mirror of
https://github.com/mgechev/revive.git
synced 2024-11-24 08:32:22 +02:00
149 lines
2.9 KiB
Go
149 lines
2.9 KiB
Go
package rule
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import (
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"fmt"
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"go/ast"
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"go/token"
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"go/types"
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"regexp"
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"strings"
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"github.com/mgechev/revive/lint"
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)
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const styleGuideBase = "https://golang.org/wiki/CodeReviewComments"
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// isBlank returns whether id is the blank identifier "_".
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// If id == nil, the answer is false.
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func isBlank(id *ast.Ident) bool { return id != nil && id.Name == "_" }
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func isTest(f *lint.File) bool {
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return strings.HasSuffix(f.Name, "_test.go")
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}
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var commonMethods = map[string]bool{
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"Error": true,
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"Read": true,
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"ServeHTTP": true,
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"String": true,
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"Write": true,
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}
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func receiverType(fn *ast.FuncDecl) string {
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switch e := fn.Recv.List[0].Type.(type) {
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case *ast.Ident:
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return e.Name
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case *ast.StarExpr:
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if id, ok := e.X.(*ast.Ident); ok {
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return id.Name
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}
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}
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// The parser accepts much more than just the legal forms.
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return "invalid-type"
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}
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var knownNameExceptions = map[string]bool{
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"LastInsertId": true, // must match database/sql
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"kWh": true,
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}
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func isCgoExported(f *ast.FuncDecl) bool {
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if f.Recv != nil || f.Doc == nil {
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return false
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}
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cgoExport := regexp.MustCompile(fmt.Sprintf("(?m)^//export %s$", regexp.QuoteMeta(f.Name.Name)))
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for _, c := range f.Doc.List {
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if cgoExport.MatchString(c.Text) {
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return true
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}
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}
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return false
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}
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var commonInitialisms = map[string]bool{
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"ACL": true,
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"API": true,
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"ASCII": true,
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"CPU": true,
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"CSS": true,
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"DNS": true,
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"EOF": true,
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"GUID": true,
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"HTML": true,
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"HTTP": true,
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"HTTPS": true,
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"ID": true,
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"IP": true,
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"JSON": true,
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"LHS": true,
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"QPS": true,
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"RAM": true,
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"RHS": true,
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"RPC": true,
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"SLA": true,
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"SMTP": true,
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"SQL": true,
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"SSH": true,
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"TCP": true,
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"TLS": true,
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"TTL": true,
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"UDP": true,
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"UI": true,
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"UID": true,
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"UUID": true,
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"URI": true,
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"URL": true,
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"UTF8": true,
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"VM": true,
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"XML": true,
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"XMPP": true,
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"XSRF": true,
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"XSS": true,
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}
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var allCapsRE = regexp.MustCompile(`^[A-Z0-9_]+$`)
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func isIdent(expr ast.Expr, ident string) bool {
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id, ok := expr.(*ast.Ident)
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return ok && id.Name == ident
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}
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var zeroLiteral = map[string]bool{
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"false": true, // bool
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// runes
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`'\x00'`: true,
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`'\000'`: true,
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// strings
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`""`: true,
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"``": true,
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// numerics
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"0": true,
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"0.": true,
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"0.0": true,
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"0i": true,
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}
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func validType(T types.Type) bool {
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return T != nil &&
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T != types.Typ[types.Invalid] &&
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!strings.Contains(T.String(), "invalid type") // good but not foolproof
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}
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func isPkgDot(expr ast.Expr, pkg, name string) bool {
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sel, ok := expr.(*ast.SelectorExpr)
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return ok && isIdent(sel.X, pkg) && isIdent(sel.Sel, name)
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}
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func srcLine(src []byte, p token.Position) string {
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// Run to end of line in both directions if not at line start/end.
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lo, hi := p.Offset, p.Offset+1
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for lo > 0 && src[lo-1] != '\n' {
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lo--
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}
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for hi < len(src) && src[hi-1] != '\n' {
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hi++
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}
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return string(src[lo:hi])
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}
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