Add Ordering data-type definition to prelude known constructors.

crates/aiken-lang/src/ast.rs

@@ -145,6 +145,41 @@ pub struct TypeAlias<T> {
 pub type TypedDataType = DataType<Arc<Type>>;
 
 impl TypedDataType {
+    pub fn ordering() -> Self {
+        DataType {
+            constructors: vec![
+                RecordConstructor {
+                    location: Span::empty(),
+                    name: "Less".to_string(),
+                    arguments: vec![],
+                    doc: None,
+                    sugar: false,
+                },
+                RecordConstructor {
+                    location: Span::empty(),
+                    name: "Equal".to_string(),
+                    arguments: vec![],
+                    doc: None,
+                    sugar: false,
+                },
+                RecordConstructor {
+                    location: Span::empty(),
+                    name: "Greater".to_string(),
+                    arguments: vec![],
+                    doc: None,
+                    sugar: false,
+                },
+            ],
+            doc: None,
+            location: Span::empty(),
+            name: "Ordering".to_string(),
+            opaque: false,
+            parameters: vec![],
+            public: true,
+            typed_parameters: vec![],
+        }
+    }
+
     pub fn option(tipo: Arc<Type>) -> Self {
         DataType {
             constructors: vec![

crates/aiken-lang/src/builtins.rs

@@ -877,6 +877,16 @@ pub fn prelude_functions(id_gen: &IdGenerator) -> IndexMap<FunctionAccessKey, Ty
 pub fn prelude_data_types(id_gen: &IdGenerator) -> IndexMap<DataTypeKey, TypedDataType> {
     let mut data_types = IndexMap::new();
 
+    // Ordering
+    let ordering_data_type = TypedDataType::ordering();
+    data_types.insert(
+        DataTypeKey {
+            module_name: "".to_string(),
+            defined_type: "Ordering".to_string(),
+        },
+        ordering_data_type,
+    );
+
     // Option
     let option_data_type = TypedDataType::option(generic_var(id_gen.next()));
     data_types.insert(