| // 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 {}) | |
| }) | |
| } | |
| } |