you can match a string by repeatedly taking derivatives for each character. when you’ve consumed the entire input, you check if the resulting regex accepts the empty string (is “nullable”). if yes, the original string matched.
Sultan of Rum, a kind of historian for Tamriel Rebuilt, joked that the project was aptly named because of how many times it has been rebuilt—partly because the tools the modders use to build the project have gotten better over time, rendering work done before those advances obsolete.，更多细节参见电影
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