就是一个类似 map_with_wildcard<string, vector<string>> 的结构。比如如果已有{'abc': ['aa', 'ab'], 'adc': ['da', 'db']},那么查 'a*c' 的结果应该是 ['aa', 'ab', 'da', 'db']
map_with_wildcard<string, vector<string>>
{'abc': ['aa', 'ab'], 'adc': ['da', 'db']}
'a*c'
['aa', 'ab', 'da', 'db']
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