Improved expression prefix

parser/src/grammar.pest

@@ -179,6 +179,8 @@ mut_ref_px = { "&" ~ mutable }
 ref_px     = { "&" }
 new_px     = { "new" }
 
+prefix_list = { prefix* }
+
 expr = {
-    prefix* ~ primary ~ postfix*
+    prefix_list ~ primary ~ postfix*
 }

parser/src/lib.rs

@@ -368,15 +368,10 @@ impl From<pest::iterators::Pair<'_, Rule>> for Expression {
 
         match rule {
             Rule::expr => {
-                let mut prefixes = Vec::new();
-
-                while inner
-                    .peek()
-                    .map(|v| v.as_rule() == Rule::prefix)
-                    .unwrap_or_default()
-                {
-                    prefixes.push(Prefix::from(inner.next().unwrap()));
-                }
+                let prefixes: Vec<Prefix> = inner
+                    .next()
+                    .map(|p| p.into_inner().into_iter().map(Prefix::from).collect())
+                    .unwrap_or_default();
 
                 let exp = Expression::from(inner.next().unwrap());