mirror of
https://github.com/golang/go
synced 2024-11-19 10:14:44 -07:00
115 lines
1.4 KiB
Go
115 lines
1.4 KiB
Go
package main
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// Tests of field promotion logic.
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type A struct {
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x int
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y *int
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}
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type B struct {
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p int
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q *int
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}
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type C struct {
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A
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*B
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}
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type D struct {
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a int
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C
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}
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func assert(cond bool) {
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if !cond {
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panic("failed")
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}
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}
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func f1(c C) {
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assert(c.x == c.A.x)
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assert(c.y == c.A.y)
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assert(&c.x == &c.A.x)
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assert(&c.y == &c.A.y)
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assert(c.p == c.B.p)
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assert(c.q == c.B.q)
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assert(&c.p == &c.B.p)
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assert(&c.q == &c.B.q)
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c.x = 1
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*c.y = 1
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c.p = 1
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*c.q = 1
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}
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func f2(c *C) {
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assert(c.x == c.A.x)
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assert(c.y == c.A.y)
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assert(&c.x == &c.A.x)
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assert(&c.y == &c.A.y)
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assert(c.p == c.B.p)
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assert(c.q == c.B.q)
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assert(&c.p == &c.B.p)
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assert(&c.q == &c.B.q)
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c.x = 1
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*c.y = 1
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c.p = 1
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*c.q = 1
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}
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func f3(d D) {
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assert(d.x == d.C.A.x)
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assert(d.y == d.C.A.y)
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assert(&d.x == &d.C.A.x)
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assert(&d.y == &d.C.A.y)
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assert(d.p == d.C.B.p)
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assert(d.q == d.C.B.q)
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assert(&d.p == &d.C.B.p)
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assert(&d.q == &d.C.B.q)
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d.x = 1
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*d.y = 1
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d.p = 1
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*d.q = 1
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}
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func f4(d *D) {
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assert(d.x == d.C.A.x)
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assert(d.y == d.C.A.y)
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assert(&d.x == &d.C.A.x)
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assert(&d.y == &d.C.A.y)
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assert(d.p == d.C.B.p)
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assert(d.q == d.C.B.q)
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assert(&d.p == &d.C.B.p)
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assert(&d.q == &d.C.B.q)
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d.x = 1
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*d.y = 1
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d.p = 1
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*d.q = 1
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}
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func main() {
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y := 123
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c := C{
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A{x: 42, y: &y},
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&B{p: 42, q: &y},
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}
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assert(&c.x == &c.A.x)
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f1(c)
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f2(&c)
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d := D{C: c}
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f3(d)
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f4(&d)
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}
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