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clippy: Fix format_args expansion parsing

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This commit is contained in:
Cameron Steffen 2021-07-16 08:54:08 -05:00
parent d9c3f0d690
commit d5e51dbf10
1 changed files with 20 additions and 15 deletions
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35
clippy_utils/src/higher.rs
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@ -485,12 +485,28 @@ impl FormatArgsExpn<'tcx> {
if let ExpnKind::Macro(_, name) = expr.span.ctxt().outer_expn_data().kind; if let ExpnKind::Macro(_, name) = expr.span.ctxt().outer_expn_data().kind;
let name = name.as_str(); let name = name.as_str();
if name.ends_with("format_args") || name.ends_with("format_args_nl"); if name.ends_with("format_args") || name.ends_with("format_args_nl");
if let ExprKind::Call(_, args) = expr.kind;
if let Some((strs_ref, args, fmt_expr)) = match args { if let ExprKind::Match(inner_match, [arm], _) = expr.kind;
// `match match`, if you will
if let ExprKind::Match(args, [inner_arm], _) = inner_match.kind;
if let ExprKind::Tup(value_args) = args.kind;
if let Some(value_args) = value_args
.iter()
.map(|e| match e.kind {
ExprKind::AddrOf(_, _, e) => Some(e),
_ => None,
})
.collect();
if let ExprKind::Array(args) = inner_arm.body.kind;
if let ExprKind::Block(Block { stmts: [], expr: Some(expr), .. }, _) = arm.body.kind;
if let ExprKind::Call(_, call_args) = expr.kind;
if let Some((strs_ref, fmt_expr)) = match call_args {
// Arguments::new_v1 // Arguments::new_v1
[strs_ref, args] => Some((strs_ref, args, None)), [strs_ref, _] => Some((strs_ref, None)),
// Arguments::new_v1_formatted // Arguments::new_v1_formatted
[strs_ref, args, fmt_expr] => Some((strs_ref, args, Some(fmt_expr))), [strs_ref, _, fmt_expr] => Some((strs_ref, Some(fmt_expr))),
_ => None, _ => None,
}; };
if let ExprKind::AddrOf(BorrowKind::Ref, _, strs_arr) = strs_ref.kind; if let ExprKind::AddrOf(BorrowKind::Ref, _, strs_arr) = strs_ref.kind;
@ -506,17 +522,6 @@ impl FormatArgsExpn<'tcx> {
None None
}) })
.collect(); .collect();
if let ExprKind::AddrOf(BorrowKind::Ref, _, args) = args.kind;
if let ExprKind::Match(args, [arm], _) = args.kind;
if let ExprKind::Tup(value_args) = args.kind;
if let Some(value_args) = value_args
.iter()
.map(|e| match e.kind {
ExprKind::AddrOf(_, _, e) => Some(e),
_ => None,
})
.collect();
if let ExprKind::Array(args) = arm.body.kind;
then { then {
Some(FormatArgsExpn { Some(FormatArgsExpn {
format_string_span: strs_ref.span, format_string_span: strs_ref.span,