Work on closures.

src/parser/ast.yaml

@@ -586,4 +586,24 @@ ExpressionList:
   children:
     - expressions:
         rule: Expression
-        vec: true
+        vec: true
+
+# Closure
+Closure:
+  children:
+    - closure_parameters:
+        build:
+          or_else_default: true
+    - statements:
+        rule: Statement
+        vec: true
+ClosureParameters:
+  children:
+    - parameters:
+        rule: ClosureParameters
+        vec: true
+ClosureParameter:
+  children:
+    - identifier
+    - type_use:
+        optional: true

src/parser/deimos.pest

@@ -789,13 +789,9 @@ ExpressionList = {
 // Closure
 
 Closure = {
-      ( Cons | Mut )?
+      "{"
-    ~ Move?
-    ~ ClosureCaptures?
-    ~ "{"
     ~ ( ClosureParameters? ~ "->" )?
     ~ Statement*
-    ~ Expression?
     ~ "}"
 }
 
@@ -809,19 +805,6 @@ ClosureParameter = {
     ~ ( ":" ~ TypeUse )?
 }
 
-ClosureCaptures = {
-      "|"
-    ~ ClosureCapture
-    ~ ( "," ~ ClosureCapture )*
-    ~ "|"
-}
-
-ClosureCapture = {
-      Borrow*
-    ~ Mut?
-    ~ Identifier
-}
-
 // Literals
 
 Literal = {