Test nested assignment (that it fails as expected)

inputs/failing/nested_assignment.ts

@@ -0,0 +1,23 @@
+// test_output! [9,9,9]
+
+// This is not correct - it should be [1,4,9]. The problem is that the rhs
+// *value* is supposed to be the result of the assignment, but when each rhs is
+// compiled %x is used to store the result directly (e.g. op* 1 1 %x), and so %x
+// is then used as the result of the expression.
+//
+// This could be easily fixed by simply creating an extra register for the rhs
+// of each assignment and doing an extra mov to get it into the variable
+// register. However, that makes the assembly extremely verbose. I'm hoping
+// there's a nice way to generate relatively neat and tidy assembly directly,
+// but it might make sense in the end, and just deal with it in assembly-level
+// optimization.
+
+export default function main() {
+  let x = 0;
+
+  return [
+    x = 1 * 1,
+    x = 2 * 2,
+    x = 3 * 3,
+  ];
+}

valuescript_compiler/src/expression_compiler.rs

@@ -431,9 +431,7 @@ impl<'a> ExpressionCompiler<'a> {
 
     match at {
       AssignTarget::Register(treg) => {
-        self.compile(&assign_expr.right, Some(treg.clone()));
-
-        return CompiledExpression::new(format!("%{}", treg), vec![]);
+        return self.compile(&assign_expr.right, Some(treg.clone()));
       }
       AssignTarget::Member(mut obj_accessor, prop) => {
         let subscript = match prop {