go subdict 源码
golang subdict 代码
文件路径：/test/typeparam/subdict.go
// run
// 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.
// Test cases where a main dictionary is needed inside a generic function/method, because
// we are calling a method on a fully-instantiated type or a fully-instantiated function.
// (probably not common situations, of course)
package main
import (
"fmt"
)
type C comparable
type value[T C] struct {
val T
}
func (v *value[T]) test(def T) bool {
return (v.val == def)
}
func (v *value[T]) get(def T) T {
var c value[int]
if c.test(32) {
return def
} else if v.test(def) {
return def
} else {
return v.val
}
}
func main() {
var s value[string]
if got, want := s.get("ab"), ""; got != want {
panic(fmt.Sprintf("get() == %d, want %d", got, want))
}
}
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