refactor: Simplify if statements (#1381)

src/components/config.cpp

@@ -238,17 +238,7 @@ template <>
 bool config::convert(string&& value) const {
   string lower{string_util::lower(forward<string>(value))};
 
-  if (lower == "true") {
-    return true;
-  } else if (lower == "yes") {
-    return true;
-  } else if (lower == "on") {
-    return true;
-  } else if (lower == "1") {
-    return true;
-  } else {
-    return false;
-  }
+  return (lower == "true" || lower == "yes" || lower == "on" || lower == "1");
 }
 
 template <>

src/drawtypes/progressbar.cpp

@@ -34,11 +34,7 @@ namespace drawtypes {
   void progressbar::set_colors(vector<string>&& colors) {
     m_colors = forward<decltype(colors)>(colors);
 
-    if (m_colors.empty()) {
-      m_colorstep = 1;
-    } else {
-      m_colorstep = m_width / m_colors.size();
-    }
+    m_colorstep = m_colors.empty() ? 1 : m_width / m_colors.size();
   }
 
   string progressbar::output(float percentage) {

src/ipc.cpp

@@ -38,15 +38,7 @@ void remove_pipe(const string& handle) {
 }
 
 bool validate_type(const string& type) {
-  if (type == "action") {
-    return true;
-  } else if (type == "cmd") {
-    return true;
-  } else if (type == "hook") {
-    return true;
-  } else {
-    return false;
-  }
+  return (type == "action" || type == "cmd" || type == "hook");
 }
 
 int main(int argc, char** argv) {

src/x11/cursor.cpp

@@ -4,9 +4,7 @@ POLYBAR_NS
 
 namespace cursor_util {
   bool valid(string name) {
-    if (cursors.find(name) != cursors.end())
-      return true;
-    return false;
+    return (cursors.find(name) != cursors.end());
   }
 
   bool set_cursor(xcb_connection_t *c, xcb_screen_t *screen, xcb_window_t w, string name) {