Var decl with repeat

crates/parser/src/ast/statement.rs

@@ -44,8 +44,9 @@ pub struct MatchItem(pub Vec<Pattern>, pub Expression);
 
 #[derive(Debug, Clone, Serialize)]
 pub struct VarDecl {
-    pub name: Pattern,
     pub type_: Option<TypeExpr>,
+    pub name: Pattern,
+    pub tuple_names: Vec<Pattern>,
 }
 
 #[derive(Debug, Clone, Serialize)]

crates/parser/src/grammar.pest

@@ -226,8 +226,8 @@ attributes = {
 // DECLARATION HELPERS
 // ======================================================
 var_decl = {
-    ("let" ~ pattern)
-  | type_expr ~ (!tuple_pattern ~ pattern)
+    ("let" ~ pattern ~ ("," ~ pattern)*)
+  | type_expr ~ (!tuple_pattern ~ pattern ~ ("," ~ pattern)*)
 }
 
 field = {

crates/parser/src/parser/common/decl.rs

@@ -56,6 +56,7 @@ impl<'a> TryFrom<pest::iterators::Pair<'a, Rule>> for VarDecl {
                         .map(TypeExpr::try_from)
                         .transpose()?,
                     name: Pattern::try_from(inner.next().unwrap())?,
+                    tuple_names: collect_recovered(inner)?,
                 })
             }