N1905 [conv.integral] If the destination type is bool, see 4.12. If the source type is bool, the value false is converted to zero and the value true is converted to one. [conv.bool] An rvalue of arithmetic, enumeration, pointer, or pointer…

2018-04-25に vue-loader15がリリースされたのだけど、色々変更が多く互換性が無くて設定が面倒だったので、vue-loader 14 を入れることにした。 npm install -D vue-loader@14

N1905 23.1.2 - 8 The insert members shall not affect the validity of iterators and references to the container, and the erase members shall invalidate only iterators and references to the erased elements C++の連想コンテナ全般（setとかmap系…