github.com/stafiprotocol/go-substrate-rpc-client@v1.4.7/types/option.go (about)

     1  // Go Substrate RPC Client (GSRPC) provides APIs and types around Polkadot and any Substrate-based chain RPC calls
     2  //
     3  // Copyright 2020 Stafi Protocol
     4  //
     5  // Licensed under the Apache License, Version 2.0 (the "License");
     6  // you may not use this file except in compliance with the License.
     7  // You may obtain a copy of the License at
     8  //
     9  //     http://www.apache.org/licenses/LICENSE-2.0
    10  //
    11  // Unless required by applicable law or agreed to in writing, software
    12  // distributed under the License is distributed on an "AS IS" BASIS,
    13  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14  // See the License for the specific language governing permissions and
    15  // limitations under the License.
    16  
    17  package types
    18  
    19  type option struct {
    20  	hasValue bool
    21  }
    22  
    23  // IsNone returns true if the value is missing
    24  func (o option) IsNone() bool {
    25  	return !o.hasValue
    26  }
    27  
    28  // IsNone returns true if a value is present
    29  func (o option) IsSome() bool {
    30  	return o.hasValue
    31  }