Method genInterfaceMethodProxy

bind/genobjc.go:947–1022

(obj *types.TypeName, m *types.Func)

}

func (g *ObjcGen) genInterfaceMethodProxy(obj *types.TypeName, m *types.Func) {
	oName := obj.Name()
	s := g.funcSummary(nil, m)
	g.genInterfaceMethodSignature(m, oName, false, g.paramName)
	g.Indent()
	g.Printf("@autoreleasepool {\n")
	g.Indent()
	g.Printf("%s* o = go_seq_objc_from_refnum(refnum);\n", g.refTypeBase(obj.Type()))
	for _, p := range s.params {
		g.genRead("_"+p.name, p.name, p.typ, modeTransient)
	}

	// call method
	for _, p := range s.retParams {
		if isErrorType(p.typ) {
			g.Printf("NSError* %s = nil;\n", p.name)
		} else {
			g.Printf("%s %s;\n", g.objcType(p.typ), p.name)
		}
	}

	if isErrorType(obj.Type()) && m.Name() == "Error" {
		// As a special case, ObjC NSErrors are passed to Go pretending to implement the Go error interface.
		// They don't actually have an Error method, so calls to it needs to be rerouted.
		g.Printf("%s = [o localizedDescription];\n", s.retParams[0].name)
	} else {
		if s.ret == "void" {
			g.Printf("[o %s];\n", s.callMethod(g))
		} else if !s.returnsVal() {
			g.Printf("%s returnVal = [o %s];\n", s.ret, s.callMethod(g))
		} else {
			g.Printf("%s = [o %s];\n", s.retParams[0].name, s.callMethod(g))
		}
	}

	if len(s.retParams) > 0 {
		if len(s.retParams) == 1 && !isErrorType(s.retParams[0].typ) {
			p := s.retParams[0]
			g.genWrite(p.name, p.typ, modeRetained)
			g.Printf("return _%s;\n", p.name)
		} else {
			var rets []string
			for _, p := range s.retParams {
				if isErrorType(p.typ) {
					g.Printf("NSError *_%s = nil;\n", p.name)
					if !s.returnsVal() {
						g.Printf("if (!returnVal) {\n")
					} else {
						g.Printf("if (%s != nil) {\n", p.name)
					}
					g.Indent()
					g.Printf("_%[1]s = %[1]s;\n", p.name)
					g.Outdent()
					g.Printf("}\n")
					g.genWrite("_"+p.name, p.typ, modeRetained)
					rets = append(rets, "__"+p.name)
				} else {
					g.genWrite(p.name, p.typ, modeRetained)