Comments in Rust code follow the general C++ style of line (
/* ... */) comment forms. Nested block comments are supported.
Line comments beginning with exactly three slashes (
///), and block
/** ... */), are interpreted as a special syntax for
attributes. That is, they are equivalent to writing
#[doc="..."] around the body of the comment, i.e.,
/// Foo turns into
Line comments beginning with
//! and block comments
/*! ... */ are
doc comments that apply to the parent of the comment, rather than the item
that follows. That is, they are equivalent to writing
the body of the comment.
//! comments are usually used to document
modules that occupy a source file.
Non-doc comments are interpreted as a form of whitespace.