The document discusses Clang, a C language family front-end toolkit written in C++. Clang was created at LLVM.org in 2006 and can parse C, C++, and Objective-C code. It consists of several core components like the lexer, parser, semantic analyzer, and AST (abstract syntax tree) that allow it to read code and produce LLVM IR that can be optimized and run on different systems. Clang aims to provide
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