func createDef(obj types.Object, ident *ast.Ident, ctx *getDefinitionsContext, isType bool) *Definition {
fullName := getFullName(obj, ctx, isType)
if def, ok := ctx.defs[fullName]; ok {
return def
}
def := new(Definition)
def.Name = fullName
def.Pkg = obj.Pkg()
def.IsExported = obj.Exported()
def.TypeOf = reflect.TypeOf(obj)
def.SimpleName = obj.Name()
def.Usages = make([]*Usage, 0)
def.InterfacesDefs = make([]*Definition, 0)
if ident != nil {
position := ctx.fset.Position(ident.Pos())
def.File = position.Filename
def.Line = position.Line
def.Offset = position.Offset
def.Col = position.Column
}
if !types.IsInterface(obj.Type()) {
fillInterfaces(def, obj, ctx)
}
ctx.defs[def.Name] = def
logDefinition(def, obj, ident, ctx)
return def
}
func (b *candidateCollector) asCandidate(obj types.Object) Candidate {
objClass := classifyObject(obj)
var typ types.Type
switch objClass {
case "const", "func", "var":
typ = obj.Type()
case "type":
typ = obj.Type().Underlying()
}
var typStr string
switch t := typ.(type) {
case *types.Interface:
typStr = "interface"
case *types.Struct:
typStr = "struct"
default:
if _, isBuiltin := obj.(*types.Builtin); isBuiltin {
typStr = builtinTypes[obj.Name()]
} else if t != nil {
typStr = types.TypeString(t, b.qualify)
}
}
return Candidate{
Class: objClass,
Name: obj.Name(),
Type: typStr,
}
}
func isStringer(obj types.Object) bool {
switch obj := obj.(type) {
case *types.Func:
if obj.Name() != "String" {
return false
}
sig, ok := obj.Type().(*types.Signature)
if !ok {
return false
}
if sig.Recv() == nil {
return false
}
if sig.Params().Len() != 0 {
return false
}
res := sig.Results()
if res.Len() != 1 {
return false
}
ret := res.At(0).Type()
if ret != types.Universe.Lookup("string").Type() {
return false
}
return true
default:
return false
}
return false
}
func updateGetDefinitionsContext(ctx *getDefinitionsContext, def *Definition, ident *ast.Ident, obj types.Object) {
switch obj.(type) {
case *types.Var:
//Processing vars later to be sure that all info about structs already filled
ctx.vars = append(ctx.vars, newObjectWithIdent(obj, ident))
case *types.Func:
//Processing funcs later to be sure that all info about interfaces already filled
ctx.funcs = append(ctx.funcs, newObjectWithIdent(obj, ident))
case *types.TypeName:
//If the underlying type is struct, then filling
//positions of struct's fields (key) and struct name(value)
//to map. Then we can extract struct name for fields when
//will be analyze them.
t := obj.(*types.TypeName)
underlyingType := t.Type().Underlying()
switch underlyingType.(type) {
case *types.Struct:
s := underlyingType.(*types.Struct)
for i := 0; i < s.NumFields(); i++ {
field := s.Field(i)
ctx.structs[posToStr(ctx.fset, field.Pos())] = obj.Name()
}
}
}
//Check for interfaces
underlyingType := obj.Type().Underlying()
switch underlyingType.(type) {
case *types.Interface:
d := new(defWithInterface)
d.def = def
d.interfac = underlyingType.(*types.Interface)
ctx.interfaces = append(ctx.interfaces, d)
}
}
// equalObj reports how x and y differ. They are assumed to belong to
// different universes so cannot be compared directly.
func equalObj(x, y types.Object) error {
if reflect.TypeOf(x) != reflect.TypeOf(y) {
return fmt.Errorf("%T vs %T", x, y)
}
xt := x.Type()
yt := y.Type()
switch x.(type) {
case *types.Var, *types.Func:
// ok
case *types.Const:
xval := x.(*types.Const).Val()
yval := y.(*types.Const).Val()
// Use string comparison for floating-point values since rounding is permitted.
if constant.Compare(xval, token.NEQ, yval) &&
!(xval.Kind() == constant.Float && xval.String() == yval.String()) {
return fmt.Errorf("unequal constants %s vs %s", xval, yval)
}
case *types.TypeName:
xt = xt.Underlying()
yt = yt.Underlying()
default:
return fmt.Errorf("unexpected %T", x)
}
return equalType(xt, yt)
}
//getFullName is returning unique name of obj.
func getFullName(obj types.Object, ctx *getDefinitionsContext, isType bool) string {
if obj == nil {
return ""
}
if isType {
return obj.Type().String()
}
result := ""
switch obj.(type) {
case *types.Func:
f := obj.(*types.Func)
r := strings.NewReplacer("(", "", "*", "", ")", "")
result = r.Replace(f.FullName())
default:
if obj.Pkg() != nil {
result += obj.Pkg().Path()
result += "."
}
if packageName, ok := ctx.structs[posToStr(ctx.fset, obj.Pos())]; ok {
result += packageName
result += "."
}
result += obj.Name()
}
return result
}
func (f *Function) addParamObj(obj types.Object) *Parameter {
name := obj.Name()
if name == "" {
name = fmt.Sprintf("arg%d", len(f.Params))
}
param := f.addParam(name, obj.Type(), obj.Pos())
param.object = obj
return param
}
// addSpilledParam declares a parameter that is pre-spilled to the
// stack; the function body will load/store the spilled location.
// Subsequent lifting will eliminate spills where possible.
//
func (f *Function) addSpilledParam(obj types.Object) {
param := f.addParamObj(obj)
spill := &Alloc{Comment: obj.Name()}
spill.setType(types.NewPointer(obj.Type()))
spill.setPos(obj.Pos())
f.objects[obj] = spill
f.Locals = append(f.Locals, spill)
f.emit(spill)
f.emit(&Store{Addr: spill, Val: param})
}
func formatMember(obj types.Object, maxname int) string {
qualifier := types.RelativeTo(obj.Pkg())
var buf bytes.Buffer
fmt.Fprintf(&buf, "%-5s %-*s", tokenOf(obj), maxname, obj.Name())
switch obj := obj.(type) {
case *types.Const:
fmt.Fprintf(&buf, " %s = %s", types.TypeString(obj.Type(), qualifier), obj.Val().String())
case *types.Func:
fmt.Fprintf(&buf, " %s", types.TypeString(obj.Type(), qualifier))
case *types.TypeName:
// Abbreviate long aggregate type names.
var abbrev string
switch t := obj.Type().Underlying().(type) {
case *types.Interface:
if t.NumMethods() > 1 {
abbrev = "interface{...}"
}
case *types.Struct:
if t.NumFields() > 1 {
abbrev = "struct{...}"
}
}
if abbrev == "" {
fmt.Fprintf(&buf, " %s", types.TypeString(obj.Type().Underlying(), qualifier))
} else {
fmt.Fprintf(&buf, " %s", abbrev)
}
case *types.Var:
fmt.Fprintf(&buf, " %s", types.TypeString(obj.Type(), qualifier))
}
return buf.String()
}
func (p *exporter) obj(obj types.Object) {
if trace {
p.tracef("object %s {\n", obj.Name())
defer p.tracef("}\n")
}
switch obj := obj.(type) {
case *types.Const:
p.int(constTag)
p.string(obj.Name())
p.typ(obj.Type())
p.value(obj.Val())
case *types.TypeName:
p.int(typeTag)
// name is written by corresponding named type
p.typ(obj.Type().(*types.Named))
case *types.Var:
p.int(varTag)
p.string(obj.Name())
p.typ(obj.Type())
case *types.Func:
p.int(funcTag)
p.string(obj.Name())
p.typ(obj.Type())
default:
panic(fmt.Sprintf("unexpected object type %T", obj))
}
}
func (p *exporter) obj(obj types.Object) {
switch obj := obj.(type) {
case *types.Const:
p.tag(constTag)
p.pos(obj)
p.qualifiedName(obj)
p.typ(obj.Type())
p.value(obj.Val())
case *types.TypeName:
p.tag(typeTag)
p.typ(obj.Type())
case *types.Var:
p.tag(varTag)
p.pos(obj)
p.qualifiedName(obj)
p.typ(obj.Type())
case *types.Func:
p.tag(funcTag)
p.pos(obj)
p.qualifiedName(obj)
sig := obj.Type().(*types.Signature)
p.paramList(sig.Params(), sig.Variadic())
p.paramList(sig.Results(), false)
default:
log.Fatalf("gcimporter: unexpected object %v (%T)", obj, obj)
}
}
func (w *Walker) emitObj(obj types.Object) {
switch obj := obj.(type) {
case *types.Const:
w.emitf("const %s %s", obj.Name(), w.typeString(obj.Type()))
w.emitf("const %s = %s", obj.Name(), obj.Val())
case *types.Var:
w.emitf("var %s %s", obj.Name(), w.typeString(obj.Type()))
case *types.TypeName:
w.emitType(obj)
case *types.Func:
w.emitFunc(obj)
default:
panic("unknown object: " + obj.String())
}
}
func addInterface(obj types.Object, ident *ast.Ident, ctx *getDefinitionsContext) {
interfac := obj.Type().Underlying().(*types.Interface)
def := createDef(obj, ident, ctx, true)
updateGetDefinitionsContext(ctx, def, ident, obj)
util.Debug("adding interface [%s] [%v] [%v] [%v]", def.Name, def.Pkg, obj.Type().Underlying(), obj.Type())
//Adding all methods of interface
for i := 0; i < interfac.NumMethods(); i++ {
f := interfac.Method(i)
def := createDef(f, nil, ctx, false)
util.Debug("\tadding method [%v] [%s]", f, def.Name)
updateGetDefinitionsContext(ctx, def, ident, f)
}
}
func (p *printer) printObj(obj types.Object) {
p.print(obj.Name())
typ, basic := obj.Type().Underlying().(*types.Basic)
if basic && typ.Info()&types.IsUntyped != 0 {
// don't write untyped types
} else {
p.print(" ")
p.writeType(p.pkg, obj.Type())
}
if obj, ok := obj.(*types.Const); ok {
floatFmt := basic && typ.Info()&(types.IsFloat|types.IsComplex) != 0
p.print(" = ")
p.print(valString(obj.Val(), floatFmt))
}
}
func newFuncFrom(p *Package, parent string, obj types.Object, sig *types.Signature) (Func, error) {
haserr := false
res := sig.Results()
var ret types.Type
switch res.Len() {
case 2:
if !isErrorType(res.At(1).Type()) {
return Func{}, fmt.Errorf(
"bind: second result value must be of type error: %s",
obj,
)
}
haserr = true
ret = res.At(0).Type()
case 1:
if isErrorType(res.At(0).Type()) {
haserr = true
ret = nil
} else {
ret = res.At(0).Type()
}
case 0:
ret = nil
default:
return Func{}, fmt.Errorf("bind: too many results to return: %v", obj)
}
id := obj.Pkg().Name() + "_" + obj.Name()
if parent != "" {
id = obj.Pkg().Name() + "_" + parent + "_" + obj.Name()
}
return Func{
pkg: p,
sig: newSignatureFrom(p, sig),
typ: obj.Type(),
name: obj.Name(),
id: id,
doc: p.getDoc(parent, obj),
ret: ret,
err: haserr,
}, nil
}
func objectKind(obj types.Object) string {
switch obj := obj.(type) {
case *types.PkgName:
return "imported package name"
case *types.TypeName:
return "type"
case *types.Var:
if obj.IsField() {
return "field"
}
case *types.Func:
if obj.Type().(*types.Signature).Recv() != nil {
return "method"
}
}
// label, func, var, const
return strings.ToLower(strings.TrimPrefix(reflect.TypeOf(obj).String(), "*types."))
}
func (sym *symtab) addSymbol(obj types.Object) {
fn := types.ObjectString(obj, nil)
n := obj.Name()
pkg := obj.Pkg()
id := n
if pkg != nil {
id = pkg.Name() + "_" + n
}
switch obj.(type) {
case *types.Const:
sym.syms[fn] = &symbol{
gopkg: pkg,
goobj: obj,
kind: skConst,
id: id,
goname: n,
cgoname: "cgo_const_" + id,
cpyname: "cpy_const_" + id,
}
sym.addType(obj, obj.Type())
case *types.Var:
sym.syms[fn] = &symbol{
gopkg: pkg,
goobj: obj,
kind: skVar,
id: id,
goname: n,
cgoname: "cgo_var_" + id,
cpyname: "cpy_var_" + id,
}
sym.addType(obj, obj.Type())
case *types.Func:
sym.syms[fn] = &symbol{
gopkg: pkg,
goobj: obj,
kind: skFunc,
id: id,
goname: n,
cgoname: "cgo_func_" + id,
cpyname: "cpy_func_" + id,
}
sig := obj.Type().Underlying().(*types.Signature)
sym.processTuple(sig.Params())
sym.processTuple(sig.Results())
case *types.TypeName:
sym.addType(obj, obj.Type())
default:
panic(fmt.Errorf("gopy: handled object [%#v]", obj))
}
}
func (w *Walker) emitObj(obj types.Object) {
switch obj := obj.(type) {
case *types.Const:
w.emitf("const %s %s", obj.Name(), w.typeString(obj.Type()))
x := obj.Val()
short := x.String()
exact := x.ExactString()
if short == exact {
w.emitf("const %s = %s", obj.Name(), short)
} else {
w.emitf("const %s = %s // %s", obj.Name(), short, exact)
}
case *types.Var:
w.emitf("var %s %s", obj.Name(), w.typeString(obj.Type()))
case *types.TypeName:
w.emitType(obj)
case *types.Func:
w.emitFunc(obj)
default:
panic("unknown object: " + obj.String())
}
}
// memberFromObject populates package pkg with a member for the
// typechecker object obj.
//
// For objects from Go source code, syntax is the associated syntax
// tree (for funcs and vars only); it will be used during the build
// phase.
//
func memberFromObject(pkg *Package, obj types.Object, syntax ast.Node) {
name := obj.Name()
switch obj := obj.(type) {
case *types.TypeName:
pkg.Members[name] = &Type{
object: obj,
pkg: pkg,
}
case *types.Const:
c := &NamedConst{
object: obj,
Value: NewConst(obj.Val(), obj.Type()),
pkg: pkg,
}
pkg.values[obj] = c.Value
pkg.Members[name] = c
case *types.Var:
g := &Global{
Pkg: pkg,
name: name,
object: obj,
typ: types.NewPointer(obj.Type()), // address
pos: obj.Pos(),
}
pkg.values[obj] = g
pkg.Members[name] = g
case *types.Func:
sig := obj.Type().(*types.Signature)
if sig.Recv() == nil && name == "init" {
pkg.ninit++
name = fmt.Sprintf("init#%d", pkg.ninit)
}
fn := &Function{
name: name,
object: obj,
Signature: sig,
syntax: syntax,
pos: obj.Pos(),
Pkg: pkg,
Prog: pkg.Prog,
}
if syntax == nil {
fn.Synthetic = "loaded from gc object file"
}
pkg.values[obj] = fn
if sig.Recv() == nil {
pkg.Members[name] = fn // package-level function
}
default: // (incl. *types.Package)
panic("unexpected Object type: " + obj.String())
}
}
func (p *exporter) obj(obj types.Object) {
switch obj := obj.(type) {
case *types.Const:
p.tag(constTag)
p.pos(obj)
p.qualifiedName(obj)
p.typ(obj.Type())
p.value(obj.Val())
case *types.TypeName:
p.tag(typeTag)
p.typ(obj.Type())
case *types.Var:
p.tag(varTag)
p.pos(obj)
p.qualifiedName(obj)
p.typ(obj.Type())
case *types.Func:
p.tag(funcTag)
p.pos(obj)
p.qualifiedName(obj)
sig := obj.Type().(*types.Signature)
p.paramList(sig.Params(), sig.Variadic())
p.paramList(sig.Results(), false)
// Alias-related code. Keep for now.
// case *types_Alias:
// // make sure the original is exported before the alias
// // (if the alias declaration was invalid, orig will be nil)
// orig := original(obj)
// if orig != nil && !p.reexported[orig] {
// p.obj(orig)
// p.reexported[orig] = true
// }
// p.tag(aliasTag)
// p.pos(obj)
// p.string(obj.Name())
// p.qualifiedName(orig)
default:
log.Fatalf("gcimporter: unexpected object %v (%T)", obj, obj)
}
}
// getDoc returns the doc string associated with types.Object
// parent is the name of the containing scope ("" for global scope)
func (p *Package) getDoc(parent string, o types.Object) string {
n := o.Name()
switch o.(type) {
case *types.Const:
for _, c := range p.doc.Consts {
for _, cn := range c.Names {
if n == cn {
return c.Doc
}
}
}
case *types.Var:
for _, v := range p.doc.Vars {
for _, vn := range v.Names {
if n == vn {
return v.Doc
}
}
}
case *types.Func:
doc := func() string {
if o.Parent() == nil || (o.Parent() != nil && parent != "") {
for _, typ := range p.doc.Types {
if typ.Name != parent {
continue
}
if o.Parent() == nil {
for _, m := range typ.Methods {
if m.Name == n {
return m.Doc
}
}
} else {
for _, m := range typ.Funcs {
if m.Name == n {
return m.Doc
}
}
}
}
} else {
for _, f := range p.doc.Funcs {
if n == f.Name {
return f.Doc
}
}
}
return ""
}()
sig := o.Type().(*types.Signature)
parseFn := func(tup *types.Tuple) []string {
params := []string{}
if tup == nil {
return params
}
for i := 0; i < tup.Len(); i++ {
paramVar := tup.At(i)
paramType := p.syms.symtype(paramVar.Type()).pysig
if paramVar.Name() != "" {
paramType = fmt.Sprintf("%s %s", paramType, paramVar.Name())
}
params = append(params, paramType)
}
return params
}
params := parseFn(sig.Params())
results := parseFn(sig.Results())
paramString := strings.Join(params, ", ")
resultString := strings.Join(results, ", ")
//FIXME(sbinet): add receiver for methods?
docSig := fmt.Sprintf("%s(%s) %s", o.Name(), paramString, resultString)
if doc != "" {
doc = fmt.Sprintf("%s\n\n%s", docSig, doc)
} else {
doc = docSig
}
return doc
case *types.TypeName:
for _, t := range p.doc.Types {
if n == t.Name {
return t.Doc
}
}
default:
// TODO(sbinet)
panic(fmt.Errorf("not yet supported: %v (%T)", o, o))
}
return ""
}
func sameObj(a, b types.Object) bool {
// Because unnamed types are not canonicalized, we cannot simply compare types for
// (pointer) identity.
// Ideally we'd check equality of constant values as well, but this is good enough.
return objTag(a) == objTag(b) && types.Identical(a.Type(), b.Type())
}
func (g *cpyGen) genStructMemberSetter(cpy Struct, i int, f types.Object) {
var (
pkg = cpy.Package()
ft = f.Type()
self = newVar(pkg, cpy.GoType(), cpy.GoName(), "self", "")
ifield = newVar(pkg, ft, f.Name(), "ret", "")
cgo_fsetname = fmt.Sprintf("cgo_func_%[1]s_setter_%[2]d", cpy.sym.id, i+1)
cpy_fsetname = fmt.Sprintf("cpy_func_%[1]s_setter_%[2]d", cpy.sym.id, i+1)
)
g.decl.Printf("\n/* setter for %[1]s.%[2]s.%[3]s */\n",
pkg.Name(), cpy.sym.goname, f.Name(),
)
g.decl.Printf("static int\n")
g.decl.Printf(
"%[2]s(%[1]s *self, PyObject *value, void *closure);\n",
cpy.sym.cpyname,
cpy_fsetname,
)
g.impl.Printf("\n/* setter for %[1]s.%[2]s.%[3]s */\n",
pkg.Name(), cpy.sym.goname, f.Name(),
)
g.impl.Printf("static int\n")
g.impl.Printf(
"%[2]s(%[1]s *self, PyObject *value, void *closure) {\n",
cpy.sym.cpyname,
cpy_fsetname,
)
g.impl.Indent()
ifield.genDecl(g.impl)
g.impl.Printf("if (value == NULL) {\n")
g.impl.Indent()
g.impl.Printf(
"PyErr_SetString(PyExc_TypeError, \"cannot delete '%[1]s' attribute\");\n",
f.Name(),
)
g.impl.Printf("return -1;\n")
g.impl.Outdent()
g.impl.Printf("}\n\n")
g.impl.Printf("if (!%s) {\n", fmt.Sprintf(ifield.sym.pychk, "value"))
g.impl.Indent()
g.impl.Printf(
"PyErr_SetString(PyExc_TypeError, \"invalid type for '%[1]s' attribute\");\n",
f.Name(),
)
g.impl.Printf("return -1;\n")
g.impl.Outdent()
g.impl.Printf("}\n\n")
g.impl.Printf("if (!%[1]s(value, &c_ret)) {\n", ifield.sym.py2c)
g.impl.Indent()
g.impl.Printf("return -1;\n")
g.impl.Outdent()
g.impl.Printf("}\n\n")
g.impl.Printf("%[1]s((%[2]s)(self->cgopy), c_%[3]s);\n",
cgo_fsetname,
self.CGoType(),
ifield.Name(),
)
g.impl.Printf("return 0;\n")
g.impl.Outdent()
g.impl.Printf("}\n\n")
}
func (g *cpyGen) genStructMemberGetter(cpy Struct, i int, f types.Object) {
pkg := cpy.Package()
ft := f.Type()
var (
cgo_fgetname = fmt.Sprintf("cgo_func_%[1]s_getter_%[2]d", cpy.sym.id, i+1)
cpy_fgetname = fmt.Sprintf("cpy_func_%[1]s_getter_%[2]d", cpy.sym.id, i+1)
ifield = newVar(pkg, ft, f.Name(), "ret", "")
results = []*Var{ifield}
)
if needWrapType(ft) {
g.decl.Printf("\n/* wrapper for field %s.%s.%s */\n",
pkg.Name(),
cpy.GoName(),
f.Name(),
)
g.decl.Printf("typedef void* %[1]s_field_%d;\n", cpy.sym.cgoname, i+1)
}
g.decl.Printf("\n/* getter for %[1]s.%[2]s.%[3]s */\n",
pkg.Name(), cpy.sym.goname, f.Name(),
)
g.decl.Printf("static PyObject*\n")
g.decl.Printf(
"%[2]s(%[1]s *self, void *closure); /* %[3]s */\n",
cpy.sym.cpyname,
cpy_fgetname,
f.Name(),
)
g.impl.Printf("\n/* getter for %[1]s.%[2]s.%[3]s */\n",
pkg.Name(), cpy.sym.goname, f.Name(),
)
g.impl.Printf("static PyObject*\n")
g.impl.Printf(
"%[2]s(%[1]s *self, void *closure) /* %[3]s */ {\n",
cpy.sym.cpyname,
cpy_fgetname,
f.Name(),
)
g.impl.Indent()
g.impl.Printf("PyObject *o = NULL;\n")
ftname := g.pkg.syms.symtype(ft).cgoname
if needWrapType(ft) {
ftname = fmt.Sprintf("%[1]s_field_%d", cpy.sym.cgoname, i+1)
}
g.impl.Printf(
"%[1]s c_ret = %[2]s(self->cgopy); /*wrap*/\n",
ftname,
cgo_fgetname,
)
{
format := []string{}
funcArgs := []string{}
switch len(results) {
case 1:
ret := results[0]
ret.name = "ret"
pyfmt, pyaddrs := ret.getArgBuildValue()
format = append(format, pyfmt)
funcArgs = append(funcArgs, pyaddrs...)
default:
panic("bind: impossible")
}
g.impl.Printf("o = Py_BuildValue(%q, %s);\n",
strings.Join(format, ""),
strings.Join(funcArgs, ", "),
)
}
g.impl.Printf("return o;\n")
g.impl.Outdent()
g.impl.Printf("}\n\n")
}
// addNamedLocal creates a local variable, adds it to function f and
// returns it. Its name and type are taken from obj. Subsequent
// calls to f.lookup(obj) will return the same local.
//
func (f *Function) addNamedLocal(obj types.Object) *Alloc {
l := f.addLocal(obj.Type(), obj.Pos())
l.Comment = obj.Name()
f.objects[obj] = l
return l
}