error: expected expression, found keyword `else` --> $DIR/unused-doc-comments-edge-cases.rs:17:5 | LL | else { | ^^^^ expected expression error[E0658]: attributes on expressions are experimental --> $DIR/unused-doc-comments-edge-cases.rs:23:5 | LL | /// useless doc comment | ^^^^^^^^^^^^^^^^^^^^^^^ | = note: see issue #15701 for more information = help: add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable = help: `///` is for documentation comments. For a plain comment, use `//`. error: unused doc comment --> $DIR/unused-doc-comments-edge-cases.rs:6:9 | LL | /// useless doc comment | ^^^^^^^^^^^^^^^^^^^^^^^ LL | LL | _ => false, | ---------- rustdoc does not generate documentation for match arms | note: the lint level is defined here --> $DIR/unused-doc-comments-edge-cases.rs:1:9 | LL | #![deny(unused_doc_comments)] | ^^^^^^^^^^^^^^^^^^^ = help: use `//` for a plain comment error: unused doc comment --> $DIR/unused-doc-comments-edge-cases.rs:23:5 | LL | /// useless doc comment | ^^^^^^^^^^^^^^^^^^^^^^^ ... LL | num == 3 | --- rustdoc does not generate documentation for expressions | = help: use `//` for a plain comment error: unused doc comment --> $DIR/unused-doc-comments-edge-cases.rs:29:27 | LL | fn doc_comment_on_generic<#[doc = "x"] T>(val: T) {} | ^^^^^^^^^^^^ - rustdoc does not generate documentation for generic parameters | = help: use `//` for a plain comment error: unused doc comment --> $DIR/unused-doc-comments-edge-cases.rs:33:5 | LL | /// unused doc comment | ^^^^^^^^^^^^^^^^^^^^^^ LL | LL | / { LL | | let x = 12; LL | | } | |_____- rustdoc does not generate documentation for expressions | = help: use `//` for a plain comment error: unused doc comment --> $DIR/unused-doc-comments-edge-cases.rs:40:1 | LL | /// unused doc comment | ^^^^^^^^^^^^^^^^^^^^^^ LL | LL | / extern "C" { LL | | fn foo(); LL | | } | |_- rustdoc does not generate documentation for extern blocks | = help: use `//` for a plain comment error[E0308]: mismatched types --> $DIR/unused-doc-comments-edge-cases.rs:14:9 | LL | / if num == 3 { LL | | true | | ^^^^ expected `()`, found `bool` LL | | } | |_____- expected this to be `()` | help: you might have meant to return this value | LL | return true; | ++++++ + error: aborting due to 8 previous errors Some errors have detailed explanations: E0308, E0658. For more information about an error, try `rustc --explain E0308`.