| // Tests of call chaining f(g()) when g has multiple return values (MRVs). |
| // See https://code.google.com/p/go/issues/detail?id=4573. |
| |
| package main |
| |
| func assert(actual, expected int) { |
| if actual != expected { |
| panic(actual) |
| } |
| } |
| |
| func g() (int, int) { |
| return 5, 7 |
| } |
| |
| func g2() (float64, float64) { |
| return 5, 7 |
| } |
| |
| func f1v(x int, v ...int) { |
| assert(x, 5) |
| assert(v[0], 7) |
| } |
| |
| func f2(x, y int) { |
| assert(x, 5) |
| assert(y, 7) |
| } |
| |
| func f2v(x, y int, v ...int) { |
| assert(x, 5) |
| assert(y, 7) |
| assert(len(v), 0) |
| } |
| |
| func complexArgs() (float64, float64) { |
| return 5, 7 |
| } |
| |
| func appendArgs() ([]string, string) { |
| return []string{"foo"}, "bar" |
| } |
| |
| func h() (interface{}, bool) { |
| m := map[int]string{1: "hi"} |
| return m[1] // string->interface{} conversion within multi-valued expression |
| } |
| |
| func main() { |
| f1v(g()) |
| f2(g()) |
| f2v(g()) |
| // TODO(gri): the typechecker still doesn't support these cases correctly. |
| // if c := complex(complexArgs()); c != 5+7i { |
| // panic(c) |
| // } |
| // if s := append(appendArgs()); len(s) != 2 || s[0] != "foo" || s[1] != "bar" { |
| // panic(s) |
| // } |
| |
| i, ok := h() |
| if !ok || i.(string) != "hi" { |
| panic(i) |
| } |
| } |