Rustup to ea0dc92

Author: mcarton

clippy_lints/src/booleans.rs

@@ -3,6 +3,7 @@ use rustc::hir::*;
 use rustc::hir::intravisit::*;
 use syntax::ast::{LitKind, DUMMY_NODE_ID};
 use syntax::codemap::{DUMMY_SP, dummy_spanned};
+use syntax::util::ThinVec;
 use utils::{span_lint_and_then, in_macro, snippet_opt, SpanlessEq};
 
 /// **What it does:** This lint checks for boolean expressions that can be written more concisely
@@ -99,7 +100,7 @@ impl<'a, 'tcx, 'v> Hir2Qmm<'a, 'tcx, 'v> {
                         Expr {
                             id: DUMMY_NODE_ID,
                             span: DUMMY_SP,
-                            attrs: None,
+                            attrs: ThinVec::new(),
                             node: ExprBinary(dummy_spanned(op), lhs.clone(), rhs.clone()),
                         }
                     };

clippy_lints/src/formatting.rs

@@ -59,21 +59,13 @@ impl EarlyLintPass for Formatting {
     fn check_block(&mut self, cx: &EarlyContext, block: &ast::Block) {
         for w in block.stmts.windows(2) {
             match (&w[0].node, &w[1].node) {
-                (&ast::StmtKind::Expr(ref first, _), &ast::StmtKind::Expr(ref second, _)) |
-                (&ast::StmtKind::Expr(ref first, _), &ast::StmtKind::Semi(ref second, _)) => {
+                (&ast::StmtKind::Expr(ref first), &ast::StmtKind::Expr(ref second)) |
+                (&ast::StmtKind::Expr(ref first), &ast::StmtKind::Semi(ref second)) => {
                     check_consecutive_ifs(cx, first, second);
                 }
                 _ => (),
             }
         }
-
-        if let Some(ref expr) = block.expr {
-            if let Some(ref stmt) = block.stmts.iter().last() {
-                if let ast::StmtKind::Expr(ref first, _) = stmt.node {
-                    check_consecutive_ifs(cx, first, expr);
-                }
-            }
-        }
     }
 
     fn check_expr(&mut self, cx: &EarlyContext, expr: &ast::Expr) {

clippy_lints/src/items_after_statements.rs

@@ -2,7 +2,7 @@
 
 use rustc::lint::*;
 use syntax::ast::*;
-use utils::in_macro;
+use utils::{in_macro, span_lint};
 
 /// **What it does:** This lints checks for items declared after some statement in a block
 ///
@@ -44,26 +44,23 @@ impl EarlyLintPass for ItemsAfterStatements {
         if in_macro(cx, item.span) {
             return;
         }
-        let mut stmts = item.stmts.iter().map(|stmt| &stmt.node);
+
         // skip initial items
-        while let Some(&StmtKind::Decl(ref decl, _)) = stmts.next() {
-            if let DeclKind::Local(_) = decl.node {
-                break;
-            }
-        }
+        let stmts = item.stmts.iter()
+                              .map(|stmt| &stmt.node)
+                              .skip_while(|s| matches!(**s, StmtKind::Item(..)));
+
         // lint on all further items
         for stmt in stmts {
-            if let StmtKind::Decl(ref decl, _) = *stmt {
-                if let DeclKind::Item(ref it) = decl.node {
-                    if in_macro(cx, it.span) {
-                        return;
-                    }
-                    cx.struct_span_lint(ITEMS_AFTER_STATEMENTS,
-                                        it.span,
-                                        "adding items after statements is confusing, since items exist from the \
-                                         start of the scope")
-                      .emit();
+            if let StmtKind::Item(ref it) = *stmt {
+                if in_macro(cx, it.span) {
+                    return;
                 }
+                span_lint(cx,
+                          ITEMS_AFTER_STATEMENTS,
+                          it.span,
+                          "adding items after statements is confusing, since items exist from the \
+                           start of the scope");
             }
         }
     }

clippy_lints/src/misc_early.rs

@@ -171,15 +171,14 @@ impl EarlyLintPass for MiscEarly {
     fn check_block(&mut self, cx: &EarlyContext, block: &Block) {
         for w in block.stmts.windows(2) {
             if_let_chain! {[
-                let StmtKind::Decl(ref first, _) = w[0].node,
-                let DeclKind::Local(ref local) = first.node,
+                let StmtKind::Local(ref local) = w[0].node,
                 let Option::Some(ref t) = local.init,
-                let ExprKind::Closure(_,_,_,_) = t.node,
-                let PatKind::Ident(_,sp_ident,_) = local.pat.node,
-                let StmtKind::Semi(ref second,_) = w[1].node,
-                let ExprKind::Assign(_,ref call) = second.node,
-                let ExprKind::Call(ref closure,_) = call.node,
-                let ExprKind::Path(_,ref path) = closure.node
+                let ExprKind::Closure(_, _, _, _) = t.node,
+                let PatKind::Ident(_, sp_ident, _) = local.pat.node,
+                let StmtKind::Semi(ref second) = w[1].node,
+                let ExprKind::Assign(_, ref call) = second.node,
+                let ExprKind::Call(ref closure, _) = call.node,
+                let ExprKind::Path(_, ref path) = closure.node
             ], {
                 if sp_ident.node == (&path.segments[0]).identifier {
                     span_lint(cx, REDUNDANT_CLOSURE_CALL, second.span, "Closure called just once immediately after it was declared");

clippy_lints/src/non_expressive_names.rs

@@ -68,8 +68,8 @@ const WHITELIST: &'static [&'static [&'static str]] = &[
 
 struct SimilarNamesNameVisitor<'a, 'b: 'a, 'c: 'b>(&'a mut SimilarNamesLocalVisitor<'b, 'c>);
 
-impl<'v, 'a, 'b, 'c> Visitor<'v> for SimilarNamesNameVisitor<'a, 'b, 'c> {
-    fn visit_pat(&mut self, pat: &'v Pat) {
+impl<'a, 'b, 'c> Visitor for SimilarNamesNameVisitor<'a, 'b, 'c> {
+    fn visit_pat(&mut self, pat: &Pat) {
         match pat.node {
             PatKind::Ident(_, id, _) => self.check_name(id.span, id.node.name),
             PatKind::Struct(_, ref fields, _) => {
@@ -226,25 +226,25 @@ impl<'a, 'b> SimilarNamesLocalVisitor<'a, 'b> {
     }
 }
 
-impl<'v, 'a, 'b> Visitor<'v> for SimilarNamesLocalVisitor<'a, 'b> {
-    fn visit_local(&mut self, local: &'v Local) {
+impl<'a, 'b> Visitor for SimilarNamesLocalVisitor<'a, 'b> {
+    fn visit_local(&mut self, local: &Local) {
         if let Some(ref init) = local.init {
             self.apply(|this| walk_expr(this, &**init));
         }
         // add the pattern after the expression because the bindings aren't available yet in the init expression
         SimilarNamesNameVisitor(self).visit_pat(&*local.pat);
     }
-    fn visit_block(&mut self, blk: &'v Block) {
+    fn visit_block(&mut self, blk: &Block) {
         self.apply(|this| walk_block(this, blk));
     }
-    fn visit_arm(&mut self, arm: &'v Arm) {
+    fn visit_arm(&mut self, arm: &Arm) {
         self.apply(|this| {
             // just go through the first pattern, as either all patterns bind the same bindings or rustc would have errored much earlier
             SimilarNamesNameVisitor(this).visit_pat(&arm.pats[0]);
             this.apply(|this| walk_expr(this, &arm.body));
         });
     }
-    fn visit_item(&mut self, _: &'v Item) {
+    fn visit_item(&mut self, _: &Item) {
         // do not recurse into inner items
     }
 }

clippy_lints/src/returns.rs

@@ -36,13 +36,12 @@ pub struct ReturnPass;
 impl ReturnPass {
     // Check the final stmt or expr in a block for unnecessary return.
     fn check_block_return(&mut self, cx: &EarlyContext, block: &Block) {
-        if let Some(ref expr) = block.expr {
-            self.check_final_expr(cx, expr);
-        } else if let Some(stmt) = block.stmts.last() {
-            if let StmtKind::Semi(ref expr, _) = stmt.node {
-                if let ExprKind::Ret(Some(ref inner)) = expr.node {
-                    self.emit_return_lint(cx, (stmt.span, inner.span));
+        if let Some(stmt) = block.stmts.last() {
+            match stmt.node {
+                StmtKind::Expr(ref expr) | StmtKind::Semi(ref expr) => {
+                    self.check_final_expr(cx, expr);
                 }
+                _ => (),
             }
         }
     }
@@ -88,12 +87,14 @@ impl ReturnPass {
 
     // Check for "let x = EXPR; x"
     fn check_let_return(&mut self, cx: &EarlyContext, block: &Block) {
+        let mut it = block.stmts.iter();
+
         // we need both a let-binding stmt and an expr
         if_let_chain! {[
-            let Some(stmt) = block.stmts.last(),
-            let Some(ref retexpr) = block.expr,
-            let StmtKind::Decl(ref decl, _) = stmt.node,
-            let DeclKind::Local(ref local) = decl.node,
+            let Some(ref retexpr) = it.next_back(),
+            let StmtKind::Expr(ref retexpr) = retexpr.node,
+            let Some(stmt) = it.next_back(),
+            let StmtKind::Local(ref local) = stmt.node,
             let Some(ref initexpr) = local.init,
             let PatKind::Ident(_, Spanned { node: id, .. }, _) = local.pat.node,
             let ExprKind::Path(_, ref path) = retexpr.node,

mini-macro/src/lib.rs

@@ -5,7 +5,7 @@ extern crate rustc;
 extern crate rustc_plugin;
 
 use syntax::codemap::Span;
-use syntax::ast::TokenTree;
+use syntax::tokenstream::TokenTree;
 use syntax::ext::base::{ExtCtxt, MacResult, MacEager};
 use syntax::ext::build::AstBuilder;  // trait for expr_usize
 use rustc_plugin::Registry;

src/main.rs

@@ -2,17 +2,17 @@
 #![feature(box_syntax)]
 #![feature(rustc_private)]
 
-extern crate rustc_driver;
+extern crate clippy_lints;
 extern crate getopts;
 extern crate rustc;
-extern crate syntax;
+extern crate rustc_driver;
+extern crate rustc_errors;
 extern crate rustc_plugin;
-extern crate clippy_lints;
+extern crate syntax;
 
 use rustc_driver::{driver, CompilerCalls, RustcDefaultCalls, Compilation};
 use rustc::session::{config, Session};
 use rustc::session::config::{Input, ErrorOutputType};
-use syntax::diagnostics;
 use std::path::PathBuf;
 use std::process::Command;
 
@@ -36,7 +36,7 @@ impl<'a> CompilerCalls<'a> for ClippyCompilerCalls {
     fn early_callback(&mut self,
                       matches: &getopts::Matches,
                       sopts: &config::Options,
-                      descriptions: &diagnostics::registry::Registry,
+                      descriptions: &rustc_errors::registry::Registry,
                       output: ErrorOutputType)
                       -> Compilation {
         self.0.early_callback(matches, sopts, descriptions, output)
@@ -46,7 +46,7 @@ impl<'a> CompilerCalls<'a> for ClippyCompilerCalls {
                 sopts: &config::Options,
                 odir: &Option<PathBuf>,
                 ofile: &Option<PathBuf>,
-                descriptions: &diagnostics::registry::Registry)
+                descriptions: &rustc_errors::registry::Registry)
                 -> Option<(Input, Option<PathBuf>)> {
         self.0.no_input(matches, sopts, odir, ofile, descriptions)
     }

tests/compile-fail/formatting.rs

@@ -16,7 +16,9 @@ fn main() {
     //~| NOTE add the missing `else` or
     }
 
-    let _ = {
+    let _ = { // if as the last expression
+        let _ = 0;
+
         if foo() {
         } if foo() {
         //~^ ERROR this looks like an `else if` but the `else` is missing
@@ -26,6 +28,18 @@ fn main() {
         }
     };
 
+    let _ = { // if in the middle of a block
+        if foo() {
+        } if foo() {
+        //~^ ERROR this looks like an `else if` but the `else` is missing
+        //~| NOTE add the missing `else` or
+        }
+        else {
+        }
+
+        let _ = 0;
+    };
+
     if foo() {
     } else
     //~^ ERROR this is an `else if` but the formatting might hide it

tests/compile-fail/item_after_statement.rs

@@ -2,6 +2,16 @@
 #![plugin(clippy)]
 #![deny(items_after_statements)]
 
+fn ok() {
+    fn foo() { println!("foo"); }
+    foo();
+}
+
+fn last() {
+    foo();
+    fn foo() { println!("foo"); } //~ ERROR adding items after statements is confusing
+}
+
 fn main() {
     foo();
     fn foo() { println!("foo"); } //~ ERROR adding items after statements is confusing

tests/compile-fail/needless_bool.rs

@@ -1,8 +1,8 @@
 #![feature(plugin)]
 #![plugin(clippy)]
+#![deny(needless_bool)]
 
 #[allow(if_same_then_else)]
-#[deny(needless_bool)]
 fn main() {
     let x = true;
     if x { true } else { true }; //~ERROR this if-then-else expression will always return true
@@ -22,27 +22,27 @@ fn main() {
     bool_ret4(x);
 }
 
-#[deny(needless_bool)]
-#[allow(if_same_then_else)]
+#[allow(if_same_then_else, needless_return)]
 fn bool_ret(x: bool) -> bool {
-    if x { return true } else { return true }; //~ERROR this if-then-else expression will always return true
+    if x { return true } else { return true };
+    //~^ ERROR this if-then-else expression will always return true
 }
 
-#[deny(needless_bool)]
-#[allow(if_same_then_else)]
+#[allow(if_same_then_else, needless_return)]
 fn bool_ret2(x: bool) -> bool {
-    if x { return false } else { return false }; //~ERROR this if-then-else expression will always return false
+    if x { return false } else { return false };
+    //~^ ERROR this if-then-else expression will always return false
 }
 
-#[deny(needless_bool)]
+#[allow(needless_return)]
 fn bool_ret3(x: bool) -> bool {
     if x { return true } else { return false };
     //~^ ERROR this if-then-else expression returns a bool literal
     //~| HELP you can reduce it to
     //~| SUGGESTION `return x`
 }
 
-#[deny(needless_bool)]
+#[allow(needless_return)]
 fn bool_ret4(x: bool) -> bool {
     if x { return false } else { return true };
     //~^ ERROR this if-then-else expression returns a bool literal

tests/consts.rs

@@ -14,6 +14,7 @@ use syntax::ast::{LitIntType, LitKind, StrStyle};
 use syntax::codemap::{Spanned, COMMAND_LINE_SP};
 use syntax::parse::token::InternedString;
 use syntax::ptr::P;
+use syntax::util::ThinVec;
 
 fn spanned<T>(t: T) -> Spanned<T> {
     Spanned {
@@ -27,7 +28,7 @@ fn expr(n: Expr_) -> Expr {
         id: 1,
         node: n,
         span: COMMAND_LINE_SP,
-        attrs: None,
+        attrs: ThinVec::new(),
     }
 }