// filterFieldList removes unexported fields (field names) from the field list
// in place and returns true if fields were removed. Anonymous fields are
// recorded with the parent type. filterType is called with the types of
// all remaining fields.
//
func (r *reader) filterFieldList(parent *namedType, fields *ast.FieldList) (removedFields bool) {
if fields == nil {
return
}
list := fields.List
j := 0
for _, field := range list {
keepField := false
if n := len(field.Names); n == 0 {
// anonymous field
name := r.recordAnonymousField(parent, field.Type)
if ast.IsExported(name) {
keepField = true
}
} else {
field.Names = filterIdentList(field.Names)
if len(field.Names) < n {
removedFields = true
}
if len(field.Names) > 0 {
keepField = true
}
}
if keepField {
r.filterType(nil, field.Type)
list[j] = field
j++
}
}
if j < len(list) {
removedFields = true
}
fields.List = list[0:j]
return
}
func (p *parser) parseParams(n *parse.Node, scope *ast.Scope) *ast.FieldList {
fieldList := ast.FieldList{
Opening: token.Pos(n.Child(0).Pos()),
Closing: token.Pos(n.LastChild().Pos()),
}
if n.Child(1).Is(parameterList) {
eachListItem(parameterDecl, n.Child(1), func(item *parse.Node) {
fieldList.List = append(fieldList.List, p.parseParamDecl(item, scope))
})
}
return &fieldList
}
// removeFieldNames removes names from the FieldList in place.
// This is used to remove names from return values
func removeFieldNames(fl *ast.FieldList) {
l := []*ast.Field{}
for _, f := range fl.List {
if f.Names == nil {
l = append(l, f)
} else {
for range f.Names {
nf := *f
nf.Names = nil
l = append(l, &nf)
}
}
}
fl.List = l
}
func (p *parser) parseInterfaceType(n *parse.Node) ast.Expr {
keywordPos := token.Pos(n.Child(0).Pos())
n = n.Child(1)
specs := ast.FieldList{
Opening: token.Pos(n.Child(0).Pos()),
Closing: token.Pos(n.LastChild().Pos()),
}
if n.ChildCount() > 2 {
eachListItem(methodSpec, n.Child(1), func(item *parse.Node) {
specs.List = append(specs.List, p.parseMethodSpec(item))
})
}
return &ast.InterfaceType{
Interface: keywordPos,
Methods: &specs,
}
}
// filterFieldList removes unexported fields (field names) from the field list
// in place and returns true if fields were removed. Removed fields that are
// anonymous (embedded) fields are added as embedded types to base. filterType
// is called with the types of all remaining fields.
//
func (r *reader) filterFieldList(base *baseType, fields *ast.FieldList) (removedFields bool) {
if fields == nil {
return
}
list := fields.List
j := 0
for _, field := range list {
keepField := false
if n := len(field.Names); n == 0 {
// anonymous field
name, imp := baseTypeName(field.Type)
if ast.IsExported(name) {
// we keep the field - in this case r.readDecl
// will take care of adding the embedded type
keepField = true
} else if base != nil && !imp {
// we don't keep the field - add it as an embedded
// type so we won't loose its methods, if any
if embedded := r.lookupType(name); embedded != nil {
_, ptr := field.Type.(*ast.StarExpr)
base.addEmbeddedType(embedded, ptr)
}
}
} else {
field.Names = filterIdentList(field.Names)
if len(field.Names) < n {
removedFields = true
}
if len(field.Names) > 0 {
keepField = true
}
}
if keepField {
r.filterType(nil, field.Type)
list[j] = field
j++
}
}
if j < len(list) {
removedFields = true
}
fields.List = list[0:j]
return
}
// filterFieldList removes unexported fields (field names) from the field list
// in place and returns true if fields were removed. Anonymous fields are
// recorded with the parent type. filterType is called with the types of
// all remaining fields.
//
func (r *reader) filterFieldList(parent *namedType, fields *ast.FieldList, ityp *ast.InterfaceType) (removedFields bool) {
if fields == nil {
return
}
list := fields.List
j := 0
for _, field := range list {
keepField := false
if n := len(field.Names); n == 0 {
// anonymous field
fname := r.recordAnonymousField(parent, field.Type)
if ast.IsExported(fname) {
keepField = true
} else if ityp != nil && fname == "error" {
// possibly the predeclared error interface; keep
// it for now but remember this interface so that
// it can be fixed if error is also defined locally
keepField = true
r.remember(ityp)
}
} else {
field.Names = filterIdentList(field.Names, false)
if len(field.Names) < n {
removedFields = true
}
if len(field.Names) > 0 {
keepField = true
}
}
if keepField {
r.filterType(nil, field.Type)
list[j] = field
j++
}
}
if j < len(list) {
removedFields = true
}
fields.List = list[0:j]
return
}
// Struct creates a struct{} expression. The arguments are a series
// of name/type/tag tuples. Name must be of type *ast.Ident, type
// must be of type ast.Expr, and tag must be of type *ast.BasicLit,
// The number of arguments must be a multiple of 3, or a run-time
// panic will occur.
func Struct(args ...ast.Expr) *ast.StructType {
fields := new(ast.FieldList)
if len(args)%3 != 0 {
panic("Number of args to FieldList must be a multiple of 3, got " + strconv.Itoa(len(args)))
}
for i := 0; i < len(args); i += 3 {
var field ast.Field
name, typ, tag := args[i], args[i+1], args[i+2]
if name != nil {
field.Names = []*ast.Ident{name.(*ast.Ident)}
}
if typ != nil {
field.Type = typ
}
if tag != nil {
field.Tag = tag.(*ast.BasicLit)
}
fields.List = append(fields.List, &field)
}
return &ast.StructType{Fields: fields}
}
