cuelang.org/go@v0.10.1/encoding/toml/encode.go (about)

     1  // Copyright 2024 The CUE Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package toml
    16  
    17  import (
    18  	"io"
    19  
    20  	"github.com/pelletier/go-toml/v2"
    21  
    22  	"cuelang.org/go/cue"
    23  )
    24  
    25  // TODO(mvdan): encode options
    26  
    27  // TODO(mvdan): the encoder below is based on map[string]any since go-toml/v2/unstable
    28  // does not support printing or encoding Nodes; this means no support for comments,
    29  // positions such as empty lines, or the relative order of fields.
    30  
    31  // NewEncoder creates an encoder to stream encoded TOML bytes.
    32  func NewEncoder(w io.Writer) *Encoder {
    33  	return &Encoder{encoder: toml.NewEncoder(w)}
    34  }
    35  
    36  // Encoder implements the encoding state.
    37  type Encoder struct {
    38  	encoder *toml.Encoder
    39  }
    40  
    41  func (e *Encoder) Encode(val cue.Value) error {
    42  	var v any
    43  	if err := val.Decode(&v); err != nil {
    44  		return err
    45  	}
    46  	return e.encoder.Encode(v)
    47  }