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Function `std.functional.partial`

Partially applies fun by tying its first argument to arg.


						
				ReturnType!fun partial(alias fun, alias arg)
				(
				

				  Parameters!fun[1..__dollar] args2
				

				);

Parameters

Name	Description
fun	A callable
arg	The first argument to apply to `fun`

Returns

A new function which calls fun with arg plus the passed parameters.

Example

int fun(int a, int b) { return a + b; }
alias fun5 = partial!(fun, 5);
writeln(fun5(6)); // 11
// Note that in most cases you'd use an alias instead of a value
// assignment. Using an alias allows you to partially evaluate template
// functions without committing to a particular type of the function.

Authors

Andrei Alexandrescu

License

Boost License 1.0.