Once SWIG is run on the interface file, it produces a C or C++ file which is the wrapper.

They can also be customized if necessary. Typemaps can be applied globally to everything in the interface file or locally on a case by case basis. Typemaps are rules that specify how types are marshaled between the C code and the target language. Some of these directives are general and others are specific to the target language.Ĭentral to how SWIG functions is the typemap. SWIG has its own preprocessor system and many special directives to control how data, classes and functions are wrapped in the target language. In the interface file, the developer tells SWIG what to wrap and how. The code generation can be controlled by the developer in the SWIG interface file as well as through command line options. SWIG parses header files and generates code in a manner dependent on the target language. SWIG (Simplified Wrapper and Interface Generator) is a tool for wrapping C and C++ code in a variety of target languages, allowing C/C++ APIs to be used in other languages.

Swig software wrapper