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go/pointer/testdata/maps.go
Alan Donovan 6643abb26c go.tools/pointer: inclusion-based pointer analysis for Go.
Suggested reading order:
- doc.go
- api.go, analysis.go, callgraph.go, labels.go
- print.go, util.go
- gen.go
- solve.go
- pointer_test.go, testdata/*
- intrinsics.go (none are implemented yet)

R=dannyb, gri, crawshaw, 0xjnml
CC=golang-dev
https://golang.org/cl/10618043
2013-08-22 12:27:55 -04:00

52 lines
950 B
Go

// +build ignore
package main
// Test of maps.
var a, b, c int
func maps1() {
m1 := map[*int]*int{&a: &b} // @line m1m1
m2 := make(map[*int]*int) // @line m1m2
m2[&b] = &a
print(m1[nil]) // @pointsto main.b | main.c
print(m2[nil]) // @pointsto main.a
print(m1) // @pointsto makemap@m1m1:21
print(m2) // @pointsto makemap@m1m2:12
m1[&b] = &c
for k, v := range m1 {
print(k) // @pointsto main.a | main.b
print(v) // @pointsto main.b | main.c
}
for k, v := range m2 {
print(k) // @pointsto main.b
print(v) // @pointsto main.a
}
// Lookup doesn't create any aliases.
print(m2[&c]) // @pointsto main.a
if m2v, ok := m2[&a]; ok {
print(m2[&c]) // @pointsto main.a
}
}
func maps2() {
m1 := map[*int]*int{&a: &b}
m2 := map[*int]*int{&b: &c}
m3 := []map[*int]*int{m1, m2} // (no spurious merging of m1, m2)
print(m1[nil]) // @pointsto main.b
print(m2[nil]) // @pointsto main.c
}
func main() {
maps1()
maps2()
}