Representing source code in a generic input format is crucial to automate
software engineering tasks, e.g., applying machine learning algorithms to
extract information. Visualizing code representations can further enable human
experts to gain an intuitive insight into the code. Unfortunately, as of today,
there is no universal tool that can simultaneously visualise different types of
code representations. In this paper, we introduce a tool, CodeLens, which
provides a visual interaction environment that supports various representation
methods and helps developers understand and explore them. CodeLens is designed
to support multiple programming languages, such as Java, Python, and
JavaScript, and four types of code representations, including sequence of
tokens, abstract syntax tree (AST), data flow graph (DFG), and control flow
graph (CFG). By using CodeLens, developers can quickly visualize the specific
code representation and also obtain the represented inputs for models of code.
The Web-based interface of CodeLens is available at this http URL
The demonstration video can be found at this http URL

代码表示和可视化工具 CodeLens 支持多种编程语言的源代码，具备多种代码表示方法，并提供了可视化交互界面和模型输入展示功能。