mirror of
https://github.com/golang/go
synced 2024-11-19 04:44:41 -07:00
a24d794bb1
R=adonovan CC=golang-dev https://golang.org/cl/13246052
167 lines
2.7 KiB
Go
167 lines
2.7 KiB
Go
// +build ignore
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package main
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var a, b, c int
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var unknown bool // defeat dead-code elimination
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func func1() {
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var h int // @line f1h
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f := func(x *int) *int {
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if unknown {
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return &b
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}
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return x
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}
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// FV(g) = {f, h}
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g := func(x *int) *int {
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if unknown {
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return &h
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}
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return f(x)
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}
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print(g(&a)) // @pointsto main.a | main.b | h@f1h:6
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print(f(&a)) // @pointsto main.a | main.b
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print(&a) // @pointsto main.a
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}
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// @calls main.func1 -> func@19.7
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// @calls main.func1 -> func@11.7
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// @calls func@19.7 -> func@11.7
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func func2() {
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var x, y *int
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defer func() {
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x = &a
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}()
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go func() {
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y = &b
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}()
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print(x) // @pointsto main.a
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print(y) // @pointsto main.b
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}
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func func3() {
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x, y := func() (x, y *int) {
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x = &a
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y = &b
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if unknown {
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return nil, &c
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}
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return
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}()
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print(x) // @pointsto main.a
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print(y) // @pointsto main.b | main.c
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}
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func swap(x, y *int) (*int, *int) { // @line swap
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print(&x) // @pointsto x@swap:11
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print(x) // @pointsto makeslice[*]@func4make:11
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print(&y) // @pointsto y@swap:14
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print(y) // @pointsto j@f4j:5
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return y, x
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}
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func func4() {
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a := make([]int, 10) // @line func4make
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i, j := 123, 456 // @line f4j
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_ = i
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p, q := swap(&a[3], &j)
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print(p) // @pointsto j@f4j:5
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print(q) // @pointsto makeslice[*]@func4make:11
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f := &b
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print(f) // @pointsto main.b
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}
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type T int
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func (t *T) f(x *int) *int {
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print(t) // @pointsto main.a
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print(x) // @pointsto main.c
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return &b
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}
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func (t *T) g(x *int) *int {
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print(t) // @pointsto main.a
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print(x) // @pointsto main.b
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return &c
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}
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func (t *T) h(x *int) *int {
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print(t) // @pointsto main.a
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print(x) // @pointsto main.b
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return &c
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}
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var h func(*T, *int) *int
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func func5() {
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// Static call of method.
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t := (*T)(&a)
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print(t.f(&c)) // @pointsto main.b
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// Static call of method as function
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print((*T).g(t, &b)) // @pointsto main.c
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// Dynamic call (not invoke) of method.
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h = (*T).h
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print(h(t, &b)) // @pointsto main.c
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}
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// @calls main.func5 -> (*main.T).f
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// @calls main.func5 -> (*main.T).g
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// @calls main.func5 -> (*main.T).h
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func func6() {
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A := &a
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f := func() *int {
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return A // (free variable)
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}
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print(f()) // @pointsto main.a
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}
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// @calls main.func6 -> func@121.7
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type I interface {
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f()
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}
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type D struct{}
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func (D) f() {}
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func func7() {
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var i I = D{}
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imethodClosure := i.f
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imethodClosure()
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// @calls main.func7 -> bound$(main.I).f
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// @calls bound$(main.I).f -> (main.D).f
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var d D
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cmethodClosure := d.f
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cmethodClosure()
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// @calls main.func7 -> bound$(main.D).f
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// @calls bound$(main.D).f ->(main.D).f
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methodExpr := D.f
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methodExpr(d)
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// @calls main.func7 -> (main.D).f
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}
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func main() {
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func1()
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func2()
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func3()
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func4()
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func5()
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func6()
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func7()
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}
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// @calls <root> -> main.main
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// @calls <root> -> main.init
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