Select statement

[alaingilbert]

Add select to the language

examples:

a = make(chan int64, 1)
select {
    case <-a:
        println("value received on a")
    default:
        println("default")
}

a = make(chan int64, 1)
b = make(chan int64, 1)
b <- 2
val = 0
select {
    case val = <-a:
        println("value " + val + " received on a")
    case val = <-b:
        println("value " + val + " received on b")
}

[codecov-io]

Codecov Report

Merging #325 into master will increase coverage by 0.28%. The diff coverage is 100%.

@@            Coverage Diff            @@
##           master    #325      +/-   ##
=========================================
+ Coverage   87.42%   87.7%   +0.28%     
=========================================
  Files          15      15              
  Lines        2663    2742      +79     
=========================================
+ Hits         2328    2405      +77     
- Misses        216     217       +1     
- Partials      119     120       +1

Impacted Files	Coverage Δ
vm/vmStmt.go	96.69% <100%> (+0.49%)	:arrow_up:
vm/vm.go	85.84% <0%> (-0.89%)	:arrow_down:

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[brutella]

Any chance this gets merged?