modernc.org/gc@v1.0.1-0.20240304020402-f0dba7c97c2b/testdata/errchk/test/bigalg.go (about) 1 // run 2 3 // Copyright 2009 The Go Authors. All rights reserved. 4 // Use of this source code is governed by a BSD-style 5 // license that can be found in the LICENSE file. 6 7 // Test the internal "algorithms" for objects larger than a word: hashing, equality etc. 8 9 package main 10 11 type T struct { 12 a float64 13 b int64 14 c string 15 d byte 16 } 17 18 var a = []int{1, 2, 3} 19 var NIL []int 20 21 func arraycmptest() { 22 if NIL != nil { 23 println("fail1:", NIL, "!= nil") 24 panic("bigalg") 25 } 26 if nil != NIL { 27 println("fail2: nil !=", NIL) 28 panic("bigalg") 29 } 30 if a == nil || nil == a { 31 println("fail3:", a, "== nil") 32 panic("bigalg") 33 } 34 } 35 36 func SameArray(a, b []int) bool { 37 if len(a) != len(b) || cap(a) != cap(b) { 38 return false 39 } 40 if len(a) > 0 && &a[0] != &b[0] { 41 return false 42 } 43 return true 44 } 45 46 var t = T{1.5, 123, "hello", 255} 47 var mt = make(map[int]T) 48 var ma = make(map[int][]int) 49 50 func maptest() { 51 mt[0] = t 52 t1 := mt[0] 53 if t1.a != t.a || t1.b != t.b || t1.c != t.c || t1.d != t.d { 54 println("fail: map val struct", t1.a, t1.b, t1.c, t1.d) 55 panic("bigalg") 56 } 57 58 ma[1] = a 59 a1 := ma[1] 60 if !SameArray(a, a1) { 61 println("fail: map val array", a, a1) 62 panic("bigalg") 63 } 64 } 65 66 var ct = make(chan T) 67 var ca = make(chan []int) 68 69 func send() { 70 ct <- t 71 ca <- a 72 } 73 74 func chantest() { 75 go send() 76 77 t1 := <-ct 78 if t1.a != t.a || t1.b != t.b || t1.c != t.c || t1.d != t.d { 79 println("fail: map val struct", t1.a, t1.b, t1.c, t1.d) 80 panic("bigalg") 81 } 82 83 a1 := <-ca 84 if !SameArray(a, a1) { 85 println("fail: map val array", a, a1) 86 panic("bigalg") 87 } 88 } 89 90 type E struct{} 91 92 var e E 93 94 func interfacetest() { 95 var i interface{} 96 97 i = a 98 a1 := i.([]int) 99 if !SameArray(a, a1) { 100 println("interface <-> []int", a, a1) 101 panic("bigalg") 102 } 103 pa := new([]int) 104 *pa = a 105 i = pa 106 a1 = *i.(*[]int) 107 if !SameArray(a, a1) { 108 println("interface <-> *[]int", a, a1) 109 panic("bigalg") 110 } 111 112 i = t 113 t1 := i.(T) 114 if t1.a != t.a || t1.b != t.b || t1.c != t.c || t1.d != t.d { 115 println("interface <-> struct", t1.a, t1.b, t1.c, t1.d) 116 panic("bigalg") 117 } 118 119 i = e 120 e1 := i.(E) 121 // nothing to check; just verify it doesn't crash 122 _ = e1 123 } 124 125 func main() { 126 arraycmptest() 127 maptest() 128 chantest() 129 interfacetest() 130 }