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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.
package generics
func _[A, B any](a A, b B) int {}
func _[T any](x, y T) T
type T[P any] struct{}
type T[P1, P2, P3 any] struct{}
type T[P C] struct{}
type T[P1, P2, P3 C] struct{}
type T[P C[P]] struct{}
type T[P1, P2, P3 C[P1, P2, P3]] struct{}
func f[P any](x P)
func f[P1, P2, P3 any](x1 P1, x2 P2, x3 P3) struct{}
func f[P interface{}](x P)
func f[P1, P2, P3 interface {
m1(P1)
~P2 | ~P3
}](x1 P1, x2 P2, x3 P3) struct{}
func f[P any](T1[P], T2[P]) T3[P]
func (x T[P]) m()
func (T[P]) m(x T[P]) P
func _() {
type _ []T[P]
var _ []T[P]
_ = []T[P]{}
}
// type constraint literals with elided interfaces
func _[P ~int, Q int | string]() {}
func _[P struct{ f int }, Q *P]() {}
// various potentially ambiguous type parameter lists (issue #49482)
type _[P *T,] struct{}
type _[P T | T] struct{}
type _[P T | T | T | T] struct{}
type _[P *T, _ any] struct{}
type _[P *T,] struct{}
type _[P *T, _ any] struct{}
type _[P T] struct{}
type _[P T, _ any] struct{}
type _[P *struct{}] struct{}
type _ [P(*struct{})]struct{}
type _[P []int] struct{}
// a type literal in an |-expression indicates a type parameter list (blank after type parameter list and type)
type _[P *[]int] struct{}
type _[P *T | T, Q T] struct{}
type _[P *[]T | T] struct{}
type _[P *T | T | T | T | ~T] struct{}
type _[P *T | T | T | ~T | T] struct{}
type _[P *T | T | struct{} | T] struct{}
type _[P <-chan int] struct{}
type _[P *T | struct{} | T] struct{}
// a trailing comma always indicates a (possibly invalid) type parameter list (blank after type parameter list and type)
type _[P *T,] struct{}
type _[P *T | T,] struct{}
type _[P *T | <-T | T,] struct{}
// slice/array type declarations (no blank between array length and element type)
type _ []byte
type _ [n]byte
type _ [P(T)]byte
type _ [P((T))]byte
type _ [P * *T]byte
type _ [P * T]byte
type _ [P(*T)]byte
type _ [P(**T)]byte
type _ [P*T - T]byte
type _ [P*T - T]byte
type _ [P*T | T]byte
type _ [P*T | <-T | T]byte
// equivalent test cases for potentially ambiguous type parameter lists, except
// for function declarations there is no ambiguity (issue #51548)
func _[P *T]() {}
func _[P *T, _ any]() {}
func _[P *T]() {}
func _[P *T, _ any]() {}
func _[P T]() {}
func _[P T, _ any]() {}
func _[P *struct{}]() {}
func _[P *struct{}]() {}
func _[P []int]() {}
func _[P T]() {}
func _[P T]() {}
func _[P **T]() {}
func _[P *T]() {}
func _[P *T]() {}
func _[P **T]() {}
func _[P *T]() {}
func _[
P *T,
]() {
}