func formatMember(obj types.Object, maxname int) string {
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.Pkg(), obj.Type()), obj.Val().String())
case *types.Func:
fmt.Fprintf(&buf, " %s", types.TypeString(obj.Pkg(), obj.Type()))
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.Pkg(), obj.Type().Underlying()))
} else {
fmt.Fprintf(&buf, " %s", abbrev)
}
case *types.Var:
fmt.Fprintf(&buf, " %s", types.TypeString(obj.Pkg(), obj.Type()))
}
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))
}
}
// 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 *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 (g *Grapher) makeDefInfo(obj types.Object) (*DefKey, *defInfo, error) {
switch obj := obj.(type) {
case *types.Builtin:
return &DefKey{"builtin", []string{obj.Name()}}, &defInfo{pkgscope: false, exported: true}, nil
case *types.Nil:
return &DefKey{"builtin", []string{"nil"}}, &defInfo{pkgscope: false, exported: true}, nil
case *types.TypeName:
if basic, ok := obj.Type().(*types.Basic); ok {
return &DefKey{"builtin", []string{basic.Name()}}, &defInfo{pkgscope: false, exported: true}, nil
}
if obj.Name() == "error" {
return &DefKey{"builtin", []string{obj.Name()}}, &defInfo{pkgscope: false, exported: true}, nil
}
case *types.PkgName:
return &DefKey{obj.Imported().Path(), []string{}}, &defInfo{pkgscope: false, exported: true}, nil
case *types.Const:
var pkg string
if obj.Pkg() == nil {
pkg = "builtin"
} else {
pkg = obj.Pkg().Path()
}
if obj.Val().Kind() == exact.Bool && pkg == "builtin" {
return &DefKey{pkg, []string{obj.Name()}}, &defInfo{pkgscope: false, exported: true}, nil
}
}
if obj.Pkg() == nil {
// builtin
return &DefKey{"builtin", []string{obj.Name()}}, &defInfo{pkgscope: false, exported: true}, nil
}
path := g.path(obj)
// Handle the case where a dir has 2 main packages that are not
// intended to be compiled together and have overlapping def
// paths. Prefix the def path with the filename.
if obj.Pkg().Name() == "main" {
p := g.program.Fset.Position(obj.Pos())
path = append([]string{filepath.Base(p.Filename)}, path...)
}
return &DefKey{obj.Pkg().Path(), path}, &defInfo{pkgscope: g.pkgscope[obj], exported: g.exported[obj]}, nil
}