fix: added explanation for nested pair error, added more errors

2025-02-06 23:08:34 +00:00
parent a2c81883f4
commit f24f8c87d8
1 changed files with 3 additions and 2 deletions
--- a/src/main/wacc/parser.scala
+++ b/src/main/wacc/parser.scala
@@ -110,8 +110,9 @@ object parser {
  private lazy val `<pair-elem-type>` =
    (`<base-type>` <**> (`<array-type>` </> identity)) |
      ((UntypedPairType from `<pair-type>`) <**>
-        ((`<pair-elems-type>` <**> `<array-type>`)
-          .map(arr => (_: UntypedPairType) => arr) </> identity))
+        ((`<pair-elems-type>` <**> `<array-type>`.explain(
+          "non-erased pair types cannot be nested"
+        )).map(arr => (_: UntypedPairType) => arr) </> identity))

  // Statements
  private lazy val `<program>` = Program(