mirror of
https://github.com/golang/go
synced 2024-11-24 20:40:23 -07:00
e24977d231
The next CL will remove the -G flag, effectively hard-coding it to its current default (-G=3). Change-Id: Ib4743b529206928f9f1cca9fdb19989728327831 Reviewed-on: https://go-review.googlesource.com/c/go/+/388534 Reviewed-by: Keith Randall <khr@golang.org> Trust: Matthew Dempsky <mdempsky@google.com> Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
127 lines
1.8 KiB
Go
127 lines
1.8 KiB
Go
// run -gcflags="-l"
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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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// Test situations where functions/methods are not
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// immediately called and we need to capture the dictionary
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// required for later invocation.
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package main
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func main() {
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functions()
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methodExpressions()
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methodValues()
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interfaceMethods()
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globals()
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}
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func g0[T any](x T) {
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}
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func g1[T any](x T) T {
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return x
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}
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func g2[T any](x T) (T, T) {
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return x, x
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}
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func functions() {
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f0 := g0[int]
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f0(7)
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f1 := g1[int]
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is7(f1(7))
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f2 := g2[int]
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is77(f2(7))
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}
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func is7(x int) {
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if x != 7 {
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println(x)
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panic("assertion failed")
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}
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}
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func is77(x, y int) {
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if x != 7 || y != 7 {
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println(x, y)
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panic("assertion failed")
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}
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}
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type s[T any] struct {
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a T
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}
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func (x s[T]) g0() {
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}
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func (x s[T]) g1() T {
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return x.a
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}
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func (x s[T]) g2() (T, T) {
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return x.a, x.a
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}
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func methodExpressions() {
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x := s[int]{a: 7}
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f0 := s[int].g0
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f0(x)
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f1 := s[int].g1
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is7(f1(x))
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f2 := s[int].g2
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is77(f2(x))
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}
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func methodValues() {
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x := s[int]{a: 7}
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f0 := x.g0
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f0()
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f1 := x.g1
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is7(f1())
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f2 := x.g2
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is77(f2())
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}
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var x interface {
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g0()
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g1() int
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g2() (int, int)
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} = s[int]{a: 7}
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var y interface{} = s[int]{a: 7}
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func interfaceMethods() {
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x.g0()
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is7(x.g1())
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is77(x.g2())
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y.(interface{ g0() }).g0()
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is7(y.(interface{ g1() int }).g1())
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is77(y.(interface{ g2() (int, int) }).g2())
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}
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// Also check for instantiations outside functions.
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var gg0 = g0[int]
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var gg1 = g1[int]
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var gg2 = g2[int]
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var hh0 = s[int].g0
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var hh1 = s[int].g1
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var hh2 = s[int].g2
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var xtop = s[int]{a: 7}
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var ii0 = x.g0
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var ii1 = x.g1
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var ii2 = x.g2
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func globals() {
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gg0(7)
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is7(gg1(7))
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is77(gg2(7))
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x := s[int]{a: 7}
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hh0(x)
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is7(hh1(x))
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is77(hh2(x))
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ii0()
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is7(ii1())
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is77(ii2())
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}
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