Operator For (Iteration)
Declares or defines operators used by a For...Next loop with user defined type variables
For iterator [ As typename ] = start_value To end_value [ Step step_value ]
typename
stp, step_value
Operator For, Operator Next and Operator Step can be overloaded in user-defined type definitions to allow objects of that type to be used as iterators and step values in For...Next loops.
Operator For is called immediately after copy constructing or assigning to the iterator object, and allows the object to perform any additional initialization needed in preparation for the loop.
The first version of Operator For is used if no step value is given in the For...Next statement. If a step value is given, the second version is used and is passed the step value.
Syntax
Usage
For iterator [ As typename ] = start_value To end_value [ Step step_value ]
[ ...statements... ]
NextParameters
typename
stp, step_value
a typename object used as an incremental value
iteratora typename object used as an iterator
end_valuea typename object used as a loop-terminating value
start_valuea typename object used to copy construct or assign to the iterator initially
Description
Operator For, Operator Next and Operator Step can be overloaded in user-defined type definitions to allow objects of that type to be used as iterators and step values in For...Next loops.
Operator For is called immediately after copy constructing or assigning to the iterator object, and allows the object to perform any additional initialization needed in preparation for the loop.
The first version of Operator For is used if no step value is given in the For...Next statement. If a step value is given, the second version is used and is passed the step value.
Example
Dialect Differences
- Only available in the -lang fb dialect.
See also
