Error code E0753
An inner doc comment was used in an invalid context.
Erroneous code example:
fn foo() {} //! foo // ^ error! fn main() {}
Inner document can only be used before items. For example:
//! A working comment applied to the module! fn foo() { //! Another working comment! } fn main() {}
In case you want to document the item following the doc comment, you might want to use outer doc comment:
#![allow(unused)] fn main() { /// I am an outer doc comment #[doc = "I am also an outer doc comment!"] fn foo() { // ... } }