3.1 Target language selection

Propane determines the target output language from the extension of the output file name given on the command line:

• .c selects the C target. A header file with a .h extension is generated alongside the implementation file.
• .cc, .cpp, or .cxx selects the C++ target. A header file with a .h extension is generated alongside the implementation file.
• .d selects the D target.
• .rs selects the Rust target.

Propane reports an error if the target language cannot be determined from the output file name.