/
ChanFile.dot.go
267 lines (243 loc) · 6.61 KB
/
ChanFile.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 os
// This file was generated with dotgo
// DO NOT EDIT - Improve the pattern!
import (
"os"
)
// MakeFileChan returns a new open channel
// (simply a 'chan *os.File' that is).
//
// Note: No 'File-producer' is launched here yet! (as is in all the other functions).
//
// This is useful to easily create corresponding variables such as
//
// var myFilePipelineStartsHere := MakeFileChan()
// // ... lot's of code to design and build Your favourite "myFileWorkflowPipeline"
// // ...
// // ... *before* You start pouring data into it, e.g. simply via:
// for drop := range water {
// myFilePipelineStartsHere <- drop
// }
// close(myFilePipelineStartsHere)
//
// 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 PipeFileBuffer) the channel is unbuffered.
//
func MakeFileChan() chan *os.File {
return make(chan *os.File)
}
// ChanFile returns a channel to receive all inputs before close.
func ChanFile(inp ...*os.File) chan *os.File {
out := make(chan *os.File)
go func() {
defer close(out)
for i := range inp {
out <- inp[i]
}
}()
return out
}
// ChanFileSlice returns a channel to receive all inputs before close.
func ChanFileSlice(inp ...[]*os.File) chan *os.File {
out := make(chan *os.File)
go func() {
defer close(out)
for i := range inp {
for j := range inp[i] {
out <- inp[i][j]
}
}
}()
return out
}
// ChanFileFuncNok returns a channel to receive all results of act until nok before close.
func ChanFileFuncNok(act func() (*os.File, bool)) <-chan *os.File {
out := make(chan *os.File)
go func() {
defer close(out)
for {
res, ok := act() // Apply action
if !ok {
return
}
out <- res
}
}()
return out
}
// ChanFileFuncErr returns a channel to receive all results of act until err != nil before close.
func ChanFileFuncErr(act func() (*os.File, error)) <-chan *os.File {
out := make(chan *os.File)
go func() {
defer close(out)
for {
res, err := act() // Apply action
if err != nil {
return
}
out <- res
}
}()
return out
}
// JoinFile sends inputs on the given out channel and returns a done channel to receive one signal when inp has been drained
func JoinFile(out chan<- *os.File, inp ...*os.File) chan struct{} {
done := make(chan struct{})
go func() {
defer close(done)
for i := range inp {
out <- inp[i]
}
done <- struct{}{}
}()
return done
}
// JoinFileSlice sends inputs on the given out channel and returns a done channel to receive one signal when inp has been drained
func JoinFileSlice(out chan<- *os.File, inp ...[]*os.File) 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
}
// JoinFileChan sends inputs on the given out channel and returns a done channel to receive one signal when inp has been drained
func JoinFileChan(out chan<- *os.File, inp <-chan *os.File) chan struct{} {
done := make(chan struct{})
go func() {
defer close(done)
for i := range inp {
out <- i
}
done <- struct{}{}
}()
return done
}
// DoneFile returns a channel to receive one signal before close after inp has been drained.
func DoneFile(inp <-chan *os.File) chan struct{} {
done := make(chan struct{})
go func() {
defer close(done)
for i := range inp {
_ = i // Drain inp
}
done <- struct{}{}
}()
return done
}
// DoneFileSlice returns a channel which will receive a slice
// of all the Files received on inp channel before close.
// Unlike DoneFile, a full slice is sent once, not just an event.
func DoneFileSlice(inp <-chan *os.File) chan []*os.File {
done := make(chan []*os.File)
go func() {
defer close(done)
FileS := []*os.File{}
for i := range inp {
FileS = append(FileS, i)
}
done <- FileS
}()
return done
}
// DoneFileFunc returns a channel to receive one signal before close after act has been applied to all inp.
func DoneFileFunc(inp <-chan *os.File, act func(a *os.File)) chan struct{} {
done := make(chan struct{})
if act == nil {
act = func(a *os.File) { return }
}
go func() {
defer close(done)
for i := range inp {
act(i) // Apply action
}
done <- struct{}{}
}()
return done
}
// PipeFileBuffer returns a buffered channel with capacity cap to receive all inp before close.
func PipeFileBuffer(inp <-chan *os.File, cap int) chan *os.File {
out := make(chan *os.File, cap)
go func() {
defer close(out)
for i := range inp {
out <- i
}
}()
return out
}
// PipeFileFunc returns a channel to receive every result of act applied to inp before close.
// Note: it 'could' be PipeFileMap for functional people,
// but 'map' has a very different meaning in go lang.
func PipeFileFunc(inp <-chan *os.File, act func(a *os.File) *os.File) chan *os.File {
out := make(chan *os.File)
if act == nil {
act = func(a *os.File) *os.File { return a }
}
go func() {
defer close(out)
for i := range inp {
out <- act(i)
}
}()
return out
}
// PipeFileFork 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 PipeFileFork(inp <-chan *os.File) (chan *os.File, chan *os.File) {
out1 := make(chan *os.File)
out2 := make(chan *os.File)
go func() {
defer close(out1)
defer close(out2)
for i := range inp {
out1 <- i
out2 <- i
}
}()
return out1, out2
}
// FileTube is the signature for a pipe function.
type FileTube func(inp <-chan *os.File, out <-chan *os.File)
// FileDaisy returns a channel to receive all inp after having passed thru tube.
func FileDaisy(inp <-chan *os.File, tube FileTube) (out <-chan *os.File) {
cha := make(chan *os.File)
go tube(inp, cha)
return cha
}
// FileDaisyChain returns a channel to receive all inp after having passed thru all tubes.
func FileDaisyChain(inp <-chan *os.File, tubes ...FileTube) (out <-chan *os.File) {
cha := inp
for i := range tubes {
cha = FileDaisy(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)
}
*/