Introduction
Welcome to the Clang Error Index. This resource provides detailed information about Clang compiler errors, including error codes, explanations, and code examples demonstrating the errors and how to fix them.
Clang is a C, C++, Objective-C, and Objective-C++ compiler which is designed to be compatible with GCC. Understanding compiler errors is essential for effective debugging and code improvement.
About Fuzzlang Project
Compilers have always played a critical role in software development and as languages grew more complex and diverse, so did Compilers and their interaction with the user. Yet, systematic research on the generation, classification, and reproduction of compilation errors remains limited. At the same time, compiler developers continuously add, remove, and modify compilation errors on a best-effort basis to keep up with user demand and the evolution of programming languages.
To offset this gap, Fuzzlang is an innovative framework that creates extensive datasets of compiler errors in isolation and as part of real-world code. Fuzzlang consists of the Fuzzlang Transformer, which generates diverse compilation errors given existing code, and Fuzzlang Agent, which leverages large language models (LLMs) to analyze and isolate complex errors from internal compiler tests.
Together, Fuzzlang was able to generate 5x as many independent error types as the DeepFix error database and thereby reach a coverage of 83.1% of all the error conditions LLVM/Clang's internal testing triggered.
Our evaluation shows that fine-tuning LLMs with the Fuzzlang dataset significantly improves their code repair performance. The precision of Llama3-8B increased from 37.22% to 93.97% and for GPT-4o-mini it grew from 72.29% to 96.70%. The coverage and performance results indicate that Fuzzlang provides effective tools to generate comprehensive datasets for advancing intelligent code repair and compiler diagnostics research.
About This Documentation Website
This website is built based on the code reproduced by the Fuzzlang Agent component of the Fuzzlang project. It serves as a practical application of the research, providing developers with a comprehensive resource for understanding and fixing Clang compiler errors.
The documentation focuses on Template errors as a proof of concept, demonstrating how structured error information can be presented in a user-friendly manner. Each error entry includes:
- The original error message and code
- Detailed explanation of why the error occurs
- Example code that reproduces the error
- Corrected code that fixes the issue
Key Features
Comprehensive Error Database
Detailed documentation of Clang template-related error messages, organized for easy reference.
Search Functionality
Powerful semantic search to find specific error messages or keywords across the entire error database.
Interactive Examples
Highlighted code examples showing both problematic code and the corrected version for each error.
Detailed Explanations
Clear, concise explanations of why each error occurs and the underlying C++ language rules.
How to Use This Documentation
You can navigate this documentation in several ways:
- Browse the Error List: Visit the Error List page to see all documented errors.
- Search for Specific Errors: Use the search box at the top of any page to find errors by code or description.
- Contribute: If you'd like to help improve this documentation, please check the Contributing page.