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0811108670
For make with a type parameter argument, the structural type of the type parameter's constraint determines what make is making. Change-Id: I3b48f8ce3236b7624e0638b5f5be208c5915c987 Reviewed-on: https://go-review.googlesource.com/c/go/+/339899 Trust: Robert Griesemer <gri@golang.org> Run-TryBot: Robert Griesemer <gri@golang.org> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Robert Findley <rfindley@google.com>
112 lines
1.8 KiB
Go
112 lines
1.8 KiB
Go
// compile -G=3
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// Copyright 2020 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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// This file tests built-in calls on generic types.
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// derived and expanded from cmd/compile/internal/types2/testdata/check/builtins.go2
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package builtins
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// close
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type C0 interface{ int }
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type C1 interface{ chan int }
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type C2 interface{ chan int | <-chan int }
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type C3 interface{ chan int | chan float32 }
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type C4 interface{ chan int | chan<- int }
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type C5[T any] interface{ ~chan T | chan<- T }
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func f1[T C1](ch T) {
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close(ch)
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}
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func f2[T C3](ch T) {
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close(ch)
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}
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func f3[T C4](ch T) {
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close(ch)
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}
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func f4[T C5[X], X any](ch T) {
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close(ch)
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}
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// delete
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type M0 interface{ int }
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type M1 interface{ map[string]int }
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type M2 interface {
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map[string]int | map[string]float64
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}
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type M3 interface{ map[string]int | map[rune]int }
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type M4[K comparable, V any] interface{ map[K]V | map[rune]V }
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func g1[T M1](m T) {
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delete(m, "foo")
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}
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func g2[T M2](m T) {
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delete(m, "foo")
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}
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func g3[T M4[rune, V], V any](m T) {
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delete(m, 'k')
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}
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// make
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func m1[
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S1 interface{ []int },
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S2 interface{ []int | chan int },
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M1 interface{ map[string]int },
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M2 interface{ map[string]int | chan int },
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C1 interface{ chan int },
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C2 interface{ chan int | chan string },
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]() {
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type S0 []int
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_ = make([]int, 10)
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_ = make(S0, 10)
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_ = make(S1, 10)
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_ = make(S1, 10, 20)
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type M0 map[string]int
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_ = make(map[string]int)
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_ = make(M0)
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_ = make(M1)
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_ = make(M1, 10)
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type C0 chan int
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_ = make(chan int)
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_ = make(C0)
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_ = make(C1)
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_ = make(C1, 10)
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}
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// len/cap
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type Slice[T any] interface {
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[]T
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}
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func c1[T any, S Slice[T]]() {
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x := make(S, 5, 10)
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_ = len(x)
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_ = cap(x)
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}
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// append
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func a1[T any, S Slice[T]]() {
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x := make(S, 5)
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y := make(S, 2)
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var z T
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_ = append(x, y...)
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_ = append(x, z)
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}
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