Add snake case lint note about keyword identifiers which cannot be raw

Skynoodle · Skynoodle · commit 750c52af7334 · 2021-01-02T15:46:41.000Z
diff --git a/compiler/rustc_lint/src/nonstandard_style.rs b/compiler/rustc_lint/src/nonstandard_style.rs
@@ -283,6 +283,7 @@ impl NonSnakeCase {
                             if sc_ident.name.can_be_raw() {
                                 ("rename the identifier or convert it to a snake case raw identifier", sc_ident.to_string())
                             } else {
+                                err.note(&format!("`{}` cannot be used as a raw identifier", sc));
                                 ("rename the identifier", String::new())
                             }
                         } else {
diff --git a/src/test/ui/lint/lint-non-snake-case-identifiers-suggestion-reserved.stderr b/src/test/ui/lint/lint-non-snake-case-identifiers-suggestion-reserved.stderr
@@ -60,6 +60,8 @@ error: variable `Super` should have a snake case name
    |
 LL |     let Super: usize = 0;
    |         ^^^^^ help: rename the identifier
+   |
+   = note: `super` cannot be used as a raw identifier
 
 error: aborting due to 4 previous errors; 2 warnings emitted
 

Original file line number	Diff line number	Diff line change
`@@ -283,6 +283,7 @@ impl NonSnakeCase {`
`283`	`283`	`if sc_ident.name.can_be_raw() {`
`284`	`284`	`("rename the identifier or convert it to a snake case raw identifier", sc_ident.to_string())`
`285`	`285`	`} else {`
	`286`	+ err.note(&format!("`{}` cannot be used as a raw identifier", sc));
`286`	`287`	`("rename the identifier", String::new())`
`287`	`288`	`}`
`288`	`289`	`} else {`
Original file line number	Diff line number	Diff line change
@@ -60,6 +60,8 @@ error: variable `Super` should have a snake case name
`60`	`60`	`\|`
`61`	`61`	`LL \| let Super: usize = 0;`
`62`	`62`	`\| ^^^^^ help: rename the identifier`
	`63`	`+ \|`
	`64`	+ = note: `super` cannot be used as a raw identifier
`63`	`65`
`64`	`66`	`error: aborting due to 4 previous errors; 2 warnings emitted`
`65`	`67`