// writeSignature writes to buf the signature sig in declaration syntax.
func writeSignature(buf *bytes.Buffer, from *types.Package, name string, sig *types.Signature, params []*Parameter) {
buf.WriteString("func ")
if recv := sig.Recv(); recv != nil {
buf.WriteString("(")
if n := params[0].Name(); n != "" {
buf.WriteString(n)
buf.WriteString(" ")
}
types.WriteType(buf, from, params[0].Type())
buf.WriteString(") ")
}
buf.WriteString(name)
types.WriteSignature(buf, from, sig)
}
func changeRecv(s *types.Signature, recv *types.Var) *types.Signature {
return types.NewSignature(nil, recv, s.Params(), s.Results(), s.Variadic())
}