c++ - mac系统下用带YouCompleteMe插件的vim编写cpp程序报错

Question

黄色三角形显示：expression result unused；
红色叉叉显示：reference to overloaded function could not be resolved;did you mean to call it?

下面是我的.ycm_extra_conf.py配置

Answer 1

不好意思自己的头文件位置找错了,不应该用网上帮你配制或者是默认的，具体的头文件位置还是要自己配制！
倒数第五行替换换成下列
'/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/usr/include'

Answer 2

运行 echo | clang -std=c 11 -stdlib=libc -v -E -x c - 找到系统的头文件，加入-isystem里面。如果你用了homebrew安装了各种包的话，也需要把include加入-isystem里面，应该是'/usr/local/include',。
我的ycm_config里面是这样的

 53 'c++',
 54 '-isystem', #Mark as system header
 55 #Using `echo | clang -std=c++11 -stdlib=libc++ -v -E -x c++ -` to generate the following infos
 56 '/usr/local/include',
 57 '-isystem',
 58 '/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1',
 59 '-isystem',
 60 '/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/7.0.0/include',
 61 '-isystem',
 62 '/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include',
 63 '-isystem',
 64 '/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/usr/include',
 65 '-isystem',
 66 '/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/System/Library/Frameworks',