Consider
template <typename... X, typename Y>
void f(X... x, Y y) {
}
int main(int ac, char** av) {
f(1, 2, 3, 4);
return 0;
}
is this legal?
gcc complains:
./variadic-function-nonlast.cc: In function ‘int main(int, char**)’:
./variadic-function-nonlast.cc:9:15: error: no matching function for
call to ‘f(int, int, int, int)’
f(1, 2, 3, 4);
^
./variadic-function-nonlast.cc:4:6: note: candidate: template<class ...
X, class Y> void f(X ..., Y)
void f(X... x, Y y) {
^
./variadic-function-nonlast.cc:4:6: note: template argument
deduction/substitution failed:
./variadic-function-nonlast.cc:9:15: note: candidate expects 1
argument, 4 provided
f(1, 2, 3, 4);
^
So it's not complaining that f() is illegal, yet it id not deducing X...
as int, int, int.
