reflect: add support for non-named basic types

testdata/reflect.go

@@ -1,6 +1,9 @@
 package main
 
-import "reflect"
+import (
+	"reflect"
+	"unsafe"
+)
 
 type myint int
 
@@ -9,4 +12,61 @@ func main() {
 	println(reflect.TypeOf(int(3)) == reflect.TypeOf(int(5)))
 	println(reflect.TypeOf(int(3)) == reflect.TypeOf(uint(5)))
 	println(reflect.TypeOf(myint(3)) == reflect.TypeOf(int(5)))
+
+	println("\nvalues of interfaces")
+	for _, v := range []interface{}{
+		true,
+		false,
+		int(2000),
+		int(-2000),
+		uint(2000),
+		int8(-3),
+		int8(3),
+		uint8(200),
+		int16(-300),
+		int16(300),
+		uint16(50000),
+		int32(7 << 20),
+		int32(-7 << 20),
+		uint32(7 << 20),
+		int64(9 << 40),
+		int64(-9 << 40),
+		uint64(9 << 40),
+		uintptr(12345),
+		float32(3.14),
+		float64(3.14),
+		complex64(1.2 + 0.3i),
+		complex128(1.3 + 0.4i),
+		"foo",
+		unsafe.Pointer(new(int)),
+	} {
+		showValue(v)
+	}
+}
+
+func showValue(v interface{}) {
+	rv := reflect.ValueOf(v)
+	rt := rv.Type()
+	if reflect.TypeOf(v) != rt {
+		panic("direct TypeOf() is different from ValueOf().Type()")
+	}
+	println("reflect type:", rt.Kind().String())
+	switch rt.Kind() {
+	case reflect.Bool:
+		println("  bool:", rv.Bool())
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		println("  int:", rv.Int())
+	case reflect.Uint, reflect.Uintptr, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		println("  uint:", rv.Uint())
+	case reflect.Float32, reflect.Float64:
+		println("  float:", rv.Float())
+	case reflect.Complex64, reflect.Complex128:
+		println("  complex:", rv.Complex())
+	case reflect.String:
+		println("  string:", rv.String())
+	case reflect.UnsafePointer:
+		println("  pointer:", rv.Pointer() != 0)
+	default:
+		println("  unknown type kind!")
+	}
 }