Go language provides inbuilt support implementation of run-time reflection and allowing a program to manipulate objects with arbitrary types with the help of reflect package. The reflect.TrySend() Function in Golang attempts to send x on the channel v but will not block. To access this function, one needs to imports the reflect package in the program.
Syntax:
func (v Value) TrySend(x Value) boolParameters: This function accept one parameter of Value type (x).
Return Value: This function returns whether the value was sent.
Below examples illustrate the use of the above method in Golang:
Example 1:
// Golang program to illustrate // reflect.TrySend() Function package main import (
"fmt"
"reflect"
)
func main() { c := make(chan int , 1)
vc := reflect.ValueOf(c)
// use of TrySend() method
succeeded := vc.TrySend(reflect.ValueOf(123))
fmt.Println(succeeded, vc.Len(), vc.Cap())
} |
Output:
true 1 1
Example 2:
// Golang program to illustrate // reflect.TrySend() Function package main
import (
"fmt"
"reflect"
)
func main() { c := make(chan int , 1)
vc := reflect.ValueOf(c)
// use of TrySend() method
succeeded := vc.TrySend(reflect.ValueOf(123))
fmt.Println(succeeded, vc.Len(), vc.Cap())
vSend, vZero := reflect.ValueOf(789), reflect.Value{}
branches := []reflect.SelectCase{
{Dir: reflect.SelectDefault, Chan: vZero, Send: vZero},
{Dir: reflect.SelectRecv, Chan: vc, Send: vZero},
{Dir: reflect.SelectSend, Chan: vc, Send: vSend},
}
selIndex, vRecv, sentBeforeClosed := reflect.Select(branches)
fmt.Println(selIndex)
fmt.Println(sentBeforeClosed)
fmt.Println(vRecv.Int())
vc.Close()
// Remove the send case branch this time,
// for it may cause panic.
selIndex, _, sentBeforeClosed = reflect.Select(branches[:2])
fmt.Println(selIndex, sentBeforeClosed)
} |
Output:
true 1 1 1 true 123 1 false