68 lines
1.7 KiB
Go
68 lines
1.7 KiB
Go
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/*
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Copyright 2019 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package loader
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import (
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"fmt"
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"go/token"
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)
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// PositionedError represents some error with an associated position.
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// The position is tied to some external token.FileSet.
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type PositionedError struct {
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Pos token.Pos
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error
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}
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// Node is the intersection of go/ast.Node and go/types.Var.
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type Node interface {
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Pos() token.Pos // position of first character belonging to the node
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}
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// ErrFromNode returns the given error, with additional information
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// attaching it to the given AST node. It will automatically map
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// over error lists.
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func ErrFromNode(err error, node Node) error {
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if asList, isList := err.(ErrList); isList {
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resList := make(ErrList, len(asList))
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for i, baseErr := range asList {
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resList[i] = ErrFromNode(baseErr, node)
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}
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return resList
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}
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return PositionedError{
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Pos: node.Pos(),
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error: err,
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}
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}
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// MaybeErrList constructs an ErrList if the given list of
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// errors has any errors, otherwise returning nil.
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func MaybeErrList(errs []error) error {
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if len(errs) == 0 {
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return nil
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}
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return ErrList(errs)
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}
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// ErrList is a list of errors aggregated together into a single error.
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type ErrList []error
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func (l ErrList) Error() string {
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return fmt.Sprintf("%v", []error(l))
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}
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