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// check-pass
// Test several functions can be used for constants
// 1. Vec::new()
// 2. String::new()
// 3. BTreeMap::new()
// 4. BTreeSet::new()
#![feature(const_btree_new)]
const MY_VEC: Vec<usize> = Vec::new();
const MY_STRING: String = String::new();
use std::collections::{BTreeMap, BTreeSet};
const MY_BTREEMAP: BTreeMap<u32, u32> = BTreeMap::new();
const MY_BTREESET: BTreeSet<u32> = BTreeSet::new();
fn main() {}
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