"appends":          true,
	"asmdecl":          true,
	"assign":           true,
	"atomic":           true,
	"bool":             true,
	"bools":            true,
	"buildtag":         true,
	"buildtags":        true,
	"cgocall":          true,
	"composites":       true,
	"copylocks":        true,
	"defers":           true,
	"directive":        true,
	"errorsas":         true,

var curves = []struct {
	P         string
	Element   string
	Params    *elliptic.CurveParams
	BuildTags string
}{
	{
		P:       "P224",
		Element: "fiat.P224Element",
		Params:  elliptic.P224().Params(),
	},
	{
		P:         "P256",
		Element:   "fiat.P256Element",
		Params:    elliptic.P256().Params(),
		BuildTags: "(!amd64 && !arm64 && !ppc64le && !s390x) || purego",
	},
	{
		P:       "P384",

		for GOARCH := range allGOARCH {
			context := build.Context{
				GOOS:      "linux", // darwin has custom assembly
				GOARCH:    GOARCH,
				GOROOT:    testenv.GOROOT(t),
				Compiler:  build.Default.Compiler,
				BuildTags: []string{"purego", "math_big_pure_go"},
			}

			pkg, err := context.Import(pkgName, "", 0)
			if err != nil {
				t.Fatal(err)
			}
			if len(pkg.SFiles) == 0 {
				continue
			}

	// Clients creating a new context may customize BuildTags, which
	// defaults to empty, but it is usually an error to customize ToolTags or ReleaseTags.
	// ToolTags defaults to build tags appropriate to the current Go toolchain configuration.
	// ReleaseTags defaults to the list of Go releases the current release is compatible with.
	// BuildTags is not set for the Default build Context.
	// In addition to the BuildTags, ToolTags, and ReleaseTags, build constraints

	if generateSkipFlag != "" {
		var err error
		generateSkipRE, err = regexp.Compile(generateSkipFlag)
		if err != nil {
			log.Fatalf("generate: %s", err)
		}
	}

	cfg.BuildContext.BuildTags = append(cfg.BuildContext.BuildTags, "generate")

	// Even if the arguments are .go files, this loop suffices.
	printed := false
	pkgOpts := load.PackageOpts{IgnoreImports: true}

	// Clients creating a new context may customize BuildTags, which
	// defaults to empty, but it is usually an error to customize ToolTags or ReleaseTags.
	// ToolTags defaults to build tags appropriate to the current Go toolchain configuration.
	// ReleaseTags defaults to the list of Go releases the current release is compatible with.
	// BuildTags is not set for the Default build Context.
	// In addition to the BuildTags, ToolTags, and ReleaseTags, build constraints

// vetLegacyFlags maps flags used by legacy vet to their corresponding
// new names. The old names will continue to work.
var vetLegacyFlags = map[string]string{
	// Analyzer name changes
	"bool":       "bools",
	"buildtags":  "buildtag",
	"methods":    "stdmethods",
	"rangeloops": "loopclosure",

	// Analyzer flags
	"compositewhitelist":  "composites.whitelist",
	"printfuncs":          "printf.funcs",

source files that are not part of this package with the current build
configuration but may be part of other build configurations.
The contents of these files may be read using Pass.ReadFile;
see the "asmdecl" or "buildtags" analyzers for examples of loading
non-Go files and reporting diagnostics against them.

The ResultOf field provides the results computed by the analyzers

        UseAllFiles   bool     // use files regardless of //go:build lines, file names
        Compiler      string   // compiler to assume when computing target paths
        BuildTags     []string // build constraints to match in //go:build lines
        ToolTags      []string // toolchain-specific build constraints
        ReleaseTags   []string // releases the current release is compatible with

	"strings"
)

func init() {
	register(buildtagFix)
}

const buildtagGoVersionCutoff = "go1.18"

var buildtagFix = fix{
	name: "buildtag",
	date: "2021-08-25",
	f:    buildtag,
	desc: `Remove +build comments from modules using Go 1.18 or later`,
}

func buildtag(f *ast.File) bool {
	if version.Compare(*goVersion, buildtagGoVersionCutoff) < 0 {
		return false
	}