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//@ compile-flags: -g
extern crate issue_31702_1;
use std::collections::HashMap;
use issue_31702_1::U256;
pub struct Ethash {
engine_params: fn() -> Option<&'static Vec<u8>>,
u256_params: HashMap<String, U256>,
}
impl Ethash {
pub fn u256_param(&mut self, name: &str) -> U256 {
let engine = self.engine_params;
*self.u256_params.entry(name.to_owned()).or_insert_with(|| {
engine().map_or(U256::new(0u64), |_a| loop {})
})
}
}
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