C++14 added some suffixes to specify the type of some user-define literals.Some of them are shown below.
The suffix ‘s‘ is added in string literal to signify it as a string type.Consider the code below.
auto s=”Happy new year!” ; ///s is ‘const char*’ type
auto st=”Happy”s ;///st is ‘string’ type
auto str=”new” , str1= “addition”s ;///error
The third line will give you an error since str will be deduce as ‘const char*’ type but str1 will be deduce as ‘string’ type.Note the difference here.
The suffixes ‘h‘, ‘min‘, ‘s‘, ‘ms‘, ‘us‘, ‘ns‘ is used to denote various chrono::duration time intervals.
Link : C++11 auto
auto sec=60s ;///s is chrono::seconds type
auto hr=2h ;///hr is chrono::hours type
auto mls=56ms ;///mls is chrono:milli-seconds
For complex class there are some suffixes which specify the literals as complex<float> ,complex<double> and complex<long double>.The suffixes are given below.
‘if‘, ‘i‘, ‘il‘.
auto comd=345i ; ///comd is complex<double> type
auto comld=234il ; ///comld is complex<long double> type