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// Copyright 2024 The CUE Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package errors_test
import (
"fmt"
"cuelang.org/go/cue"
"cuelang.org/go/cue/cuecontext"
"cuelang.org/go/cue/errors"
)
func Example() {
v := cuecontext.New().CompileString(`
a: string & 123
b: int & "foo"
`, cue.Filename("input.cue"))
err := v.Validate()
// [error.Error] only shows the first error encountered.
fmt.Printf("string via the Error method:\n %q\n\n", err.Error())
// [errors.Errors] allows listing all the errors encountered.
fmt.Printf("list via errors.Errors:\n")
for _, e := range errors.Errors(err) {
fmt.Printf(" * %s\n", e)
}
fmt.Printf("\n")
// [errors.Positions] lists the positions of all errors encountered.
fmt.Printf("positions via errors.Positions:\n")
for _, pos := range errors.Positions(err) {
fmt.Printf(" * %s\n", pos)
}
fmt.Printf("\n")
// [errors.Details] renders a human-friendly description of all errors like cmd/cue does.
fmt.Printf("human-friendly string via errors.Details:\n")
fmt.Println(errors.Details(err, nil))
// Output:
// string via the Error method:
// "a: conflicting values string and 123 (mismatched types string and int) (and 1 more errors)"
//
// list via errors.Errors:
// * a: conflicting values string and 123 (mismatched types string and int)
// * b: conflicting values int and "foo" (mismatched types int and string)
//
// positions via errors.Positions:
// * input.cue:2:6
// * input.cue:2:15
//
// human-friendly string via errors.Details:
// a: conflicting values string and 123 (mismatched types string and int):
// input.cue:2:6
// input.cue:2:15
// b: conflicting values int and "foo" (mismatched types int and string):
// input.cue:3:6
// input.cue:3:12
}
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