fix error while using quotation marks in parameters.

include/LightGBM/utils/common.h

@@ -34,6 +34,15 @@ inline static std::string& Trim(std::string& str) {
   return str;
 }
 
+inline static std::string& RemoveQuotationSymbol(std::string& str) {
+  if (str.size() <= 0) {
+    return str;
+  }
+  str.erase(str.find_last_not_of("'\"") + 1);
+  str.erase(0, str.find_first_not_of("'\""));
+  return str;
+}
+
 inline static std::vector<std::string> Split(const char* str, char delimiter) {
   std::stringstream ss(str);
   std::string tmp_str;

src/application/application.cpp

@@ -61,8 +61,8 @@ void Application::LoadParameters(int argc, char** argv) {
   for (int i = 0; i < argc; ++i) {
     std::vector<std::string> tmp_strs = Common::Split(argv[i], '=');
     if (tmp_strs.size() == 2) {
-      std::string key = Common::Trim(tmp_strs[0]);
-      std::string value = Common::Trim(tmp_strs[1]);
+      std::string key = Common::RemoveQuotationSymbol(Common::Trim(tmp_strs[0]));
+      std::string value = Common::RemoveQuotationSymbol(Common::Trim(tmp_strs[1]));
       if (key.size() <= 0) {
         continue;
       }
@@ -84,8 +84,8 @@ void Application::LoadParameters(int argc, char** argv) {
         }
         std::vector<std::string> tmp_strs = Common::Split(line.c_str(), '=');
         if (tmp_strs.size() == 2) {
-          std::string key = Common::Trim(tmp_strs[0]);
-          std::string value = Common::Trim(tmp_strs[1]);
+          std::string key = Common::RemoveQuotationSymbol(Common::Trim(tmp_strs[0]));
+          std::string value = Common::RemoveQuotationSymbol(Common::Trim(tmp_strs[1]));
           if (key.size() <= 0) {
             continue;
           }