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author | Keith Randall <khr@golang.org> | 2021-08-17 10:40:44 -0700 |
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committer | Keith Randall <khr@golang.org> | 2021-08-18 22:34:31 +0000 |
commit | 687f2acf6ae00226e8304e15f156f36e19ac971f (patch) | |
tree | 114173688ee5f9bc7406dac8df88dc8f06459b12 /test/typeparam/issue47740.go | |
parent | eda3de0f79f3008aed21c04df546efa2ace65683 (diff) | |
download | go-687f2acf6ae00226e8304e15f156f36e19ac971f.tar.gz go-687f2acf6ae00226e8304e15f156f36e19ac971f.zip |
cmd/compile: only use dictionaries for conversions to type parameters
Conversions to regular concrete types should not be rewritten during
stenciling.
Fixes #47740
Change-Id: I2b45e22f962dcd2e18bd6cc876ebc0f850860822
Reviewed-on: https://go-review.googlesource.com/c/go/+/342989
Trust: Keith Randall <khr@golang.org>
Trust: Dan Scales <danscales@google.com>
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
Diffstat (limited to 'test/typeparam/issue47740.go')
-rw-r--r-- | test/typeparam/issue47740.go | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/test/typeparam/issue47740.go b/test/typeparam/issue47740.go new file mode 100644 index 0000000000..a8c6839de3 --- /dev/null +++ b/test/typeparam/issue47740.go @@ -0,0 +1,37 @@ +// 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 Exp[Ty any] interface { + Eval() Ty +} + +type Lit[Ty any] Ty + +func (lit Lit[Ty]) Eval() Ty { return Ty(lit) } +func (lit Lit[Ty]) String() string { return fmt.Sprintf("(lit %v)", Ty(lit)) } + +type Eq[Ty any] struct { + a Exp[Ty] + b Exp[Ty] +} + +func (e Eq[Ty]) String() string { + return fmt.Sprintf("(eq %v %v)", e.a, e.b) +} + +var ( + e0 = Eq[int]{Lit[int](128), Lit[int](64)} + e1 = Eq[bool]{Lit[bool](true), Lit[bool](true)} +) + +func main() { + fmt.Printf("%v\n", e0) + fmt.Printf("%v\n", e1) +} |