github.com/AndrienkoAleksandr/go@v0.0.19/src/go/printer/testdata/generics.input (about)

     1  // Copyright 2020 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package generics
     6  
     7  func _[A, B any](a A, b B) int {}
     8  func _[T any](x, y T) T
     9  
    10  type T[P any] struct{}
    11  type T[P1, P2, P3 any] struct{}
    12  
    13  type T[P C] struct{}
    14  type T[P1, P2, P3 C] struct{}
    15  
    16  type T[P C[P]] struct{}
    17  type T[P1, P2, P3 C[P1, P2, P3]] struct{}
    18  
    19  func f[P any](x P)
    20  func f[P1, P2, P3 any](x1 P1, x2 P2, x3 P3) struct{}
    21  
    22  func f[P interface{}](x P)
    23  func f[P1, P2, P3 interface{ m1(P1); ~P2|~P3 }](x1 P1, x2 P2, x3 P3) struct{}
    24  func f[P any](T1[P], T2[P]) T3[P]
    25  
    26  func (x T[P]) m()
    27  func ((T[P])) m(x T[P]) P
    28  
    29  func _() {
    30  	type _ []T[P]
    31  	var _ []T[P]
    32  	_ = []T[P]{}
    33  }
    34  
    35  // type constraint literals with elided interfaces
    36  func _[P ~int, Q int | string]() {}
    37  func _[P struct{f int}, Q *P]() {}
    38  
    39  // various potentially ambiguous type parameter lists (issue #49482)
    40  type _[P *T,] struct{}
    41  type _[P T | T] struct{}
    42  type _[P T | T | T | T] struct{}
    43  type _[P *T, _ any] struct{}
    44  type _[P (*T),] struct{}
    45  type _[P (*T), _ any] struct{}
    46  type _[P (T),] struct{}
    47  type _[P (T), _ any] struct{}
    48  
    49  type _[P *struct{}] struct{}
    50  type _[P (*struct{})] struct{}
    51  type _[P ([]int)] struct{}
    52  
    53  // a type literal in an |-expression indicates a type parameter list (blank after type parameter list and type)
    54  type _[P *[]int] struct{}
    55  type _[P *T | T, Q T] struct{}
    56  type _[P *[]T | T] struct{}
    57  type _[P *T | T | T | T | ~T] struct{}
    58  type _[P *T | T | T | ~T | T] struct{}
    59  type _[P *T | T | struct{} | T] struct{}
    60  type _[P <-chan int] struct{}
    61  type _[P *T | struct{} | T] struct{}
    62  
    63  // a trailing comma always indicates a (possibly invalid) type parameter list (blank after type parameter list and type)
    64  type _[P *T,] struct{}
    65  type _[P *T | T,] struct{}
    66  type _[P *T | <-T | T,] struct{}
    67  
    68  // slice/array type declarations (no blank between array length and element type)
    69  type _ []byte
    70  type _ [n]byte
    71  type _ [P(T)]byte
    72  type _ [P((T))]byte
    73  type _ [P * *T]byte
    74  type _ [P * T]byte
    75  type _ [P(*T)]byte
    76  type _ [P(**T)]byte
    77  type _ [P * T - T]byte
    78  type _ [P * T - T]byte
    79  type _ [P * T | T]byte
    80  type _ [P * T | <-T | T]byte
    81  
    82  // equivalent test cases for potentially ambiguous type parameter lists, except
    83  // for function declarations there is no ambiguity (issue #51548)
    84  func _[P *T,]() {}
    85  func _[P *T, _ any]() {}
    86  func _[P (*T),]() {}
    87  func _[P (*T), _ any]() {}
    88  func _[P (T),]() {}
    89  func _[P (T), _ any]() {}
    90  
    91  func _[P *struct{}] () {}
    92  func _[P (*struct{})] () {}
    93  func _[P ([]int)] () {}
    94  
    95  func _ [P(T)]() {}
    96  func _ [P((T))]() {}
    97  func _ [P * *T]() {}
    98  func _ [P * T]() {}
    99  func _ [P(*T)]() {}
   100  func _ [P(**T)]() {}
   101  func _ [P * T]() {}
   102  
   103  func _[
   104  	P *T,
   105  ]() {}