Modern Chan Channel RecvChan

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RecvChan

Holds a receive-only view of a channel, which cannot send to it or close it.

Syntax

RecvChan( of T )

Notes

• The other half of SendChan: a consumer given one of these cannot send, and cannot close a channel it does not own the producing end of.
• A view of the same channel, not a copy.
• Closing is the sender's statement to make, which is exactly what this type prevents a consumer from doing.
• Requires -mt.

Examples

#import "std/tasks"
using tasks

dim ch as Channel( of int32 ) = Channel( of int32 )( 4 )
dim as int32 v = 42
ch.Send( v )
ch.Close( )

'' The consumer's half: it can receive and cannot send or close
dim r as RecvChan( of int32 ) = ch
dim as int32 got
print r.Receive( got )       '' true
print got                    '' 42
print r.Receive( got )       '' false -- closed and drained

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Library: Goroutines and Channels
Category: Goroutines and Channels
Documented under: Members