72 строки
1,6 КиБ
Go
72 строки
1,6 КиБ
Go
package main
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import (
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"reflect"
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"unsafe"
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)
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type myint int
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func main() {
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println("matching types")
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println(reflect.TypeOf(int(3)) == reflect.TypeOf(int(5)))
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println(reflect.TypeOf(int(3)) == reflect.TypeOf(uint(5)))
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println(reflect.TypeOf(myint(3)) == reflect.TypeOf(int(5)))
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println("\nvalues of interfaces")
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for _, v := range []interface{}{
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true,
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false,
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int(2000),
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int(-2000),
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uint(2000),
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int8(-3),
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int8(3),
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uint8(200),
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int16(-300),
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int16(300),
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uint16(50000),
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int32(7 << 20),
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int32(-7 << 20),
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uint32(7 << 20),
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int64(9 << 40),
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int64(-9 << 40),
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uint64(9 << 40),
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uintptr(12345),
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float32(3.14),
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float64(3.14),
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complex64(1.2 + 0.3i),
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complex128(1.3 + 0.4i),
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"foo",
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unsafe.Pointer(new(int)),
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} {
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showValue(v)
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}
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}
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func showValue(v interface{}) {
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rv := reflect.ValueOf(v)
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rt := rv.Type()
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if reflect.TypeOf(v) != rt {
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panic("direct TypeOf() is different from ValueOf().Type()")
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}
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println("reflect type:", rt.Kind().String())
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switch rt.Kind() {
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case reflect.Bool:
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println(" bool:", rv.Bool())
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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println(" int:", rv.Int())
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case reflect.Uint, reflect.Uintptr, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
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println(" uint:", rv.Uint())
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case reflect.Float32, reflect.Float64:
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println(" float:", rv.Float())
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case reflect.Complex64, reflect.Complex128:
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println(" complex:", rv.Complex())
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case reflect.String:
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println(" string:", rv.String())
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case reflect.UnsafePointer:
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println(" pointer:", rv.Pointer() != 0)
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default:
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println(" unknown type kind!")
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}
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}
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