Add edition 2027

Author: johnhuichen

src/bin/main.rs

@@ -770,6 +770,7 @@ fn style_edition_from_style_edition_str(edition_str: &str) -> Result<StyleEditio
         "2018" => Ok(StyleEdition::Edition2018),
         "2021" => Ok(StyleEdition::Edition2021),
         "2024" => Ok(StyleEdition::Edition2024),
+        "2027" => Ok(StyleEdition::Edition2027),
         _ => Err(format_err!("Invalid value for `--style-edition`")),
     }
 }

src/config/options.rs

@@ -514,6 +514,11 @@ pub enum StyleEdition {
     #[unstable_variant]
     /// [Edition 2024]().
     Edition2024,
+    #[value = "2027"]
+    #[doc_hint = "2027"]
+    #[unstable_variant]
+    /// [Edition 2027]().
+    Edition2027,
 }
 
 impl From<StyleEdition> for rustc_span::edition::Edition {
@@ -523,6 +528,8 @@ impl From<StyleEdition> for rustc_span::edition::Edition {
             StyleEdition::Edition2018 => Self::Edition2018,
             StyleEdition::Edition2021 => Self::Edition2021,
             StyleEdition::Edition2024 => Self::Edition2024,
+            // TODO: should update to Edition2027 when it becomes available
+            StyleEdition::Edition2027 => Self::Edition2024,
         }
     }
 }

src/config/style_edition.rs

@@ -30,7 +30,13 @@ macro_rules! style_edition_default {
                     $crate::config::StyleEdition::Edition2015
                     | $crate::config::StyleEdition::Edition2018
                     | $crate::config::StyleEdition::Edition2021 => $default_2015,
-                    $crate::config::StyleEdition::Edition2024 => $default_2024,
+                    /**
+                    * TODO: should update macro when default_2027 becomes available
+                    * e.g. $crate::config::StyleEdition::Edition2024 => $default_2024,
+                    *      $crate::config::StyleEdition::Edition2027 => $default_2027,
+                    */
+                    $crate::config::StyleEdition::Edition2024
+                    | $crate::config::StyleEdition::Edition2027 => $default_2024,
                 }
             }
         }
@@ -52,6 +58,7 @@ mod test {
         assert_eq!(Unit::style_edition_default(StyleEdition::Edition2018), 100);
         assert_eq!(Unit::style_edition_default(StyleEdition::Edition2021), 100);
         assert_eq!(Unit::style_edition_default(StyleEdition::Edition2024), 100);
+        assert_eq!(Unit::style_edition_default(StyleEdition::Edition2027), 100);
     }
 
     #[test]
@@ -66,5 +73,6 @@ mod test {
 
         // style edition 2024
         assert_eq!(Unit::style_edition_default(StyleEdition::Edition2024), 50);
+        assert_eq!(Unit::style_edition_default(StyleEdition::Edition2027), 50);
     }
 }