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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 19:23:18 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 19:23:18 +0000 |
commit | 43a123c1ae6613b3efeed291fa552ecd909d3acf (patch) | |
tree | fd92518b7024bc74031f78a1cf9e454b65e73665 /test/typeparam/mapimp.dir | |
parent | Initial commit. (diff) | |
download | golang-1.20-upstream.tar.xz golang-1.20-upstream.zip |
Adding upstream version 1.20.14.upstream/1.20.14upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'test/typeparam/mapimp.dir')
-rw-r--r-- | test/typeparam/mapimp.dir/a.go | 15 | ||||
-rw-r--r-- | test/typeparam/mapimp.dir/main.go | 28 |
2 files changed, 43 insertions, 0 deletions
diff --git a/test/typeparam/mapimp.dir/a.go b/test/typeparam/mapimp.dir/a.go new file mode 100644 index 0000000..cbfa80a --- /dev/null +++ b/test/typeparam/mapimp.dir/a.go @@ -0,0 +1,15 @@ +// Copyright 2021 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package a + +// Map calls the function f on every element of the slice s, +// returning a new slice of the results. +func Mapper[F, T any](s []F, f func(F) T) []T { + r := make([]T, len(s)) + for i, v := range s { + r[i] = f(v) + } + return r +} diff --git a/test/typeparam/mapimp.dir/main.go b/test/typeparam/mapimp.dir/main.go new file mode 100644 index 0000000..8a56ce2 --- /dev/null +++ b/test/typeparam/mapimp.dir/main.go @@ -0,0 +1,28 @@ +// Copyright 2021 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package main + +import ( + "./a" + "fmt" + "reflect" + "strconv" +) + +func main() { + got := a.Mapper([]int{1, 2, 3}, strconv.Itoa) + want := []string{"1", "2", "3"} + if !reflect.DeepEqual(got, want) { + panic(fmt.Sprintf("got %s, want %s", got, want)) + } + + fgot := a.Mapper([]float64{2.5, 2.3, 3.5}, func(f float64) string { + return strconv.FormatFloat(f, 'f', -1, 64) + }) + fwant := []string{"2.5", "2.3", "3.5"} + if !reflect.DeepEqual(fgot, fwant) { + panic(fmt.Sprintf("got %s, want %s", fgot, fwant)) + } +} |