Golang types.TypeName类代码示例

func (g *objcGen) genInterfaceM(obj *types.TypeName, t *types.Interface) bool {
	summary := makeIfaceSummary(t)

	// @implementation Interface -- similar to what genStructM does.
	g.Printf("@implementation %s%s {\n", g.namePrefix, obj.Name())
	g.Printf("}\n")
	g.Printf("\n")
	g.Printf("- (id)initWithRef:(id)ref {\n")
	g.Indent()
	g.Printf("self = [super init];\n")
	g.Printf("if (self) { __ref = ref; }\n")
	g.Printf("return self;\n")
	g.Outdent()
	g.Printf("}\n")
	g.Printf("\n")

	for _, m := range summary.callable {
		if !g.isSigSupported(m.Type()) {
			g.Printf("// skipped method %s.%s with unsupported parameter or return types\n\n", obj.Name(), m.Name())
			continue
		}
		s := g.funcSummary(m)
		g.Printf("- %s {\n", s.asMethod(g))
		g.Indent()
		g.genFunc(s, obj.Name())
		g.Outdent()
		g.Printf("}\n\n")
	}
	g.Printf("@end\n")
	g.Printf("\n")

	return summary.implementable
}

func (g *JavaGen) genJNIField(o *types.TypeName, f *types.Var) {
	if t := f.Type(); !g.isSupported(t) {
		g.Printf("// skipped field %s with unsupported type: %T\n\n", o.Name(), t)
		return
	}
	// setter
	g.Printf("JNIEXPORT void JNICALL\n")
	g.Printf("Java_%s_%s_set%s(JNIEnv *env, jobject this, %s v) {\n", g.jniPkgName(), o.Name(), f.Name(), g.jniType(f.Type()))
	g.Indent()
	g.Printf("int32_t o = go_seq_to_refnum_go(env, this);\n")
	g.genJavaToC("v", f.Type(), modeRetained)
	g.Printf("proxy%s_%s_%s_Set(o, _v);\n", g.pkgPrefix, o.Name(), f.Name())
	g.genRelease("v", f.Type(), modeRetained)
	g.Outdent()
	g.Printf("}\n\n")

	// getter
	g.Printf("JNIEXPORT %s JNICALL\n", g.jniType(f.Type()))
	g.Printf("Java_%s_%s_get%s(JNIEnv *env, jobject this) {\n", g.jniPkgName(), o.Name(), f.Name())
	g.Indent()
	g.Printf("int32_t o = go_seq_to_refnum_go(env, this);\n")
	g.Printf("%s r0 = ", g.cgoType(f.Type()))
	g.Printf("proxy%s_%s_%s_Get(o);\n", g.pkgPrefix, o.Name(), f.Name())
	g.genCToJava("_r0", "r0", f.Type(), modeRetained)
	g.Printf("return _r0;\n")
	g.Outdent()
	g.Printf("}\n\n")
}

func (g *objcGen) genInterfaceH(obj *types.TypeName, t *types.Interface) {
	g.Printf("@protocol %s%s\n", g.namePrefix, obj.Name())
	for _, m := range exportedMethodSet(obj.Type()) {
		s := g.funcSummary(m)
		g.Printf("- %s;\n", s.asMethod(g))
	}
	g.Printf("@end\n")
}

func (g *javaGen) genFromRefnum(toName, fromName string, t types.Type, o *types.TypeName) {
	oPkg := o.Pkg()
	if !g.validPkg(oPkg) {
		g.errorf("type %s is defined in package %s, which is not bound", t, oPkg)
		return
	}
	p := pkgPrefix(oPkg)
	g.Printf("jobject %s = go_seq_from_refnum(env, %s, proxy_class_%s_%s, proxy_class_%s_%s_cons);\n", toName, fromName, p, o.Name(), p, o.Name())
}

func (g *ObjcGen) genStructM(obj *types.TypeName, t *types.Struct) {
	fields := exportedFields(t)
	methods := exportedMethodSet(types.NewPointer(obj.Type()))

	g.Printf("\n")
	oinf := g.ostructs[obj]
	g.Printf("@implementation %s%s {\n", g.namePrefix, obj.Name())
	g.Printf("}\n\n")
	g.Printf("- (id)initWithRef:(id)ref {\n")
	g.Indent()
	g.Printf("self = [super init];\n")
	g.Printf("if (self) { __ref = ref; }\n")
	g.Printf("return self;\n")
	g.Outdent()
	g.Printf("}\n\n")
	if oinf != nil {
		g.Printf("- (id)init {\n")
		g.Indent()
		g.Printf("self = [super init];\n")
		g.Printf("if (self) {\n")
		g.Indent()
		g.Printf("__ref = go_seq_from_refnum(new_%s_%s());\n", g.pkgPrefix, obj.Name())
		g.Outdent()
		g.Printf("}\n")
		g.Printf("return self;\n")
		g.Outdent()
		g.Printf("}\n\n")
	}

	for _, f := range fields {
		if !g.isSupported(f.Type()) {
			g.Printf("// skipped unsupported field %s with type %T\n\n", f.Name(), f)
			continue
		}
		g.genGetter(obj.Name(), f)
		g.genSetter(obj.Name(), f)
	}

	for _, m := range methods {
		if !g.isSigSupported(m.Type()) {
			g.Printf("// skipped method %s.%s with unsupported parameter or return types\n\n", obj.Name(), m.Name())
			continue
		}
		s := g.funcSummary(g.ostructs[obj], m)
		g.Printf("- %s {\n", s.asMethod(g))
		g.Indent()
		g.genFunc(s, obj.Name())
		g.Outdent()
		g.Printf("}\n\n")
	}
	g.Printf("@end\n\n")
}

func (g *objcGen) genInterfaceM2(obj *types.TypeName, t *types.Interface) bool {
	summary := makeIfaceSummary(t)

	desc := fmt.Sprintf("_GO_%s_%s", g.pkgName, obj.Name())

	// @implementation Interface -- similar to what genStructM does.
	g.Printf("@implementation %s%s {\n", g.namePrefix, obj.Name())
	g.Printf("}\n")
	g.Printf("\n")
	g.Printf("- (id)initWithRef:(id)ref {\n")
	g.Indent()
	g.Printf("self = [super init];\n")
	g.Printf("if (self) { _ref = ref; }\n")
	g.Printf("return self;\n")
	g.Outdent()
	g.Printf("}\n")
	g.Printf("\n")

	for _, m := range summary.callable {
		s := g.funcSummary(m)
		g.Printf("- %s {\n", s.asMethod(g))
		g.Indent()
		g.genFunc(desc+"_DESCRIPTOR_", desc+"_"+m.Name()+"_", s, true)
		g.Outdent()
		g.Printf("}\n\n")
	}
	g.Printf("@end\n")
	g.Printf("\n")

	// proxy function.
	if summary.implementable {
		g.Printf("static void proxy%s%s(id obj, int code, GoSeq* in, GoSeq* out) {\n", g.namePrefix, obj.Name())
		g.Indent()
		g.Printf("switch (code) {\n")
		for _, m := range summary.callable {
			g.Printf("case %s_%s_: {\n", desc, m.Name())
			g.Indent()
			g.genInterfaceMethodProxy(obj, g.funcSummary(m))
			g.Outdent()
			g.Printf("} break;\n")
		}
		g.Printf("default:\n")
		g.Indent()
		g.Printf("NSLog(@\"unknown code %%x for %s_DESCRIPTOR_\", code);\n", desc)
		g.Outdent()
		g.Printf("}\n")
		g.Outdent()
		g.Printf("}\n")
	}

	return summary.implementable
}

func (g *objcGen) genInterfaceH(obj *types.TypeName, t *types.Interface) {
	summary := makeIfaceSummary(t)
	if !summary.implementable {
		g.genInterfaceInterface(obj, summary, false)
		return
	}
	g.Printf("@protocol %s%s\n", g.namePrefix, obj.Name())
	for _, m := range makeIfaceSummary(t).callable {
		s := g.funcSummary(m)
		g.Printf("- %s;\n", s.asMethod(g))
	}
	g.Printf("@end\n")
}

func newStruct(p *Package, obj *types.TypeName) (Struct, error) {
	sym := p.syms.symtype(obj.Type())
	if sym == nil {
		panic(fmt.Errorf("no such object [%s] in symbols table", obj.Id()))
	}
	sym.doc = p.getDoc("", obj)
	s := Struct{
		pkg: p,
		sym: sym,
		obj: obj,
	}
	return s, nil
}

func (g *objcGen) genInterfaceInterface(obj *types.TypeName, summary ifaceSummary, isProtocol bool) {
	g.Printf("@interface %[1]s%[2]s : NSObject", g.namePrefix, obj.Name())
	if isProtocol {
		g.Printf(" <%[1]s%[2]s>", g.namePrefix, obj.Name())
	}
	g.Printf(" {\n}\n")
	g.Printf("@property(strong, readonly) id _ref;\n")
	g.Printf("\n")
	g.Printf("- (id)initWithRef:(id)ref;\n")
	for _, m := range summary.callable {
		s := g.funcSummary(m)
		g.Printf("- %s;\n", s.asMethod(g))
	}
	g.Printf("@end\n")
}

func (g *JavaGen) genFromRefnum(toName, fromName string, t types.Type, o *types.TypeName) {
	oPkg := o.Pkg()
	isJava := isJavaType(o.Type())
	if !isErrorType(o.Type()) && !g.validPkg(oPkg) && !isJava {
		g.errorf("type %s is defined in package %s, which is not bound", t, oPkg)
		return
	}
	p := pkgPrefix(oPkg)
	g.Printf("jobject %s = go_seq_from_refnum(env, %s, ", toName, fromName)
	if isJava {
		g.Printf("NULL, NULL")
	} else {
		g.Printf("proxy_class_%s_%s, proxy_class_%s_%s_cons", p, o.Name(), p, o.Name())
	}
	g.Printf(");\n")
}

func (g *ObjcGen) genInterfaceH(obj *types.TypeName, t *types.Interface) {
	summary := makeIfaceSummary(t)
	if !summary.implementable {
		g.genInterfaceInterface(obj, summary, false)
		return
	}
	g.Printf("@protocol %s%s <NSObject>\n", g.namePrefix, obj.Name())
	for _, m := range makeIfaceSummary(t).callable {
		if !g.isSigSupported(m.Type()) {
			g.Printf("// skipped method %s.%s with unsupported parameter or return types\n\n", obj.Name(), m.Name())
			continue
		}
		s := g.funcSummary(nil, m)
		g.Printf("- %s;\n", s.asMethod(g))
	}
	g.Printf("@end\n")
}

// methodsFor returns the named type and corresponding methods if the type
// denoted by obj is not an interface and has methods. Otherwise it returns
// the zero value.
func methodsFor(obj *types.TypeName) (*types.Named, []*types.Selection) {
	named, _ := obj.Type().(*types.Named)
	if named == nil {
		// A type name's type can also be the
		// exported basic type unsafe.Pointer.
		return nil, nil
	}
	if _, ok := named.Underlying().(*types.Interface); ok {
		// ignore interfaces
		return nil, nil
	}
	methods := combinedMethodSet(named)
	if len(methods) == 0 {
		return nil, nil
	}
	return named, methods
}

func (g *objcGen) genInterfaceM1(obj *types.TypeName, t *types.Interface) bool {
	summary := makeIfaceSummary(t)

	desc := fmt.Sprintf("_GO_%s_%s", g.pkgName, obj.Name())
	g.Printf("#define %s_DESCRIPTOR_ \"go.%s.%s\"\n", desc, g.pkgName, obj.Name())
	for i, m := range summary.callable {
		g.Printf("#define %s_%s_ (0x%x0a)\n", desc, m.Name(), i+1)
	}
	g.Printf("\n")

	if summary.implementable {
		// @interface Interface -- similar to what genStructH does.
		g.genInterfaceInterface(obj, summary, true)
	}

	return summary.implementable
}

func methodDocComment(prog *loader.Program, tname *types.TypeName, methodName string) (string, error) {
	t := tname.Type()
	if !types.IsInterface(t) {
		// Use the pointer type to get as many methods as possible.
		t = types.NewPointer(t)
	}

	mset := types.NewMethodSet(t)
	sel := mset.Lookup(nil, methodName)
	if sel == nil {
		return "", errgo.Newf("cannot find method %v on %v", methodName, t)
	}
	obj := sel.Obj()
	decl, err := findDecl(prog, obj.Pos())
	if err != nil {
		return "", errgo.Mask(err)
	}
	switch decl := decl.(type) {
	case *ast.GenDecl:
		if decl.Tok != token.TYPE {
			return "", errgo.Newf("found non-type decl %#v", decl)
		}
		for _, spec := range decl.Specs {
			tspec := spec.(*ast.TypeSpec)
			it := tspec.Type.(*ast.InterfaceType)
			for _, m := range it.Methods.List {
				for _, id := range m.Names {
					if id.Pos() == obj.Pos() {
						return m.Doc.Text(), nil
					}
				}
			}
		}
		return "", errgo.Newf("method definition not found in type")
	case *ast.FuncDecl:
		if decl.Name.Pos() != obj.Pos() {
			return "", errgo.Newf("method definition not found (at %#v)", prog.Fset.Position(obj.Pos()))
		}
		return decl.Doc.Text(), nil
	default:
		return "", errgo.Newf("unexpected declaration %T found", decl)
	}
}

func (g *objcGen) genInterfaceInterface(obj *types.TypeName, summary ifaceSummary, isProtocol bool) {
	g.Printf("@interface %[1]s%[2]s : NSObject", g.namePrefix, obj.Name())
	if isProtocol {
		g.Printf(" <%[1]s%[2]s>", g.namePrefix, obj.Name())
	}
	g.Printf(" {\n}\n")
	g.Printf("@property(strong, readonly) id _ref;\n")
	g.Printf("\n")
	g.Printf("- (id)initWithRef:(id)ref;\n")
	for _, m := range summary.callable {
		if !g.isSigSupported(m.Type()) {
			g.Printf("// skipped method %s.%s with unsupported parameter or return types\n\n", obj.Name(), m.Name())
			return
		}
		s := g.funcSummary(m)
		g.Printf("- %s;\n", s.asMethod(g))
	}
	g.Printf("@end\n")
}