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Class std.concurrency.Generator

A Generator is a Fiber that periodically returns values of type T to the caller via yield. This is represented as an InputRange.

class Generator(T) ;

Constructors

NameDescription
this Initializes a generator object which is associated with a static D function. The function will be called once to prepare the range for iteration.
this Initializes a generator object which is associated with a static D function. The function will be called once to prepare the range for iteration.
this Initializes a generator object which is associated with a static D function. The function will be called once to prepare the range for iteration.
this Initializes a generator object which is associated with a dynamic D function. The function will be called once to prepare the range for iteration.
this Initializes a generator object which is associated with a dynamic D function. The function will be called once to prepare the range for iteration.
this Initializes a generator object which is associated with a dynamic D function. The function will be called once to prepare the range for iteration.

Properties

NameTypeDescription
empty[get] boolReturns true if the generator is empty.
front[get] TReturns the most recently generated value by shallow copy.

Methods

NameDescription
moveFront Returns the most recently generated value without executing a copy contructor. Will not compile for element types defining a postblit, because Generator does not return by reference.
popFront Obtains the next value from the underlying function.
factory Create instance of class specified by the fully qualified name classname. The class must either have no constructors or have a default constructor.
opCmp Compare with another Object obj.
opEquals Test whether this is equal to o. The default implementation only compares by identity (using the is operator). Generally, overrides for opEquals should attempt to compare objects by their contents.
toHash Compute hash function for Object.
toString Convert Object to a human readable string.

Example

auto tid = spawn({
    int i;
    while (i < 9)
        i = receiveOnly!int;

    ownerTid.send(i * 2);
});

auto r = new Generator!int({
    foreach (i; 1 .. 10)
        yield(i);
});

foreach (e; r)
    tid.send(e);

writeln(receiveOnly!int); // 18

Authors

Sean Kelly, Alex Rønne Petersen, Martin Nowak

License

Boost License 1.0.