Rollup merge of #104901 - krtab:filetype_compare, r=the8472

[rust.git] / src / tools / clippy / clippy_lints / src / unused_rounding.rs

diff --git a/src/tools/clippy/clippy_lints/src/unused_rounding.rs b/src/tools/clippy/clippy_lints/src/unused_rounding.rs
index aac6719a8dc0feef10b0ea7c4f1578f8732195ca..097568cd1f70037921ee4f5c6b2bc601a8aacee5 100644 (file)
--- a/src/tools/clippy/clippy_lints/src/unused_rounding.rs
+++ b/src/tools/clippy/clippy_lints/src/unused_rounding.rs
@@ -1,4 +1,5 @@
 use clippy_utils::diagnostics::span_lint_and_sugg;
+use clippy_utils::source::snippet;
 use rustc_ast::ast::{Expr, ExprKind, MethodCall};
 use rustc_errors::Applicability;
 use rustc_lint::{EarlyContext, EarlyLintPass};
@@ -29,22 +30,16 @@
 }
 declare_lint_pass!(UnusedRounding => [UNUSED_ROUNDING]);
 
-fn is_useless_rounding(expr: &Expr) -> Option<(&str, String)> {
+fn is_useless_rounding<'a>(cx: &EarlyContext<'_>, expr: &'a Expr) -> Option<(&'a str, String)> {
     if let ExprKind::MethodCall(box MethodCall { seg:name_ident, receiver, .. }) = &expr.kind
         && let method_name = name_ident.ident.name.as_str()
         && (method_name == "ceil" || method_name == "round" || method_name == "floor")
         && let ExprKind::Lit(token_lit) = &receiver.kind
-        && token_lit.is_semantic_float() {
-            let mut f_str = token_lit.symbol.to_string();
-            let f = f_str.trim_end_matches('_').parse::<f64>().unwrap();
-            if let Some(suffix) = token_lit.suffix {
-                f_str.push_str(suffix.as_str());
-            }
-            if f.fract() == 0.0 {
-                Some((method_name, f_str))
-            } else {
-                None
-            }
+        && token_lit.is_semantic_float()
+        && let Ok(f) = token_lit.symbol.as_str().replace('_', "").parse::<f64>() {
+            (f.fract() == 0.0).then(||
+                (method_name, snippet(cx, receiver.span, "..").to_string())
+            )
         } else {
             None
         }
@@ -52,7 +47,7 @@ fn is_useless_rounding(expr: &Expr) -> Option<(&str, String)> {
 
 impl EarlyLintPass for UnusedRounding {
     fn check_expr(&mut self, cx: &EarlyContext<'_>, expr: &Expr) {
-        if let Some((method_name, float)) = is_useless_rounding(expr) {
+        if let Some((method_name, float)) = is_useless_rounding(cx, expr) {
             span_lint_and_sugg(
                 cx,
                 UNUSED_ROUNDING,