error C2429: 语言功能 "嵌套命名空间定 义" 需要编译器标志"/std:c++17"  #3107

When I build program. It throw errors cause of c++ version.
But I already set config in "binding.gyp". It still throw that error.
How to solve this problem !!

binding.gyp
"cflags_cc": [
"/std=c++17"
],
"msvs_settings": {
"VCLinkerTool": {
"AdditionalOptions": [
"/std:c++17"
]
}
},