diff options
| -rw-r--r-- | test/typeswitch.go | 89 |
1 files changed, 13 insertions, 76 deletions
diff --git a/test/typeswitch.go b/test/typeswitch.go index ed899e098..5ad694d86 100644 --- a/test/typeswitch.go +++ b/test/typeswitch.go @@ -35,7 +35,6 @@ func assert(b bool, s string) { } } - func f(i int) interface{} { switch i { case Bool: @@ -61,64 +60,37 @@ func f(i int) interface{} { } func main() { - // type guard style -// for i := Bool; i < Last; i++ { -// switch v := f(i); true { -// case x := v.(bool): -// assert(x == true && i == Bool, "switch 1 bool"); -// case x := v.(int): -// assert(x == 7 && i == Int, "switch 1 int"); -// case x := v.(float): -// assert(x == 7.4 && i == Float, "switch 1 float"); -// case x := v.(string): -// assert(x == "hello" && i == String, "switch 1 string"); -// case x := v.(S): -// assert(x.a == 1234 && i == Struct, "switch 1 struct"); -// case x := v.(chan int): -// assert(x == c && i == Chan, "switch 1 chan"); -// case x := v.([]int): -// assert(x[3] == 3 && i == Array, "switch 1 array"); -// case x := v.(map[string]int): -// assert(x == m && i == Map, "switch 1 map"); -// case x := v.(func(i int) interface{}): -// assert(x == f && i == Func, "switch 1 fun"); -// default: -// assert(false, "switch 1 unknown"); -// } -// } - - // type switch style for i := Bool; i < Last; i++ { switch x := f(i).(type) { case bool: - assert(x == true && i == Bool, "switch 2 bool"); + assert(x == true && i == Bool, "bool"); case int: - assert(x == 7 && i == Int, "switch 2 int"); + assert(x == 7 && i == Int, "int"); case float: - assert(x == 7.4 && i == Float, "switch 2 float"); + assert(x == 7.4 && i == Float, "float"); case string: - assert(x == "hello" && i == String, "switch 2 string"); + assert(x == "hello"&& i == String, "string"); case S: - assert(x.a == 1234 && i == Struct, "switch 2 struct"); + assert(x.a == 1234 && i == Struct, "struct"); case chan int: - assert(x == c && i == Chan, "switch 2 chan"); + assert(x == c && i == Chan, "chan"); case []int: - assert(x[3] == 3 && i == Array, "switch 2 array"); + assert(x[3] == 3 && i == Array, "array"); case map[string]int: - assert(x == m && i == Map, "switch 2 map"); + assert(x == m && i == Map, "map"); case func(i int) interface{}: - assert(x == f && i == Func, "switch 2 fun"); + assert(x == f && i == Func, "fun"); default: - assert(false, "switch 2 unknown"); + assert(false, "unknown"); } } - // catch-all style in various forms + // boolean switch (has had bugs in past; worth writing down) switch { case true: - assert(true, "switch 3 bool"); + assert(true, "switch 2 bool"); default: - assert(false, "switch 3 unknown"); + assert(false, "switch 2 unknown"); } switch true { @@ -135,39 +107,4 @@ func main() { assert(false, "switch 4 unknown"); } -// switch true { -// case x := f(Int).(float): -// assert(false, "switch 5 type guard wrong type"); -// case x := f(Int).(int): -// assert(x == 7, "switch 5 type guard"); -// default: -// assert(false, "switch 5 unknown"); -// } - - m["7"] = 7; -// switch true { -// case x := m["6"]: -// assert(false, "switch 6 map reference wrong"); -// case x := m["7"]: -// assert(x == 7, "switch 6 map reference"); -// default: -// assert(false, "switch 6 unknown"); -// } - - go func() { <-c; c <- 77; } (); - // guarantee the channel is ready - c <- 77; - for i := 0; i < 5; i++ { - sys.Gosched(); - } - dummyc := make(chan int); -// switch true { -// case x := <-dummyc: -// assert(false, "switch 7 chan wrong"); -// case x := <-c: -// assert(x == 77, "switch 7 chan"); -// default: -// assert(false, "switch 7 unknown"); -// } - } |