if_chain! {
- if let ExprKind::Block(ref block) = expr.kind;
- if block.stmts.len() == 2;
- if let StmtKind::Local(ref local) = block.stmts[0].kind;
- if let Some(ref init) = local.init;
+ if let ExprKind::Block(block, label) = expr.kind;
+ if block.stmts.len() == 3;
+ if let StmtKind::Local(local) = block.stmts[0].kind;
+ if let Some(init) = local.init;
if let ExprKind::Lit(ref lit) = init.kind;
- if let LitKind::Int(42, _) = lit.node;
+ if let LitKind::Int(42, LitIntType::Signed(IntTy::I32)) = lit.node;
if let PatKind::Binding(BindingAnnotation::Unannotated, _, name, None) = local.pat.kind;
if name.as_str() == "x";
- if let StmtKind::Semi(ref e, _) = block.stmts[1].kind
- if let ExprKind::Unary(UnOp::Neg, ref inner) = e.kind;
- if let ExprKind::Path(ref path) = inner.kind;
- if match_qpath(path, &["x"]);
+ if let StmtKind::Local(local1) = block.stmts[1].kind;
+ if let Some(init1) = local1.init;
+ if let ExprKind::Lit(ref lit1) = init1.kind;
+ if let LitKind::Float(_, LitFloatType::Suffixed(FloatTy::F32)) = lit1.node;
+ if let PatKind::Binding(BindingAnnotation::Unannotated, _, name1, None) = local1.pat.kind;
+ if name1.as_str() == "_t";
+ if let StmtKind::Semi(e) = block.stmts[2].kind;
+ if let ExprKind::Unary(UnOp::Neg, inner) = e.kind;
+ if let ExprKind::Path(ref qpath) = inner.kind;
+ if match_qpath(qpath, &["x"]);
if block.expr.is_none();
then {
// report your lint here
}
}
if_chain! {
- if let ExprKind::Block(ref block) = expr.kind;
+ if let ExprKind::Block(block, label) = expr.kind;
if block.stmts.len() == 1;
- if let StmtKind::Local(ref local) = block.stmts[0].kind;
- if let Some(ref init) = local.init;
- if let ExprKind::Call(ref func, ref args) = init.kind;
- if let ExprKind::Path(ref path) = func.kind;
- if match_qpath(path, &["String", "new"]);
+ if let StmtKind::Local(local) = block.stmts[0].kind;
+ if let Some(init) = local.init;
+ if let ExprKind::Call(func, args) = init.kind;
+ if let ExprKind::Path(ref qpath) = func.kind;
+ if match_qpath(qpath, &["String", "new"]);
if args.len() == 0;
if let PatKind::Binding(BindingAnnotation::Unannotated, _, name, None) = local.pat.kind;
if name.as_str() == "expr";
- if let Some(trailing_expr) = &block.expr;
- if let ExprKind::Call(ref func1, ref args1) = trailing_expr.kind;
- if let ExprKind::Path(ref path1) = func1.kind;
- if match_qpath(path1, &["drop"]);
+ if let Some(trailing_expr) = block.expr;
+ if let ExprKind::Call(func1, args1) = trailing_expr.kind;
+ if let ExprKind::Path(ref qpath1) = func1.kind;
+ if match_qpath(qpath1, &["drop"]);
if args1.len() == 1;
- if let ExprKind::Path(ref path2) = args1[0].kind;
- if match_qpath(path2, &["expr"]);
+ if let ExprKind::Path(ref qpath2) = args1[0].kind;
+ if match_qpath(qpath2, &["expr"]);
+ then {
+ // report your lint here
+ }
+}
+if_chain! {
+ if let ExprKind::Closure(CaptureBy::Value, fn_decl, body_id, _, None) = expr.kind;
+ if let FnRetTy::DefaultReturn(_) = fn_decl.output;
+ let body = cx.tcx.hir().body(body_id);
+ if let ExprKind::Call(func, args) = body.value.kind;
+ if let ExprKind::Path(ref qpath) = func.kind;
+ if matches!(qpath, QPath::LangItem(LangItem::FromGenerator, _));
+ if args.len() == 1;
+ if let ExprKind::Closure(CaptureBy::Value, fn_decl1, body_id1, _, Some(Movability::Static)) = args[0].kind;
+ if let FnRetTy::DefaultReturn(_) = fn_decl1.output;
+ let body1 = cx.tcx.hir().body(body_id1);
+ if let ExprKind::Block(block, label) = body1.value.kind;
+ if block.stmts.len() == 0;
+ if block.expr.is_none();
then {
// report your lint here
}