fix: give yield in _reserved_identifier a precedence of 0

This fixes an issue where yield used as a method invocation's name is
misparsed, because the keyword `yield` is always selected in this parse
state

Author: amaanq

grammar.js

@@ -86,6 +86,7 @@ module.exports = grammar({
     [$.lambda_expression, $.primary_expression],
     [$.inferred_parameters, $.primary_expression],
     [$.argument_list, $.record_pattern_body],
+    [$.yield_statement, $._reserved_identifier],
   ],
 
   word: $ => $.identifier,
@@ -1266,17 +1267,19 @@ module.exports = grammar({
       field('body', $.block),
     ),
 
-    _reserved_identifier: $ => prec(-3, alias(
-      choice(
-        'open',
-        'module',
-        'record',
-        'with',
-        'yield',
-        'sealed',
-      ),
-      $.identifier,
-    )),
+    _reserved_identifier: $ => choice(
+      prec(-3, alias(
+        choice(
+          'open',
+          'module',
+          'record',
+          'with',
+          'sealed',
+        ),
+        $.identifier,
+      )),
+      alias('yield', $.identifier),
+    ),
 
     this: _ => 'this',
 

test/corpus/declarations.txt

@@ -1081,6 +1081,7 @@ public class Keywords {
   public void demo() {
     int sealed = 0;
     bool yield = false;
+    yield(1, 2);
   }
 }
 
@@ -1113,7 +1114,13 @@ public class Keywords {
             (type_identifier)
             (variable_declarator
               (identifier)
-              (false))))))))
+              (false)))
+          (expression_statement
+            (method_invocation
+              (identifier)
+              (argument_list
+                (decimal_integer_literal)
+                (decimal_integer_literal)))))))))
 
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