Accept n+ as array lengths (#7212)

Signed-off-by: Nick Cameron <nrc@ncameron.org>

rust/kcl-lib/src/parsing/ast/digest.rs

@@ -198,7 +198,7 @@ impl Type {
                 hasher.update(ty.compute_digest());
                 match len {
                     crate::execution::types::ArrayLen::None => {}
-                    crate::execution::types::ArrayLen::NonEmpty => hasher.update(usize::MAX.to_ne_bytes()),
+                    crate::execution::types::ArrayLen::Minimum(n) => hasher.update((-(*n as isize)).to_ne_bytes()),
                     crate::execution::types::ArrayLen::Known(n) => hasher.update(n.to_ne_bytes()),
                 }
             }

rust/kcl-lib/src/parsing/ast/types/mod.rs

@@ -3336,7 +3336,7 @@ impl fmt::Display for Type {
                 write!(f, "[{ty}")?;
                 match len {
                     ArrayLen::None => {}
-                    ArrayLen::NonEmpty => write!(f, "; 1+")?,
+                    ArrayLen::Minimum(n) => write!(f, "; {n}+")?,
                     ArrayLen::Known(n) => write!(f, "; {n}")?,
                 }
                 write!(f, "]")

rust/kcl-lib/src/parsing/parser.rs

@@ -2968,16 +2968,9 @@ fn array_type(i: &mut TokenSlice) -> ModalResult<Node<Type>> {
     .parse_next(i)?;
     close_bracket(i)?;
 
-    let len = if let Some((tok, _, n, plus)) = len {
+    let len = if let Some((_, _, n, plus)) = len {
         if plus.is_some() {
-            if n != 1 {
-                return Err(ErrMode::Cut(ContextError::from(CompilationError::fatal(
-                    tok.as_source_range(),
-                    "Non-empty arrays are specified using `1+`, for a fixed-size array use just an integer",
-                ))));
-            } else {
-                ArrayLen::NonEmpty
-            }
+            ArrayLen::Minimum(n)
         } else {
             ArrayLen::Known(n)
         }