func (g *ObjcGen) genWrite(varName string, t types.Type, mode varMode) {
switch t := t.(type) {
case *types.Basic:
switch t.Kind() {
case types.String:
g.Printf("nstring _%s = go_seq_from_objc_string(%s);\n", varName, varName)
default:
g.Printf("%s _%s = (%s)%s;\n", g.cgoType(t), varName, g.cgoType(t), varName)
}
case *types.Slice:
switch e := t.Elem().(type) {
case *types.Basic:
switch e.Kind() {
case types.Uint8: // Byte.
g.Printf("nbyteslice _%s = go_seq_from_objc_bytearray(%s, %d);\n", varName, varName, toCFlag(mode == modeRetained))
default:
g.errorf("unsupported type: %s", t)
}
default:
g.errorf("unsupported type: %s", t)
}
case *types.Named:
switch u := t.Underlying().(type) {
case *types.Interface:
g.genRefWrite(varName)
default:
g.errorf("unsupported named type: %s / %T", u, u)
}
case *types.Pointer:
g.genRefWrite(varName)
default:
g.Printf("%s _%s = (%s)%s;\n", g.cgoType(t), varName, g.cgoType(t), varName)
}
}
// zeroConst returns a new "zero" constant of the specified type,
// which must not be an array or struct type: the zero values of
// aggregates are well-defined but cannot be represented by Const.
//
func zeroConst(t types.Type) *Const {
switch t := t.(type) {
case *types.Basic:
switch {
case t.Info()&types.IsBoolean != 0:
return NewConst(exact.MakeBool(false), t)
case t.Info()&types.IsNumeric != 0:
return NewConst(exact.MakeInt64(0), t)
case t.Info()&types.IsString != 0:
return NewConst(exact.MakeString(""), t)
case t.Kind() == types.UnsafePointer:
fallthrough
case t.Kind() == types.UntypedNil:
return nilConst(t)
default:
panic(fmt.Sprint("zeroConst for unexpected type:", t))
}
case *types.Pointer, *types.Slice, *types.Interface, *types.Chan, *types.Map, *types.Signature:
return nilConst(t)
case *types.Named:
return NewConst(zeroConst(t.Underlying()).Value, t)
case *types.Array, *types.Struct, *types.Tuple:
panic(fmt.Sprint("zeroConst applied to aggregate:", t))
}
panic(fmt.Sprint("zeroConst: unexpected ", t))
}
func asmKindForType(t types.Type, size int) asmKind {
switch t := t.Underlying().(type) {
case *types.Basic:
switch t.Kind() {
case types.String:
return asmString
case types.Complex64, types.Complex128:
return asmComplex
}
return asmKind(size)
case *types.Pointer, *types.Chan, *types.Map, *types.Signature:
return asmKind(size)
case *types.Struct:
return asmStruct
case *types.Interface:
if t.Empty() {
return asmEmptyInterface
}
return asmInterface
case *types.Array:
return asmArray
case *types.Slice:
return asmSlice
}
panic("unreachable")
}
// javaTypeDefault returns a string that represents the default value of the mapped java type.
// TODO(hyangah): Combine javaType and javaTypeDefault?
func (g *javaGen) javaTypeDefault(T types.Type) string {
switch T := T.(type) {
case *types.Basic:
switch T.Kind() {
case types.Bool:
return "false"
case types.Int, types.Int8, types.Int16, types.Int32,
types.Int64, types.Uint8:
return "0"
case types.Float32, types.Float64:
return "0.0"
case types.String:
return "null"
default:
g.errorf("unsupported return type: %s", T)
return "TODO"
}
case *types.Slice, *types.Pointer, *types.Named:
return "null"
default:
g.errorf("unsupported javaType: %#+v, %s\n", T, T)
return "TODO"
}
}
// cgoType returns the name of a Cgo type suitable for converting a value of
// the given type.
func (g *generator) cgoType(t types.Type) string {
if isErrorType(t) {
return g.cgoType(types.Typ[types.String])
}
switch t := t.(type) {
case *types.Basic:
switch t.Kind() {
case types.Bool, types.UntypedBool:
return "char"
case types.Int:
return "nint"
case types.Int8:
return "int8_t"
case types.Int16:
return "int16_t"
case types.Int32, types.UntypedRune: // types.Rune
return "int32_t"
case types.Int64, types.UntypedInt:
return "int64_t"
case types.Uint8: // types.Byte
return "uint8_t"
// TODO(crawshaw): case types.Uint, types.Uint16, types.Uint32, types.Uint64:
case types.Float32:
return "float"
case types.Float64, types.UntypedFloat:
return "double"
case types.String:
return "nstring"
default:
g.errorf("unsupported basic type: %s", t)
}
case *types.Slice:
switch e := t.Elem().(type) {
case *types.Basic:
switch e.Kind() {
case types.Uint8: // Byte.
return "nbyteslice"
default:
g.errorf("unsupported slice type: %s", t)
}
default:
g.errorf("unsupported slice type: %s", t)
}
case *types.Pointer:
if _, ok := t.Elem().(*types.Named); ok {
return g.cgoType(t.Elem())
}
g.errorf("unsupported pointer to type: %s", t)
case *types.Named:
return "int32_t"
default:
g.errorf("unsupported type: %s", t)
}
return "TODO"
}
func (g *goGen) genWrite(toVar, fromVar string, t types.Type, mode varMode) {
if isErrorType(t) {
g.Printf("var %s_str string\n", toVar)
g.Printf("if %s == nil {\n", fromVar)
g.Printf(" %s_str = \"\"\n", toVar)
g.Printf("} else {\n")
g.Printf(" %s_str = %s.Error()\n", toVar, fromVar)
g.Printf("}\n")
g.genWrite(toVar, toVar+"_str", types.Typ[types.String], mode)
return
}
switch t := t.(type) {
case *types.Basic:
switch t.Kind() {
case types.String:
g.Printf("%s := encodeString(%s)\n", toVar, fromVar)
case types.Bool:
g.Printf("var %s C.%s = 0\n", toVar, g.cgoType(t))
g.Printf("if %s { %s = 1 }\n", fromVar, toVar)
default:
g.Printf("%s := C.%s(%s)\n", toVar, g.cgoType(t), fromVar)
}
case *types.Slice:
switch e := t.Elem().(type) {
case *types.Basic:
switch e.Kind() {
case types.Uint8: // Byte.
g.Printf("%s := fromSlice(%s, %v)\n", toVar, fromVar, mode == modeRetained)
default:
g.errorf("unsupported type: %s", t)
}
default:
g.errorf("unsupported type: %s", t)
}
case *types.Pointer:
// TODO(crawshaw): test *int
// TODO(crawshaw): test **Generator
switch t := t.Elem().(type) {
case *types.Named:
g.genToRefNum(toVar, fromVar)
default:
g.errorf("unsupported type %s", t)
}
case *types.Named:
switch u := t.Underlying().(type) {
case *types.Interface, *types.Pointer:
g.genToRefNum(toVar, fromVar)
default:
g.errorf("unsupported, direct named type %s: %s", t, u)
}
default:
g.errorf("unsupported type %s", t)
}
}
// javaType returns a string that can be used as a Java type.
func (g *javaGen) javaType(T types.Type) string {
switch T := T.(type) {
case *types.Basic:
switch T.Kind() {
case types.Bool:
return "boolean"
case types.Int:
return "long"
case types.Int8:
return "byte"
case types.Int16:
return "short"
case types.Int32:
return "int"
case types.Int64:
return "long"
case types.Uint8:
// TODO(crawshaw): Java bytes are signed, so this is
// questionable, but vital.
return "byte"
// TODO(crawshaw): case types.Uint, types.Uint16, types.Uint32, types.Uint64:
case types.Float32:
return "float"
case types.Float64:
return "double"
case types.String:
return "String"
default:
g.errorf("unsupported return type: %s", T)
return "TODO"
}
case *types.Slice:
elem := g.javaType(T.Elem())
return elem + "[]"
case *types.Pointer:
if _, ok := T.Elem().(*types.Named); ok {
return g.javaType(T.Elem())
}
panic(fmt.Sprintf("unsupporter pointer to type: %s", T))
case *types.Named:
n := T.Obj()
if n.Pkg() != g.pkg {
panic(fmt.Sprintf("type %s is in package %s, must be defined in package %s", n.Name(), n.Pkg().Name(), g.pkg.Name()))
}
// TODO(crawshaw): more checking here
return n.Name()
default:
g.errorf("unsupported javaType: %#+v, %s\n", T, T)
return "TODO"
}
}
// jniType returns a string that can be used as a JNI type.
func (g *javaGen) jniType(T types.Type) string {
if isErrorType(T) {
// The error type is usually translated into an exception in
// Java, however the type can be exposed in other ways, such
// as an exported field.
return g.jniType(types.Typ[types.String])
}
switch T := T.(type) {
case *types.Basic:
switch T.Kind() {
case types.Bool, types.UntypedBool:
return "jboolean"
case types.Int:
return "jlong"
case types.Int8:
return "jbyte"
case types.Int16:
return "jshort"
case types.Int32, types.UntypedRune: // types.Rune
return "jint"
case types.Int64, types.UntypedInt:
return "jlong"
case types.Uint8: // types.Byte
// TODO(crawshaw): Java bytes are signed, so this is
// questionable, but vital.
return "jbyte"
// TODO(crawshaw): case types.Uint, types.Uint16, types.Uint32, types.Uint64:
case types.Float32:
return "jfloat"
case types.Float64, types.UntypedFloat:
return "jdouble"
case types.String, types.UntypedString:
return "jstring"
default:
g.errorf("unsupported basic type: %s", T)
return "TODO"
}
case *types.Slice:
return "jbyteArray"
case *types.Pointer:
if _, ok := T.Elem().(*types.Named); ok {
return g.jniType(T.Elem())
}
g.errorf("unsupported pointer to type: %s", T)
case *types.Named:
return "jobject"
default:
g.errorf("unsupported jniType: %#+v, %s\n", T, T)
}
return "TODO"
}
func (g *javaGen) genCToJava(toName, fromName string, t types.Type, mode varMode) {
if isErrorType(t) {
g.genCToJava(toName, fromName, types.Typ[types.String], mode)
return
}
switch t := t.(type) {
case *types.Basic:
switch t.Kind() {
case types.String:
g.Printf("jstring %s = go_seq_to_java_string(env, %s);\n", toName, fromName)
case types.Bool:
g.Printf("jboolean %s = %s ? JNI_TRUE : JNI_FALSE;\n", toName, fromName)
default:
g.Printf("%s %s = (%s)%s;\n", g.jniType(t), toName, g.jniType(t), fromName)
}
case *types.Slice:
switch e := t.Elem().(type) {
case *types.Basic:
switch e.Kind() {
case types.Uint8: // Byte.
g.Printf("jbyteArray %s = go_seq_to_java_bytearray(env, %s, %d);\n", toName, fromName, g.toCFlag(mode == modeRetained))
default:
g.errorf("unsupported type: %s", t)
}
default:
g.errorf("unsupported type: %s", t)
}
case *types.Pointer:
// TODO(crawshaw): test *int
// TODO(crawshaw): test **Generator
switch t := t.Elem().(type) {
case *types.Named:
g.genFromRefnum(toName, fromName, t, t.Obj())
default:
g.errorf("unsupported type %s", t)
}
case *types.Named:
switch t.Underlying().(type) {
case *types.Interface, *types.Pointer:
g.genFromRefnum(toName, fromName, t, t.Obj())
default:
g.errorf("unsupported, direct named type %s", t)
}
default:
g.Printf("%s %s = (%s)%s;\n", g.jniType(t), toName, g.jniType(t), fromName)
}
}
// jniType returns a string that can be used as a JNI type.
func (g *JavaGen) jniType(T types.Type) string {
switch T := T.(type) {
case *types.Basic:
switch T.Kind() {
case types.Bool, types.UntypedBool:
return "jboolean"
case types.Int:
return "jlong"
case types.Int8:
return "jbyte"
case types.Int16:
return "jshort"
case types.Int32, types.UntypedRune: // types.Rune
return "jint"
case types.Int64, types.UntypedInt:
return "jlong"
case types.Uint8: // types.Byte
// TODO(crawshaw): Java bytes are signed, so this is
// questionable, but vital.
return "jbyte"
// TODO(crawshaw): case types.Uint, types.Uint16, types.Uint32, types.Uint64:
case types.Float32:
return "jfloat"
case types.Float64, types.UntypedFloat:
return "jdouble"
case types.String, types.UntypedString:
return "jstring"
default:
g.errorf("unsupported basic type: %s", T)
return "TODO"
}
case *types.Slice:
return "jbyteArray"
case *types.Pointer:
if _, ok := T.Elem().(*types.Named); ok {
return g.jniType(T.Elem())
}
g.errorf("unsupported pointer to type: %s", T)
case *types.Named:
return "jobject"
default:
g.errorf("unsupported jniType: %#+v, %s\n", T, T)
}
return "TODO"
}
func (g *objcGen) genRead(toName, fromName string, t types.Type, mode varMode) {
if isErrorType(t) {
g.genRead(toName, fromName, types.Typ[types.String], mode)
return
}
switch t := t.(type) {
case *types.Basic:
switch t.Kind() {
case types.String:
g.Printf("NSString *%s = go_seq_to_objc_string(%s);\n", toName, fromName)
case types.Bool:
g.Printf("BOOL %s = %s ? YES : NO;\n", toName, fromName)
default:
g.Printf("%s %s = (%s)%s;\n", g.objcType(t), toName, g.objcType(t), fromName)
}
case *types.Slice:
switch e := t.Elem().(type) {
case *types.Basic:
switch e.Kind() {
case types.Uint8: // Byte.
g.Printf("NSData *%s = go_seq_to_objc_bytearray(%s, %d);\n", toName, fromName, g.toCFlag(mode == modeRetained))
default:
g.errorf("unsupported type: %s", t)
}
default:
g.errorf("unsupported type: %s", t)
}
case *types.Pointer:
switch t := t.Elem().(type) {
case *types.Named:
g.genRefRead(toName, fromName, types.NewPointer(t))
default:
g.errorf("unsupported type %s", t)
}
case *types.Named:
switch t.Underlying().(type) {
case *types.Interface, *types.Pointer:
g.genRefRead(toName, fromName, t)
default:
g.errorf("unsupported, direct named type %s", t)
}
default:
g.Printf("%s %s = (%s)%s;\n", g.objcType(t), toName, g.objcType(t), fromName)
}
}
func (g *javaGen) jniSigType(T types.Type) string {
if isErrorType(T) {
return g.jniSigType(types.Typ[types.String])
}
switch T := T.(type) {
case *types.Basic:
switch T.Kind() {
case types.Bool, types.UntypedBool:
return "Z"
case types.Int:
return "J"
case types.Int8:
return "B"
case types.Int16:
return "S"
case types.Int32, types.UntypedRune: // types.Rune
return "I"
case types.Int64, types.UntypedInt:
return "J"
case types.Uint8: // types.Byte
return "B"
case types.Float32:
return "F"
case types.Float64, types.UntypedFloat:
return "D"
case types.String, types.UntypedString:
return "Ljava/lang/String;"
default:
g.errorf("unsupported basic type: %s", T)
return "TODO"
}
case *types.Slice:
return "[" + g.jniSigType(T.Elem())
case *types.Pointer:
if _, ok := T.Elem().(*types.Named); ok {
return g.jniSigType(T.Elem())
}
g.errorf("unsupported pointer to type: %s", T)
case *types.Named:
return "L" + g.jniClassSigPrefix(T.Obj().Pkg()) + T.Obj().Name() + ";"
default:
g.errorf("unsupported jniType: %#+v, %s\n", T, T)
}
return "TODO"
}
func (f *File) validResultType(typ types.Type) *Error {
switch typ.(type) {
default:
name := typ.String()
if named, ok := typ.(*types.Named); ok {
name = named.Obj().Name()
}
return &Error{errors.New(fmt.Sprint("Invalid result type:", name)), 0}
case *types.Basic:
typ := typ.(*types.Basic)
switch typ.Kind() {
default:
return &Error{errors.New(fmt.Sprint("Invalid basic type for result type :", typ.Info())), 0}
case types.Bool:
return nil
case types.Int:
return nil
case types.Int8:
return nil
case types.Int16:
return nil
case types.Int32:
return nil
case types.Int64:
return nil
case types.Uint:
return nil
case types.Uint8:
return nil
case types.Uint16:
return nil
case types.Uint32:
return nil
case types.Uint64:
return nil
case types.Float32:
return nil
case types.Float64:
return nil
}
}
}
func (g *javaGen) jniCallType(t types.Type) string {
if isErrorType(t) {
return g.jniCallType(types.Typ[types.String])
}
switch t := t.(type) {
case *types.Basic:
switch t.Kind() {
case types.Bool, types.UntypedBool:
return "Boolean"
case types.Int:
return "Long"
case types.Int8, types.Uint8: // types.Byte
return "Byte"
case types.Int16:
return "Short"
case types.Int32, types.UntypedRune: // types.Rune
return "Int"
case types.Int64, types.UntypedInt:
return "Long"
case types.Float32:
return "Float"
case types.Float64, types.UntypedFloat:
return "Double"
case types.String, types.UntypedString:
return "Object"
default:
g.errorf("unsupported basic type: %s", t)
}
case *types.Slice:
return "Object"
case *types.Pointer:
if _, ok := t.Elem().(*types.Named); ok {
return g.jniCallType(t.Elem())
}
g.errorf("unsupported pointer to type: %s", t)
case *types.Named:
return "Object"
default:
return "Object"
}
return "TODO"
}
func (g *javaGen) genJavaToC(varName string, t types.Type, mode varMode) {
if isErrorType(t) {
g.genJavaToC(varName, types.Typ[types.String], mode)
return
}
switch t := t.(type) {
case *types.Basic:
switch t.Kind() {
case types.String:
g.Printf("nstring _%s = go_seq_from_java_string(env, %s);\n", varName, varName)
default:
g.Printf("%s _%s = (%s)%s;\n", g.cgoType(t), varName, g.cgoType(t), varName)
}
case *types.Slice:
switch e := t.Elem().(type) {
case *types.Basic:
switch e.Kind() {
case types.Uint8: // Byte.
g.Printf("nbyteslice _%s = go_seq_from_java_bytearray(env, %s, %d);\n", varName, varName, g.toCFlag(mode == modeRetained))
default:
g.errorf("unsupported type: %s", t)
}
default:
g.errorf("unsupported type: %s", t)
}
case *types.Named:
switch u := t.Underlying().(type) {
case *types.Interface:
g.Printf("int32_t _%s = go_seq_to_refnum(env, %s);\n", varName, varName)
default:
g.errorf("unsupported named type: %s / %T", u, u)
}
case *types.Pointer:
g.Printf("int32_t _%s = go_seq_to_refnum(env, %s);\n", varName, varName)
default:
g.Printf("%s _%s = (%s)%s;\n", g.cgoType(t), varName, g.cgoType(t), varName)
}
}
// matchArgTypeInternal is the internal version of matchArgType. It carries a map
// remembering what types are in progress so we don't recur when faced with recursive
// types or mutually recursive types.
func (f *File) matchArgTypeInternal(t printfArgType, typ types.Type, arg ast.Expr, inProgress map[types.Type]bool) bool {
// %v, %T accept any argument type.
if t == anyType {
return true
}
if typ == nil {
// external call
typ = f.pkg.types[arg].Type
if typ == nil {
return true // probably a type check problem
}
}
// If the type implements fmt.Formatter, we have nothing to check.
if f.isFormatter(typ) {
return true
}
// If we can use a string, might arg (dynamically) implement the Stringer or Error interface?
if t&argString != 0 {
if types.AssertableTo(errorType, typ) || stringerType != nil && types.AssertableTo(stringerType, typ) {
return true
}
}
typ = typ.Underlying()
if inProgress[typ] {
// We're already looking at this type. The call that started it will take care of it.
return true
}
inProgress[typ] = true
switch typ := typ.(type) {
case *types.Signature:
return t&argPointer != 0
case *types.Map:
// Recur: map[int]int matches %d.
return t&argPointer != 0 ||
(f.matchArgTypeInternal(t, typ.Key(), arg, inProgress) && f.matchArgTypeInternal(t, typ.Elem(), arg, inProgress))
case *types.Chan:
return t&argPointer != 0
case *types.Array:
// Same as slice.
if types.Identical(typ.Elem().Underlying(), types.Typ[types.Byte]) && t&argString != 0 {
return true // %s matches []byte
}
// Recur: []int matches %d.
return t&argPointer != 0 || f.matchArgTypeInternal(t, typ.Elem().Underlying(), arg, inProgress)
case *types.Slice:
// Same as array.
if types.Identical(typ.Elem().Underlying(), types.Typ[types.Byte]) && t&argString != 0 {
return true // %s matches []byte
}
// Recur: []int matches %d. But watch out for
// type T []T
// If the element is a pointer type (type T[]*T), it's handled fine by the Pointer case below.
return t&argPointer != 0 || f.matchArgTypeInternal(t, typ.Elem(), arg, inProgress)
case *types.Pointer:
// Ugly, but dealing with an edge case: a known pointer to an invalid type,
// probably something from a failed import.
if typ.Elem().String() == "invalid type" {
if *verbose {
f.Warnf(arg.Pos(), "printf argument %v is pointer to invalid or unknown type", f.gofmt(arg))
}
return true // special case
}
// If it's actually a pointer with %p, it prints as one.
if t == argPointer {
return true
}
// If it's pointer to struct, that's equivalent in our analysis to whether we can print the struct.
if str, ok := typ.Elem().Underlying().(*types.Struct); ok {
return f.matchStructArgType(t, str, arg, inProgress)
}
// The rest can print with %p as pointers, or as integers with %x etc.
return t&(argInt|argPointer) != 0
case *types.Struct:
return f.matchStructArgType(t, typ, arg, inProgress)
case *types.Interface:
// There's little we can do.
// Whether any particular verb is valid depends on the argument.
// The user may have reasonable prior knowledge of the contents of the interface.
return true
case *types.Basic:
switch typ.Kind() {
case types.UntypedBool,
types.Bool:
return t&argBool != 0
case types.UntypedInt,
types.Int,
types.Int8,
types.Int16,
types.Int32,
types.Int64,
types.Uint,
types.Uint8,
types.Uint16,
types.Uint32,
types.Uint64,
types.Uintptr:
return t&argInt != 0
case types.UntypedFloat,
types.Float32,
types.Float64:
return t&argFloat != 0
case types.UntypedComplex,
types.Complex64,
types.Complex128:
return t&argComplex != 0
case types.UntypedString,
types.String:
return t&argString != 0
case types.UnsafePointer:
return t&(argPointer|argInt) != 0
case types.UntypedRune:
return t&(argInt|argRune) != 0
case types.UntypedNil:
return t&argPointer != 0 // TODO?
case types.Invalid:
if *verbose {
f.Warnf(arg.Pos(), "printf argument %v has invalid or unknown type", f.gofmt(arg))
}
return true // Probably a type check problem.
}
panic("unreachable")
}
return false
}
func (g *ObjcGen) objcType(typ types.Type) string {
if isErrorType(typ) {
return "NSError*"
}
switch typ := typ.(type) {
case *types.Basic:
switch typ.Kind() {
case types.Bool, types.UntypedBool:
return "BOOL"
case types.Int:
return "long"
case types.Int8:
return "int8_t"
case types.Int16:
return "int16_t"
case types.Int32, types.UntypedRune: // types.Rune
return "int32_t"
case types.Int64, types.UntypedInt:
return "int64_t"
case types.Uint8:
// byte is an alias of uint8, and the alias is lost.
return "byte"
case types.Uint16:
return "uint16_t"
case types.Uint32:
return "uint32_t"
case types.Uint64:
return "uint64_t"
case types.Float32:
return "float"
case types.Float64, types.UntypedFloat:
return "double"
case types.String, types.UntypedString:
return "NSString*"
default:
g.errorf("unsupported type: %s", typ)
return "TODO"
}
case *types.Slice:
elem := g.objcType(typ.Elem())
// Special case: NSData seems to be a better option for byte slice.
if elem == "byte" {
return "NSData*"
}
// TODO(hyangah): support other slice types: NSArray or CFArrayRef.
// Investigate the performance implication.
g.errorf("unsupported type: %s", typ)
return "TODO"
case *types.Pointer:
if _, ok := typ.Elem().(*types.Named); ok {
return g.objcType(typ.Elem()) + "*"
}
g.errorf("unsupported pointer to type: %s", typ)
return "TODO"
case *types.Named:
n := typ.Obj()
if isObjcType(typ) {
w := g.wrapMap[n.Name()]
return w.ObjcType()
}
if !isErrorType(typ) && !g.validPkg(n.Pkg()) {
g.errorf("type %s is in package %s, which is not bound", n.Name(), n.Pkg().Name())
return "TODO"
}
switch t := typ.Underlying().(type) {
case *types.Interface:
if makeIfaceSummary(t).implementable {
return "id<" + g.namePrefixOf(n.Pkg()) + n.Name() + ">"
} else {
return g.namePrefixOf(n.Pkg()) + n.Name() + "*"
}
case *types.Struct:
return g.namePrefixOf(n.Pkg()) + n.Name()
}
g.errorf("unsupported, named type %s", typ)
return "TODO"
default:
g.errorf("unsupported type: %#+v, %s", typ, typ)
return "TODO"
}
}
// javaType returns a string that can be used as a Java type.
func (g *javaGen) javaType(T types.Type) string {
if isErrorType(T) {
// The error type is usually translated into an exception in
// Java, however the type can be exposed in other ways, such
// as an exported field.
return "String"
}
switch T := T.(type) {
case *types.Basic:
switch T.Kind() {
case types.Bool, types.UntypedBool:
return "boolean"
case types.Int:
return "long"
case types.Int8:
return "byte"
case types.Int16:
return "short"
case types.Int32, types.UntypedRune: // types.Rune
return "int"
case types.Int64, types.UntypedInt:
return "long"
case types.Uint8: // types.Byte
// TODO(crawshaw): Java bytes are signed, so this is
// questionable, but vital.
return "byte"
// TODO(crawshaw): case types.Uint, types.Uint16, types.Uint32, types.Uint64:
case types.Float32:
return "float"
case types.Float64, types.UntypedFloat:
return "double"
case types.String, types.UntypedString:
return "String"
default:
g.errorf("unsupported basic type: %s", T)
return "TODO"
}
case *types.Slice:
elem := g.javaType(T.Elem())
return elem + "[]"
case *types.Pointer:
if _, ok := T.Elem().(*types.Named); ok {
return g.javaType(T.Elem())
}
panic(fmt.Sprintf("unsupported pointer to type: %s", T))
case *types.Named:
n := T.Obj()
if n.Pkg() != g.pkg {
nPkgName := "<nilpkg>"
if nPkg := n.Pkg(); nPkg != nil {
nPkgName = nPkg.Name()
}
panic(fmt.Sprintf("type %s is in package %s, must be defined in package %s", n.Name(), nPkgName, g.pkg.Name()))
}
// TODO(crawshaw): more checking here
return n.Name()
default:
g.errorf("unsupported javaType: %#+v, %s\n", T, T)
return "TODO"
}
}
func (w *Walker) writeType(buf *bytes.Buffer, typ types.Type) {
switch typ := typ.(type) {
case *types.Basic:
s := typ.Name()
switch typ.Kind() {
case types.UnsafePointer:
s = "unsafe.Pointer"
case types.UntypedBool:
s = "ideal-bool"
case types.UntypedInt:
s = "ideal-int"
case types.UntypedRune:
// "ideal-char" for compatibility with old tool
// TODO(gri) change to "ideal-rune"
s = "ideal-char"
case types.UntypedFloat:
s = "ideal-float"
case types.UntypedComplex:
s = "ideal-complex"
case types.UntypedString:
s = "ideal-string"
case types.UntypedNil:
panic("should never see untyped nil type")
default:
switch s {
case "byte":
s = "uint8"
case "rune":
s = "int32"
}
}
buf.WriteString(s)
case *types.Array:
fmt.Fprintf(buf, "[%d]", typ.Len())
w.writeType(buf, typ.Elem())
case *types.Slice:
buf.WriteString("[]")
w.writeType(buf, typ.Elem())
case *types.Struct:
buf.WriteString("struct")
case *types.Pointer:
buf.WriteByte('*')
w.writeType(buf, typ.Elem())
case *types.Tuple:
panic("should never see a tuple type")
case *types.Signature:
buf.WriteString("func")
w.writeSignature(buf, typ)
case *types.Interface:
buf.WriteString("interface{")
if typ.NumMethods() > 0 {
buf.WriteByte(' ')
buf.WriteString(strings.Join(sortedMethodNames(typ), ", "))
buf.WriteByte(' ')
}
buf.WriteString("}")
case *types.Map:
buf.WriteString("map[")
w.writeType(buf, typ.Key())
buf.WriteByte(']')
w.writeType(buf, typ.Elem())
case *types.Chan:
var s string
switch typ.Dir() {
case types.SendOnly:
s = "chan<- "
case types.RecvOnly:
s = "<-chan "
case types.SendRecv:
s = "chan "
default:
panic("unreachable")
}
buf.WriteString(s)
w.writeType(buf, typ.Elem())
case *types.Named:
obj := typ.Obj()
pkg := obj.Pkg()
if pkg != nil && pkg != w.current {
buf.WriteString(pkg.Name())
buf.WriteByte('.')
}
buf.WriteString(typ.Obj().Name())
default:
panic(fmt.Sprintf("unknown type %T", typ))
}
}
func (g *objcGen) objcType(typ types.Type) string {
if isErrorType(typ) {
return "NSError*"
}
switch typ := typ.(type) {
case *types.Basic:
switch typ.Kind() {
case types.Bool:
return "BOOL"
case types.Int:
return "int"
case types.Int8:
return "int8_t"
case types.Int16:
return "int16_t"
case types.Int32:
return "int32_t"
case types.Int64:
return "int64_t"
case types.Uint8:
// byte is an alias of uint8, and the alias is lost.
return "byte"
case types.Uint16:
return "uint16_t"
case types.Uint32:
return "uint32_t"
case types.Uint64:
return "uint64_t"
case types.Float32:
return "float"
case types.Float64:
return "double"
case types.String:
return "NSString*"
default:
g.errorf("unsupported type: %s", typ)
return "TODO"
}
case *types.Slice:
elem := g.objcType(typ.Elem())
// Special case: NSData seems to be a better option for byte slice.
if elem == "byte" {
return "NSData*"
}
// TODO(hyangah): support other slice types: NSArray or CFArrayRef.
// Investigate the performance implication.
g.errorf("unsupported type: %s", typ)
return "TODO"
case *types.Pointer:
if _, ok := typ.Elem().(*types.Named); ok {
return g.objcType(typ.Elem()) + "*"
}
g.errorf("unsupported pointer to type: %s", typ)
return "TODO"
case *types.Named:
n := typ.Obj()
if n.Pkg() != g.pkg {
g.errorf("type %s is in package %s; only types defined in package %s is supported", n.Name(), n.Pkg().Name(), g.pkg.Name())
return "TODO"
}
switch typ.Underlying().(type) {
case *types.Interface:
return "id<" + g.namePrefix + n.Name() + ">"
case *types.Struct:
return g.namePrefix + n.Name()
}
g.errorf("unsupported, named type %s", typ)
return "TODO"
default:
g.errorf("unsupported type: %#+v, %s", typ, typ)
return "TODO"
}
}
// seqType returns a string that can be used for reading and writing a
// type using the seq library.
// TODO(hyangah): avoid panic; gobind needs to output the problematic code location.
func seqType(t types.Type) string {
if isErrorType(t) {
return "String"
}
switch t := t.(type) {
case *types.Basic:
switch t.Kind() {
case types.Bool:
return "Bool"
case types.Int:
return "Int"
case types.Int8:
return "Int8"
case types.Int16:
return "Int16"
case types.Int32:
return "Int32"
case types.Int64:
return "Int64"
case types.Uint8: // Byte.
// TODO(crawshaw): questionable, but vital?
return "Byte"
// TODO(crawshaw): case types.Uint, types.Uint16, types.Uint32, types.Uint64:
case types.Float32:
return "Float32"
case types.Float64:
return "Float64"
case types.String:
return "String"
default:
// Should be caught earlier in processing.
panic(fmt.Sprintf("unsupported basic seqType: %s", t))
}
case *types.Named:
switch u := t.Underlying().(type) {
case *types.Interface:
return "Ref"
default:
panic(fmt.Sprintf("unsupported named seqType: %s / %T", u, u))
}
case *types.Slice:
switch e := t.Elem().(type) {
case *types.Basic:
switch e.Kind() {
case types.Uint8: // Byte.
return "ByteArray"
default:
panic(fmt.Sprintf("unsupported seqType: %s(%s) / %T(%T)", t, e, t, e))
}
default:
panic(fmt.Sprintf("unsupported seqType: %s(%s) / %T(%T)", t, e, t, e))
}
// TODO: let the types.Array case handled like types.Slice?
case *types.Pointer:
if _, ok := t.Elem().(*types.Named); ok {
return "Ref"
}
panic(fmt.Sprintf("not supported yet, pointer type: %s / %T", t, t))
default:
panic(fmt.Sprintf("unsupported seqType: %s / %T", t, t))
}
}
// zero returns a new "zero" value of the specified type.
func zero(t types.Type) value {
switch t := t.(type) {
case *types.Basic:
if t.Kind() == types.UntypedNil {
panic("untyped nil has no zero value")
}
if t.Info()&types.IsUntyped != 0 {
// TODO(adonovan): make it an invariant that
// this is unreachable. Currently some
// constants have 'untyped' types when they
// should be defaulted by the typechecker.
t = ssa.DefaultType(t).(*types.Basic)
}
switch t.Kind() {
case types.Bool:
return false
case types.Int:
return int(0)
case types.Int8:
return int8(0)
case types.Int16:
return int16(0)
case types.Int32:
return int32(0)
case types.Int64:
return int64(0)
case types.Uint:
return uint(0)
case types.Uint8:
return uint8(0)
case types.Uint16:
return uint16(0)
case types.Uint32:
return uint32(0)
case types.Uint64:
return uint64(0)
case types.Uintptr:
return uintptr(0)
case types.Float32:
return float32(0)
case types.Float64:
return float64(0)
case types.Complex64:
return complex64(0)
case types.Complex128:
return complex128(0)
case types.String:
return ""
case types.UnsafePointer:
return unsafe.Pointer(nil)
default:
panic(fmt.Sprint("zero for unexpected type:", t))
}
case *types.Pointer:
return (*value)(nil)
case *types.Array:
a := make(array, t.Len())
for i := range a {
a[i] = zero(t.Elem())
}
return a
case *types.Named:
return zero(t.Underlying())
case *types.Interface:
return iface{} // nil type, methodset and value
case *types.Slice:
return []value(nil)
case *types.Struct:
s := make(structure, t.NumFields())
for i := range s {
s[i] = zero(t.Field(i).Type())
}
return s
case *types.Tuple:
if t.Len() == 1 {
return zero(t.At(0).Type())
}
s := make(tuple, t.Len())
for i := range s {
s[i] = zero(t.At(i).Type())
}
return s
case *types.Chan:
return chan value(nil)
case *types.Map:
if usesBuiltinMap(t.Key()) {
return map[value]value(nil)
}
return (*hashmap)(nil)
case *types.Signature:
return (*ssa.Function)(nil)
}
panic(fmt.Sprint("zero: unexpected ", t))
}
func equalType(x, y types.Type) error {
if reflect.TypeOf(x) != reflect.TypeOf(y) {
return fmt.Errorf("unequal kinds: %T vs %T", x, y)
}
switch x := x.(type) {
case *types.Interface:
y := y.(*types.Interface)
// TODO(gri): enable separate emission of Embedded interfaces
// and ExplicitMethods then use this logic.
// if x.NumEmbeddeds() != y.NumEmbeddeds() {
// return fmt.Errorf("unequal number of embedded interfaces: %d vs %d",
// x.NumEmbeddeds(), y.NumEmbeddeds())
// }
// for i := 0; i < x.NumEmbeddeds(); i++ {
// xi := x.Embedded(i)
// yi := y.Embedded(i)
// if xi.String() != yi.String() {
// return fmt.Errorf("mismatched %th embedded interface: %s vs %s",
// i, xi, yi)
// }
// }
// if x.NumExplicitMethods() != y.NumExplicitMethods() {
// return fmt.Errorf("unequal methods: %d vs %d",
// x.NumExplicitMethods(), y.NumExplicitMethods())
// }
// for i := 0; i < x.NumExplicitMethods(); i++ {
// xm := x.ExplicitMethod(i)
// ym := y.ExplicitMethod(i)
// if xm.Name() != ym.Name() {
// return fmt.Errorf("mismatched %th method: %s vs %s", i, xm, ym)
// }
// if err := equalType(xm.Type(), ym.Type()); err != nil {
// return fmt.Errorf("mismatched %s method: %s", xm.Name(), err)
// }
// }
if x.NumMethods() != y.NumMethods() {
return fmt.Errorf("unequal methods: %d vs %d",
x.NumMethods(), y.NumMethods())
}
for i := 0; i < x.NumMethods(); i++ {
xm := x.Method(i)
ym := y.Method(i)
if xm.Name() != ym.Name() {
return fmt.Errorf("mismatched %dth method: %s vs %s", i, xm, ym)
}
if err := equalType(xm.Type(), ym.Type()); err != nil {
return fmt.Errorf("mismatched %s method: %s", xm.Name(), err)
}
}
case *types.Array:
y := y.(*types.Array)
if x.Len() != y.Len() {
return fmt.Errorf("unequal array lengths: %d vs %d", x.Len(), y.Len())
}
if err := equalType(x.Elem(), y.Elem()); err != nil {
return fmt.Errorf("array elements: %s", err)
}
case *types.Basic:
y := y.(*types.Basic)
if x.Kind() != y.Kind() {
return fmt.Errorf("unequal basic types: %s vs %s", x, y)
}
case *types.Chan:
y := y.(*types.Chan)
if x.Dir() != y.Dir() {
return fmt.Errorf("unequal channel directions: %d vs %d", x.Dir(), y.Dir())
}
if err := equalType(x.Elem(), y.Elem()); err != nil {
return fmt.Errorf("channel elements: %s", err)
}
case *types.Map:
y := y.(*types.Map)
if err := equalType(x.Key(), y.Key()); err != nil {
return fmt.Errorf("map keys: %s", err)
}
if err := equalType(x.Elem(), y.Elem()); err != nil {
return fmt.Errorf("map values: %s", err)
}
case *types.Named:
y := y.(*types.Named)
if x.String() != y.String() {
return fmt.Errorf("unequal named types: %s vs %s", x, y)
}
case *types.Pointer:
y := y.(*types.Pointer)
if err := equalType(x.Elem(), y.Elem()); err != nil {
return fmt.Errorf("pointer elements: %s", err)
}
case *types.Signature:
y := y.(*types.Signature)
if err := equalType(x.Params(), y.Params()); err != nil {
return fmt.Errorf("parameters: %s", err)
}
if err := equalType(x.Results(), y.Results()); err != nil {
return fmt.Errorf("results: %s", err)
}
if x.Variadic() != y.Variadic() {
return fmt.Errorf("unequal varidicity: %t vs %t",
x.Variadic(), y.Variadic())
}
if (x.Recv() != nil) != (y.Recv() != nil) {
return fmt.Errorf("unequal receivers: %s vs %s", x.Recv(), y.Recv())
}
if x.Recv() != nil {
// TODO(adonovan): fix: this assertion fires for interface methods.
// The type of the receiver of an interface method is a named type
// if the Package was loaded from export data, or an unnamed (interface)
// type if the Package was produced by type-checking ASTs.
// if err := equalType(x.Recv().Type(), y.Recv().Type()); err != nil {
// return fmt.Errorf("receiver: %s", err)
// }
}
case *types.Slice:
y := y.(*types.Slice)
if err := equalType(x.Elem(), y.Elem()); err != nil {
return fmt.Errorf("slice elements: %s", err)
}
case *types.Struct:
y := y.(*types.Struct)
if x.NumFields() != y.NumFields() {
return fmt.Errorf("unequal struct fields: %d vs %d",
x.NumFields(), y.NumFields())
}
for i := 0; i < x.NumFields(); i++ {
xf := x.Field(i)
yf := y.Field(i)
if xf.Name() != yf.Name() {
return fmt.Errorf("mismatched fields: %s vs %s", xf, yf)
}
if err := equalType(xf.Type(), yf.Type()); err != nil {
return fmt.Errorf("struct field %s: %s", xf.Name(), err)
}
if x.Tag(i) != y.Tag(i) {
return fmt.Errorf("struct field %s has unequal tags: %q vs %q",
xf.Name(), x.Tag(i), y.Tag(i))
}
}
case *types.Tuple:
y := y.(*types.Tuple)
if x.Len() != y.Len() {
return fmt.Errorf("unequal tuple lengths: %d vs %d", x.Len(), y.Len())
}
for i := 0; i < x.Len(); i++ {
if err := equalType(x.At(i).Type(), y.At(i).Type()); err != nil {
return fmt.Errorf("tuple element %d: %s", i, err)
}
}
}
return nil
}
// hashFor computes the hash of t.
func (h Hasher) hashFor(t types.Type) uint32 {
// See Identical for rationale.
switch t := t.(type) {
case *types.Basic:
return uint32(t.Kind())
case *types.Array:
return 9043 + 2*uint32(t.Len()) + 3*h.Hash(t.Elem())
case *types.Slice:
return 9049 + 2*h.Hash(t.Elem())
case *types.Struct:
var hash uint32 = 9059
for i, n := 0, t.NumFields(); i < n; i++ {
f := t.Field(i)
if f.Anonymous() {
hash += 8861
}
hash += hashString(t.Tag(i))
hash += hashString(f.Name()) // (ignore f.Pkg)
hash += h.Hash(f.Type())
}
return hash
case *types.Pointer:
return 9067 + 2*h.Hash(t.Elem())
case *types.Signature:
var hash uint32 = 9091
if t.Variadic() {
hash *= 8863
}
return hash + 3*h.hashTuple(t.Params()) + 5*h.hashTuple(t.Results())
case *types.Interface:
var hash uint32 = 9103
for i, n := 0, t.NumMethods(); i < n; i++ {
// See go/types.identicalMethods for rationale.
// Method order is not significant.
// Ignore m.Pkg().
m := t.Method(i)
hash += 3*hashString(m.Name()) + 5*h.Hash(m.Type())
}
return hash
case *types.Map:
return 9109 + 2*h.Hash(t.Key()) + 3*h.Hash(t.Elem())
case *types.Chan:
return 9127 + 2*uint32(t.Dir()) + 3*h.Hash(t.Elem())
case *types.Named:
// Not safe with a copying GC; objects may move.
return uint32(reflect.ValueOf(t.Obj()).Pointer())
case *types.Tuple:
return h.hashTuple(t)
}
panic(t)
}
func reflectKind(t types.Type) reflect.Kind {
switch t := t.(type) {
case *types.Named:
return reflectKind(t.Underlying())
case *types.Basic:
switch t.Kind() {
case types.Bool:
return reflect.Bool
case types.Int:
return reflect.Int
case types.Int8:
return reflect.Int8
case types.Int16:
return reflect.Int16
case types.Int32:
return reflect.Int32
case types.Int64:
return reflect.Int64
case types.Uint:
return reflect.Uint
case types.Uint8:
return reflect.Uint8
case types.Uint16:
return reflect.Uint16
case types.Uint32:
return reflect.Uint32
case types.Uint64:
return reflect.Uint64
case types.Uintptr:
return reflect.Uintptr
case types.Float32:
return reflect.Float32
case types.Float64:
return reflect.Float64
case types.Complex64:
return reflect.Complex64
case types.Complex128:
return reflect.Complex128
case types.String:
return reflect.String
case types.UnsafePointer:
return reflect.UnsafePointer
}
case *types.Array:
return reflect.Array
case *types.Chan:
return reflect.Chan
case *types.Signature:
return reflect.Func
case *types.Interface:
return reflect.Interface
case *types.Map:
return reflect.Map
case *types.Pointer:
return reflect.Ptr
case *types.Slice:
return reflect.Slice
case *types.Struct:
return reflect.Struct
}
panic(fmt.Sprint("unexpected type: ", t))
}
