51 lines
762 B
Go
51 lines
762 B
Go
package main
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import (
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"unsafe"
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"github.com/goplus/llgo/_demo/cppmintf/foo"
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"github.com/goplus/llgo/c"
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"github.com/goplus/llgo/c/math"
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)
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type Bar struct {
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foo.Callback
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a int
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}
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func NewBar(a int) *Bar {
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return &Bar{
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Callback: foo.Callback{
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ICalc: foo.ICalc{
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Vptr: &foo.ICalcVtbl{
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Calc: c.Func((*Bar).sqrt),
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},
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},
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IVal: foo.IVal{
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Vptr: &foo.IValVtbl{
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Val: c.Func(bar_IVal_getA),
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},
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},
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},
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a: a,
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}
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}
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func (p *Bar) getA() int {
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return p.a
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}
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func bar_IVal_getA(this c.Pointer) int {
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const delta = -int(unsafe.Offsetof(foo.Callback{}.IVal))
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return (*Bar)(c.Advance(this, delta)).getA()
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}
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func (p *Bar) sqrt(v float64) float64 {
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return math.Sqrt(v)
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}
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func main() {
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bar := NewBar(1)
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foo.F(&bar.Callback)
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}
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