Replace libev with libevent in GenericWorker (#26)

Turned on `-Wshadow`.

CMakeLists.txt

@@ -97,6 +97,7 @@ add_compile_options(-Winvalid-pch)
 add_compile_options(-Wall)
 add_compile_options(-Werror)
 add_compile_options(-Wno-error=sign-compare)
+add_compile_options(-Wshadow)
 
 include_directories(SYSTEM ${VGRAPH_HOME}/third-party/bzip2/_install/include)
 include_directories(SYSTEM ${VGRAPH_HOME}/third-party/double-conversion/_install/include)

src/parser/Expressions.cpp

@@ -238,8 +238,9 @@ Expression::ReturnType ArithmeticExpression::eval() const {
         }
         return asInt(left) % asInt(right);
     default:
-        assert(false);
+        DCHECK(false);
     }
+    return false;
 }
 
 std::string RelationalExpression::toString() const {

src/parser/Expressions.h

@@ -59,8 +59,9 @@ public:
             case 4:
                 return asString(value).empty();
             default:
-                assert(false);
+                DCHECK(false);
         }
+        return false;
     }
 
     static const std::string& asString(const ReturnType &value) {

src/parser/test/CMakeLists.txt

-add_executable(parser_test ParserTest.cpp $<TARGET_OBJECTS:parser_obj>)
-target_link_libraries(parser_test gtest gtest_main pthread)
+add_executable(
+    parser_test
+    ParserTest.cpp
+    $<TARGET_OBJECTS:parser_obj>
+)
+target_link_libraries(
+    parser_test
+    gtest
+    gtest_main
+    glog
+    gflags
+    pthread
+)
 target_include_directories(parser_test SYSTEM BEFORE PUBLIC ${FLEX_INCLUDE_DIRS})
 add_test(NAME parser_test COMMAND parser_test)
 
-add_executable(scanner_test ScannerTest.cpp $<TARGET_OBJECTS:parser_obj>)
-target_link_libraries(scanner_test gtest gtest_main pthread)
+add_executable(
+    scanner_test
+    ScannerTest.cpp
+    $<TARGET_OBJECTS:parser_obj>
+)
+target_link_libraries(
+    scanner_test
+    gtest
+    gtest_main
+    glog
+    gflags
+    pthread
+)
 target_include_directories(scanner_test SYSTEM BEFORE PUBLIC ${FLEX_INCLUDE_DIRS})
 add_test(NAME scanner_test COMMAND scanner_test)