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Auto merge of #12844 - Alexendoo:to-string-in-format-args, r=dswij

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Fix `to_string_in_format_args` with macro call receiver

Fixes part of #12837

changelog: none
This commit is contained in:
bors 2024-06-07 09:52:17 +00:00
commit f990ea155e
4 changed files with 15 additions and 7 deletions
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4
clippy_lints/src/format_args.rs
View file

@ -424,14 +424,14 @@ impl<'a, 'tcx> FormatArgsExpr<'a, 'tcx> {
count_needed_derefs(receiver_ty, cx.typeck_results().expr_adjustments(receiver).iter())
&& implements_trait(cx, target, display_trait_id, &[])
&& let Some(sized_trait_id) = cx.tcx.lang_items().sized_trait()
&& let Some(receiver_snippet) = snippet_opt(cx, receiver.span)
&& let Some(receiver_snippet) = snippet_opt(cx, receiver.span.source_callsite())
{
let needs_ref = !implements_trait(cx, receiver_ty, sized_trait_id, &[]);
if n_needed_derefs == 0 && !needs_ref {
span_lint_and_sugg(
cx,
TO_STRING_IN_FORMAT_ARGS,
to_string_span.with_lo(receiver.span.hi()),
to_string_span.with_lo(receiver.span.source_callsite().hi()),
format!("`to_string` applied to a type that implements `Display` in `{name}!` args"),
"remove this",
String::new(),

1
tests/ui/format_args.fixed
View file

@ -104,6 +104,7 @@ fn main() {
println!("{foo}{bar}", foo = "foo", bar = "bar");
println!("{foo}{bar}", bar = "bar", foo = "foo");
println!("{foo}{bar}", bar = "bar", foo = "foo");
println!("{}", my_other_macro!());
// negative tests
println!("error: something failed at {}", Somewhere.to_string());

1
tests/ui/format_args.rs
View file

@ -104,6 +104,7 @@ fn main() {
println!("{foo}{bar}", foo = "foo", bar = "bar".to_string());
println!("{foo}{bar}", bar = "bar".to_string(), foo = "foo");
println!("{foo}{bar}", bar = "bar", foo = "foo".to_string());
println!("{}", my_other_macro!().to_string());
// negative tests
println!("error: something failed at {}", Somewhere.to_string());

16
tests/ui/format_args.stderr
View file

@ -127,29 +127,35 @@ error: `to_string` applied to a type that implements `Display` in `println!` arg
LL | println!("{foo}{bar}", bar = "bar", foo = "foo".to_string());
| ^^^^^^^^^^^^ help: remove this
error: `to_string` applied to a type that implements `Display` in `println!` args
--> tests/ui/format_args.rs:107:37
|
LL | println!("{}", my_other_macro!().to_string());
| ^^^^^^^^^^^^ help: remove this
error: `to_string` applied to a type that implements `Display` in `print!` args
--> tests/ui/format_args.rs:118:37
--> tests/ui/format_args.rs:119:37
|
LL | print!("{}", (Location::caller().to_string()));
| ^^^^^^^^^^^^ help: remove this
error: `to_string` applied to a type that implements `Display` in `print!` args
--> tests/ui/format_args.rs:119:39
--> tests/ui/format_args.rs:120:39
|
LL | print!("{}", ((Location::caller()).to_string()));
| ^^^^^^^^^^^^ help: remove this
error: `to_string` applied to a type that implements `Display` in `format!` args
--> tests/ui/format_args.rs:147:38
--> tests/ui/format_args.rs:148:38
|
LL | let x = format!("{} {}", a, b.to_string());
| ^^^^^^^^^^^^ help: remove this
error: `to_string` applied to a type that implements `Display` in `println!` args
--> tests/ui/format_args.rs:161:24
--> tests/ui/format_args.rs:162:24
|
LL | println!("{}", original[..10].to_string());
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use this: `&original[..10]`
error: aborting due to 25 previous errors
error: aborting due to 26 previous errors