+++ /dev/null
-package main
-
-// Tests of composite literals.
-
-import "fmt"
-
-// Map literals.
-// TODO(adonovan): we can no longer print maps
-// until the interpreter supports (reflect.Value).MapRange.
-func _() {
- type M map[int]int
- m1 := []*M{{1: 1}, &M{2: 2}}
- want := "map[1:1] map[2:2]"
- if got := fmt.Sprint(*m1[0], *m1[1]); got != want {
- panic(got)
- }
- m2 := []M{{1: 1}, M{2: 2}}
- if got := fmt.Sprint(m2[0], m2[1]); got != want {
- panic(got)
- }
-}
-
-// Nonliteral keys in composite literal.
-func init() {
- const zero int = 1
- var v = []int{1 + zero: 42}
- if x := fmt.Sprint(v); x != "[0 0 42]" {
- panic(x)
- }
-}
-
-// Test for in-place initialization.
-func init() {
- // struct
- type S struct {
- a, b int
- }
- s := S{1, 2}
- s = S{b: 3}
- if s.a != 0 {
- panic("s.a != 0")
- }
- if s.b != 3 {
- panic("s.b != 3")
- }
- s = S{}
- if s.a != 0 {
- panic("s.a != 0")
- }
- if s.b != 0 {
- panic("s.b != 0")
- }
-
- // array
- type A [4]int
- a := A{2, 4, 6, 8}
- a = A{1: 6, 2: 4}
- if a[0] != 0 {
- panic("a[0] != 0")
- }
- if a[1] != 6 {
- panic("a[1] != 6")
- }
- if a[2] != 4 {
- panic("a[2] != 4")
- }
- if a[3] != 0 {
- panic("a[3] != 0")
- }
- a = A{}
- if a[0] != 0 {
- panic("a[0] != 0")
- }
- if a[1] != 0 {
- panic("a[1] != 0")
- }
- if a[2] != 0 {
- panic("a[2] != 0")
- }
- if a[3] != 0 {
- panic("a[3] != 0")
- }
-}
-
-// Regression test for https://golang.org/issue/10127:
-// composite literal clobbers destination before reading from it.
-func init() {
- // map
- {
- type M map[string]int
- m := M{"x": 1, "y": 2}
- m = M{"x": m["y"], "y": m["x"]}
- if m["x"] != 2 || m["y"] != 1 {
- panic(fmt.Sprint(m))
- }
-
- n := M{"x": 3}
- m, n = M{"x": n["x"]}, M{"x": m["x"]} // parallel assignment
- if got := fmt.Sprint(m["x"], n["x"]); got != "3 2" {
- panic(got)
- }
- }
-
- // struct
- {
- type T struct{ x, y, z int }
- t := T{x: 1, y: 2, z: 3}
-
- t = T{x: t.y, y: t.z, z: t.x} // all fields
- if got := fmt.Sprint(t); got != "{2 3 1}" {
- panic(got)
- }
-
- t = T{x: t.y, y: t.z + 3} // not all fields
- if got := fmt.Sprint(t); got != "{3 4 0}" {
- panic(got)
- }
-
- u := T{x: 5, y: 6, z: 7}
- t, u = T{x: u.x}, T{x: t.x} // parallel assignment
- if got := fmt.Sprint(t, u); got != "{5 0 0} {3 0 0}" {
- panic(got)
- }
- }
-
- // array
- {
- a := [3]int{0: 1, 1: 2, 2: 3}
-
- a = [3]int{0: a[1], 1: a[2], 2: a[0]} // all elements
- if got := fmt.Sprint(a); got != "[2 3 1]" {
- panic(got)
- }
-
- a = [3]int{0: a[1], 1: a[2] + 3} // not all elements
- if got := fmt.Sprint(a); got != "[3 4 0]" {
- panic(got)
- }
-
- b := [3]int{0: 5, 1: 6, 2: 7}
- a, b = [3]int{0: b[0]}, [3]int{0: a[0]} // parallel assignment
- if got := fmt.Sprint(a, b); got != "[5 0 0] [3 0 0]" {
- panic(got)
- }
- }
-
- // slice
- {
- s := []int{0: 1, 1: 2, 2: 3}
-
- s = []int{0: s[1], 1: s[2], 2: s[0]} // all elements
- if got := fmt.Sprint(s); got != "[2 3 1]" {
- panic(got)
- }
-
- s = []int{0: s[1], 1: s[2] + 3} // not all elements
- if got := fmt.Sprint(s); got != "[3 4]" {
- panic(got)
- }
-
- t := []int{0: 5, 1: 6, 2: 7}
- s, t = []int{0: t[0]}, []int{0: s[0]} // parallel assignment
- if got := fmt.Sprint(s, t); got != "[5] [3]" {
- panic(got)
- }
- }
-}
-
-// Regression test for https://golang.org/issue/13341:
-// within a map literal, if a key expression is a composite literal,
-// Go 1.5 allows its type to be omitted. An & operation may be implied.
-func init() {
- type S struct{ x int }
- // same as map[*S]bool{&S{x: 1}: true}
- m := map[*S]bool{{x: 1}: true}
- for s := range m {
- if s.x != 1 {
- panic(s) // wrong key
- }
- return
- }
- panic("map is empty")
-}
-
-func main() {
-}