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error.go
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error.go
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// Copyright 2018 The Grafeas Authors. All rights reserved.
//
// 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 common defines types common to parsing and other diagnostics.
package common
import (
"fmt"
"strings"
)
// Error type which references a location within source and a message.
type Error struct {
Location Location
Source Source
Message string
}
// Stringer implementation that places errors in context with the source.
func (e *Error) String() string {
var result = fmt.Sprintf("ERROR: %s:%d:%d: %s",
e.Source.Description(),
e.Location.GetLine(),
e.Location.GetColumn()+1, // add one to the 0-based column for display
e.Message)
if snippet, found := e.Source.Snippet(e.Location.GetLine()); found {
result += "\n | "
result += snippet
result += "\n | "
result += strings.Repeat(".", e.Location.GetColumn())
result += "^"
}
return result
}