関連ワード:  non-void function should return a value    non void function should return a value swift    non void function main should return a value    error non void function getanglerevision should return a value    void function should not return a value    non void function does not return a value in all control paths    non void function does not return a value    non void function does not return a value - wreturn type    non void function does not return a value c++    non-void function does not return a value clang(-wreturn-type)  
結果 : non-void function should return a value