Merge pull request #1189 from Manishearth/easy

Add `zero_prefixed_literal` and `missing_docs_in_private_items` lints

CHANGELOG.md

@@ -1,6 +1,9 @@
 # Change Log
 All notable changes to this project will be documented in this file.
 
+## 0.0.86 — ?
+* New lints: [`missing_docs_in_private_items`], [`zero_prefixed_literal`]
+
 ## 0.0.85 — 2016-08-19
 * Fix ICE with [`useless_attribute`]
 * [`useless_attribute`] ignores [`unused_imports`] on `use` statements
@@ -238,6 +241,7 @@ All notable changes to this project will be documented in this file.
 [`mem_forget`]: https://github.com/Manishearth/rust-clippy/wiki#mem_forget
 [`min_max`]: https://github.com/Manishearth/rust-clippy/wiki#min_max
 [`misrefactored_assign_op`]: https://github.com/Manishearth/rust-clippy/wiki#misrefactored_assign_op
+[`missing_docs_in_private_items`]: https://github.com/Manishearth/rust-clippy/wiki#missing_docs_in_private_items
 [`mixed_case_hex_literals`]: https://github.com/Manishearth/rust-clippy/wiki#mixed_case_hex_literals
 [`module_inception`]: https://github.com/Manishearth/rust-clippy/wiki#module_inception
 [`modulo_one`]: https://github.com/Manishearth/rust-clippy/wiki#modulo_one
@@ -329,5 +333,6 @@ All notable changes to this project will be documented in this file.
 [`wrong_self_convention`]: https://github.com/Manishearth/rust-clippy/wiki#wrong_self_convention
 [`wrong_transmute`]: https://github.com/Manishearth/rust-clippy/wiki#wrong_transmute
 [`zero_divided_by_zero`]: https://github.com/Manishearth/rust-clippy/wiki#zero_divided_by_zero
+[`zero_prefixed_literal`]: https://github.com/Manishearth/rust-clippy/wiki#zero_prefixed_literal
 [`zero_width_space`]: https://github.com/Manishearth/rust-clippy/wiki#zero_width_space
 <!-- end autogenerated links to wiki -->

README.md

@@ -17,7 +17,7 @@ Table of contents:
 
 ## Lints
 
-There are 167 lints included in this crate:
+There are 169 lints included in this crate:
 
 name                                                                                                                 | default | triggers on
 ---------------------------------------------------------------------------------------------------------------------|---------|----------------------------------------------------------------------------------------------------------------------------------
@@ -100,6 +100,7 @@ name
 [mem_forget](https://github.com/Manishearth/rust-clippy/wiki#mem_forget)                                             | allow   | `mem::forget` usage on `Drop` types, likely to cause memory leaks
 [min_max](https://github.com/Manishearth/rust-clippy/wiki#min_max)                                                   | warn    | `min(_, max(_, _))` (or vice versa) with bounds clamping the result to a constant
 [misrefactored_assign_op](https://github.com/Manishearth/rust-clippy/wiki#misrefactored_assign_op)                   | warn    | having a variable on both sides of an assign op
+[missing_docs_in_private_items](https://github.com/Manishearth/rust-clippy/wiki#missing_docs_in_private_items)       | allow   | detects missing documentation for public and private members
 [mixed_case_hex_literals](https://github.com/Manishearth/rust-clippy/wiki#mixed_case_hex_literals)                   | warn    | hex literals whose letter digits are not consistently upper- or lowercased
 [module_inception](https://github.com/Manishearth/rust-clippy/wiki#module_inception)                                 | warn    | modules that have the same name as their parent module
 [modulo_one](https://github.com/Manishearth/rust-clippy/wiki#modulo_one)                                             | warn    | taking a number modulo 1, which always returns 0
@@ -187,6 +188,7 @@ name
 [wrong_self_convention](https://github.com/Manishearth/rust-clippy/wiki#wrong_self_convention)                       | warn    | defining a method named with an established prefix (like "into_") that takes `self` with the wrong convention
 [wrong_transmute](https://github.com/Manishearth/rust-clippy/wiki#wrong_transmute)                                   | warn    | transmutes that are confusing at best, undefined behaviour at worst and always useless
 [zero_divided_by_zero](https://github.com/Manishearth/rust-clippy/wiki#zero_divided_by_zero)                         | warn    | usage of `0.0 / 0.0` to obtain NaN instead of std::f32::NaN or std::f64::NaN
+[zero_prefixed_literal](https://github.com/Manishearth/rust-clippy/wiki#zero_prefixed_literal)                       | warn    | integer literals starting with `0`
 [zero_width_space](https://github.com/Manishearth/rust-clippy/wiki#zero_width_space)                                 | deny    | using a zero-width space in a string literal, which is confusing
 
 More to come, please [file an issue](https://github.com/Manishearth/rust-clippy/issues) if you have ideas!

clippy_lints/src/lib.rs

@@ -10,7 +10,7 @@
 #![feature(stmt_expr_attributes)]
 #![feature(type_macros)]
 
-#![allow(indexing_slicing, shadow_reuse, unknown_lints)]
+#![allow(indexing_slicing, shadow_reuse, unknown_lints, missing_docs_in_private_items)]
 
 #[macro_use]
 extern crate syntax;
@@ -96,6 +96,7 @@ macro_rules! declare_restriction_lint {
 pub mod minmax;
 pub mod misc;
 pub mod misc_early;
+pub mod missing_doc;
 pub mod module_inception;
 pub mod mut_mut;
 pub mod mut_reference;
@@ -260,6 +261,7 @@ pub fn register_plugins(reg: &mut rustc_plugin::Registry) {
     reg.register_late_lint_pass(box assign_ops::AssignOps);
     reg.register_late_lint_pass(box let_if_seq::LetIfSeq);
     reg.register_late_lint_pass(box eval_order_dependence::EvalOrderDependence);
+    reg.register_late_lint_pass(box missing_doc::MissingDoc::new());
 
     reg.register_lint_group("clippy_restrictions", vec![
         arithmetic::FLOAT_ARITHMETIC,
@@ -282,6 +284,7 @@ pub fn register_plugins(reg: &mut rustc_plugin::Registry) {
         methods::WRONG_PUB_SELF_CONVENTION,
         misc::USED_UNDERSCORE_BINDING,
         misc_early::UNSEPARATED_LITERAL_SUFFIX,
+        missing_doc::MISSING_DOCS_IN_PRIVATE_ITEMS,
         mut_mut::MUT_MUT,
         mutex_atomic::MUTEX_INTEGER,
         non_expressive_names::SIMILAR_NAMES,
@@ -387,6 +390,7 @@ pub fn register_plugins(reg: &mut rustc_plugin::Registry) {
         misc_early::MIXED_CASE_HEX_LITERALS,
         misc_early::REDUNDANT_CLOSURE_CALL,
         misc_early::UNNEEDED_FIELD_PATTERN,
+        misc_early::ZERO_PREFIXED_LITERAL,
         module_inception::MODULE_INCEPTION,
         mut_reference::UNNECESSARY_MUT_PASSED,
         mutex_atomic::MUTEX_ATOMIC,

clippy_lints/src/misc_early.rs

@@ -105,6 +105,42 @@
     "literals whose suffix is not separated by an underscore"
 }
 
+/// **What it does:** Warns if a integral constant literal starts with `0`.
+///
+/// **Why is this bad?** In some languages (including the infamous C language and most of its
+/// familly), this marks an octal constant. In Rust however, this is a decimal constant. This could
+/// be confusing for both the writer and a reader of the constant.
+///
+/// **Known problems:** None.
+///
+/// **Example:**
+///
+/// In Rust:
+/// ```rust
+/// fn main() {
+///     let a = 0123;
+///     println!("{}", a);
+/// }
+/// ```
+///
+/// prints `123`, while in C:
+///
+/// ```c
+/// #include <stdio.h>
+///
+/// int main() {
+///     int a = 0123;
+///     printf("%d\n", a);
+/// }
+/// ```
+///
+/// prints `83` (as `89 == 0o123` while `123 == 0o173`).
+declare_lint! {
+    pub ZERO_PREFIXED_LITERAL,
+    Warn,
+    "integer literals starting with `0`"
+}
+
 
 #[derive(Copy, Clone)]
 pub struct MiscEarly;
@@ -112,7 +148,8 @@
 impl LintPass for MiscEarly {
     fn get_lints(&self) -> LintArray {
         lint_array!(UNNEEDED_FIELD_PATTERN, DUPLICATE_UNDERSCORE_ARGUMENT, REDUNDANT_CLOSURE_CALL,
-                    DOUBLE_NEG, MIXED_CASE_HEX_LITERALS, UNSEPARATED_LITERAL_SUFFIX)
+                    DOUBLE_NEG, MIXED_CASE_HEX_LITERALS, UNSEPARATED_LITERAL_SUFFIX,
+                    ZERO_PREFIXED_LITERAL)
     }
 }
 
@@ -220,7 +257,7 @@ fn check_expr(&mut self, cx: &EarlyContext, expr: &Expr) {
             }
             ExprKind::Lit(ref lit) => {
                 if_let_chain! {[
-                    let LitKind::Int(..) = lit.node,
+                    let LitKind::Int(value, ..) = lit.node,
                     let Some(src) = snippet_opt(cx, lit.span),
                     let Some(firstch) = src.chars().next(),
                     char::to_digit(firstch, 10).is_some()
@@ -250,6 +287,15 @@ fn check_expr(&mut self, cx: &EarlyContext, expr: &Expr) {
                             span_lint(cx, MIXED_CASE_HEX_LITERALS, lit.span,
                                       "inconsistent casing in hexadecimal literal");
                         }
+                    } else if value != 0 && src.starts_with('0') {
+                        span_lint_and_then(cx,
+                                           ZERO_PREFIXED_LITERAL,
+                                           lit.span,
+                                           "this is a decimal constant",
+                                           |db| {
+                            db.span_suggestion(lit.span, "if you mean to use a decimal constant, remove the `0` to remove confusion:", src[1..].to_string());
+                            db.span_suggestion(lit.span, "if you mean to use an octal constant, use `0o`:", format!("0o{}", &src[1..]));
+                        });
                     }
                 }}
                 if_let_chain! {[

clippy_lints/src/missing_doc.rs

@@ -0,0 +1,178 @@
+/* This file incorporates work covered by the following copyright and
+ * permission notice:
+ *   Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
+ *   file at the top-level directory of this distribution and at
+ *   http://rust-lang.org/COPYRIGHT.
+ *
+ *   Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+ *   http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+ *   <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+ *   option. This file may not be copied, modified, or distributed
+ *   except according to those terms.
+ */
+
+/* Note: More specifically this lint is largely inspired (aka copied) from *rustc*'s
+ * [`missing_doc`].
+ *
+ * [`missing_doc`]: https://github.com/rust-lang/rust/blob/d6d05904697d89099b55da3331155392f1db9c00/src/librustc_lint/builtin.rs#L246
+ */
+
+use rustc::hir;
+use rustc::lint::*;
+use rustc::ty;
+use syntax::ast;
+use syntax::attr::{self, AttrMetaMethods};
+use syntax::codemap::Span;
+use utils::in_macro;
+
+/// **What it does:** Warns if there is missing doc for any documentable item (public or private).
+///
+/// **Why is this bad?** Doc is good. *rustc* has a `MISSING_DOCS` allowed-by-default lint for
+/// public members, but has no way to enforce documentation of private items. This lint fixes that.
+///
+/// **Known problems:** None.
+declare_lint! {
+    pub MISSING_DOCS_IN_PRIVATE_ITEMS,
+    Allow,
+    "detects missing documentation for public and private members"
+}
+
+pub struct MissingDoc {
+    /// Stack of whether #[doc(hidden)] is set
+    /// at each level which has lint attributes.
+    doc_hidden_stack: Vec<bool>,
+}
+
+impl ::std::default::Default for MissingDoc {
+    fn default() -> MissingDoc {
+        MissingDoc::new()
+    }
+}
+
+impl MissingDoc {
+    pub fn new() -> MissingDoc {
+        MissingDoc {
+            doc_hidden_stack: vec![false],
+        }
+    }
+
+    fn doc_hidden(&self) -> bool {
+        *self.doc_hidden_stack.last().expect("empty doc_hidden_stack")
+    }
+
+    fn check_missing_docs_attrs(&self,
+                               cx: &LateContext,
+                               attrs: &[ast::Attribute],
+                               sp: Span,
+                               desc: &'static str) {
+        // If we're building a test harness, then warning about
+        // documentation is probably not really relevant right now.
+        if cx.sess().opts.test {
+            return;
+        }
+
+        // `#[doc(hidden)]` disables missing_docs check.
+        if self.doc_hidden() {
+            return;
+        }
+
+        if in_macro(cx, sp) {
+            return;
+        }
+
+        let has_doc = attrs.iter().any(|a| a.is_value_str() && a.name() == "doc");
+        if !has_doc {
+            cx.span_lint(MISSING_DOCS_IN_PRIVATE_ITEMS, sp,
+                         &format!("missing documentation for {}", desc));
+        }
+    }
+}
+
+impl LintPass for MissingDoc {
+    fn get_lints(&self) -> LintArray {
+        lint_array![MISSING_DOCS_IN_PRIVATE_ITEMS]
+    }
+}
+
+impl LateLintPass for MissingDoc {
+    fn enter_lint_attrs(&mut self, _: &LateContext, attrs: &[ast::Attribute]) {
+        let doc_hidden = self.doc_hidden() || attrs.iter().any(|attr| {
+            attr.check_name("doc") && match attr.meta_item_list() {
+                None => false,
+                Some(l) => attr::contains_name(&l[..], "hidden"),
+            }
+        });
+        self.doc_hidden_stack.push(doc_hidden);
+    }
+
+    fn exit_lint_attrs(&mut self, _: &LateContext, _: &[ast::Attribute]) {
+        self.doc_hidden_stack.pop().expect("empty doc_hidden_stack");
+    }
+
+    fn check_crate(&mut self, cx: &LateContext, krate: &hir::Crate) {
+        self.check_missing_docs_attrs(cx, &krate.attrs, krate.span, "crate");
+    }
+
+    fn check_item(&mut self, cx: &LateContext, it: &hir::Item) {
+        let desc = match it.node {
+            hir::ItemConst(..) => "a constant",
+            hir::ItemEnum(..) => "an enum",
+            hir::ItemFn(..) => "a function",
+            hir::ItemMod(..) => "a module",
+            hir::ItemStatic(..) => "a static",
+            hir::ItemStruct(..) => "a struct",
+            hir::ItemTrait(..) => "a trait",
+            hir::ItemTy(..) => "a type alias",
+            hir::ItemDefaultImpl(..) |
+            hir::ItemExternCrate(..) |
+            hir::ItemForeignMod(..) |
+            hir::ItemImpl(..) |
+            hir::ItemUse(..) => return,
+        };
+
+        self.check_missing_docs_attrs(cx, &it.attrs, it.span, desc);
+    }
+
+    fn check_trait_item(&mut self, cx: &LateContext, trait_item: &hir::TraitItem) {
+        let desc = match trait_item.node {
+            hir::ConstTraitItem(..) => "an associated constant",
+            hir::MethodTraitItem(..) => "a trait method",
+            hir::TypeTraitItem(..) => "an associated type",
+        };
+
+        self.check_missing_docs_attrs(cx, &trait_item.attrs, trait_item.span, desc);
+    }
+
+    fn check_impl_item(&mut self, cx: &LateContext, impl_item: &hir::ImplItem) {
+        // If the method is an impl for a trait, don't doc.
+        let def_id = cx.tcx.map.local_def_id(impl_item.id);
+        match cx.tcx.impl_or_trait_items.borrow()
+                                         .get(&def_id)
+                                         .expect("missing method descriptor?!")
+                                         .container() {
+            ty::TraitContainer(_) => return,
+            ty::ImplContainer(cid) => {
+                if cx.tcx.impl_trait_ref(cid).is_some() {
+                    return
+                }
+            }
+        }
+
+        let desc = match impl_item.node {
+            hir::ImplItemKind::Const(..) => "an associated constant",
+            hir::ImplItemKind::Method(..) => "a method",
+            hir::ImplItemKind::Type(_) => "an associated type",
+        };
+        self.check_missing_docs_attrs(cx, &impl_item.attrs, impl_item.span, desc);
+    }
+
+    fn check_struct_field(&mut self, cx: &LateContext, sf: &hir::StructField) {
+        if !sf.is_positional() {
+            self.check_missing_docs_attrs(cx, &sf.attrs, sf.span, "a struct field");
+        }
+    }
+
+    fn check_variant(&mut self, cx: &LateContext, v: &hir::Variant, _: &hir::Generics) {
+        self.check_missing_docs_attrs(cx, &v.node.attrs, v.span, "a variant");
+    }
+}

clippy_lints/src/utils/comparisons.rs

@@ -1,14 +1,23 @@
+//! Utility functions about comparison operators.
+
+#![deny(missing_docs_in_private_items)]
+
 use rustc::hir::{BinOp_, Expr};
 
 #[derive(PartialEq, Eq, Debug, Copy, Clone)]
+/// Represent a normalized comparison operator.
 pub enum Rel {
+    /// `<`
     Lt,
+    /// `<=`
     Le,
+    /// `==`
     Eq,
+    /// `!=`
     Ne,
 }
 
-/// Put the expression in the form  `lhs < rhs` or `lhs <= rhs`.
+/// Put the expression in the form  `lhs < rhs`, `lhs <= rhs`, `lhs == rhs` or `lhs != rhs`.
 pub fn normalize_comparison<'a>(op: BinOp_, lhs: &'a Expr, rhs: &'a Expr)
                                 -> Option<(Rel, &'a Expr, &'a Expr)> {
     match op {

clippy_lints/src/utils/conf.rs

@@ -1,3 +1,7 @@
+//! Read configurations files.
+
+#![deny(missing_docs_in_private_items)]
+
 use std::{fmt, fs, io};
 use std::io::Read;
 use syntax::{ast, codemap, ptr};
@@ -32,9 +36,20 @@ pub fn file(args: &[ptr::P<ast::MetaItem>]) -> Result<Option<token::InternedStri
 /// Error from reading a configuration file.
 #[derive(Debug)]
 pub enum Error {
+    /// An I/O error.
     Io(io::Error),
+    /// The file is not valid TOML.
     Toml(Vec<toml::ParserError>),
-    Type(&'static str, &'static str, &'static str),
+    /// Type error.
+    Type(
+        /// The name of the key.
+        &'static str,
+        /// The expected type.
+        &'static str,
+        /// The type we got instead.
+        &'static str
+    ),
+    /// There is an unknown key is the file.
     UnknownKey(String),
 }
 

clippy_lints/src/utils/higher.rs

@@ -1,5 +1,7 @@
 //! This module contains functions for retrieve the original AST from lowered `hir`.
 
+#![deny(missing_docs_in_private_items)]
+
 use rustc::hir;
 use rustc::lint::LateContext;
 use syntax::ast;
@@ -33,14 +35,17 @@ pub fn binop(op: hir::BinOp_) -> ast::BinOpKind {
 /// Represent a range akin to `ast::ExprKind::Range`.
 #[derive(Debug, Copy, Clone)]
 pub struct Range<'a> {
+    /// The lower bound of the range, or `None` for ranges such as `..X`.
     pub start: Option<&'a hir::Expr>,
+    /// The upper bound of the range, or `None` for ranges such as `X..`.
     pub end: Option<&'a hir::Expr>,
+    /// Whether the interval is open or closed.
     pub limits: ast::RangeLimits,
 }
 
 /// Higher a `hir` range to something similar to `ast::ExprKind::Range`.
 pub fn range(expr: &hir::Expr) -> Option<Range> {
-    // To be removed when ranges get stable.
+    /// Skip unstable blocks. To be removed when ranges get stable.
     fn unwrap_unstable(expr: &hir::Expr) -> &hir::Expr {
         if let hir::ExprBlock(ref block) = expr.node {
             if block.rules == hir::BlockCheckMode::PushUnstableBlock || block.rules == hir::BlockCheckMode::PopUnstableBlock {
@@ -53,6 +58,7 @@ fn unwrap_unstable(expr: &hir::Expr) -> &hir::Expr {
         expr
     }
 
+    /// Find the field named `name` in the field. Always return `Some` for convenience.
     fn get_field<'a>(name: &str, fields: &'a [hir::Field]) -> Option<&'a hir::Expr> {
         let expr = &fields.iter()
                           .find(|field| field.name.node.as_str() == name)

clippy_lints/src/utils/sugg.rs

@@ -1,3 +1,6 @@
+//! Contains utility functions to generate suggestions.
+#![deny(missing_docs_in_private_items)]
+
 use rustc::hir;
 use rustc::lint::{EarlyContext, LateContext, LintContext};
 use rustc_errors;
@@ -35,6 +38,7 @@ fn fmt(&self, f: &mut std::fmt::Formatter) -> Result<(), std::fmt::Error> {
 
 #[allow(wrong_self_convention)] // ok, because of the function `as_ty` method
 impl<'a> Sugg<'a> {
+    /// Prepare a suggestion from an expression.
     pub fn hir_opt(cx: &LateContext, expr: &hir::Expr) -> Option<Sugg<'a>> {
         snippet_opt(cx, expr.span).map(|snippet| {
             let snippet = Cow::Owned(snippet);
@@ -72,10 +76,12 @@ pub fn hir_opt(cx: &LateContext, expr: &hir::Expr) -> Option<Sugg<'a>> {
         })
     }
 
+    /// Convenience function around `hir_opt` for suggestions with a default text.
     pub fn hir(cx: &LateContext, expr: &hir::Expr, default: &'a str) -> Sugg<'a> {
         Self::hir_opt(cx, expr).unwrap_or_else(|| Sugg::NonParen(Cow::Borrowed(default)))
     }
 
+    /// Prepare a suggestion from an expression.
     pub fn ast(cx: &EarlyContext, expr: &ast::Expr, default: &'a str) -> Sugg<'a> {
         use syntax::ast::RangeLimits;
 
@@ -193,12 +199,16 @@ fn not(self) -> Sugg<'static> {
     }
 }
 
+/// Helper type to display either `foo` or `(foo)`.
 struct ParenHelper<T> {
+    /// Whether parenthesis are needed.
     paren: bool,
+    /// The main thing to display.
     wrapped: T,
 }
 
 impl<T> ParenHelper<T> {
+    /// Build a `ParenHelper`.
     fn new(paren: bool, wrapped: T) -> Self {
         ParenHelper {
             paren: paren,
@@ -230,14 +240,18 @@ pub fn make_unop(op: &str, expr: Sugg) -> Sugg<'static> {
 /// Precedence of shift operator relative to other arithmetic operation is often confusing so
 /// parenthesis will always be added for a mix of these.
 pub fn make_assoc(op: AssocOp, lhs: &Sugg, rhs: &Sugg) -> Sugg<'static> {
+    /// Whether the operator is a shift operator `<<` or `>>`.
     fn is_shift(op: &AssocOp) -> bool {
         matches!(*op, AssocOp::ShiftLeft | AssocOp::ShiftRight)
     }
 
+    /// Whether the operator is a arithmetic operator (`+`, `-`, `*`, `/`, `%`).
     fn is_arith(op: &AssocOp) -> bool {
         matches!(*op, AssocOp::Add | AssocOp::Subtract | AssocOp::Multiply | AssocOp::Divide | AssocOp::Modulus)
     }
 
+    /// Whether the operator `op` needs parenthesis with the operator `other` in the direction
+    /// `dir`.
     fn needs_paren(op: &AssocOp, other: &AssocOp, dir: Associativity) -> bool {
         other.precedence() < op.precedence() ||
             (other.precedence() == op.precedence() &&
@@ -298,10 +312,15 @@ pub fn make_binop(op: ast::BinOpKind, lhs: &Sugg, rhs: &Sugg) -> Sugg<'static> {
 }
 
 #[derive(PartialEq, Eq)]
+/// Operator associativity.
 enum Associativity {
+    /// The operator is both left-associative and right-associative.
     Both,
+    /// The operator is left-associative.
     Left,
+    /// The operator is not associative.
     None,
+    /// The operator is right-associative.
     Right,
 }
 
@@ -383,6 +402,7 @@ fn indentation<T: LintContext>(cx: &T, span: Span) -> Option<String> {
     }
 }
 
+/// Convenience extension trait for `DiagnosticBuilder`.
 pub trait DiagnosticBuilderExt<T: LintContext> {
     /// Suggests to add an attribute to an item.
     ///

src/lib.rs

@@ -2,6 +2,7 @@
 #![feature(plugin_registrar)]
 #![feature(rustc_private)]
 #![allow(unknown_lints)]
+#![allow(missing_docs_in_private_items)]
 
 extern crate rustc_plugin;
 use rustc_plugin::Registry;

src/main.rs

@@ -2,6 +2,8 @@
 #![feature(box_syntax)]
 #![feature(rustc_private)]
 
+#![allow(unknown_lints, missing_docs_in_private_items)]
+
 extern crate clippy_lints;
 extern crate getopts;
 extern crate rustc;

tests/compile-fail/enum_glob_use.rs

@@ -1,7 +1,7 @@
 #![feature(plugin)]
 #![plugin(clippy)]
 #![deny(clippy, clippy_pedantic)]
-#![allow(unused_imports, dead_code)]
+#![allow(unused_imports, dead_code, missing_docs_in_private_items)]
 
 use std::cmp::Ordering::*; //~ ERROR: don't use glob imports for enum variants
 

tests/compile-fail/filter_methods.rs

@@ -2,6 +2,8 @@
 #![plugin(clippy)]
 
 #![deny(clippy, clippy_pedantic)]
+#![allow(missing_docs_in_private_items)]
+
 fn main() {
     let _: Vec<_> = vec![5; 6].into_iter() //~ERROR called `filter(p).map(q)` on an `Iterator`
                               .filter(|&x| x == 0)

tests/compile-fail/literals.rs

@@ -2,6 +2,7 @@
 #![plugin(clippy)]
 #![deny(mixed_case_hex_literals)]
 #![deny(unseparated_literal_suffix)]
+#![deny(zero_prefixed_literal)]
 #![allow(dead_code)]
 
 fn main() {
@@ -22,4 +23,13 @@ fn main() {
     let fail5 = 1234isize;    //~ERROR integer type suffix should be separated
     let fail6 = 1234usize;    //~ERROR integer type suffix should be separated
     let fail7 = 1.5f32;       //~ERROR float type suffix should be separated
+
+    let ok9 = 0;
+    let ok10 = 0_i64;
+    let fail8 = 0123;
+    //~^ERROR decimal constant
+    //~|HELP remove the `0`
+    //~|SUGGESTION = 123;
+    //~|HELP use `0o`
+    //~|SUGGESTION = 0o123;
 }

tests/compile-fail/methods.rs

@@ -3,7 +3,7 @@
 #![plugin(clippy)]
 
 #![deny(clippy, clippy_pedantic)]
-#![allow(blacklisted_name, unused, print_stdout, non_ascii_literal, new_without_default, new_without_default_derive)]
+#![allow(blacklisted_name, unused, print_stdout, non_ascii_literal, new_without_default, new_without_default_derive, missing_docs_in_private_items)]
 
 use std::collections::BTreeMap;
 use std::collections::HashMap;

tests/compile-fail/missing-doc.rs

@@ -0,0 +1,202 @@
+/* This file incorporates work covered by the following copyright and
+ * permission notice:
+ *   Copyright 2013 The Rust Project Developers. See the COPYRIGHT
+ *   file at the top-level directory of this distribution and at
+ *   http://rust-lang.org/COPYRIGHT.
+ *
+ *   Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+ *   http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+ *   <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+ *   option. This file may not be copied, modified, or distributed
+ *   except according to those terms.
+ */
+
+#![feature(plugin)]
+#![plugin(clippy)]
+#![deny(missing_docs_in_private_items)]
+
+// When denying at the crate level, be sure to not get random warnings from the
+// injected intrinsics by the compiler.
+#![allow(dead_code)]
+#![feature(associated_type_defaults)]
+
+//! Some garbage docs for the crate here
+#![doc="More garbage"]
+
+type Typedef = String; //~ ERROR: missing documentation for a type alias
+pub type PubTypedef = String; //~ ERROR: missing documentation for a type alias
+
+struct Foo { //~ ERROR: missing documentation for a struct
+    a: isize, //~ ERROR: missing documentation for a struct field
+    b: isize, //~ ERROR: missing documentation for a struct field
+}
+
+pub struct PubFoo { //~ ERROR: missing documentation for a struct
+    pub a: isize,      //~ ERROR: missing documentation for a struct field
+    b: isize, //~ ERROR: missing documentation for a struct field
+}
+
+#[allow(missing_docs_in_private_items)]
+pub struct PubFoo2 {
+    pub a: isize,
+    pub c: isize,
+}
+
+mod module_no_dox {} //~ ERROR: missing documentation for a module
+pub mod pub_module_no_dox {} //~ ERROR: missing documentation for a module
+
+/// dox
+pub fn foo() {}
+pub fn foo2() {} //~ ERROR: missing documentation for a function
+fn foo3() {} //~ ERROR: missing documentation for a function
+#[allow(missing_docs_in_private_items)] pub fn foo4() {}
+
+/// dox
+pub trait A {
+    /// dox
+    fn foo(&self);
+    /// dox
+    fn foo_with_impl(&self) {}
+}
+
+#[allow(missing_docs_in_private_items)]
+trait B {
+    fn foo(&self);
+    fn foo_with_impl(&self) {}
+}
+
+pub trait C { //~ ERROR: missing documentation for a trait
+    fn foo(&self); //~ ERROR: missing documentation for a trait method
+    fn foo_with_impl(&self) {} //~ ERROR: missing documentation for a trait method
+}
+
+#[allow(missing_docs_in_private_items)]
+pub trait D {
+    fn dummy(&self) { }
+}
+
+/// dox
+pub trait E {
+    type AssociatedType; //~ ERROR: missing documentation for an associated type
+    type AssociatedTypeDef = Self; //~ ERROR: missing documentation for an associated type
+
+    /// dox
+    type DocumentedType;
+    /// dox
+    type DocumentedTypeDef = Self;
+    /// dox
+    fn dummy(&self) {}
+}
+
+impl Foo {
+    pub fn foo() {} //~ ERROR: missing documentation for a method
+    fn bar() {} //~ ERROR: missing documentation for a method
+}
+
+impl PubFoo {
+    pub fn foo() {} //~ ERROR: missing documentation for a method
+    /// dox
+    pub fn foo1() {}
+    fn foo2() {} //~ ERROR: missing documentation for a method
+    #[allow(missing_docs_in_private_items)] pub fn foo3() {}
+}
+
+#[allow(missing_docs_in_private_items)]
+trait F {
+    fn a();
+    fn b(&self);
+}
+
+// should need to redefine documentation for implementations of traits
+impl F for Foo {
+    fn a() {}
+    fn b(&self) {}
+}
+
+// It sure is nice if doc(hidden) implies allow(missing_docs), and that it
+// applies recursively
+#[doc(hidden)]
+mod a {
+    pub fn baz() {}
+    pub mod b {
+        pub fn baz() {}
+    }
+}
+
+enum Baz { //~ ERROR: missing documentation for an enum
+    BazA { //~ ERROR: missing documentation for a variant
+        a: isize, //~ ERROR: missing documentation for a struct field
+        b: isize //~ ERROR: missing documentation for a struct field
+    },
+    BarB //~ ERROR: missing documentation for a variant
+}
+
+pub enum PubBaz { //~ ERROR: missing documentation for an enum
+    PubBazA { //~ ERROR: missing documentation for a variant
+        a: isize, //~ ERROR: missing documentation for a struct field
+    },
+}
+
+/// dox
+pub enum PubBaz2 {
+    /// dox
+    PubBaz2A {
+        /// dox
+        a: isize,
+    },
+}
+
+#[allow(missing_docs_in_private_items)]
+pub enum PubBaz3 {
+    PubBaz3A {
+        b: isize
+    },
+}
+
+#[doc(hidden)]
+pub fn baz() {}
+
+
+const FOO: u32 = 0; //~ ERROR: missing documentation for a const
+/// dox
+pub const FOO1: u32 = 0;
+#[allow(missing_docs_in_private_items)]
+pub const FOO2: u32 = 0;
+#[doc(hidden)]
+pub const FOO3: u32 = 0;
+pub const FOO4: u32 = 0; //~ ERROR: missing documentation for a const
+
+
+static BAR: u32 = 0; //~ ERROR: missing documentation for a static
+/// dox
+pub static BAR1: u32 = 0;
+#[allow(missing_docs_in_private_items)]
+pub static BAR2: u32 = 0;
+#[doc(hidden)]
+pub static BAR3: u32 = 0;
+pub static BAR4: u32 = 0; //~ ERROR: missing documentation for a static
+
+
+mod internal_impl { //~ ERROR: missing documentation for a module
+    /// dox
+    pub fn documented() {}
+    pub fn undocumented1() {} //~ ERROR: missing documentation for a function
+    pub fn undocumented2() {} //~ ERROR: missing documentation for a function
+    fn undocumented3() {} //~ ERROR: missing documentation for a function
+    /// dox
+    pub mod globbed {
+        /// dox
+        pub fn also_documented() {}
+        pub fn also_undocumented1() {} //~ ERROR: missing documentation for a function
+        fn also_undocumented2() {} //~ ERROR: missing documentation for a function
+    }
+}
+/// dox
+pub mod public_interface {
+    pub use internal_impl::documented as foo;
+    pub use internal_impl::undocumented1 as bar;
+    pub use internal_impl::{documented, undocumented2};
+    pub use internal_impl::globbed::*;
+}
+
+fn main() {} //~ ERROR: missing documentation for a function

tests/compile-fail/shadow.rs

@@ -1,8 +1,8 @@
 #![feature(plugin)]
 #![plugin(clippy)]
 
-#![allow(unused_parens, unused_variables)]
 #![deny(clippy, clippy_pedantic)]
+#![allow(unused_parens, unused_variables, missing_docs_in_private_items)]
 
 fn id<T>(x: T) -> T { x }