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//! Parse options parameter to `Regexp#initialize` and `Regexp::compile`.

use super::Options;
use crate::extn::prelude::*;

impl ConvertMut<Value, Options> for Artichoke {
    fn convert_mut(&mut self, value: Value) -> Options {
        // If options is an Integer, it should be one or more of the constants
        // Regexp::EXTENDED, Regexp::IGNORECASE, and Regexp::MULTILINE, logically
        // or-ed together. Otherwise, if options is not nil or false, the regexp
        // will be case insensitive.
        if let Ok(options) = value.implicitly_convert_to_int(self) {
            Options::from(options)
        } else if let Ok(options) = value.try_into::<Option<bool>>(self) {
            Options::from(options)
        } else if let Ok(options) = value.try_into_mut::<&[u8]>(self) {
            Options::from(options)
        } else {
            Options::with_ignore_case()
        }
    }
}