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// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package analysis
import "go/token"
// A Diagnostic is a message associated with a source location or range.
//
// An Analyzer may return a variety of diagnostics; the optional Category,
// which should be a constant, may be used to classify them.
// It is primarily intended to make it easy to look up documentation.
//
// All Pos values are interpreted relative to Pass.Fset. If End is
// provided, the diagnostic is specified to apply to the range between
// Pos and End.
type Diagnostic struct {
Pos token.Pos
End token.Pos // optional
Category string // optional
Message string
// URL is the optional location of a web page that provides
// additional documentation for this diagnostic.
//
// If URL is empty but a Category is specified, then the
// Analysis driver should treat the URL as "#"+Category.
//
// The URL may be relative. If so, the base URL is that of the
// Analyzer that produced the diagnostic;
// see https://pkg.go.dev/net/url#URL.ResolveReference.
URL string
// SuggestedFixes is an optional list of fixes to address the
// problem described by the diagnostic. Each one represents
// an alternative strategy; at most one may be applied.
//
// Fixes for different diagnostics should be treated as
// independent changes to the same baseline file state,
// analogous to a set of git commits all with the same parent.
// Combining fixes requires resolving any conflicts that
// arise, analogous to a git merge.
// Any conflicts that remain may be dealt with, depending on
// the tool, by discarding fixes, consulting the user, or
// aborting the operation.
SuggestedFixes []SuggestedFix
// Related contains optional secondary positions and messages
// related to the primary diagnostic.
Related []RelatedInformation
}
// RelatedInformation contains information related to a diagnostic.
// For example, a diagnostic that flags duplicated declarations of a
// variable may include one RelatedInformation per existing
// declaration.
type RelatedInformation struct {
Pos token.Pos
End token.Pos // optional
Message string
}
// A SuggestedFix is a code change associated with a Diagnostic that a
// user can choose to apply to their code. Usually the SuggestedFix is
// meant to fix the issue flagged by the diagnostic.
//
// The TextEdits must not overlap, nor contain edits for other packages.
type SuggestedFix struct {
// A verb phrase describing the fix, to be shown to
// a user trying to decide whether to accept it.
//
// Example: "Remove the surplus argument"
Message string
TextEdits []TextEdit
}
// A TextEdit represents the replacement of the code between Pos and End with the new text.
// Each TextEdit should apply to a single file. End should not be earlier in the file than Pos.
type TextEdit struct {
// For a pure insertion, End can either be set to Pos or token.NoPos.
Pos token.Pos
End token.Pos
NewText []byte
}
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