mirror of
https://github.com/IBM/fp-go.git
synced 2025-08-10 22:31:32 +02:00
fix: use code generation instead of hardcoded variants
Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com>
This commit is contained in:
Dr. Carsten Leue
223
cli/pipe.go
Normal file
223
cli/pipe.go
Normal file
@@ -0,0 +1,223 @@
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package cli
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import (
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"fmt"
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"log"
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"os"
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"path/filepath"
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"time"
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C "github.com/urfave/cli/v2"
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)
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const (
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keyCount = "count"
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)
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func generateNullary(f *os.File, i int) {
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// Create the nullary version
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fmt.Fprintf(f, "\n// Nullary%d creates a parameter less function from a parameter less function and %d functions. When executed the first parameter less function gets executed and then the result is piped through the remaining functions\n", i, i-1)
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fmt.Fprintf(f, "func Nullary%d[", i)
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for j := 1; j <= i; j++ {
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if j > 1 {
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fmt.Fprintf(f, ", ")
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}
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fmt.Fprintf(f, "T%d", j)
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}
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fmt.Fprintf(f, " any](f1 func() T1")
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for j := 2; j <= i; j++ {
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fmt.Fprintf(f, ", f%d func(T%d) T%d", j, j-1, j)
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}
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fmt.Fprintf(f, ") func() T%d {\n", i)
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fmt.Fprintf(f, " return func() T%d {\n", i)
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fmt.Fprintf(f, " return Pipe%d(f1()", i-1)
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for j := 2; j <= i; j++ {
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fmt.Fprintf(f, ", f%d", j)
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}
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fmt.Fprintf(f, ")\n")
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fmt.Fprintln(f, " }")
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fmt.Fprintln(f, "}")
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}
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func generateFlow(f *os.File, i int) {
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// Create the flow version
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fmt.Fprintf(f, "\n// Flow%d creates a function that takes an initial value t0 and sucessively applies %d functions where the input of a function is the return value of the previous function\n// The final return value is the result of the last function application\n", i, i)
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fmt.Fprintf(f, "func Flow%d[T0", i)
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for j := 1; j <= i; j++ {
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fmt.Fprintf(f, ", T%d", j)
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}
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fmt.Fprintf(f, " any](")
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for j := 1; j <= i; j++ {
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if j > 1 {
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fmt.Fprintf(f, ", ")
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}
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fmt.Fprintf(f, "f%d func(T%d) T%d", j, j-1, j)
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}
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fmt.Fprintf(f, ") func(T0) T%d {\n", i)
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fmt.Fprintf(f, " return func(t0 T0) T%d {\n", i)
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fmt.Fprintf(f, " return Pipe%d(t0", i)
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for j := 1; j <= i; j++ {
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fmt.Fprintf(f, ", f%d", j)
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}
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fmt.Fprintf(f, ")\n")
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fmt.Fprintln(f, " }")
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fmt.Fprintln(f, "}")
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}
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func generatePipe(f *os.File, i int) {
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// Create the pipe version
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fmt.Fprintf(f, "\n// Pipe%d takes an initial value t0 and sucessively applies %d functions where the input of a function is the return value of the previous function\n// The final return value is the result of the last function application\n", i, i)
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fmt.Fprintf(f, "func Pipe%d[T0", i)
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for j := 1; j <= i; j++ {
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fmt.Fprintf(f, ", T%d", j)
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}
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fmt.Fprintf(f, " any](t0 T0")
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for j := 1; j <= i; j++ {
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fmt.Fprintf(f, ", f%d func(T%d) T%d", j, j-1, j)
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}
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fmt.Fprintf(f, ") T%d {\n", i)
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for j := 1; j <= i; j++ {
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fmt.Fprintf(f, " t%d := f%d(t%d)\n", j, j, j-1)
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}
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fmt.Fprintf(f, " return t%d\n", i)
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fmt.Fprintln(f, "}")
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}
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func recurseCurry(f *os.File, indent string, total, count int) {
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if count == 1 {
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fmt.Fprintf(f, "%sreturn func(t%d T%d) T%d {\n", indent, total-1, total-1, total)
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fmt.Fprintf(f, "%s return f(t0", indent)
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for i := 1; i < total; i++ {
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fmt.Fprintf(f, ", t%d", i)
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}
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fmt.Fprintf(f, ")\n")
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fmt.Fprintf(f, "%s}\n", indent)
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} else {
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fmt.Fprintf(f, "%sreturn", indent)
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for i := total - count + 1; i <= total; i++ {
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fmt.Fprintf(f, " func(t%d T%d)", i-1, i-1)
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}
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fmt.Fprintf(f, " T%d {\n", total)
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recurseCurry(f, fmt.Sprintf(" %s", indent), total, count-1)
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fmt.Fprintf(f, "%s}\n", indent)
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}
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}
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func generateCurry(f *os.File, i int) {
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// Create the curry version
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fmt.Fprintf(f, "\n// Curry%d takes a function with %d parameters and returns a cascade of functions each taking only one parameter.\n// The inverse function is [Uncurry%d]\n", i, i, i)
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fmt.Fprintf(f, "func Curry%d[T0", i)
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for j := 1; j <= i; j++ {
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fmt.Fprintf(f, ", T%d", j)
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}
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fmt.Fprintf(f, " any](f func(T0")
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for j := 2; j <= i; j++ {
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fmt.Fprintf(f, ", T%d", j-1)
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}
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fmt.Fprintf(f, ") T%d) func(T0)", i)
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for j := 2; j <= i; j++ {
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fmt.Fprintf(f, " func(T%d)", j-1)
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}
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fmt.Fprintf(f, " T%d {\n", i)
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recurseCurry(f, " ", i, i)
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fmt.Fprintf(f, "}\n")
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}
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func generateUncurry(f *os.File, i int) {
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// Create the uncurry version
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fmt.Fprintf(f, "\n// Uncurry%d takes a cascade of %d functions each taking only one parameter and returns a function with %d parameters .\n// The inverse function is [Curry%d]\n", i, i, i, i)
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fmt.Fprintf(f, "func Uncurry%d[T0", i)
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for j := 1; j <= i; j++ {
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fmt.Fprintf(f, ", T%d", j)
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}
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fmt.Fprintf(f, " any](f")
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for j := 1; j <= i; j++ {
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fmt.Fprintf(f, " func(T%d)", j-1)
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}
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fmt.Fprintf(f, " T%d) func(", i)
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for j := 1; j <= i; j++ {
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if j > 1 {
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fmt.Fprintf(f, ", ")
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}
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fmt.Fprintf(f, "T%d", j-1)
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}
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fmt.Fprintf(f, ") T%d {\n", i)
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fmt.Fprintf(f, " return func(")
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for j := 1; j <= i; j++ {
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if j > 1 {
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fmt.Fprintf(f, ", ")
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}
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fmt.Fprintf(f, "t%d T%d", j-1, j-1)
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}
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fmt.Fprintf(f, ") T%d {\n", i)
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fmt.Fprintf(f, " return f")
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for j := 1; j <= i; j++ {
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fmt.Fprintf(f, "(t%d)", j-1)
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}
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fmt.Fprintln(f)
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fmt.Fprintf(f, " }\n")
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fmt.Fprintf(f, "}\n")
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}
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func generateHelpers(count int) error {
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dir, err := os.Getwd()
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if err != nil {
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return err
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}
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absDir, err := filepath.Abs(dir)
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if err != nil {
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return err
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}
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pkg := filepath.Base(absDir)
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f, err := os.Create("gen.go")
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if err != nil {
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return err
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}
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defer f.Close()
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// log
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log.Printf("Generating code for package [%s] with [%d] repetitions ...", pkg, count)
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// some header
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fmt.Fprintln(f, "// Code generated by go generate; DO NOT EDIT.")
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fmt.Fprintln(f, "// This file was generated by robots at")
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fmt.Fprintf(f, "// %s\n", time.Now())
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fmt.Fprintf(f, "package %s\n", pkg)
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for i := 1; i <= count; i++ {
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// pipe
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generatePipe(f, i)
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// flow
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generateFlow(f, i)
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// nullary
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generateNullary(f, i)
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// curry
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generateCurry(f, i)
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// uncurry
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generateUncurry(f, i)
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}
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return nil
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}
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func PipeCommand() *C.Command {
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return &C.Command{
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Name: "pipe",
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Flags: []C.Flag{
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&C.IntFlag{
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Name: keyCount,
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Value: 20,
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Usage: "Number of variations to create",
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},
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},
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Action: func(ctx *C.Context) error {
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return generateHelpers(ctx.Int(keyCount))
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},
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}
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}
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@@ -1,77 +0,0 @@
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package function
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func Curry1[T1, R any](f func(T1) R) func(T1) R {
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return f
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}
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func Curry2[T1, T2, R any](f func(T1, T2) R) func(T1) func(T2) R {
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return func(t1 T1) func(T2) R {
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return func(t2 T2) R {
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return f(t1, t2)
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}
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}
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}
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func Curry3[T1, T2, T3, R any](f func(T1, T2, T3) R) func(T1) func(T2) func(T3) R {
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return func(t1 T1) func(T2) func(T3) R {
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return func(t2 T2) func(T3) R {
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return func(t3 T3) R {
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return f(t1, t2, t3)
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}
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}
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}
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}
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func Curry4[T1, T2, T3, T4, R any](f func(T1, T2, T3, T4) R) func(T1) func(T2) func(T3) func(T4) R {
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return func(t1 T1) func(T2) func(T3) func(T4) R {
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return func(t2 T2) func(T3) func(T4) R {
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return func(t3 T3) func(T4) R {
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return func(t4 T4) R {
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return f(t1, t2, t3, t4)
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}
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}
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}
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}
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}
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func Curry5[T1, T2, T3, T4, T5, R any](f func(T1, T2, T3, T4, T5) R) func(T1) func(T2) func(T3) func(T4) func(T5) R {
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return func(t1 T1) func(T2) func(T3) func(T4) func(T5) R {
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return func(t2 T2) func(T3) func(T4) func(T5) R {
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return func(t3 T3) func(T4) func(T5) R {
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return func(t4 T4) func(T5) R {
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return func(t5 T5) R {
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return f(t1, t2, t3, t4, t5)
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}
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}
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}
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}
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}
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}
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func Uncurry1[T1, R any](f func(T1) R) func(T1) R {
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return f
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}
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func Uncurry2[T1, T2, R any](f func(T1) func(T2) R) func(T1, T2) R {
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return func(t1 T1, t2 T2) R {
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return f(t1)(t2)
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}
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}
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func Uncurry3[T1, T2, T3, R any](f func(T1) func(T2) func(T3) R) func(T1, T2, T3) R {
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return func(t1 T1, t2 T2, t3 T3) R {
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return f(t1)(t2)(t3)
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}
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}
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func Uncurry4[T1, T2, T3, T4, R any](f func(T1) func(T2) func(T3) func(T4) R) func(T1, T2, T3, T4) R {
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return func(t1 T1, t2 T2, t3 T3, t4 T4) R {
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return f(t1)(t2)(t3)(t4)
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}
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}
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func Uncurry5[T1, T2, T3, T4, T5, R any](f func(T1) func(T2) func(T3) func(T4) func(T5) R) func(T1, T2, T3, T4, T5) R {
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return func(t1 T1, t2 T2, t3 T3, t4 T4, t5 T5) R {
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return f(t1)(t2)(t3)(t4)(t5)
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}
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}
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3
function/doc.go
Normal file
3
function/doc.go
Normal file
@@ -0,0 +1,3 @@
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package function
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//go:generate go run .. pipe --count 20
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@@ -1,147 +1,7 @@
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package function
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// what a mess, golang does not have proper types ...
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func Pipe1[A, R any](a A, f1 func(a A) R) R {
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// return f1(a)
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r1 := f1(a)
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return r1
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}
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func Pipe2[A, T1, R any](a A, f1 func(a A) T1, f2 func(t1 T1) R) R {
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// return f2(f1(a))
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r1 := f1(a)
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r2 := f2(r1)
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return r2
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}
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func Pipe3[A, T1, T2, R any](a A, f1 func(a A) T1, f2 func(t1 T1) T2, f3 func(t2 T2) R) R {
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// return f3(f2(f1(a)))
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r1 := f1(a)
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r2 := f2(r1)
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r3 := f3(r2)
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return r3
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}
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func Pipe4[A, T1, T2, T3, R any](a A, f1 func(a A) T1, f2 func(t1 T1) T2, f3 func(t2 T2) T3, f4 func(t3 T3) R) R {
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// return f4(f3(f2(f1(a))))
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r1 := f1(a)
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r2 := f2(r1)
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r3 := f3(r2)
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r4 := f4(r3)
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return r4
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}
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func Pipe5[A, T1, T2, T3, T4, R any](a A, f1 func(a A) T1, f2 func(t1 T1) T2, f3 func(t2 T2) T3, f4 func(t3 T3) T4, f5 func(t4 T4) R) R {
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// return f5(f4(f3(f2(f1(a)))))
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r1 := f1(a)
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r2 := f2(r1)
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r3 := f3(r2)
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r4 := f4(r3)
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r5 := f5(r4)
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return r5
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}
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func Pipe6[A, T1, T2, T3, T4, T5, R any](a A, f1 func(a A) T1, f2 func(t1 T1) T2, f3 func(t2 T2) T3, f4 func(t3 T3) T4, f5 func(t4 T4) T5, f6 func(t5 T5) R) R {
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// return f6(f5(f4(f3(f2(f1(a))))))
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r1 := f1(a)
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r2 := f2(r1)
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r3 := f3(r2)
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r4 := f4(r3)
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r5 := f5(r4)
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r6 := f6(r5)
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return r6
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}
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func Pipe7[A, T1, T2, T3, T4, T5, T6, R any](a A, f1 func(a A) T1, f2 func(t1 T1) T2, f3 func(t2 T2) T3, f4 func(t3 T3) T4, f5 func(t4 T4) T5, f6 func(t5 T5) T6, f7 func(t6 T6) R) R {
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// return f7(f6(f5(f4(f3(f2(f1(a)))))))
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r1 := f1(a)
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r2 := f2(r1)
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r3 := f3(r2)
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r4 := f4(r3)
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r5 := f5(r4)
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r6 := f6(r5)
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r7 := f7(r6)
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return r7
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}
|
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|
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func Pipe8[A, T1, T2, T3, T4, T5, T6, T7, R any](a A, f1 func(a A) T1, f2 func(t1 T1) T2, f3 func(t2 T2) T3, f4 func(t3 T3) T4, f5 func(t4 T4) T5, f6 func(t5 T5) T6, f7 func(t6 T6) T7, f8 func(t7 T7) R) R {
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// return f8(f7(f6(f5(f4(f3(f2(f1(a))))))))
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r1 := f1(a)
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r2 := f2(r1)
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r3 := f3(r2)
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r4 := f4(r3)
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r5 := f5(r4)
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r6 := f6(r5)
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r7 := f7(r6)
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r8 := f8(r7)
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return r8
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}
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func Pipe9[A, T1, T2, T3, T4, T5, T6, T7, T8, R any](a A, f1 func(a A) T1, f2 func(t1 T1) T2, f3 func(t2 T2) T3, f4 func(t3 T3) T4, f5 func(t4 T4) T5, f6 func(t5 T5) T6, f7 func(t6 T6) T7, f8 func(t7 T7) T8, f9 func(t8 T8) R) R {
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// return f9(f8(f7(f6(f5(f4(f3(f2(f1(a)))))))))
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r1 := f1(a)
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r2 := f2(r1)
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r3 := f3(r2)
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r4 := f4(r3)
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r5 := f5(r4)
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r6 := f6(r5)
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r7 := f7(r6)
|
||||
r8 := f8(r7)
|
||||
r9 := f9(r8)
|
||||
return r9
|
||||
}
|
||||
|
||||
func Flow1[A, R any](f1 func(a A) R) func(a A) R {
|
||||
return f1
|
||||
}
|
||||
|
||||
func Flow2[A, T1, R any](f1 func(a A) T1, f2 func(t1 T1) R) func(a A) R {
|
||||
return func(a A) R {
|
||||
return Pipe2(a, f1, f2)
|
||||
}
|
||||
}
|
||||
|
||||
func Flow3[A, T1, T2, R any](f1 func(a A) T1, f2 func(t1 T1) T2, f3 func(t2 T2) R) func(a A) R {
|
||||
return func(a A) R {
|
||||
return Pipe3(a, f1, f2, f3)
|
||||
}
|
||||
}
|
||||
|
||||
func Flow4[A, T1, T2, T3, R any](f1 func(a A) T1, f2 func(t1 T1) T2, f3 func(t2 T2) T3, f4 func(t3 T3) R) func(a A) R {
|
||||
return func(a A) R {
|
||||
return Pipe4(a, f1, f2, f3, f4)
|
||||
}
|
||||
}
|
||||
|
||||
func Flow5[A, T1, T2, T3, T4, R any](f1 func(a A) T1, f2 func(t1 T1) T2, f3 func(t2 T2) T3, f4 func(t3 T3) T4, f5 func(t4 T4) R) func(a A) R {
|
||||
return func(a A) R {
|
||||
return Pipe5(a, f1, f2, f3, f4, f5)
|
||||
}
|
||||
}
|
||||
|
||||
func Flow6[A, T1, T2, T3, T4, T5, R any](f1 func(a A) T1, f2 func(t1 T1) T2, f3 func(t2 T2) T3, f4 func(t3 T3) T4, f5 func(t4 T4) T5, f6 func(t5 T5) R) func(a A) R {
|
||||
return func(a A) R {
|
||||
return Pipe6(a, f1, f2, f3, f4, f5, f6)
|
||||
}
|
||||
}
|
||||
|
||||
func Flow7[A, T1, T2, T3, T4, T5, T6, R any](f1 func(a A) T1, f2 func(t1 T1) T2, f3 func(t2 T2) T3, f4 func(t3 T3) T4, f5 func(t4 T4) T5, f6 func(t5 T5) T6, f7 func(t6 T6) R) func(a A) R {
|
||||
return func(a A) R {
|
||||
return Pipe7(a, f1, f2, f3, f4, f5, f6, f7)
|
||||
}
|
||||
}
|
||||
|
||||
func Flow8[A, T1, T2, T3, T4, T5, T6, T7, R any](f1 func(a A) T1, f2 func(t1 T1) T2, f3 func(t2 T2) T3, f4 func(t3 T3) T4, f5 func(t4 T4) T5, f6 func(t5 T5) T6, f7 func(t6 T6) T7, f8 func(t7 T7) R) func(a A) R {
|
||||
return func(a A) R {
|
||||
return Pipe8(a, f1, f2, f3, f4, f5, f6, f7, f8)
|
||||
}
|
||||
}
|
||||
|
||||
func Flow9[A, T1, T2, T3, T4, T5, T6, T7, T8, R any](f1 func(a A) T1, f2 func(t1 T1) T2, f3 func(t2 T2) T3, f4 func(t3 T3) T4, f5 func(t4 T4) T5, f6 func(t5 T5) T6, f7 func(t6 T6) T7, f8 func(t7 T7) T8, f9 func(t8 T8) R) func(a A) R {
|
||||
return func(a A) R {
|
||||
return Pipe9(a, f1, f2, f3, f4, f5, f6, f7, f8, f9)
|
||||
}
|
||||
func Pipe0[T0 any](t0 T0) T0 {
|
||||
return t0
|
||||
}
|
||||
|
||||
// Identity returns the value 'a'
|
||||
@@ -194,25 +54,3 @@ func First[T1, T2 any](t1 T1, _ T2) T1 {
|
||||
func Second[T1, T2 any](_ T1, t2 T2) T2 {
|
||||
return t2
|
||||
}
|
||||
|
||||
func Nullary1[R any](f1 func() R) func() R {
|
||||
return f1
|
||||
}
|
||||
|
||||
func Nullary2[T1, R any](f1 func() T1, f2 func(t1 T1) R) func() R {
|
||||
return func() R {
|
||||
return Pipe1(f1(), f2)
|
||||
}
|
||||
}
|
||||
|
||||
func Nullary3[T1, T2, R any](f1 func() T1, f2 func(t1 T1) T2, f3 func(t2 T2) R) func() R {
|
||||
return func() R {
|
||||
return Pipe2(f1(), f2, f3)
|
||||
}
|
||||
}
|
||||
|
||||
func Nullary4[T1, T2, T3, R any](f1 func() T1, f2 func(t1 T1) T2, f3 func(t2 T2) T3, f4 func(t3 T3) R) func() R {
|
||||
return func() R {
|
||||
return Pipe3(f1(), f2, f3, f4)
|
||||
}
|
||||
}
|
||||
|
||||
1334
function/gen.go
Normal file
1334
function/gen.go
Normal file
File diff suppressed because it is too large
Load Diff
4
go.mod
4
go.mod
@@ -5,8 +5,12 @@ go 1.20
|
||||
require github.com/stretchr/testify v1.8.4
|
||||
|
||||
require (
|
||||
github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
|
||||
github.com/davecgh/go-spew v1.1.1 // indirect
|
||||
github.com/pmezard/go-difflib v1.0.0 // indirect
|
||||
github.com/russross/blackfriday/v2 v2.1.0 // indirect
|
||||
github.com/stretchr/objx v0.5.0 // indirect
|
||||
github.com/urfave/cli/v2 v2.25.7 // indirect
|
||||
github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
|
||||
gopkg.in/yaml.v3 v3.0.1 // indirect
|
||||
)
|
||||
|
||||
8
go.sum
8
go.sum
@@ -1,8 +1,12 @@
|
||||
github.com/cpuguy83/go-md2man/v2 v2.0.2 h1:p1EgwI/C7NhT0JmVkwCD2ZBK8j4aeHQX2pMHHBfMQ6w=
|
||||
github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
|
||||
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
|
||||
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
|
||||
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
|
||||
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
|
||||
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
|
||||
github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf35Ld67mk=
|
||||
github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
|
||||
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
|
||||
github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
|
||||
github.com/stretchr/objx v0.5.0 h1:1zr/of2m5FGMsad5YfcqgdqdWrIhu+EBEJRhR1U7z/c=
|
||||
@@ -11,6 +15,10 @@ github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
|
||||
github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
|
||||
github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
|
||||
github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
|
||||
github.com/urfave/cli/v2 v2.25.7 h1:VAzn5oq403l5pHjc4OhD54+XGO9cdKVL/7lDjF+iKUs=
|
||||
github.com/urfave/cli/v2 v2.25.7/go.mod h1:8qnjx1vcq5s2/wpsqoZFndg2CE5tNFyrTvS6SinrnYQ=
|
||||
github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 h1:bAn7/zixMGCfxrRTfdpNzjtPYqr8smhKouy9mxVdGPU=
|
||||
github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673/go.mod h1:N3UwUGtsrSj3ccvlPHLoLsHnpR27oXr4ZE984MbSER8=
|
||||
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
|
||||
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
|
||||
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
|
||||
|
||||
30
main.go
30
main.go
@@ -1,25 +1,25 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"log"
|
||||
"os"
|
||||
|
||||
O "github.com/ibm/fp-go/option"
|
||||
"github.com/ibm/fp-go/cli"
|
||||
|
||||
C "github.com/urfave/cli/v2"
|
||||
)
|
||||
|
||||
func isNonemptyString(val string) bool {
|
||||
return val != ""
|
||||
}
|
||||
|
||||
// var O = OptionModule{of: O_of, some: O_of, none: none, mp: OMap}
|
||||
|
||||
func main() {
|
||||
|
||||
opt_string := O.FromPredicate(isNonemptyString)
|
||||
|
||||
stringO1 := opt_string("Carsten")
|
||||
stringO2 := opt_string("")
|
||||
|
||||
fmt.Println(stringO1)
|
||||
fmt.Println(stringO2)
|
||||
app := &C.App{
|
||||
Name: "fp-go",
|
||||
Usage: "Code generation for fp-go",
|
||||
Commands: []*C.Command{
|
||||
cli.PipeCommand(),
|
||||
},
|
||||
}
|
||||
|
||||
if err := app.Run(os.Args); err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
}
|
||||
|
||||
1
option/doc.go
Normal file
1
option/doc.go
Normal file
@@ -0,0 +1 @@
|
||||
package option
|
||||
Reference in New Issue
Block a user