What is .I extension used for?

Question

I was following this tutorial for learning how to create a Compiler in c++. But in the tutorial the author created tokens.I file for lexical analysis.

Can anyone please tell me what is .I extension used for ??

Thank You

Answer 1

The extension is actually .l (lowercase L), which is used for a "lex" file.

Answer 2

Intermediate files between the C preprocessor and the C compiler. All macros are expanded here.