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[dev.typeparams] cmd/compile: enable parsing of generic code with new…
… -G flag Providing the -G flag instructs the compiler to accept type parameters. For now, the compiler only parses such files and then exits. Added a new test directory (test/typeparam) and initial test case. Port from dev.go2go branch. Change-Id: Ic11e33a9d5f012f8def0bdae205043659562ac73 Reviewed-on: https://go-review.googlesource.com/c/go/+/261660 Trust: Robert Griesemer <gri@golang.org> Run-TryBot: Robert Griesemer <gri@golang.org> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
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// compile -G | ||
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// Copyright 2020 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. | ||
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// This file checks simple code using type parameters. | ||
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package smoketest | ||
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// type parameters for functions | ||
func f1[P any]() | ||
func f2[P1, P2 any, P3 any]() | ||
func f3[P interface{}](x P, y T1[int]) | ||
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// function instantiations | ||
var _ = f1[int] | ||
var _ = f2[int, string, struct{}] | ||
var _ = f3[bool] | ||
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// type parameters for types | ||
type T1[P any] struct{} | ||
type T2[P1, P2 any, P3 any] struct{} | ||
type T3[P interface{}] interface{} | ||
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// type instantiations | ||
type _ T1[int] | ||
type _ T2[int, string, struct{}] | ||
type _ T3[bool] | ||
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// methods | ||
func (T1[P]) m1() {} | ||
func (x T2[P1, P2, P3]) m1() {} | ||
func (_ T3[_]) m1() {} | ||
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// type lists | ||
type _ interface { | ||
m1() | ||
m2() | ||
type int, float32, string | ||
m3() | ||
type bool | ||
} | ||
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// embedded instantiated types | ||
type _ struct { | ||
f1, f2 int | ||
T1[int] | ||
T2[int, string, struct{}] | ||
T3[bool] | ||
} | ||
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type _ interface { | ||
m1() | ||
m2() | ||
T3[bool] | ||
} |