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mirror of https://github.com/golang/go synced 2024-11-13 14:00:27 -07:00
go/test/typeparam/min.go
Dan Scales c0aa7bd760 [dev.typeparams] cmd/compile: small fixes for stenciling
- 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>
2021-02-11 21:46:39 +00:00

42 lines
757 B
Go

// run -gcflags=-G=3
// 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 (
"fmt"
)
type Ordered interface {
type int, int64, float64
}
func min[T Ordered](x, y T) T {
if x < y {
return x
}
return y
}
func main() {
const want = 2
if got := min[int](2, 3); got != want {
panic(fmt.Sprintf("got %d, want %d", got, want))
}
if got := min(2, 3); got != want {
panic(fmt.Sprintf("want %d, got %d", want, got))
}
if got := min[float64](3.5, 2.0); got != want {
panic(fmt.Sprintf("got %d, want %d", got, want))
}
if got := min(3.5, 2.0); got != want {
panic(fmt.Sprintf("got %d, want %d", got, want))
}
}