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