errors.go

Documentation: cuelang.org/go/internal/core/compile

     1  // Copyright 2020 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 compile
    16  
    17  import (
    18  	"strings"
    19  
    20  	"cuelang.org/go/cue/ast"
    21  	"cuelang.org/go/cue/errors"
    22  	"cuelang.org/go/cue/token"
    23  )
    24  
    25  var _ errors.Error = &compilerError{}
    26  
    27  type compilerError struct {
    28  	n    ast.Node
    29  	path []string
    30  	errors.Message
    31  }
    32  
    33  func (e *compilerError) Position() token.Pos         { return e.n.Pos() }
    34  func (e *compilerError) InputPositions() []token.Pos { return nil }
    35  func (e *compilerError) Path() []string              { return e.path }
    36  func (e *compilerError) Error() string {
    37  	pos := e.n.Pos()
    38  	// Import cycles deserve special treatment.
    39  	if pos.IsValid() {
    40  		// Omit import stack. The full path to the file where the error
    41  		// is the most important thing.
    42  		return pos.String() + ": " + e.Message.Error()
    43  	}
    44  	if len(e.path) == 0 {
    45  		return e.Message.Error()
    46  	}
    47  	return strings.Join(e.path, ".") + ": " + e.Message.Error()
    48  }
    49
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