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// run
// Copyright 2023 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.
// Test the 'for range' construct ranging over integers.
package main
func testint1() {
bad := false
j := 0
for i := range int(4) {
if i != j {
println("range var", i, "want", j)
bad = true
}
j++
}
if j != 4 {
println("wrong count ranging over 4:", j)
bad = true
}
if bad {
panic("testint1")
}
}
func testint2() {
bad := false
j := 0
for i := range 4 {
if i != j {
println("range var", i, "want", j)
bad = true
}
j++
}
if j != 4 {
println("wrong count ranging over 4:", j)
bad = true
}
if bad {
panic("testint2")
}
}
func testint3() {
bad := false
type MyInt int
j := MyInt(0)
for i := range MyInt(4) {
if i != j {
println("range var", i, "want", j)
bad = true
}
j++
}
if j != 4 {
println("wrong count ranging over 4:", j)
bad = true
}
if bad {
panic("testint3")
}
}
// Issue #63378.
func testint4() {
for i := range -1 {
_ = i
panic("must not be executed")
}
}
// Issue #64471.
func testint5() {
for i := range 'a' {
var _ *rune = &i // ensure i has type rune
}
}
func main() {
testint1()
testint2()
testint3()
testint4()
testint5()
}
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