(*ast.File)(nil),
		(*ast.Ident)(nil),
	}
	var fileVersion string // "" => no check
	inspect.Preorder(nodeFilter, func(n ast.Node) {
		switch n := n.(type) {
		case *ast.File:
			if isGenerated(n) {
				// Suppress diagnostics in generated files (such as cgo).
				fileVersion = ""
			} else {
				fileVersion = versions.Lang(versions.FileVersion(pass.TypesInfo, n))
				// (may be "" if unknown)
			}

func (check *Checker) allowVersion(at poser, v goVersion) bool {
	fileVersion := check.conf.GoVersion
	if pos := at.Pos(); pos.IsKnown() {
		fileVersion = check.versions[pos.FileBase()]
	}

	// We need asGoVersion (which calls version.Lang) below
	// because fileVersion may be the (unaltered) Config.GoVersion
	// string which may contain dot-release information.
	version := asGoVersion(fileVersion)

	return !version.isValid() || version.cmp(v) >= 0
}

package versions

import (
	"go/ast"
	"go/types"
)

// FileVersion returns a file's Go version.
// The reported version is an unknown Future version if a
// version cannot be determined.
func FileVersion(info *types.Info, file *ast.File) string {
	// In tools built with Go >= 1.22, the Go version of a file
	// follow a cascades of sources:
	// 1) types.Info.FileVersion, which follows the cascade:
	//   1.a) file version (ast.File.GoVersion),