The title is slightly click-bait-y: C++20 doesn't have default parameters. It talks about how to fake it with structs.
It's a pretty convincing fake, but it has one problem: the person who wrote the function needs to have written it that way. What I wish more languages had (C++, Java, etc.) is the following:
Suppose I write some function that take way too many parameters:
void foo(char a, short b, long c, float d, double e){}
What I want, as a caller, is for the language to let me get a struct corresponding to the argument list, something like this:
foo::args whatever;
whatever.e = 3.14;
// fill in the rest
And then add a bit of magic syntax so we can "unpack" that struct to actually call foo. (Extending this proposal to handle varargs is left as an exercise to the reader, because I have no idea.)
It's a pretty convincing fake, but it has one problem: the person who wrote the function needs to have written it that way. What I wish more languages had (C++, Java, etc.) is the following:
Suppose I write some function that take way too many parameters:
void foo(char a, short b, long c, float d, double e){}
What I want, as a caller, is for the language to let me get a struct corresponding to the argument list, something like this:
And then add a bit of magic syntax so we can "unpack" that struct to actually call foo. (Extending this proposal to handle varargs is left as an exercise to the reader, because I have no idea.)