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ChanReadSeeker.dot.go
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ChanReadSeeker.dot.go
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// Copyright 2017 Andreas Pannewitz. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package io
// This file was generated with dotgo
// DO NOT EDIT - Improve the pattern!
import (
"io"
)
// MakeReadSeekerChan returns a new open channel
// (simply a 'chan io.ReadSeeker' that is).
//
// Note: No 'ReadSeeker-producer' is launched here yet! (as is in all the other functions).
//
// This is useful to easily create corresponding variables such as
//
// var myReadSeekerPipelineStartsHere := MakeReadSeekerChan()
// // ... lot's of code to design and build Your favourite "myReadSeekerWorkflowPipeline"
// // ...
// // ... *before* You start pouring data into it, e.g. simply via:
// for drop := range water {
// myReadSeekerPipelineStartsHere <- drop
// }
// close(myReadSeekerPipelineStartsHere)
//
// Hint: especially helpful, if Your piping library operates on some hidden (non-exported) type
// (or on a type imported from elsewhere - and You don't want/need or should(!) have to care.)
//
// Note: as always (except for PipeReadSeekerBuffer) the channel is unbuffered.
//
func MakeReadSeekerChan() chan io.ReadSeeker {
return make(chan io.ReadSeeker)
}
// ChanReadSeeker returns a channel to receive all inputs before close.
func ChanReadSeeker(inp ...io.ReadSeeker) chan io.ReadSeeker {
out := make(chan io.ReadSeeker)
go func() {
defer close(out)
for i := range inp {
out <- inp[i]
}
}()
return out
}
// ChanReadSeekerSlice returns a channel to receive all inputs before close.
func ChanReadSeekerSlice(inp ...[]io.ReadSeeker) chan io.ReadSeeker {
out := make(chan io.ReadSeeker)
go func() {
defer close(out)
for i := range inp {
for j := range inp[i] {
out <- inp[i][j]
}
}
}()
return out
}
// ChanReadSeekerFuncNok returns a channel to receive all results of act until nok before close.
func ChanReadSeekerFuncNok(act func() (io.ReadSeeker, bool)) <-chan io.ReadSeeker {
out := make(chan io.ReadSeeker)
go func() {
defer close(out)
for {
res, ok := act() // Apply action
if !ok {
return
}
out <- res
}
}()
return out
}
// ChanReadSeekerFuncErr returns a channel to receive all results of act until err != nil before close.
func ChanReadSeekerFuncErr(act func() (io.ReadSeeker, error)) <-chan io.ReadSeeker {
out := make(chan io.ReadSeeker)
go func() {
defer close(out)
for {
res, err := act() // Apply action
if err != nil {
return
}
out <- res
}
}()
return out
}
// JoinReadSeeker sends inputs on the given out channel and returns a done channel to receive one signal when inp has been drained
func JoinReadSeeker(out chan<- io.ReadSeeker, inp ...io.ReadSeeker) chan struct{} {
done := make(chan struct{})
go func() {
defer close(done)
for i := range inp {
out <- inp[i]
}
done <- struct{}{}
}()
return done
}
// JoinReadSeekerSlice sends inputs on the given out channel and returns a done channel to receive one signal when inp has been drained
func JoinReadSeekerSlice(out chan<- io.ReadSeeker, inp ...[]io.ReadSeeker) chan struct{} {
done := make(chan struct{})
go func() {
defer close(done)
for i := range inp {
for j := range inp[i] {
out <- inp[i][j]
}
}
done <- struct{}{}
}()
return done
}
// JoinReadSeekerChan sends inputs on the given out channel and returns a done channel to receive one signal when inp has been drained
func JoinReadSeekerChan(out chan<- io.ReadSeeker, inp <-chan io.ReadSeeker) chan struct{} {
done := make(chan struct{})
go func() {
defer close(done)
for i := range inp {
out <- i
}
done <- struct{}{}
}()
return done
}
// DoneReadSeeker returns a channel to receive one signal before close after inp has been drained.
func DoneReadSeeker(inp <-chan io.ReadSeeker) chan struct{} {
done := make(chan struct{})
go func() {
defer close(done)
for i := range inp {
_ = i // Drain inp
}
done <- struct{}{}
}()
return done
}
// DoneReadSeekerSlice returns a channel which will receive a slice
// of all the ReadSeekers received on inp channel before close.
// Unlike DoneReadSeeker, a full slice is sent once, not just an event.
func DoneReadSeekerSlice(inp <-chan io.ReadSeeker) chan []io.ReadSeeker {
done := make(chan []io.ReadSeeker)
go func() {
defer close(done)
ReadSeekerS := []io.ReadSeeker{}
for i := range inp {
ReadSeekerS = append(ReadSeekerS, i)
}
done <- ReadSeekerS
}()
return done
}
// DoneReadSeekerFunc returns a channel to receive one signal before close after act has been applied to all inp.
func DoneReadSeekerFunc(inp <-chan io.ReadSeeker, act func(a io.ReadSeeker)) chan struct{} {
done := make(chan struct{})
if act == nil {
act = func(a io.ReadSeeker) { return }
}
go func() {
defer close(done)
for i := range inp {
act(i) // Apply action
}
done <- struct{}{}
}()
return done
}
// PipeReadSeekerBuffer returns a buffered channel with capacity cap to receive all inp before close.
func PipeReadSeekerBuffer(inp <-chan io.ReadSeeker, cap int) chan io.ReadSeeker {
out := make(chan io.ReadSeeker, cap)
go func() {
defer close(out)
for i := range inp {
out <- i
}
}()
return out
}
// PipeReadSeekerFunc returns a channel to receive every result of act applied to inp before close.
// Note: it 'could' be PipeReadSeekerMap for functional people,
// but 'map' has a very different meaning in go lang.
func PipeReadSeekerFunc(inp <-chan io.ReadSeeker, act func(a io.ReadSeeker) io.ReadSeeker) chan io.ReadSeeker {
out := make(chan io.ReadSeeker)
if act == nil {
act = func(a io.ReadSeeker) io.ReadSeeker { return a }
}
go func() {
defer close(out)
for i := range inp {
out <- act(i)
}
}()
return out
}
// PipeReadSeekerFork returns two channels to receive every result of inp before close.
// Note: Yes, it is a VERY simple fanout - but sometimes all You need.
func PipeReadSeekerFork(inp <-chan io.ReadSeeker) (chan io.ReadSeeker, chan io.ReadSeeker) {
out1 := make(chan io.ReadSeeker)
out2 := make(chan io.ReadSeeker)
go func() {
defer close(out1)
defer close(out2)
for i := range inp {
out1 <- i
out2 <- i
}
}()
return out1, out2
}
// ReadSeekerTube is the signature for a pipe function.
type ReadSeekerTube func(inp <-chan io.ReadSeeker, out <-chan io.ReadSeeker)
// ReadSeekerDaisy returns a channel to receive all inp after having passed thru tube.
func ReadSeekerDaisy(inp <-chan io.ReadSeeker, tube ReadSeekerTube) (out <-chan io.ReadSeeker) {
cha := make(chan io.ReadSeeker)
go tube(inp, cha)
return cha
}
// ReadSeekerDaisyChain returns a channel to receive all inp after having passed thru all tubes.
func ReadSeekerDaisyChain(inp <-chan io.ReadSeeker, tubes ...ReadSeekerTube) (out <-chan io.ReadSeeker) {
cha := inp
for i := range tubes {
cha = ReadSeekerDaisy(cha, tubes[i])
}
return cha
}
/*
func sendOneInto(snd chan<- int) {
defer close(snd)
snd <- 1 // send a 1
}
func sendTwoInto(snd chan<- int) {
defer close(snd)
snd <- 1 // send a 1
snd <- 2 // send a 2
}
var fun = func(left chan<- int, right <-chan int) { left <- 1 + <-right }
func main() {
leftmost := make(chan int)
right := daisyChain(leftmost, fun, 10000) // the chain - right to left!
go sendTwoInto(right)
fmt.Println(<-leftmost)
}
*/