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Preserve raw strs for: format!(s) to s.to_string() lint

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Ie:
|     let s = format!(r#""hello""#);
|             ^^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `r#""hello""#.to_string()`
This commit is contained in:
Sebastian Andersson 2020-10-09 20:23:03 +02:00
parent fcf22d90bb
commit 7b7ddfa55d
3 changed files with 15 additions and 4 deletions
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8
clippy_lints/src/format.rs
View file

@ -1,6 +1,6 @@
use crate::utils::paths;
use crate::utils::{
is_expn_of, is_type_diagnostic_item, last_path_segment, match_def_path, match_function_call, snippet,
is_expn_of, is_type_diagnostic_item, last_path_segment, match_def_path, match_function_call, snippet, snippet_opt,
span_lint_and_then,
};
use if_chain::if_chain;
@ -132,7 +132,11 @@ fn on_new_v1<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) -> Option<Strin
then {
// `format!("foo")` expansion contains `match () { () => [], }`
if tup.is_empty() {
return Some(format!("{:?}.to_string()", s.as_str()));
if let Some(s_src) = snippet_opt(cx, lit.span) {
// Simulate macro expansion, converting {{ and }} to { and }.
let s_expand = s_src.replace("{{", "{").replace("}}", "}");
return Some(format!("{}.to_string()", s_expand))
}
} else if s.as_str().is_empty() {
return on_argumentv1_new(cx, &tup[0], arms);
}