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reflection for methods

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R=r
DELTA=156  (135 added, 8 deleted, 13 changed)
OCL=31407
CL=31428
This commit is contained in:
Russ Cox 2009-07-09 17:27:49 -07:00
parent 76fef1deec
commit 12ebbe7463
4 changed files with 149 additions and 22 deletions
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34
src/pkg/reflect/all_test.go
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@ -744,3 +744,37 @@ func TestFunc(t *testing.T) {
t.Errorf("Call returned %d, %d, %d; want 10, 20, 30", i, j, k);
}
}
type Point struct {
x, y int;
}
func (p Point) Dist(scale int) int {
return p.x*p.x*scale + p.y*p.y*scale;
}
func TestMethod(t *testing.T) {
// Non-curried method of type.
p := Point{3, 4};
i := reflect.Typeof(p).Method(0).Func.Call([]Value{NewValue(p), NewValue(10)})[0].(*IntValue).Get();
if i != 250 {
t.Errorf("Type Method returned %d; want 250", i);
}
// Curried method of value.
i = NewValue(p).Method(0).Call([]Value{NewValue(10)})[0].(*IntValue).Get();
if i != 250 {
t.Errorf("Value Method returned %d; want 250", i);
}
// Curried method of interface value.
// Have to wrap interface value in a struct to get at it.
// Passing it to NewValue directly would
// access the underlying Point, not the interface.
var s = struct{x interface{Dist(int) int}}{p};
pv := NewValue(s).(*StructValue).Field(0);
i = pv.Method(0).Call([]Value{NewValue(10)})[0].(*IntValue).Get();
if i != 250 {
t.Errorf("Interface Method returned %d; want 250", i);
}
}