use crate::utils::{is_allowed, snippet, span_lint_and_sugg};
+use rustc_ast::ast::LitKind;
use rustc_errors::Applicability;
-use rustc_hir::*;
+use rustc_hir::{Expr, ExprKind, HirId};
use rustc_lint::{LateContext, LateLintPass};
use rustc_session::{declare_lint_pass, declare_tool_lint};
use rustc_span::source_map::Span;
-use syntax::ast::LitKind;
use unicode_normalization::UnicodeNormalization;
declare_clippy_lint! {
- /// **What it does:** Checks for the Unicode zero-width space in the code.
+ /// **What it does:** Checks for invisible Unicode characters in the code.
///
/// **Why is this bad?** Having an invisible character in the code makes for all
/// sorts of April fools, but otherwise is very much frowned upon.
///
/// **Known problems:** None.
///
- /// **Example:** You don't see it, but there may be a zero-width space
- /// somewhere in this text.
- pub ZERO_WIDTH_SPACE,
+ /// **Example:** You don't see it, but there may be a zero-width space or soft hyphen
+ /// somewhere in this text.
+ pub INVISIBLE_CHARACTERS,
correctness,
- "using a zero-width space in a string literal, which is confusing"
+ "using an invisible character in a string literal, which is confusing"
}
declare_clippy_lint! {
"using a Unicode literal not in NFC normal form (see [Unicode tr15](http://www.unicode.org/reports/tr15/) for further information)"
}
-declare_lint_pass!(Unicode => [ZERO_WIDTH_SPACE, NON_ASCII_LITERAL, UNICODE_NOT_NFC]);
+declare_lint_pass!(Unicode => [INVISIBLE_CHARACTERS, NON_ASCII_LITERAL, UNICODE_NOT_NFC]);
-impl LateLintPass<'_, '_> for Unicode {
- fn check_expr(&mut self, cx: &LateContext<'_, '_>, expr: &'_ Expr<'_>) {
+impl LateLintPass<'_> for Unicode {
+ fn check_expr(&mut self, cx: &LateContext<'_>, expr: &'_ Expr<'_>) {
if let ExprKind::Lit(ref lit) = expr.kind {
if let LitKind::Str(_, _) = lit.node {
check_str(cx, lit.span, expr.hir_id)
result
}
-fn check_str(cx: &LateContext<'_, '_>, span: Span, id: HirId) {
+fn check_str(cx: &LateContext<'_>, span: Span, id: HirId) {
let string = snippet(cx, span, "");
- if string.contains('\u{200B}') {
+ if string.chars().any(|c| ['\u{200B}', '\u{ad}', '\u{2060}'].contains(&c)) {
span_lint_and_sugg(
cx,
- ZERO_WIDTH_SPACE,
+ INVISIBLE_CHARACTERS,
span,
- "zero-width space detected",
+ "invisible character detected",
"consider replacing the string with",
- string.replace("\u{200B}", "\\u{200B}"),
+ string
+ .replace("\u{200B}", "\\u{200B}")
+ .replace("\u{ad}", "\\u{AD}")
+ .replace("\u{2060}", "\\u{2060}"),
Applicability::MachineApplicable,
);
}