Fix #266

Author: yhirose

peglib.h

@@ -2753,7 +2753,14 @@ inline size_t Holder::parse_core(const char *s, size_t n, SemanticValues &vs,
       chvs.sv_ = std::string_view(s, len);
       chvs.name_ = outer_->name;
 
-      if (!dynamic_cast<const peg::PrioritizedChoice *>(ope_.get())) {
+      auto ope_ptr = ope_.get();
+      {
+        auto tok_ptr = dynamic_cast<const peg::TokenBoundary *>(ope_ptr);
+        if (tok_ptr) {
+          ope_ptr = tok_ptr->ope_.get();
+        }
+      }
+      if (!dynamic_cast<const peg::PrioritizedChoice *>(ope_ptr)) {
         chvs.choice_count_ = 0;
         chvs.choice_ = 0;
       }

test/test1.cc

@@ -1233,3 +1233,18 @@ LINE_END               <-  '\r\n' / '\r' / '\n' / !.
   }
 }
 
+TEST(GeneralTest, ChoiceWithWhitespace) {
+  auto parser = peg::parser(R"(
+    type <- 'string' / 'int' / 'double'
+    %whitespace <- ' '*
+  )");
+
+  parser["type"] = [](const SemanticValues& vs) {
+    auto n = vs.choice();
+    EXPECT_EQ(1, n);
+  };
+
+  auto ret = parser.parse("int");
+  EXPECT_TRUE(ret);
+}
+