mikros/rust
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Don't lint suspicious_else_formatting inside proc-macros

Browse Source
This commit is contained in:
Jason Newcomb 2021-09-23 00:22:27 -04:00
parent 848e5518d6
commit 5efd6bc6c3
No known key found for this signature in database
GPG Key ID: DA59E8643A37ED06
1 changed files with 31 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

57
clippy_lints/src/formatting.rs
View File

@ -286,34 +286,39 @@ fn check_array(cx: &EarlyContext<'_>, expr: &Expr) {
}
fn check_missing_else(cx: &EarlyContext<'_>, first: &Expr, second: &Expr) {
if !differing_macro_contexts(first.span, second.span)
&& !first.span.from_expansion()
&& is_if(first)
&& (is_block(second) || is_if(second))
{
// where the else would be
if_chain! {
if !differing_macro_contexts(first.span, second.span);
if !first.span.from_expansion();
if let ExprKind::If(cond_expr, ..) = &first.kind;
if is_block(second) || is_if(second);
// Proc-macros can give weird spans. Make sure this is actually an `if`.
if let Some(if_snip) = snippet_opt(cx, first.span.until(cond_expr.span));
if if_snip.starts_with("if");
// If there is a line break between the two expressions, don't lint.
// If there is a non-whitespace character, this span came from a proc-macro.
let else_span = first.span.between(second.span);
if let Some(else_snippet) = snippet_opt(cx, else_span);
if !else_snippet.chars().any(|c| c == '\n' || !c.is_whitespace());
then {
let (looks_like, next_thing) = if is_if(second) {
("an `else if`", "the second `if`")
} else {
("an `else {..}`", "the next block")
};
if let Some(else_snippet) = snippet_opt(cx, else_span) {
if !else_snippet.contains('\n') {
let (looks_like, next_thing) = if is_if(second) {
("an `else if`", "the second `if`")
} else {
("an `else {..}`", "the next block")
};
span_lint_and_note(
cx,
SUSPICIOUS_ELSE_FORMATTING,
else_span,
&format!("this looks like {} but the `else` is missing", looks_like),
None,
&format!(
"to remove this lint, add the missing `else` or add a new line before {}",
next_thing,
),
);
}
span_lint_and_note(
cx,
SUSPICIOUS_ELSE_FORMATTING,
else_span,
&format!("this looks like {} but the `else` is missing", looks_like),
None,
&format!(
"to remove this lint, add the missing `else` or add a new line before {}",
next_thing,
),
);
}
}
}