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84 lines
2.4 KiB
Go
84 lines
2.4 KiB
Go
// +build ignore
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package main
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import "reflect"
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var zero, a, b int
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// func f(p *int) *int {
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// print(p) // #@pointsto
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// return &b
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// }
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// func g(p *bool) {
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// }
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// func reflectValueCall() {
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// rvf := reflect.ValueOf(f)
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// res := rvf.Call([]reflect.Value{reflect.ValueOf(&a)})
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// print(res[0].Interface()) // #@types
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// print(res[0].Interface().(*int)) // #@pointsto
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// }
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// #@calls main.reflectValueCall -> main.f
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func reflectTypeInOut() {
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var f func(float64, bool) (string, int)
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// TODO(adonovan): when the In/Out argument is a valid index constant,
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// only include a single type in the result. Needs some work.
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print(reflect.Zero(reflect.TypeOf(f).In(0)).Interface()) // @types float64 | bool
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print(reflect.Zero(reflect.TypeOf(f).In(1)).Interface()) // @types float64 | bool
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print(reflect.Zero(reflect.TypeOf(f).In(-1)).Interface()) // @types float64 | bool
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print(reflect.Zero(reflect.TypeOf(f).In(zero)).Interface()) // @types float64 | bool
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print(reflect.Zero(reflect.TypeOf(f).Out(0)).Interface()) // @types string | int
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print(reflect.Zero(reflect.TypeOf(f).Out(1)).Interface()) // @types string | int
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print(reflect.Zero(reflect.TypeOf(f).Out(2)).Interface()) // @types string | int
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print(reflect.Zero(reflect.TypeOf(3).Out(0)).Interface()) // @types
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}
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type T struct{}
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func (T) F() {}
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func (T) g(int) {}
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type U struct{}
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func (U) F(int) {}
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func (U) g(string) {}
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var nonconst string
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func reflectTypeMethodByName() {
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TU := reflect.TypeOf([]interface{}{T{}, U{}}[0])
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print(reflect.Zero(TU)) // @types T | U
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F, _ := TU.MethodByName("F")
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print(reflect.Zero(F.Type)) // @types func(T) | func(U, int)
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print(F.Func) // @pointsto (main.T).F | (main.U).F
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g, _ := TU.MethodByName("g")
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print(reflect.Zero(g.Type)) // @types func(T, int) | func(U, string)
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print(g.Func) // @pointsto (main.T).g | (main.U).g
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// Non-literal method names are treated less precisely.
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U := reflect.TypeOf(U{})
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X, _ := U.MethodByName(nonconst)
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print(reflect.Zero(X.Type)) // @types func(U, int) | func(U, string)
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print(X.Func) // @pointsto (main.U).F | (main.U).g
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}
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func reflectTypeMethod() {
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m := reflect.TypeOf(T{}).Method(0)
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print(reflect.Zero(m.Type)) // @types func(T) | func(T, int)
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print(m.Func) // @pointsto (main.T).F | (main.T).g
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}
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func main() {
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//reflectValueCall()
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reflectTypeInOut()
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reflectTypeMethodByName()
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reflectTypeMethod()
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}
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