lines
685 B
Rust
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use std::sync::OnceLock;
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use enum_iterator::{all, Sequence};
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use crate::Identifier;
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pub fn all_built_in_identifiers() -> impl Iterator<Item = BuiltInIdentifier> {
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all()
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}
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const OPTION: OnceLock<Identifier> = OnceLock::new();
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const NONE: OnceLock<Identifier> = OnceLock::new();
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#[derive(Sequence)]
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pub enum BuiltInIdentifier {
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Option,
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None,
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}
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impl BuiltInIdentifier {
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pub fn get(&self) -> &Identifier {
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match self {
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BuiltInIdentifier::Option => {
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return OPTION.get_or_init(|| Identifier::new("Option"));
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}
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BuiltInIdentifier::None => return NONE.get_or_init(|| Identifier::new("None")),
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}
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}
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}
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