<ul><li>Source code comes in different shapes and forms, and previous research has shown code to be more predictable than natural language.</li><li>The structure of code has been successfully used to improve the state-of-the-art on numerous tasks, such as code suggestion and code summarization.</li><li>The Structured Naturalness Hypothesis suggests that a structured view of code is also natural, and evidence is provided in the case of trees.</li><li>Naturalness signals in code can be employed for near state-of-the-art results on defect prediction, reducing the need for manual feature engineering.</li></ul>

Bringing Structure to Naturalness: On the Naturalness of ASTs

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