feat: Allow empty BU_: nodes

Author: LinuxDevon

.github/workflows/pipeline.yml

@@ -218,6 +218,6 @@ jobs:
     - name: Make build directory
       run: cmake -Bbuild -H$GITHUB_WORKSPACE
 
-    - name: Run clang-tidy check
+    - name: Run build
       run: cmake --build build
 

src/dbc.cpp

@@ -59,7 +59,7 @@ DbcParser::DbcParser()
 	: version_re("^(VERSION)\\s\"(.*)\"")
 	, bit_timing_re("^(BS_:)")
 	, name_space_re("^(NS_)\\s\\:")
-	, node_re("^(BU_:)\\s((?:[\\w]+?\\s?)*)")
+	, node_re("^(BU_:)\\s?((?:[\\w]+?\\s?)*)?")
 	, message_re("^(BO_)\\s(\\d+)\\s(\\w+)\\:\\s(\\d+)\\s(\\w+|Vector__XXX)")
 	, value_re("^(VAL_)\\s(\\d+)\\s(\\w+)((?:\\s(\\d+)\\s\"([^\"]*)\")+)\\s;$")
 	,

test/test_dbc.cpp

@@ -239,3 +239,30 @@ VAL_ 123 State1 123 "Description 3" 0 "Description 4" ;)";
 	REQUIRE(signal2.value_descriptions.at(1).value == 0);
 	REQUIRE(signal2.value_descriptions.at(1).description == "Description 4");
 }
+
+TEST_CASE("Should parse DBC with empty BU_") {
+	std::string contents = R"(VERSION ""
+
+
+NS_ :
+
+BS_:
+
+BU_:
+
+
+BO_ 293 Msg1: 2 Vector__XXX
+ SG_ Wert7 : 0|16@1- (1,0) [0|0] "" Vector__XXX
+
+BO_ 292 Msg2: 8 Vector__XXX
+ SG_ Wert8 : 56|8@1- (1,0) [0|0] "" Vector__XXX
+)";
+	const auto filename = create_temporary_dbc_with(contents.c_str());
+
+	auto parser = Libdbc::DbcParser();
+	parser.parse_file(filename.c_str());
+
+	REQUIRE(parser.get_messages().size() == 2);
+	REQUIRE(parser.get_messages().at(0).name() == "Msg1");
+	REQUIRE(parser.get_messages().at(1).name() == "Msg2");
+}