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Function std.range.interfaces.InputRange.opApply

foreach iteration uses opApply, since one delegate call per loop iteration is faster than three virtual function calls.

int opApply (
  scope int delegate(E)
);

int opApply (
  scope int delegate(size_t, E)
);

Authors

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

License

Boost License 1.0.