More uses of higher::if_block

clippy_lints/src/block_in_if_condition.rs

@@ -72,7 +72,7 @@ const COMPLEX_BLOCK_MESSAGE: &str = "in an 'if' condition, avoid complex blocks
 
 impl<'a, 'tcx> LateLintPass<'a, 'tcx> for BlockInIfCondition {
     fn check_expr(&mut self, cx: &LateContext<'a, 'tcx>, expr: &'tcx Expr) {
-        if let ExprKind::If(check, then, _) = &expr.node {
+        if let Some((check, then, _)) = higher::if_block(&expr) {
             if let ExprKind::Block(block, _) = &check.node {
                 if block.rules == DefaultBlock {
                     if block.stmts.is_empty() {

clippy_lints/src/copies.rs

@@ -1,4 +1,4 @@
-use crate::utils::{get_parent_expr, in_macro, snippet, span_lint_and_then, span_note_and_lint};
+use crate::utils::{get_parent_expr, higher, in_macro, snippet, span_lint_and_then, span_note_and_lint};
 use crate::utils::{SpanlessEq, SpanlessHash};
 use rustc::hir::*;
 use rustc::lint::{LateContext, LateLintPass, LintArray, LintPass};
@@ -109,13 +109,11 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for CopyAndPaste {
     fn check_expr(&mut self, cx: &LateContext<'a, 'tcx>, expr: &'tcx Expr) {
         if !in_macro(expr.span) {
             // skip ifs directly in else, it will be checked in the parent if
-            if let Some(&Expr {
+            if let Some(expr) = get_parent_expr(cx, expr) {
-                node: ExprKind::If(_, _, Some(ref else_expr)),
+                if let Some((_, _, Some(ref else_expr))) = higher::if_block(&expr) {
-                ..
+                    if else_expr.hir_id == expr.hir_id {
-            }) = get_parent_expr(cx, expr)
+                        return;
-            {
+                    }
-                if else_expr.hir_id == expr.hir_id {
-                    return;
                 }
             }
 
@@ -236,7 +234,7 @@ fn if_sequence(mut expr: &Expr) -> (SmallVec<[&Expr; 1]>, SmallVec<[&Block; 1]>)
     let mut conds = SmallVec::new();
     let mut blocks: SmallVec<[&Block; 1]> = SmallVec::new();
 
-    while let ExprKind::If(ref cond, ref then_expr, ref else_expr) = expr.node {
+    while let Some((ref cond, ref then_expr, ref else_expr)) = higher::if_block(&expr) {
         conds.push(&**cond);
         if let ExprKind::Block(ref block, _) = then_expr.node {
             blocks.push(block);

clippy_lints/src/entry.rs

@@ -1,5 +1,5 @@
 use crate::utils::SpanlessEq;
-use crate::utils::{get_item_name, match_type, paths, snippet, span_lint_and_then, walk_ptrs_ty};
+use crate::utils::{get_item_name, higher, match_type, paths, snippet, span_lint_and_then, walk_ptrs_ty};
 use if_chain::if_chain;
 use rustc::hir::intravisit::{walk_expr, NestedVisitorMap, Visitor};
 use rustc::hir::*;
@@ -41,7 +41,7 @@ declare_lint_pass!(HashMapPass => [MAP_ENTRY]);
 
 impl<'a, 'tcx> LateLintPass<'a, 'tcx> for HashMapPass {
     fn check_expr(&mut self, cx: &LateContext<'a, 'tcx>, expr: &'tcx Expr) {
-        if let ExprKind::If(ref check, ref then_block, ref else_block) = expr.node {
+        if let Some((ref check, ref then_block, ref else_block)) = higher::if_block(&expr) {
             if let ExprKind::Unary(UnOp::UnNot, ref check) = check.node {
                 if let Some((ty, map, key)) = check_cond(cx, check) {
                     // in case of `if !m.contains_key(&k) { m.insert(k, v); }`

clippy_lints/src/let_if_seq.rs

@@ -1,4 +1,4 @@
-use crate::utils::{snippet, span_lint_and_then};
+use crate::utils::{higher, snippet, span_lint_and_then};
 use if_chain::if_chain;
 use rustc::hir;
 use rustc::hir::def::Res;
@@ -63,7 +63,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for LetIfSeq {
                 if let hir::StmtKind::Local(ref local) = stmt.node;
                 if let hir::PatKind::Binding(mode, canonical_id, ident, None) = local.pat.node;
                 if let hir::StmtKind::Expr(ref if_) = expr.node;
-                if let hir::ExprKind::If(ref cond, ref then, ref else_) = if_.node;
+                if let Some((ref cond, ref then, ref else_)) = higher::if_block(&if_);
                 if !used_in_expr(cx, canonical_id, cond);
                 if let hir::ExprKind::Block(ref then, _) = then.node;
                 if let Some(value) = check_assign(cx, canonical_id, &*then);