file!(): expands to the current filename */ The source_file (loc.file) contains a bunch more information we could spit out if we wanted.

include! : parse the given file as an expr This is generally a bad idea because it’s going to behave unhygienically.

include_str!: read the given file, insert it as a literal string expr

line!(): expands to the current line number

Module rustc_builtin_macros::source_util

Functions