fix: pipe expression rhs

Close #182

Author: aspeddro

grammar.js

@@ -746,12 +746,7 @@ module.exports = grammar({
       $.primary_expression,
       choice('->', '|>'),
       choice(
-        $.value_identifier,
-        $.value_identifier_path,
-        $.variant_identifier,
-        $.polyvar_identifier,
-        $.nested_variant_identifier,
-        $.parenthesized_expression,
+        $.primary_expression,
         $.block,
       ),
     )),

test/corpus/expressions.txt

@@ -209,24 +209,24 @@ foo->{
       (value_identifier)))
   (expression_statement
     (pipe_expression
-      (call_expression
-        (pipe_expression
-          (value_identifier)
+      (pipe_expression
+        (value_identifier)
+        (call_expression
           (value_identifier_path
             (module_identifier)
-            (value_identifier)))
-        (arguments (value_identifier)))
+            (value_identifier))
+          (arguments (value_identifier))))
       (value_identifier_path
         (module_identifier)
         (value_identifier))))
   (expression_statement
     (pipe_expression
       (number)
-      (variant_identifier)))
+      (variant (variant_identifier))))
   (expression_statement
     (pipe_expression
       (value_identifier)
-      (polyvar_identifier)))
+      (polyvar (polyvar_identifier))))
   (expression_statement
     (pipe_expression
       (value_identifier)