cuelang.org/go@v0.13.0/pkg/encoding/toml/manual.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  	"bytes"
    19  	"strings"
    20  
    21  	"cuelang.org/go/cue"
    22  	"cuelang.org/go/cue/ast"
    23  	"cuelang.org/go/encoding/toml"
    24  )
    25  
    26  // Marshal returns the TOML encoding of v.
    27  func Marshal(v cue.Value) (string, error) {
    28  	if err := v.Validate(cue.Concrete(true)); err != nil {
    29  		return "", err
    30  	}
    31  	var b strings.Builder
    32  	if err := toml.NewEncoder(&b).Encode(v); err != nil {
    33  		return "", err
    34  	}
    35  	return b.String(), nil
    36  }
    37  
    38  // Unmarshal parses the TOML to a CUE expression.
    39  func Unmarshal(data []byte) (ast.Expr, error) {
    40  	return toml.NewDecoder("", bytes.NewReader(data)).Decode()
    41  }
    42  
    43  // TODO(mvdan): add Validate too, but which semantics? encoding/json and encoding/yaml do not seem to agree.