Large language models (LLMs) have demonstrated remarkable capabilities in
code generation tasks. However, repository-level code generation presents
unique challenges, particularly due to the need to utilize information spread
across multiple files within a repository. Existing retrieval-based approaches
sometimes fall short as they are limited in obtaining a broader and deeper
repository context. In this paper, we present CatCoder, a novel code generation
framework designed for statically typed programming languages. CatCoder
enhances repository-level code generation by integrating relevant code and type
context. Specifically, it leverages static analyzers to extract type
dependencies and merges this information with retrieved code to create
comprehensive prompts for LLMs. To evaluate the effectiveness of CatCoder, we
adapt and construct benchmarks that include 199 Java tasks and 90 Rust tasks.
The results show that CatCoder outperforms the RepoCoder baseline by up to
17.35%, in terms of pass@k score. Furthermore, the generalizability of CatCoder
is assessed using various LLMs, including both code-specialized models and
general-purpose models. Our findings indicate consistent performance
improvements across all models, which underlines the practicality of CatCoder.

CatCoder 是一种新颖的代码生成框架，扩展了库级代码生成的能力，通过整合相关代码和类型上下文，利用静态分析器提取类型依赖并将其与检索到的代码合并，创建综合提示；实验证明 CatCoder 在各种 LLMs 中表现良好，提供了一致的性能改进。