Support NODE_LVAR

And fix NODE_BLOCK can't generate correct Array

ext/mjollnir/mjollnir.c

@@ -56,12 +56,11 @@ static VALUE
 node_block_to_hash(const NODE *node)
 {
     VALUE result = rb_ary_new();
-    NODE *nd_head = RNODE_BLOCK(node)->nd_head;
-    NODE *nd_end = RNODE_BLOCK(node)->nd_end;
-
-    while (RNODE_BLOCK(node)->nd_next && nd_head != nd_end) {
- 	rb_ary_push(result, ast_to_values(Qnil, nd_head));
-	nd_head = RNODE_BLOCK(node)->nd_next;
+    const NODE *current_node = node;
+
+    while (current_node) {
+ 	rb_ary_push(result, ast_to_values(Qnil, RNODE_BLOCK(current_node)->nd_head));
+	current_node = RNODE_BLOCK(current_node)->nd_next;
     }
 
     return result;
@@ -76,6 +75,14 @@ left_assign_to_hash(const NODE *node)
     return result;
 }
 
+static VALUE
+node_lvar_to_hash(const NODE *node)
+{
+    VALUE result = rb_hash_new();
+    rb_hash_aset(result, rb_str_new2("vid"), ID2SYM(RNODE_LVAR(node)->nd_vid));
+    return result;
+}
+
 static VALUE
 literal_node_to_hash(const NODE *node)
 {
@@ -143,13 +150,20 @@ ast_to_values(VALUE hash, const NODE *node)
 	  return result;
 	}
 	case NODE_BLOCK: {
-	  return node_block_to_hash(node);
+	  VALUE result = rb_hash_new();
+	  rb_hash_aset(result, rb_str_new2("NODE_BLOCK"), node_block_to_hash(node));
+	  return result;
 	}
 	case NODE_LASGN: {
 	  VALUE result = rb_hash_new();
 	  rb_hash_aset(result, rb_str_new2("NODE_LASGN"), left_assign_to_hash(node));
 	  return result;
 	}
+	case NODE_LVAR: {
+	  VALUE result = rb_hash_new();
+	  rb_hash_aset(result, rb_str_new2("NODE_LVAR"), node_lvar_to_hash(node));
+	  return result;
+	}
 	case NODE_LIST: {
 	  VALUE result = rb_hash_new();
 	  rb_hash_aset(result, rb_str_new2("NODE_LIST"), list_node_to_hash(node));

test/mjollnir/parse_lvar_test.rb

@@ -0,0 +1,43 @@
+# frozen_string_literal: true
+
+require 'test_helper'
+
+class ParseLvarTest < Minitest::Test
+  def test_parse_lvar
+    result = Mjollnir.parse(<<~CODE)
+      v = 117
+      p v
+    CODE
+
+    expected = {
+      'NODE_SCOPE' => {
+        'NODE_BLOCK' => [
+          {
+            'NODE_LASGN' => {
+              'id' => :v,
+              'value' => {
+                'NODE_INTEGER' => 117
+              }
+            }
+          },
+          {
+            'NODE_FCALL' => {
+              'mid' => :p,
+              'args' => {
+                'NODE_LIST' => [
+                  {
+                    'NODE_LVAR' => {
+                      'vid' => :v
+                    }
+                  }
+                ]
+              }
+            }
+          }
+        ]
+      }
+    }
+
+    assert_equal expected, result
+  end
+end