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go/pointer/testdata/context.go

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// +build ignore
package main
// Test of context-sensitive treatment of certain function calls,
// e.g. static calls to simple accessor methods.
var a, b int
type T struct{ x *int }
func (t *T) SetX(x *int) { t.x = x }
func (t *T) GetX() *int { return t.x }
func context1() {
var t1, t2 T
t1.SetX(&a)
t2.SetX(&b)
print(t1.GetX()) // @pointsto main.a
print(t2.GetX()) // @pointsto main.b
}
func context2() {
id := func(x *int) *int {
print(x) // @pointsto main.a | main.b
return x
}
print(id(&a)) // @pointsto main.a
print(id(&b)) // @pointsto main.b
// Same again, but anon func has free vars.
var c int // @line context2c
id2 := func(x *int) (*int, *int) {
print(x) // @pointsto main.a | main.b
return x, &c
}
p, q := id2(&a)
print(p) // @pointsto main.a
print(q) // @pointsto c@context2c:6
r, s := id2(&b)
print(r) // @pointsto main.b
print(s) // @pointsto c@context2c:6
}
func main() {
context1()
context2()
}