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Alias std.functional.compose

Composes passed-in functions fun[0], fun[1], ....

alias compose(fun...) = unaryFun!(fun[0]);

Parameters

NameDescription
fun the call-able(s) or string(s) to compose into one function

Returns

A new function f(x) that in turn returns fun[0](fun[1](...(x)))....

See Also

pipe

Example

import std.algorithm.comparison : equal;
import std.algorithm.iteration : map;
import std.array : split;
import std.conv : to;

// First split a string in whitespace-separated tokens and then
// convert each token into an integer
assert(compose!(map!(to!(int)), split)("1 2 3").equal([1, 2, 3]));

Authors

Andrei Alexandrescu

License

Boost License 1.0.