fn source_file_stem(path: &str) -> Option<String>Expand description
The stem of a standalone function’s source file: the topic an explicit
@rdname names to group the file’s functions on one page (see
StandaloneFragment). None for lib.rs / mod.rs, whose stems name
no page of their own.
"src/rust/zero_copy_tests.rs" → Some("zero_copy_tests")
"lib.rs" → None