Enum grammar

parser/src/grammar.pest

@@ -37,7 +37,17 @@ class_decl = {
 
 // ================= TOP LEVEL =================
 
-top_level = { (attributes ~ (import | function_decl | struct_decl | class_decl | mod_package)) | mod_attribute }
+enum_named  = { identifier }
+enum_tuple  = { identifier ~ tuple_type }
+enum_struct = { identifier ~ "{" ~ field_list ~ "}" }
+
+enum_field = _{ enum_tuple | enum_struct | enum_named }
+
+enum_fields = _{ enum_field ~ ("," ~ enum_field)* ~ ","? }
+
+enum_decl = { export? ~ "enum" ~ identifier ~ "{" ~ enum_fields ~ "}" }
+
+top_level = { (attributes ~ (import | function_decl | struct_decl | enum_decl | class_decl | mod_package)) | mod_attribute }
 
 attribute = {
     "#" ~ "[" ~ meta ~ "]"

test/src/my_class.mist

@@ -9,3 +9,9 @@ class MyClass {
         println!("{}", self.message);
     }
 }
+
+enum MyEnum {
+    Named,
+    Tuple(i32, String),
+    Struct { i32 x }
+}