X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=clippy_lints%2Fsrc%2Felse_if_without_else.rs;h=b64246515f34f79fab343e868120c52060605f1e;hb=d9c3f0d69029cd9ffd97fe2d1b7a3701ea0ac51a;hp=5360b2e086ffebd3ede93bfdcc4cfa2bf25976e1;hpb=dd06c06183e634b000198958c4ba9dc6d1f0616d;p=rust.git diff --git a/clippy_lints/src/else_if_without_else.rs b/clippy_lints/src/else_if_without_else.rs index 5360b2e086f..b64246515f3 100644 --- a/clippy_lints/src/else_if_without_else.rs +++ b/clippy_lints/src/else_if_without_else.rs @@ -1,21 +1,20 @@ //! Lint on if expressions with an else if, but without a final else branch. -use rustc::lint::in_external_macro; -use rustc_lint::{EarlyContext, EarlyLintPass, LintContext}; +use clippy_utils::diagnostics::span_lint_and_help; +use rustc_ast::ast::{Expr, ExprKind}; +use rustc_lint::{EarlyContext, EarlyLintPass}; +use rustc_middle::lint::in_external_macro; use rustc_session::{declare_lint_pass, declare_tool_lint}; -use syntax::ast::*; - -use crate::utils::span_help_and_lint; declare_clippy_lint! { - /// **What it does:** Checks for usage of if expressions with an `else if` branch, + /// ### What it does + /// Checks for usage of if expressions with an `else if` branch, /// but without a final `else` branch. /// - /// **Why is this bad?** Some coding guidelines require this (e.g., MISRA-C:2004 Rule 14.10). - /// - /// **Known problems:** None. + /// ### Why is this bad? + /// Some coding guidelines require this (e.g., MISRA-C:2004 Rule 14.10). /// - /// **Example:** + /// ### Example /// ```rust /// # fn a() {} /// # fn b() {} @@ -50,17 +49,18 @@ impl EarlyLintPass for ElseIfWithoutElse { fn check_expr(&mut self, cx: &EarlyContext<'_>, mut item: &Expr) { - if in_external_macro(cx.sess(), item.span) { + if in_external_macro(cx.sess, item.span) { return; } while let ExprKind::If(_, _, Some(ref els)) = item.kind { if let ExprKind::If(_, _, None) = els.kind { - span_help_and_lint( + span_lint_and_help( cx, ELSE_IF_WITHOUT_ELSE, els.span, "`if` expression with an `else if`, but without a final `else`", + None, "add an `else` block here", ); }