mirror of
https://github.com/golang/go
synced 2024-10-01 07:38:32 -06:00
6643abb26c
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
52 lines
950 B
Go
52 lines
950 B
Go
// +build ignore
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package main
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// Test of maps.
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var a, b, c int
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func maps1() {
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m1 := map[*int]*int{&a: &b} // @line m1m1
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m2 := make(map[*int]*int) // @line m1m2
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m2[&b] = &a
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print(m1[nil]) // @pointsto main.b | main.c
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print(m2[nil]) // @pointsto main.a
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print(m1) // @pointsto makemap@m1m1:21
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print(m2) // @pointsto makemap@m1m2:12
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m1[&b] = &c
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for k, v := range m1 {
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print(k) // @pointsto main.a | main.b
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print(v) // @pointsto main.b | main.c
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}
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for k, v := range m2 {
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print(k) // @pointsto main.b
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print(v) // @pointsto main.a
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}
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// Lookup doesn't create any aliases.
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print(m2[&c]) // @pointsto main.a
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if m2v, ok := m2[&a]; ok {
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print(m2[&c]) // @pointsto main.a
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}
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}
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func maps2() {
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m1 := map[*int]*int{&a: &b}
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m2 := map[*int]*int{&b: &c}
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m3 := []map[*int]*int{m1, m2} // (no spurious merging of m1, m2)
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print(m1[nil]) // @pointsto main.b
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print(m2[nil]) // @pointsto main.c
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}
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func main() {
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maps1()
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maps2()
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}
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