mat-clockwork-cron 2.1.0

A cron expression parser that's safe to use in the Solana runtime
Documentation 
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use crate::ordinal::*;

#[derive(Debug, PartialEq)]
pub enum Specifier {
    All,
    Point(Ordinal),
    Range(Ordinal, Ordinal),
    NamedRange(String, String),
}

// Separating out a root specifier allows for a higher tiered specifier, allowing us to achieve
// periods with base values that are more advanced than an ordinal:
// - all: '*/2'
// - range: '10-2/2'
// - named range: 'Mon-Thurs/2'
//
// Without this separation we would end up with invalid combinations such as 'Mon/2'
#[derive(Debug, PartialEq)]
pub enum RootSpecifier {
    Specifier(Specifier),
    Period(Specifier, u32),
    NamedPoint(String),
}

impl From<Specifier> for RootSpecifier {
    fn from(specifier: Specifier) -> Self {
        Self::Specifier(specifier)
    }
}