Constructs an empty table with at least `n` buckets, using `hf` as the hash function, `eql` as the key equality predicate, and `a` as the allocator.
Constructs an empty table with at least `n` buckets, using `hf` as the hash function, `eql` as the key equality predicate, and `a` as the allocator.构造一个至少包含n个桶的空表，使用hf作为哈希函数、eql作为键相等谓词、a作为分配器。
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Constructs an empty table with at least `n` buckets, using `hf` as the hash function, `eql` as the key equality predicate, and `a` as the allocator.构造一个至少包含n个桶的空表，使用hf作为哈希函数、eql作为键相等谓词、a作为分配器。