generate list of all variants with `target_spec_enum`

This helps us avoid the hardcoded lists elsewhere.

2 files changed, 12 insertions, 27 deletions

diff --git a/compiler/rustc_target/src/lib.rs b/compiler/rustc_target/src/lib.rs
index b3fe1fffcce..8c6a77cba8b 100644
--- a/compiler/rustc_target/src/lib.rs
+++ b/compiler/rustc_target/src/lib.rs
@@ -76,10 +76,10 @@ fn find_relative_libdir(sysroot: &Path) -> std::borrow::Cow<'static, str> {
 macro_rules! target_spec_enum {
     (
         $( #[$attr:meta] )*
-        pub enum $name:ident {
+        pub enum $Name:ident {
             $(
                 $( #[$variant_attr:meta] )*
-                $variant:ident = $string:literal,
+                $Variant:ident = $string:literal,
             )*
         }
         parse_error_type = $parse_error_type:literal;
@@ -87,20 +87,20 @@ macro_rules! target_spec_enum {
         $( #[$attr] )*
         #[derive(Clone, Copy, PartialEq, Eq, Hash, Debug, PartialOrd, Ord)]
         #[derive(schemars::JsonSchema)]
-        pub enum $name {
+        pub enum $Name {
             $(
                 $( #[$variant_attr] )*
                 #[serde(rename = $string)] // for JSON schema generation only
-                $variant,
+                $Variant,
             )*
         }
 
-        impl FromStr for $name {
+        impl FromStr for $Name {
             type Err = String;
 
             fn from_str(s: &str) -> Result<Self, Self::Err> {
                 Ok(match s {
-                    $( $string => Self::$variant, )*
+                    $( $string => Self::$Variant, )*
                     _ => {
                         let all = [$( concat!("'", $string, "'") ),*].join(", ");
                         return Err(format!("invalid {}: '{s}'. allowed values: {all}", $parse_error_type));
@@ -109,24 +109,25 @@ macro_rules! target_spec_enum {
             }
         }
 
-        impl $name {
+        impl $Name {
+            pub const ALL: &'static [$Name] = &[ $( $Name::$Variant, )* ];
             pub fn desc(&self) -> &'static str {
                 match self {
-                    $( Self::$variant => $string, )*
+                    $( Self::$Variant => $string, )*
                 }
             }
         }
 
-        impl crate::json::ToJson for $name {
+        impl crate::json::ToJson for $Name {
             fn to_json(&self) -> crate::json::Json {
                 self.desc().to_json()
             }
         }
 
-        crate::json::serde_deserialize_from_str!($name);
+        crate::json::serde_deserialize_from_str!($Name);
 
 
-        impl std::fmt::Display for $name {
+        impl std::fmt::Display for $Name {
             fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
                 f.write_str(self.desc())
             }
diff --git a/compiler/rustc_target/src/spec/mod.rs b/compiler/rustc_target/src/spec/mod.rs
index 07fb1ce63f7..f705af52bd8 100644
--- a/compiler/rustc_target/src/spec/mod.rs
+++ b/compiler/rustc_target/src/spec/mod.rs
@@ -854,10 +854,6 @@ impl PanicStrategy {
             PanicStrategy::Abort => sym::abort,
         }
     }
-
-    pub const fn all() -> [Symbol; 2] {
-        [Self::Abort.desc_symbol(), Self::Unwind.desc_symbol()]
-    }
 }
 
 crate::target_spec_enum! {
@@ -974,18 +970,6 @@ impl RelocModel {
             RelocModel::RopiRwpi => sym::ropi_rwpi,
         }
     }
-
-    pub const fn all() -> [Symbol; 7] {
-        [
-            RelocModel::Static.desc_symbol(),
-            RelocModel::Pic.desc_symbol(),
-            RelocModel::Pie.desc_symbol(),
-            RelocModel::DynamicNoPic.desc_symbol(),
-            RelocModel::Ropi.desc_symbol(),
-            RelocModel::Rwpi.desc_symbol(),
-            RelocModel::RopiRwpi.desc_symbol(),
-        ]
-    }
 }
 
 crate::target_spec_enum! {