There is growing interest in software migration as the development of
software and society. Manually migrating projects between languages is
error-prone and expensive. In recent years, researchers have begun to explore
automatic program translation using supervised deep learning techniques by
learning from large-scale parallel code corpus. However, parallel resources are
scarce in the programming language domain, and it is costly to collect
bilingual data manually. To address this issue, several unsupervised
programming translation systems are proposed. However, these systems still rely
on huge monolingual source code to train, which is very expensive. Besides,
these models cannot perform well for translating the languages that are not
seen during the pre-training procedure. In this paper, we propose SDA-Trans, a
syntax and domain-aware model for program translation, which leverages the
syntax structure and domain knowledge to enhance the cross-lingual transfer
ability. SDA-Trans adopts unsupervised training on a smaller-scale corpus,
including Python and Java monolingual programs. The experimental results on
function translation tasks between Python, Java, and C++ show that SDA-Trans
outperforms many large-scale pre-trained models, especially for unseen language
translation.

本文提出了一种语法和领域感知的程序翻译模型 SDA-Trans，利用语法结构和领域知识来增强跨语言转移能力，采用较小规模的无监督语料库进行训练，实验结果表明 SDA-Trans 在 Python、Java 和 C++ 之间的函数翻译任务上表现优异，尤其是对于需要翻译看不见语言的情况。