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`std.range.takeNone` - multiple declarations

Function takeNone

Returns an empty range which is statically known to be empty and is guaranteed to have length and be random access regardless of R's capabilities.


						
				auto takeNone(R)()
				

				if (isInputRange!R);

Example

auto range = takeNone!(int[])();
writeln(range.length); // 0
assert(range.empty);

Function takeNone

Creates an empty range from the given range in Ο(1). If it can, it will return the same range type. If not, it will return takeExactly(range, 0).


						
				auto takeNone(R)
				(
				

				  R range
				

				)
				

				if (isInputRange!R);

Example

import std.algorithm.iteration : filter;
assert(takeNone([42, 27, 19]).empty);
assert(takeNone("dlang.org").empty);
assert(takeNone(filter!"true"([42, 27, 19])).empty);

Authors

Andrei Alexandrescu, David Simcha, Jonathan M Davis, and Jack Stouffer. Credit for some of the ideas in building this module goes to Leonardo Maffi.

License

Boost License 1.0.

API Documentation

std.range.takeNone - multiple declarations

Function takeNone

Example

Function takeNone

Example

Authors

License

`std.range.takeNone` - multiple declarations