From 1bf9be140c3c834b50a1acd8d1c6cec5bd9dc630 Mon Sep 17 00:00:00 2001
From: yui-knk <spiketeika@gmail.com>
Date: Mon, 31 Jul 2023 09:47:52 +0900
Subject: [PATCH 1/2] Add test case for named references

---
 spec/lrama/integration_spec.rb | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/spec/lrama/integration_spec.rb b/spec/lrama/integration_spec.rb
index 5c96c550..ed4bdf49 100644
--- a/spec/lrama/integration_spec.rb
+++ b/spec/lrama/integration_spec.rb
@@ -109,4 +109,36 @@ def test_rules(rules, input, expected)
       Rules
     end
   end
+
+  describe "named references" do
+    it "returns 3 for '1 2 +" do
+      # 1 2 + #=> 3
+      input = [
+        %w[NUM val 1],
+        %w[NUM val 2],
+        %w['+'],
+      ]
+
+      test_rules(<<~Rules, input, "=> 3")
+  %union {
+      int val;
+  }
+  %token <val> NUM
+  %type <val> expr
+
+  %%
+
+  line: expr
+          { printf("=> %d", $expr); }
+      ;
+
+  expr[result]: NUM
+              | expr[left] expr[right] '+'
+                  { $result = $left + $right; }
+              ;
+
+  %%
+      Rules
+    end
+  end
 end

From 573e42a425f7214a806d0b801315ee800bef1793 Mon Sep 17 00:00:00 2001
From: yui-knk <spiketeika@gmail.com>
Date: Mon, 31 Jul 2023 09:48:12 +0900
Subject: [PATCH 2/2] Remove unused variable

---
 spec/lrama/integration_spec.rb | 1 -
 1 file changed, 1 deletion(-)

diff --git a/spec/lrama/integration_spec.rb b/spec/lrama/integration_spec.rb
index ed4bdf49..d0234360 100644
--- a/spec/lrama/integration_spec.rb
+++ b/spec/lrama/integration_spec.rb
@@ -81,7 +81,6 @@ def test_rules(rules, input, expected)
         %w['*'],
         %w[NUM val 3]
       ]
-      expected = "9"
 
       test_rules(<<~Rules, input, "=> 9")
   %union {