func (u *Unexporter) usedObjects() map[types.Object]bool {
objs := make(map[types.Object]bool)
for _, pkgInfo := range u.packages {
// easy path
for id, obj := range pkgInfo.Uses {
// ignore builtin value
if obj.Pkg() == nil {
continue
}
// if it's a type from different package, store it
if obj.Pkg() != pkgInfo.Pkg {
objs[obj] = true
}
// embedded fields are marked as used, no much which package the original type belongs to,
// so that they won't show up in the renaming list #16
if field := pkgInfo.Defs[id]; field != nil {
// embdded field identifier is the same as it's type
objs[field] = true
}
}
}
// Check assignability
for key := range u.satisfy() {
var (
lhs, rhs *types.Named
ok bool
)
if lhs, ok = key.LHS.(*types.Named); !ok {
continue
}
switch r := key.RHS.(type) {
case *types.Named:
rhs = r
case *types.Pointer: // the receiver could be a pointer, see #14
rhs = r.Elem().(*types.Named)
default:
continue
}
lset := u.msets.MethodSet(key.LHS)
rset := u.msets.MethodSet(key.RHS)
for i := 0; i < lset.Len(); i++ {
obj := lset.At(i).Obj()
// LHS are the abstract methods, they are only exported if there are other packages using it
if lhs.Obj().Pkg() != rhs.Obj().Pkg() {
objs[obj] = true
}
// if satisfied by type within the same package only, it should be unexported
// however, we should not rename from the concret method side, but from the
// interface side, carefully exclude concret methods that don't implement an abstract method (see #14, #17)
rsel := rset.Lookup(rhs.Obj().Pkg(), obj.Name())
objs[rsel.Obj()] = true
}
}
return objs
}
func getConsts(named *types.Named) string {
pkg := named.Obj().Pkg()
var s []string
for _, name := range pkg.Scope().Names() {
obj := pkg.Scope().Lookup(name)
if konst, ok := obj.(*types.Const); ok {
if konst.Type() == named {
s = append(s, strings.Replace(konst.Val().String(), "\"", "", -1))
}
}
}
sort.Strings(s)
return strings.Trim(strings.Join(s, " | "), " ")
}
func (w *PkgWalker) lookupNamedField(named *types.Named, name string) *types.Named {
if istruct, ok := named.Underlying().(*types.Struct); ok {
for i := 0; i < istruct.NumFields(); i++ {
field := istruct.Field(i)
if field.Anonymous() {
fieldType := orgType(field.Type())
if typ, ok := fieldType.(*types.Named); ok {
if na := w.lookupNamedField(typ, name); na != nil {
return na
}
}
} else {
if field.Name() == name {
return named
}
}
}
}
return nil
}
func (g *Grapher) assignMethodPaths(named *types.Named, prefix []string, pkgscope bool) {
for i := 0; i < named.NumMethods(); i++ {
m := named.Method(i)
path := append(append([]string{}, prefix...), m.Name())
g.paths[m] = path
g.exported[m] = ast.IsExported(m.Name())
g.pkgscope[m] = pkgscope
if s := m.Scope(); s != nil {
g.assignPaths(s, path, false)
}
}
if iface, ok := named.Underlying().(*types.Interface); ok {
for i := 0; i < iface.NumExplicitMethods(); i++ {
m := iface.Method(i)
path := append(append([]string{}, prefix...), m.Name())
g.paths[m] = path
g.exported[m] = ast.IsExported(m.Name())
g.pkgscope[m] = pkgscope
if s := m.Scope(); s != nil {
g.assignPaths(s, path, false)
}
}
}
}
func (d *DIBuilder) descriptorNamed(t *types.Named) llvm.Value {
// Create a placeholder for the named type, to terminate cycles.
placeholder := llvm.MDNode(nil)
d.types.Set(t, placeholder)
var diFile llvm.Value
var line int
if file := d.fset.File(t.Obj().Pos()); file != nil {
line = file.Line(t.Obj().Pos())
diFile = d.getFile(file)
}
typedef := d.builder.CreateTypedef(llvm.DITypedef{
Type: d.DIType(t.Underlying()),
Name: t.Obj().Name(),
File: diFile,
Line: line,
})
placeholder.ReplaceAllUsesWith(typedef)
return typedef
}
func (w *PkgWalker) lookupNamedMethod(named *types.Named, name string) (types.Object, *types.Named) {
if iface, ok := named.Underlying().(*types.Interface); ok {
for i := 0; i < iface.NumMethods(); i++ {
fn := iface.Method(i)
if fn.Name() == name {
return fn, named
}
}
for i := 0; i < iface.NumEmbeddeds(); i++ {
if obj, na := w.lookupNamedMethod(iface.Embedded(i), name); obj != nil {
return obj, na
}
}
return nil, nil
}
if istruct, ok := named.Underlying().(*types.Struct); ok {
for i := 0; i < named.NumMethods(); i++ {
fn := named.Method(i)
if fn.Name() == name {
return fn, named
}
}
for i := 0; i < istruct.NumFields(); i++ {
field := istruct.Field(i)
if !field.Anonymous() {
continue
}
if typ, ok := field.Type().(*types.Named); ok {
if obj, na := w.lookupNamedMethod(typ, name); obj != nil {
return obj, na
}
}
}
}
return nil, nil
}
// Type definitions are only carried through to Haxe to allow access to objects as if they were native Haxe classes.
// TODO consider renaming
func (l langType) TypeStart(nt *types.Named, err string) string {
typName := "GoType" + l.LangName("", nt.String())
hxTyp := l.LangType(nt.Obj().Type(), false, nt.String())
ret := ""
switch hxTyp {
case "Object":
ret += "class " + typName
ret += " extends " + hxTyp + " {\n"
default:
ret += "abstract " + typName + "(" + hxTyp + ") from " + hxTyp + " to " + hxTyp + " {\n"
}
switch nt.Underlying().(type) {
case *types.Struct:
str := nt.Underlying().(*types.Struct)
ret += "inline public function new(){ super new(" + strconv.Itoa(int(haxeStdSizes.Sizeof(nt.Obj().Type()))) + "); }\n"
flds := []string{}
for f := 0; f < str.NumFields(); f++ {
fName := str.Field(f).Name()
if len(fName) > 0 {
if unicode.IsUpper(rune(fName[0])) {
flds = append(flds, fName)
}
}
}
sort.Strings(flds) // make sure the fields are always in the same order in the file
for _, fName := range flds {
for f := 0; f < str.NumFields(); f++ {
if fName == str.Field(f).Name() {
haxeTyp := l.LangType(str.Field(f).Type(), false, nt.String())
fOff := fieldOffset(str, f)
sfx := loadStoreSuffix(str.Field(f).Type(), true)
ret += fmt.Sprintf("public var _%s(get,set):%s;\n", fName, haxeTyp)
ret += fmt.Sprintf("function get__%s():%s { return get%s%d); }\n",
fName, haxeTyp, sfx, fOff)
ret += fmt.Sprintf("function set__%s(v:%s):%s { return set%s%d,v); }\n",
fName, haxeTyp, haxeTyp, sfx, fOff)
break
}
}
}
case *types.Array:
ret += "inline public function new(){ super new(" + strconv.Itoa(int(haxeStdSizes.Sizeof(nt.Obj().Type()))) + "); }\n"
default: // TODO not yet sure how to handle named types that are not structs
ret += "inline public function new(v:" + hxTyp + ") { this = v; }\n"
}
meths := []string{}
for m := 0; m < nt.NumMethods(); m++ {
mName := nt.Method(m).Name()
if len(mName) > 0 {
if unicode.IsUpper(rune(mName[0])) {
meths = append(meths, mName)
}
}
}
sort.Strings(meths) // make sure the methods always appear in the same order in the file
for _, mName := range meths {
for m := 0; m < nt.NumMethods(); m++ {
meth := nt.Method(m)
if mName == meth.Name() {
sig := meth.Type().(*types.Signature)
ret += "// " + mName + " " + sig.String() + "\n"
ret += "public function _" + mName + "("
for p := 0; p < sig.Params().Len(); p++ {
if p > 0 {
ret += ","
}
ret += "_" + sig.Params().At(p).Name() + ":" + l.LangType(sig.Params().At(p).Type(), false, nt.String())
}
ret += ")"
switch sig.Results().Len() {
case 0:
ret += ":Void "
case 1:
ret += ":" + l.LangType(sig.Results().At(0).Type(), false, nt.String())
default:
ret += ":{"
for r := 0; r < sig.Results().Len(); r++ {
if r > 0 {
ret += ","
}
ret += fmt.Sprintf("r%d:%s", r, l.LangType(sig.Results().At(r).Type(), false, nt.String()))
}
ret += "}"
}
ret += "{\n\t"
if sig.Results().Len() > 0 {
ret += "return "
}
fnToCall := l.LangName(
nt.Obj().Pkg().Name()+":"+sig.Recv().Type().String(),
meth.Name())
ret += `Go_` + fnToCall + `.hx(this`
for p := 0; p < sig.Params().Len(); p++ {
ret += ", _" + sig.Params().At(p).Name()
}
ret += ");\n}\n"
}
}
}
l.PogoComp().WriteAsClass(typName, ret+"}\n")
return "" //ret
}
// addRuntimeType is called for each concrete type that can be the
// dynamic type of some interface or reflect.Value.
// Adapted from needMethods in go/ssa/builder.go
//
func (r *rta) addRuntimeType(T types.Type, skip bool) {
if prev, ok := r.result.RuntimeTypes.At(T).(bool); ok {
if skip && !prev {
r.result.RuntimeTypes.Set(T, skip)
}
return
}
r.result.RuntimeTypes.Set(T, skip)
mset := r.prog.MethodSets.MethodSet(T)
if _, ok := T.Underlying().(*types.Interface); !ok {
// T is a new concrete type.
for i, n := 0, mset.Len(); i < n; i++ {
sel := mset.At(i)
m := sel.Obj()
if m.Exported() {
// Exported methods are always potentially callable via reflection.
r.addReachable(r.prog.MethodValue(sel), true)
}
}
// Add callgraph edge for each existing dynamic
// "invoke"-mode call via that interface.
for _, I := range r.interfaces(T) {
sites, _ := r.invokeSites.At(I).([]ssa.CallInstruction)
for _, site := range sites {
r.addInvokeEdge(site, T)
}
}
}
// Precondition: T is not a method signature (*Signature with Recv()!=nil).
// Recursive case: skip => don't call makeMethods(T).
// Each package maintains its own set of types it has visited.
var n *types.Named
switch T := T.(type) {
case *types.Named:
n = T
case *types.Pointer:
n, _ = T.Elem().(*types.Named)
}
if n != nil {
owner := n.Obj().Pkg()
if owner == nil {
return // built-in error type
}
}
// Recursion over signatures of each exported method.
for i := 0; i < mset.Len(); i++ {
if mset.At(i).Obj().Exported() {
sig := mset.At(i).Type().(*types.Signature)
r.addRuntimeType(sig.Params(), true) // skip the Tuple itself
r.addRuntimeType(sig.Results(), true) // skip the Tuple itself
}
}
switch t := T.(type) {
case *types.Basic:
// nop
case *types.Interface:
// nop---handled by recursion over method set.
case *types.Pointer:
r.addRuntimeType(t.Elem(), false)
case *types.Slice:
r.addRuntimeType(t.Elem(), false)
case *types.Chan:
r.addRuntimeType(t.Elem(), false)
case *types.Map:
r.addRuntimeType(t.Key(), false)
r.addRuntimeType(t.Elem(), false)
case *types.Signature:
if t.Recv() != nil {
panic(fmt.Sprintf("Signature %s has Recv %s", t, t.Recv()))
}
r.addRuntimeType(t.Params(), true) // skip the Tuple itself
r.addRuntimeType(t.Results(), true) // skip the Tuple itself
case *types.Named:
// A pointer-to-named type can be derived from a named
// type via reflection. It may have methods too.
r.addRuntimeType(types.NewPointer(T), false)
// Consider 'type T struct{S}' where S has methods.
// Reflection provides no way to get from T to struct{S},
// only to S, so the method set of struct{S} is unwanted,
// so set 'skip' flag during recursion.
r.addRuntimeType(t.Underlying(), true)
case *types.Array:
r.addRuntimeType(t.Elem(), false)
case *types.Struct:
for i, n := 0, t.NumFields(); i < n; i++ {
r.addRuntimeType(t.Field(i).Type(), false)
}
case *types.Tuple:
for i, n := 0, t.Len(); i < n; i++ {
r.addRuntimeType(t.At(i).Type(), false)
}
default:
panic(T)
}
}