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Generator
Generator
Category : functors
Component type : concept
Description
A Generator is a kind of function object : an object that is called
as if it were an ordinary C++ function. A Generator is called with no
arguments.
Refinement of
Assignable
Associated types
Result type
The type returned when the Generator is called
Notation
F
A type that is a model of Generator
Result
The result type of F
f
Object of type F
Definitions
The range of a Generator is the set of all possible value that it
may return.
Valid expressions
Name
Expression
Type requirements
Return type
Function call
f()
Result
Expression semantics
Name
Expression
Precondition
Semantics
Postcondition
Function call
f()
Returns some value of type Result [1]
The return value is in f 's range.
Complexity guarantees
Invariants
Models
Notes
[1]
Two different invocations of f may return different results:
a Generator may refer to local state, perform I/O, and
so on. The expression f() is permitted to change f 's state; f
might, for example, represent a pseudo-random number generator.
See also
Function Object overview , Unary Function , Binary Function ,
Adaptable Generator
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