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83 lines
2.0 KiB
Go
83 lines
2.0 KiB
Go
// Copyright 2019 Dolthub, Inc.
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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// This file incorporates work covered by the following copyright and
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// permission notice:
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//
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// Copyright 2016 Attic Labs, Inc. All rights reserved.
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// Licensed under the Apache License, version 2.0:
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// http://www.apache.org/licenses/LICENSE-2.0
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// Package d implements several debug, error and assertion functions used throughout Noms.
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package d
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import (
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"errors"
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"fmt"
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)
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// Assertion is an interface that provides convenient methods for asserting invariants.
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// Methods panic if the invariant isn't met.
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type Assertion interface {
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NoError(err error)
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True(b bool)
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}
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// Chk will panic if an assertion made on it fails
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var (
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Chk Assertion = &panicker{}
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)
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type panicker struct{}
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func (s *panicker) NoError(err error) {
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PanicIfError(err)
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}
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func (s *panicker) True(b bool) {
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PanicIfFalse(b)
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}
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// Panic creates an error using format and args and wraps it in a
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// WrappedError which can be handled using Try() and TryCatch()
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func Panic(format string, args ...interface{}) {
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if len(args) == 0 {
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err := errors.New(format)
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panic(err)
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}
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err := fmt.Errorf(format, args...)
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panic(err)
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}
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// PanicIfError panics if the err given is not nil
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func PanicIfError(err error) {
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if err != nil {
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panic(err)
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}
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}
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// PanicIfTrue panics if the bool given is true
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func PanicIfTrue(b bool) {
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if b {
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panic(errors.New("expected true"))
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}
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}
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// PanicIfFalse panics if the bool given is false
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func PanicIfFalse(b bool) {
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if !b {
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panic(errors.New("expected false"))
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}
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}
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