From 8f2e3e7af0360cca7f8918ae41cc573f8cd88d7f Mon Sep 17 00:00:00 2001
From: Roland Reichwein <mail@reichwein.it>
Date: Mon, 9 Nov 2020 16:55:10 +0100
Subject: Support empty translation unit

---
 Makefile           | 2 +-
 grammer.cpp        | 3 ---
 tests/test-cpp.cpp | 4 +++-
 3 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/Makefile b/Makefile
index 8cc8c0f..be048c4 100644
--- a/Makefile
+++ b/Makefile
@@ -91,7 +91,7 @@ TESTSRC=\
 SRC=$(PROGSRC) mcc.cpp
 
 all: test-$(PROJECTNAME) mcc
-	./test-$(PROJECTNAME) --gtest_filter='CppTest.compile_2_times'
+	./test-$(PROJECTNAME) #--gtest_filter='CppTest.compile_2_times'
 
 # testsuite ----------------------------------------------
 test-$(PROJECTNAME): $(TESTSRC:.cpp=.o)
diff --git a/grammer.cpp b/grammer.cpp
index 31a4bbf..3f3a0f1 100644
--- a/grammer.cpp
+++ b/grammer.cpp
@@ -392,9 +392,6 @@ std::vector<TreeNode> Compiler::compile(std::vector<Token> p_tokens)
  clear();
  tokens = p_tokens;
 
- if (tokens.size() == 0)
-  throw std::runtime_error("No tokens");
-
  //
  // top-down algorithm:
  //
diff --git a/tests/test-cpp.cpp b/tests/test-cpp.cpp
index 0a0276e..e80f2d6 100644
--- a/tests/test-cpp.cpp
+++ b/tests/test-cpp.cpp
@@ -57,7 +57,9 @@ TEST_F(CppTest, preprocessing_tokenize_empty) {
 
  auto nodes = cpp.analysis(tokens);
  
- ASSERT_EQ(nodes.size(), 0);
+ ASSERT_EQ(nodes.size(), 1);
+
+ ASSERT_EQ(nodes[0].type, "translation-unit");
 }
 
 TEST_F(CppTest, preprocessing_tokenize_compile_error) {
-- 
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