chore: update changelog

fix: Minor improvement to record update to use empty list instead of the null list from a record fields list.

CHANGELOG.md

@@ -12,6 +12,10 @@
 - **aiken-lang**: forced new line in formatter for assignments
 - **aiken-lang**: Incorrect parsing of generic type annotation prefixed with module
 - **aiken-lang**: Incorrect handling of comments at end of a file when newline not present
+- **aiken-lang**: Record update in code gen is now flexible enough to support fields being passed in any order.
+- **aiken-lang**: Record update now produces better uplc code then creating a record by the normal instantiation.
+- **aiken-lang**: Issue with Constructors being passed as functions to other function arguments was fixed.
+
 
 ## v1.0.6-alpha - 2023-05-17
 

crates/aiken-lang/src/gen_uplc.rs

@@ -206,6 +206,7 @@ impl<'a> CodeGenerator<'a> {
             version: (1, 0, 0),
             term,
         };
+
         program = aiken_optimize_and_intern(program);
 
         // This is very important to call here.
@@ -4777,11 +4778,16 @@ impl<'a> CodeGenerator<'a> {
             Air::RecordUpdate {
                 highest_index,
                 indices,
+                tipo,
                 ..
             } => {
                 self.needs_field_access = true;
                 let tail_name_prefix = "__tail_index";
 
+                let data_type = lookup_data_type_by_tipo(&self.data_types, &tipo)
+                    .unwrap_or_else(|| panic!("HOW DID YOU DO THIS ON BOOL OR VOID"));
+
+                let constructor_field_count = data_type.constructors[0].arguments.len();
                 let record = arg_stack.pop().unwrap();
 
                 let mut args = IndexMap::new();
@@ -4842,11 +4848,13 @@ impl<'a> CodeGenerator<'a> {
                         let mut tail_list = Term::var(tail);
 
                         if index < prev_index {
-                            for _ in index..prev_index {
-                                tail_list = Term::tail_list().apply(tail_list);
-                            }
+                            tail_list = tail_list.repeat_tail_list(prev_index - index);
 
-                            term = term.lambda(suffix_tail).apply(tail_list);
+                            if prev_index == constructor_field_count {
+                                term = term.lambda(suffix_tail).apply(Term::empty_list());
+                            } else {
+                                term = term.lambda(suffix_tail).apply(tail_list);
+                            }
                         }
                         prev_index = index;
                     }

crates/aiken-project/src/tests/gen_uplc.rs

@@ -2783,7 +2783,7 @@ fn record_update_output_first_last_val() {
           }
       
         let next_output =
-          Output { ..prev_output, address: Address{thing: "script_hash_0"}, script_ref: None }
+          Output { ..prev_output, script_ref: None, address: Address{thing: "script_hash_0"} }
       
         prev_output == next_output
       }
@@ -2821,9 +2821,7 @@ fn record_update_output_first_last_val() {
                             ),
                     )
                     .lambda("tail_index_4")
-                    .apply(
-                        Term::tail_list().apply(Term::tail_list().apply(Term::var("tail_index_2"))),
-                    )
+                    .apply(Term::empty_list())
                     .lambda("tail_index_2")
                     .apply(Term::tail_list().apply(Term::var("tail_index_1")))
                     .lambda("tail_index_1")