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https://github.com/golang/go
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c0aa7bd760
- Create the stencil name using targ.Type.String(), which handles cases where, for example, a type argument is a pointer to a named type, etc. *obj. - Set name.Def properly for a new stenciled func (have the symbol point back to the associated function node). Will be required when exporting. - Add missing copying of Func field when making copies of Name nodes. (On purpose (it seems), Name nodes don't have a copy() function, so we have to copy all the needed fields explicitly.) - Deal with nil type in subster.node(), which is the type of the return value for a function that doesn't return anything. - Fix min to match standard want/go form, and add in float tests. Changed Got -> got in bunch of other typeparam tests. - Add new tests index.go, settable.go, and smallest.go (similar to examples in the type param proposal), some of which need the above changes. Change-Id: I09a72302bc1fd3635a326da92405222afa222e85 Reviewed-on: https://go-review.googlesource.com/c/go/+/291109 Trust: Dan Scales <danscales@google.com> Trust: Robert Griesemer <gri@golang.org> Run-TryBot: Dan Scales <danscales@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Robert Griesemer <gri@golang.org>
47 lines
941 B
Go
47 lines
941 B
Go
// run -gcflags=-G=3
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// Copyright 2021 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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import (
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"fmt"
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)
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// Index returns the index of x in s, or -1 if not found.
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func index[T comparable](s []T, x T) int {
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for i, v := range s {
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// v and x are type T, which has the comparable
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// constraint, so we can use == here.
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if v == x {
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return i
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}
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}
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return -1
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}
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type obj struct {
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x int
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}
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func main() {
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want := 2
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vec1 := []string{"ab", "cd", "ef"}
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if got := index(vec1, "ef"); got != want {
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panic(fmt.Sprintf("got %d, want %d", got, want))
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}
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vec2 := []byte{'c', '6', '@'}
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if got := index(vec2, '@'); got != want {
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panic(fmt.Sprintf("got %d, want %d", got, want))
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}
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vec3 := []*obj{&obj{2}, &obj{42}, &obj{1}}
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if got := index(vec3, vec3[2]); got != want {
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panic(fmt.Sprintf("got %d, want %d", got, want))
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}
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}
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