--- /dev/null
+// Copyright 2012-2014 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.
+
+//! Lints built in to rustc.
+
+use metadata::csearch;
+use middle::def;
+use middle::def::*;
+use middle::pat_util;
+use middle::trans::adt; // for `adt::is_ffi_safe`
+use middle::ty;
+use middle::typeck::astconv::{ast_ty_to_ty, AstConv};
+use middle::typeck::infer;
+use middle::typeck;
+use util::ppaux::{ty_to_str};
+use lint::Context;
+use lint;
+
+use std::cmp;
+use std::collections::HashMap;
+use std::i16;
+use std::i32;
+use std::i64;
+use std::i8;
+use std::u16;
+use std::u32;
+use std::u64;
+use std::u8;
+use syntax::abi;
+use syntax::ast_map;
+use syntax::attr::AttrMetaMethods;
+use syntax::attr;
+use syntax::codemap::Span;
+use syntax::parse::token;
+use syntax::visit::Visitor;
+use syntax::{ast, ast_util, visit};
+
+pub fn check_while_true_expr(cx: &Context, e: &ast::Expr) {
+ match e.node {
+ ast::ExprWhile(cond, _) => {
+ match cond.node {
+ ast::ExprLit(lit) => {
+ match lit.node {
+ ast::LitBool(true) => {
+ cx.span_lint(lint::WhileTrue,
+ e.span,
+ "denote infinite loops with loop \
+ { ... }");
+ }
+ _ => {}
+ }
+ }
+ _ => ()
+ }
+ }
+ _ => ()
+ }
+}
+
+pub fn check_unused_casts(cx: &Context, e: &ast::Expr) {
+ return match e.node {
+ ast::ExprCast(expr, ty) => {
+ let t_t = ast_ty_to_ty(cx, &infer::new_infer_ctxt(cx.tcx), ty);
+ if ty::get(ty::expr_ty(cx.tcx, expr)).sty == ty::get(t_t).sty {
+ cx.span_lint(lint::UnnecessaryTypecast, ty.span,
+ "unnecessary type cast");
+ }
+ }
+ _ => ()
+ };
+}
+
+pub fn check_type_limits(cx: &Context, e: &ast::Expr) {
+ return match e.node {
+ ast::ExprUnary(ast::UnNeg, ex) => {
+ match ex.node {
+ ast::ExprLit(lit) => {
+ match lit.node {
+ ast::LitUint(..) => {
+ cx.span_lint(lint::UnsignedNegate, e.span,
+ "negation of unsigned int literal may be unintentional");
+ },
+ _ => ()
+ }
+ },
+ _ => {
+ let t = ty::expr_ty(cx.tcx, ex);
+ match ty::get(t).sty {
+ ty::ty_uint(_) => {
+ cx.span_lint(lint::UnsignedNegate, e.span,
+ "negation of unsigned int variable may be unintentional");
+ },
+ _ => ()
+ }
+ }
+ }
+ },
+ ast::ExprBinary(binop, l, r) => {
+ if is_comparison(binop) && !check_limits(cx.tcx, binop, l, r) {
+ cx.span_lint(lint::TypeLimits, e.span,
+ "comparison is useless due to type limits");
+ }
+ },
+ ast::ExprLit(lit) => {
+ match ty::get(ty::expr_ty(cx.tcx, e)).sty {
+ ty::ty_int(t) => {
+ let int_type = if t == ast::TyI {
+ cx.tcx.sess.targ_cfg.int_type
+ } else { t };
+ let (min, max) = int_ty_range(int_type);
+ let mut lit_val: i64 = match lit.node {
+ ast::LitInt(v, _) => v,
+ ast::LitUint(v, _) => v as i64,
+ ast::LitIntUnsuffixed(v) => v,
+ _ => fail!()
+ };
+ if cx.negated_expr_id == e.id {
+ lit_val *= -1;
+ }
+ if lit_val < min || lit_val > max {
+ cx.span_lint(lint::TypeOverflow, e.span,
+ "literal out of range for its type");
+ }
+ },
+ ty::ty_uint(t) => {
+ let uint_type = if t == ast::TyU {
+ cx.tcx.sess.targ_cfg.uint_type
+ } else { t };
+ let (min, max) = uint_ty_range(uint_type);
+ let lit_val: u64 = match lit.node {
+ ast::LitInt(v, _) => v as u64,
+ ast::LitUint(v, _) => v,
+ ast::LitIntUnsuffixed(v) => v as u64,
+ _ => fail!()
+ };
+ if lit_val < min || lit_val > max {
+ cx.span_lint(lint::TypeOverflow, e.span,
+ "literal out of range for its type");
+ }
+ },
+
+ _ => ()
+ };
+ },
+ _ => ()
+ };
+
+ fn is_valid<T:cmp::PartialOrd>(binop: ast::BinOp, v: T,
+ min: T, max: T) -> bool {
+ match binop {
+ ast::BiLt => v > min && v <= max,
+ ast::BiLe => v >= min && v < max,
+ ast::BiGt => v >= min && v < max,
+ ast::BiGe => v > min && v <= max,
+ ast::BiEq | ast::BiNe => v >= min && v <= max,
+ _ => fail!()
+ }
+ }
+
+ fn rev_binop(binop: ast::BinOp) -> ast::BinOp {
+ match binop {
+ ast::BiLt => ast::BiGt,
+ ast::BiLe => ast::BiGe,
+ ast::BiGt => ast::BiLt,
+ ast::BiGe => ast::BiLe,
+ _ => binop
+ }
+ }
+
+ // for int & uint, be conservative with the warnings, so that the
+ // warnings are consistent between 32- and 64-bit platforms
+ fn int_ty_range(int_ty: ast::IntTy) -> (i64, i64) {
+ match int_ty {
+ ast::TyI => (i64::MIN, i64::MAX),
+ ast::TyI8 => (i8::MIN as i64, i8::MAX as i64),
+ ast::TyI16 => (i16::MIN as i64, i16::MAX as i64),
+ ast::TyI32 => (i32::MIN as i64, i32::MAX as i64),
+ ast::TyI64 => (i64::MIN, i64::MAX)
+ }
+ }
+
+ fn uint_ty_range(uint_ty: ast::UintTy) -> (u64, u64) {
+ match uint_ty {
+ ast::TyU => (u64::MIN, u64::MAX),
+ ast::TyU8 => (u8::MIN as u64, u8::MAX as u64),
+ ast::TyU16 => (u16::MIN as u64, u16::MAX as u64),
+ ast::TyU32 => (u32::MIN as u64, u32::MAX as u64),
+ ast::TyU64 => (u64::MIN, u64::MAX)
+ }
+ }
+
+ fn check_limits(tcx: &ty::ctxt, binop: ast::BinOp,
+ l: &ast::Expr, r: &ast::Expr) -> bool {
+ let (lit, expr, swap) = match (&l.node, &r.node) {
+ (&ast::ExprLit(_), _) => (l, r, true),
+ (_, &ast::ExprLit(_)) => (r, l, false),
+ _ => return true
+ };
+ // Normalize the binop so that the literal is always on the RHS in
+ // the comparison
+ let norm_binop = if swap { rev_binop(binop) } else { binop };
+ match ty::get(ty::expr_ty(tcx, expr)).sty {
+ ty::ty_int(int_ty) => {
+ let (min, max) = int_ty_range(int_ty);
+ let lit_val: i64 = match lit.node {
+ ast::ExprLit(li) => match li.node {
+ ast::LitInt(v, _) => v,
+ ast::LitUint(v, _) => v as i64,
+ ast::LitIntUnsuffixed(v) => v,
+ _ => return true
+ },
+ _ => fail!()
+ };
+ is_valid(norm_binop, lit_val, min, max)
+ }
+ ty::ty_uint(uint_ty) => {
+ let (min, max): (u64, u64) = uint_ty_range(uint_ty);
+ let lit_val: u64 = match lit.node {
+ ast::ExprLit(li) => match li.node {
+ ast::LitInt(v, _) => v as u64,
+ ast::LitUint(v, _) => v,
+ ast::LitIntUnsuffixed(v) => v as u64,
+ _ => return true
+ },
+ _ => fail!()
+ };
+ is_valid(norm_binop, lit_val, min, max)
+ }
+ _ => true
+ }
+ }
+
+ fn is_comparison(binop: ast::BinOp) -> bool {
+ match binop {
+ ast::BiEq | ast::BiLt | ast::BiLe |
+ ast::BiNe | ast::BiGe | ast::BiGt => true,
+ _ => false
+ }
+ }
+}
+
+pub fn check_item_ctypes(cx: &Context, it: &ast::Item) {
+ fn check_ty(cx: &Context, ty: &ast::Ty) {
+ match ty.node {
+ ast::TyPath(_, _, id) => {
+ match cx.tcx.def_map.borrow().get_copy(&id) {
+ def::DefPrimTy(ast::TyInt(ast::TyI)) => {
+ cx.span_lint(lint::CTypes, ty.span,
+ "found rust type `int` in foreign module, while \
+ libc::c_int or libc::c_long should be used");
+ }
+ def::DefPrimTy(ast::TyUint(ast::TyU)) => {
+ cx.span_lint(lint::CTypes, ty.span,
+ "found rust type `uint` in foreign module, while \
+ libc::c_uint or libc::c_ulong should be used");
+ }
+ def::DefTy(def_id) => {
+ if !adt::is_ffi_safe(cx.tcx, def_id) {
+ cx.span_lint(lint::CTypes, ty.span,
+ "found enum type without foreign-function-safe \
+ representation annotation in foreign module");
+ // hmm... this message could be more helpful
+ }
+ }
+ _ => ()
+ }
+ }
+ ast::TyPtr(ref mt) => { check_ty(cx, mt.ty) }
+ _ => {}
+ }
+ }
+
+ fn check_foreign_fn(cx: &Context, decl: &ast::FnDecl) {
+ for input in decl.inputs.iter() {
+ check_ty(cx, input.ty);
+ }
+ check_ty(cx, decl.output)
+ }
+
+ match it.node {
+ ast::ItemForeignMod(ref nmod) if nmod.abi != abi::RustIntrinsic => {
+ for ni in nmod.items.iter() {
+ match ni.node {
+ ast::ForeignItemFn(decl, _) => check_foreign_fn(cx, decl),
+ ast::ForeignItemStatic(t, _) => check_ty(cx, t)
+ }
+ }
+ }
+ _ => {/* nothing to do */ }
+ }
+}
+
+pub fn check_heap_type(cx: &Context, span: Span, ty: ty::t) {
+ let xs = [lint::ManagedHeapMemory, lint::OwnedHeapMemory, lint::HeapMemory];
+ for &lint in xs.iter() {
+ if cx.get_level(lint) == lint::Allow { continue }
+
+ let mut n_box = 0;
+ let mut n_uniq = 0;
+ ty::fold_ty(cx.tcx, ty, |t| {
+ match ty::get(t).sty {
+ ty::ty_box(_) => {
+ n_box += 1;
+ }
+ ty::ty_uniq(_) |
+ ty::ty_trait(box ty::TyTrait {
+ store: ty::UniqTraitStore, ..
+ }) |
+ ty::ty_closure(box ty::ClosureTy {
+ store: ty::UniqTraitStore,
+ ..
+ }) => {
+ n_uniq += 1;
+ }
+
+ _ => ()
+ };
+ t
+ });
+
+ if n_uniq > 0 && lint != lint::ManagedHeapMemory {
+ let s = ty_to_str(cx.tcx, ty);
+ let m = format!("type uses owned (Box type) pointers: {}", s);
+ cx.span_lint(lint, span, m.as_slice());
+ }
+
+ if n_box > 0 && lint != lint::OwnedHeapMemory {
+ let s = ty_to_str(cx.tcx, ty);
+ let m = format!("type uses managed (@ type) pointers: {}", s);
+ cx.span_lint(lint, span, m.as_slice());
+ }
+ }
+}
+
+pub fn check_heap_item(cx: &Context, it: &ast::Item) {
+ match it.node {
+ ast::ItemFn(..) |
+ ast::ItemTy(..) |
+ ast::ItemEnum(..) |
+ ast::ItemStruct(..) => check_heap_type(cx, it.span,
+ ty::node_id_to_type(cx.tcx,
+ it.id)),
+ _ => ()
+ }
+
+ // If it's a struct, we also have to check the fields' types
+ match it.node {
+ ast::ItemStruct(struct_def, _) => {
+ for struct_field in struct_def.fields.iter() {
+ check_heap_type(cx, struct_field.span,
+ ty::node_id_to_type(cx.tcx,
+ struct_field.node.id));
+ }
+ }
+ _ => ()
+ }
+}
+
+struct RawPtrDerivingVisitor<'a> {
+ cx: &'a Context<'a>
+}
+
+impl<'a> Visitor<()> for RawPtrDerivingVisitor<'a> {
+ fn visit_ty(&mut self, ty: &ast::Ty, _: ()) {
+ static MSG: &'static str = "use of `#[deriving]` with a raw pointer";
+ match ty.node {
+ ast::TyPtr(..) => self.cx.span_lint(lint::RawPointerDeriving, ty.span, MSG),
+ _ => {}
+ }
+ visit::walk_ty(self, ty, ());
+ }
+ // explicit override to a no-op to reduce code bloat
+ fn visit_expr(&mut self, _: &ast::Expr, _: ()) {}
+ fn visit_block(&mut self, _: &ast::Block, _: ()) {}
+}
+
+pub fn check_raw_ptr_deriving(cx: &mut Context, item: &ast::Item) {
+ if !attr::contains_name(item.attrs.as_slice(), "automatically_derived") {
+ return
+ }
+ let did = match item.node {
+ ast::ItemImpl(..) => {
+ match ty::get(ty::node_id_to_type(cx.tcx, item.id)).sty {
+ ty::ty_enum(did, _) => did,
+ ty::ty_struct(did, _) => did,
+ _ => return,
+ }
+ }
+ _ => return,
+ };
+ if !ast_util::is_local(did) { return }
+ let item = match cx.tcx.map.find(did.node) {
+ Some(ast_map::NodeItem(item)) => item,
+ _ => return,
+ };
+ if !cx.checked_raw_pointers.insert(item.id) { return }
+ match item.node {
+ ast::ItemStruct(..) | ast::ItemEnum(..) => {
+ let mut visitor = RawPtrDerivingVisitor { cx: cx };
+ visit::walk_item(&mut visitor, item, ());
+ }
+ _ => {}
+ }
+}
+
+pub fn check_unused_attribute(cx: &Context, attr: &ast::Attribute) {
+ static ATTRIBUTE_WHITELIST: &'static [&'static str] = &'static [
+ // FIXME: #14408 whitelist docs since rustdoc looks at them
+ "doc",
+
+ // FIXME: #14406 these are processed in trans, which happens after the
+ // lint pass
+ "address_insignificant",
+ "cold",
+ "inline",
+ "link",
+ "link_name",
+ "link_section",
+ "no_builtins",
+ "no_mangle",
+ "no_split_stack",
+ "packed",
+ "static_assert",
+ "thread_local",
+
+ // not used anywhere (!?) but apparently we want to keep them around
+ "comment",
+ "desc",
+ "license",
+
+ // FIXME: #14407 these are only looked at on-demand so we can't
+ // guarantee they'll have already been checked
+ "deprecated",
+ "experimental",
+ "frozen",
+ "locked",
+ "must_use",
+ "stable",
+ "unstable",
+ ];
+
+ static CRATE_ATTRS: &'static [&'static str] = &'static [
+ "crate_type",
+ "feature",
+ "no_start",
+ "no_main",
+ "no_std",
+ "crate_id",
+ "desc",
+ "comment",
+ "license",
+ "copyright",
+ "no_builtins",
+ ];
+
+ for &name in ATTRIBUTE_WHITELIST.iter() {
+ if attr.check_name(name) {
+ break;
+ }
+ }
+
+ if !attr::is_used(attr) {
+ cx.span_lint(lint::UnusedAttribute, attr.span, "unused attribute");
+ if CRATE_ATTRS.contains(&attr.name().get()) {
+ let msg = match attr.node.style {
+ ast::AttrOuter => "crate-level attribute should be an inner \
+ attribute: add an exclamation mark: #![foo]",
+ ast::AttrInner => "crate-level attribute should be in the \
+ root module",
+ };
+ cx.span_lint(lint::UnusedAttribute, attr.span, msg);
+ }
+ }
+}
+
+pub fn check_heap_expr(cx: &Context, e: &ast::Expr) {
+ let ty = ty::expr_ty(cx.tcx, e);
+ check_heap_type(cx, e.span, ty);
+}
+
+pub fn check_path_statement(cx: &Context, s: &ast::Stmt) {
+ match s.node {
+ ast::StmtSemi(expr, _) => {
+ match expr.node {
+ ast::ExprPath(_) => {
+ cx.span_lint(lint::PathStatement,
+ s.span,
+ "path statement with no effect");
+ }
+ _ => {}
+ }
+ }
+ _ => ()
+ }
+}
+
+pub fn check_unused_result(cx: &Context, s: &ast::Stmt) {
+ let expr = match s.node {
+ ast::StmtSemi(expr, _) => expr,
+ _ => return
+ };
+ let t = ty::expr_ty(cx.tcx, expr);
+ match ty::get(t).sty {
+ ty::ty_nil | ty::ty_bot | ty::ty_bool => return,
+ _ => {}
+ }
+ match expr.node {
+ ast::ExprRet(..) => return,
+ _ => {}
+ }
+
+ let t = ty::expr_ty(cx.tcx, expr);
+ let mut warned = false;
+ match ty::get(t).sty {
+ ty::ty_struct(did, _) |
+ ty::ty_enum(did, _) => {
+ if ast_util::is_local(did) {
+ match cx.tcx.map.get(did.node) {
+ ast_map::NodeItem(it) => {
+ if attr::contains_name(it.attrs.as_slice(),
+ "must_use") {
+ cx.span_lint(lint::UnusedMustUse, s.span,
+ "unused result which must be used");
+ warned = true;
+ }
+ }
+ _ => {}
+ }
+ } else {
+ csearch::get_item_attrs(&cx.tcx.sess.cstore, did, |attrs| {
+ if attr::contains_name(attrs.as_slice(), "must_use") {
+ cx.span_lint(lint::UnusedMustUse, s.span,
+ "unused result which must be used");
+ warned = true;
+ }
+ });
+ }
+ }
+ _ => {}
+ }
+ if !warned {
+ cx.span_lint(lint::UnusedResult, s.span, "unused result");
+ }
+}
+
+pub fn check_deprecated_owned_vector(cx: &Context, e: &ast::Expr) {
+ let t = ty::expr_ty(cx.tcx, e);
+ match ty::get(t).sty {
+ ty::ty_uniq(t) => match ty::get(t).sty {
+ ty::ty_vec(_, None) => {
+ cx.span_lint(lint::DeprecatedOwnedVector, e.span,
+ "use of deprecated `~[]` vector; replaced by `std::vec::Vec`")
+ }
+ _ => {}
+ },
+ _ => {}
+ }
+}
+
+pub fn check_item_non_camel_case_types(cx: &Context, it: &ast::Item) {
+ fn is_camel_case(ident: ast::Ident) -> bool {
+ let ident = token::get_ident(ident);
+ assert!(!ident.get().is_empty());
+ let ident = ident.get().trim_chars('_');
+
+ // start with a non-lowercase letter rather than non-uppercase
+ // ones (some scripts don't have a concept of upper/lowercase)
+ !ident.char_at(0).is_lowercase() && !ident.contains_char('_')
+ }
+
+ fn to_camel_case(s: &str) -> String {
+ s.split('_').flat_map(|word| word.chars().enumerate().map(|(i, c)|
+ if i == 0 { c.to_uppercase() }
+ else { c }
+ )).collect()
+ }
+
+ fn check_case(cx: &Context, sort: &str, ident: ast::Ident, span: Span) {
+ let s = token::get_ident(ident);
+
+ if !is_camel_case(ident) {
+ cx.span_lint(lint::
+ NonCamelCaseTypes, span,
+ format!("{} `{}` should have a camel case name such as `{}`",
+ sort, s, to_camel_case(s.get())).as_slice());
+ }
+ }
+
+ match it.node {
+ ast::ItemTy(..) | ast::ItemStruct(..) => {
+ check_case(cx, "type", it.ident, it.span)
+ }
+ ast::ItemTrait(..) => {
+ check_case(cx, "trait", it.ident, it.span)
+ }
+ ast::ItemEnum(ref enum_definition, _) => {
+ check_case(cx, "type", it.ident, it.span);
+ for variant in enum_definition.variants.iter() {
+ check_case(cx, "variant", variant.node.name, variant.span);
+ }
+ }
+ _ => ()
+ }
+}
+
+pub fn check_snake_case(cx: &Context, sort: &str, ident: ast::Ident, span: Span) {
+ fn is_snake_case(ident: ast::Ident) -> bool {
+ let ident = token::get_ident(ident);
+ assert!(!ident.get().is_empty());
+ let ident = ident.get().trim_chars('_');
+
+ let mut allow_underscore = true;
+ ident.chars().all(|c| {
+ allow_underscore = match c {
+ c if c.is_lowercase() || c.is_digit() => true,
+ '_' if allow_underscore => false,
+ _ => return false,
+ };
+ true
+ })
+ }
+
+ fn to_snake_case(str: &str) -> String {
+ let mut words = vec![];
+ for s in str.split('_') {
+ let mut buf = String::new();
+ if s.is_empty() { continue; }
+ for ch in s.chars() {
+ if !buf.is_empty() && ch.is_uppercase() {
+ words.push(buf);
+ buf = String::new();
+ }
+ buf.push_char(ch.to_lowercase());
+ }
+ words.push(buf);
+ }
+ words.connect("_")
+ }
+
+ let s = token::get_ident(ident);
+
+ if !is_snake_case(ident) {
+ cx.span_lint(lint::NonSnakeCaseFunctions, span,
+ format!("{} `{}` should have a snake case name such as `{}`",
+ sort, s, to_snake_case(s.get())).as_slice());
+ }
+}
+
+pub fn check_item_non_uppercase_statics(cx: &Context, it: &ast::Item) {
+ match it.node {
+ // only check static constants
+ ast::ItemStatic(_, ast::MutImmutable, _) => {
+ let s = token::get_ident(it.ident);
+ // check for lowercase letters rather than non-uppercase
+ // ones (some scripts don't have a concept of
+ // upper/lowercase)
+ if s.get().chars().any(|c| c.is_lowercase()) {
+ cx.span_lint(lint::NonUppercaseStatics, it.span,
+ format!("static constant `{}` should have an uppercase name \
+ such as `{}`", s.get(),
+ s.get().chars().map(|c| c.to_uppercase())
+ .collect::<String>().as_slice()).as_slice());
+ }
+ }
+ _ => {}
+ }
+}
+
+pub fn check_pat_non_uppercase_statics(cx: &Context, p: &ast::Pat) {
+ // Lint for constants that look like binding identifiers (#7526)
+ match (&p.node, cx.tcx.def_map.borrow().find(&p.id)) {
+ (&ast::PatIdent(_, ref path, _), Some(&def::DefStatic(_, false))) => {
+ // last identifier alone is right choice for this lint.
+ let ident = path.segments.last().unwrap().identifier;
+ let s = token::get_ident(ident);
+ if s.get().chars().any(|c| c.is_lowercase()) {
+ cx.span_lint(lint::NonUppercasePatternStatics, path.span,
+ format!("static constant in pattern `{}` should have an uppercase \
+ name such as `{}`", s.get(),
+ s.get().chars().map(|c| c.to_uppercase())
+ .collect::<String>().as_slice()).as_slice());
+ }
+ }
+ _ => {}
+ }
+}
+
+pub fn check_pat_uppercase_variable(cx: &Context, p: &ast::Pat) {
+ match &p.node {
+ &ast::PatIdent(_, ref path, _) => {
+ match cx.tcx.def_map.borrow().find(&p.id) {
+ Some(&def::DefLocal(_, _)) | Some(&def::DefBinding(_, _)) |
+ Some(&def::DefArg(_, _)) => {
+ // last identifier alone is right choice for this lint.
+ let ident = path.segments.last().unwrap().identifier;
+ let s = token::get_ident(ident);
+ if s.get().len() > 0 && s.get().char_at(0).is_uppercase() {
+ cx.span_lint(lint::
+ UppercaseVariables,
+ path.span,
+ "variable names should start with a lowercase character");
+ }
+ }
+ _ => {}
+ }
+ }
+ _ => {}
+ }
+}
+
+pub fn check_struct_uppercase_variable(cx: &Context, s: &ast::StructDef) {
+ for sf in s.fields.iter() {
+ match sf.node {
+ ast::StructField_ { kind: ast::NamedField(ident, _), .. } => {
+ let s = token::get_ident(ident);
+ if s.get().char_at(0).is_uppercase() {
+ cx.span_lint(lint::
+ UppercaseVariables,
+ sf.span,
+ "structure field names should start with a lowercase character");
+ }
+ }
+ _ => {}
+ }
+ }
+}
+
+pub fn check_unnecessary_parens_core(cx: &Context, value: &ast::Expr, msg: &str) {
+ match value.node {
+ ast::ExprParen(_) => {
+ cx.span_lint(lint::UnnecessaryParens, value.span,
+ format!("unnecessary parentheses around {}",
+ msg).as_slice())
+ }
+ _ => {}
+ }
+}
+
+pub fn check_unnecessary_parens_expr(cx: &Context, e: &ast::Expr) {
+ let (value, msg) = match e.node {
+ ast::ExprIf(cond, _, _) => (cond, "`if` condition"),
+ ast::ExprWhile(cond, _) => (cond, "`while` condition"),
+ ast::ExprMatch(head, _) => (head, "`match` head expression"),
+ ast::ExprRet(Some(value)) => (value, "`return` value"),
+ ast::ExprAssign(_, value) => (value, "assigned value"),
+ ast::ExprAssignOp(_, _, value) => (value, "assigned value"),
+ _ => return
+ };
+ check_unnecessary_parens_core(cx, value, msg);
+}
+
+pub fn check_unnecessary_parens_stmt(cx: &Context, s: &ast::Stmt) {
+ let (value, msg) = match s.node {
+ ast::StmtDecl(decl, _) => match decl.node {
+ ast::DeclLocal(local) => match local.init {
+ Some(value) => (value, "assigned value"),
+ None => return
+ },
+ _ => return
+ },
+ _ => return
+ };
+ check_unnecessary_parens_core(cx, value, msg);
+}
+
+pub fn check_unused_unsafe(cx: &Context, e: &ast::Expr) {
+ match e.node {
+ // Don't warn about generated blocks, that'll just pollute the output.
+ ast::ExprBlock(ref blk) => {
+ if blk.rules == ast::UnsafeBlock(ast::UserProvided) &&
+ !cx.tcx.used_unsafe.borrow().contains(&blk.id) {
+ cx.span_lint(lint::UnusedUnsafe, blk.span,
+ "unnecessary `unsafe` block");
+ }
+ }
+ _ => ()
+ }
+}
+
+pub fn check_unsafe_block(cx: &Context, e: &ast::Expr) {
+ match e.node {
+ // Don't warn about generated blocks, that'll just pollute the output.
+ ast::ExprBlock(ref blk) if blk.rules == ast::UnsafeBlock(ast::UserProvided) => {
+ cx.span_lint(lint::UnsafeBlock, blk.span, "usage of an `unsafe` block");
+ }
+ _ => ()
+ }
+}
+
+pub fn check_unused_mut_pat(cx: &Context, pats: &[@ast::Pat]) {
+ // collect all mutable pattern and group their NodeIDs by their Identifier to
+ // avoid false warnings in match arms with multiple patterns
+ let mut mutables = HashMap::new();
+ for &p in pats.iter() {
+ pat_util::pat_bindings(&cx.tcx.def_map, p, |mode, id, _, path| {
+ match mode {
+ ast::BindByValue(ast::MutMutable) => {
+ if path.segments.len() != 1 {
+ cx.tcx.sess.span_bug(p.span,
+ "mutable binding that doesn't consist \
+ of exactly one segment");
+ }
+ let ident = path.segments.get(0).identifier;
+ if !token::get_ident(ident).get().starts_with("_") {
+ mutables.insert_or_update_with(ident.name as uint, vec!(id), |_, old| {
+ old.push(id);
+ });
+ }
+ }
+ _ => {
+ }
+ }
+ });
+ }
+
+ let used_mutables = cx.tcx.used_mut_nodes.borrow();
+ for (_, v) in mutables.iter() {
+ if !v.iter().any(|e| used_mutables.contains(e)) {
+ cx.span_lint(lint::UnusedMut, cx.tcx.map.span(*v.get(0)),
+ "variable does not need to be mutable");
+ }
+ }
+}
+
+enum Allocation {
+ VectorAllocation,
+ BoxAllocation
+}
+
+pub fn check_unnecessary_allocation(cx: &Context, e: &ast::Expr) {
+ // Warn if string and vector literals with sigils, or boxing expressions,
+ // are immediately borrowed.
+ let allocation = match e.node {
+ ast::ExprVstore(e2, ast::ExprVstoreUniq) => {
+ match e2.node {
+ ast::ExprLit(lit) if ast_util::lit_is_str(lit) => {
+ VectorAllocation
+ }
+ ast::ExprVec(..) => VectorAllocation,
+ _ => return
+ }
+ }
+ ast::ExprUnary(ast::UnUniq, _) |
+ ast::ExprUnary(ast::UnBox, _) => BoxAllocation,
+
+ _ => return
+ };
+
+ let report = |msg| {
+ cx.span_lint(lint::UnnecessaryAllocation, e.span, msg);
+ };
+
+ match cx.tcx.adjustments.borrow().find(&e.id) {
+ Some(adjustment) => {
+ match *adjustment {
+ ty::AutoDerefRef(ty::AutoDerefRef { autoref, .. }) => {
+ match (allocation, autoref) {
+ (VectorAllocation, Some(ty::AutoBorrowVec(..))) => {
+ report("unnecessary allocation, the sigil can be \
+ removed");
+ }
+ (BoxAllocation,
+ Some(ty::AutoPtr(_, ast::MutImmutable))) => {
+ report("unnecessary allocation, use & instead");
+ }
+ (BoxAllocation,
+ Some(ty::AutoPtr(_, ast::MutMutable))) => {
+ report("unnecessary allocation, use &mut \
+ instead");
+ }
+ _ => ()
+ }
+ }
+ _ => {}
+ }
+ }
+
+ _ => ()
+ }
+}
+
+pub fn check_missing_doc_attrs(cx: &Context,
+ id: Option<ast::NodeId>,
+ 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.tcx.sess.opts.test { return }
+
+ // `#[doc(hidden)]` disables missing_doc check.
+ if cx.is_doc_hidden { return }
+
+ // Only check publicly-visible items, using the result from the privacy pass. It's an option so
+ // the crate root can also use this function (it doesn't have a NodeId).
+ match id {
+ Some(ref id) if !cx.exported_items.contains(id) => return,
+ _ => ()
+ }
+
+ let has_doc = attrs.iter().any(|a| {
+ match a.node.value.node {
+ ast::MetaNameValue(ref name, _) if name.equiv(&("doc")) => true,
+ _ => false
+ }
+ });
+ if !has_doc {
+ cx.span_lint(lint::MissingDoc,
+ sp,
+ format!("missing documentation for {}",
+ desc).as_slice());
+ }
+}
+
+pub fn check_missing_doc_item(cx: &Context, it: &ast::Item) {
+ let desc = match it.node {
+ ast::ItemFn(..) => "a function",
+ ast::ItemMod(..) => "a module",
+ ast::ItemEnum(..) => "an enum",
+ ast::ItemStruct(..) => "a struct",
+ ast::ItemTrait(..) => "a trait",
+ _ => return
+ };
+ check_missing_doc_attrs(cx,
+ Some(it.id),
+ it.attrs.as_slice(),
+ it.span,
+ desc);
+}
+
+pub fn check_missing_doc_method(cx: &Context, m: &ast::Method) {
+ // If the method is an impl for a trait, don't doc.
+ if lint::method_context(cx, m) == lint::TraitImpl { return; }
+
+ // Otherwise, doc according to privacy. This will also check
+ // doc for default methods defined on traits.
+ check_missing_doc_attrs(cx,
+ Some(m.id),
+ m.attrs.as_slice(),
+ m.span,
+ "a method");
+}
+
+pub fn check_missing_doc_ty_method(cx: &Context, tm: &ast::TypeMethod) {
+ check_missing_doc_attrs(cx,
+ Some(tm.id),
+ tm.attrs.as_slice(),
+ tm.span,
+ "a type method");
+}
+
+pub fn check_missing_doc_struct_field(cx: &Context, sf: &ast::StructField) {
+ match sf.node.kind {
+ ast::NamedField(_, vis) if vis == ast::Public =>
+ check_missing_doc_attrs(cx,
+ Some(cx.cur_struct_def_id),
+ sf.node.attrs.as_slice(),
+ sf.span,
+ "a struct field"),
+ _ => {}
+ }
+}
+
+pub fn check_missing_doc_variant(cx: &Context, v: &ast::Variant) {
+ check_missing_doc_attrs(cx,
+ Some(v.node.id),
+ v.node.attrs.as_slice(),
+ v.span,
+ "a variant");
+}
+
+/// Checks for use of items with #[deprecated], #[experimental] and
+/// #[unstable] (or none of them) attributes.
+pub fn check_stability(cx: &Context, e: &ast::Expr) {
+ let id = match e.node {
+ ast::ExprPath(..) | ast::ExprStruct(..) => {
+ match cx.tcx.def_map.borrow().find(&e.id) {
+ Some(&def) => def.def_id(),
+ None => return
+ }
+ }
+ ast::ExprMethodCall(..) => {
+ let method_call = typeck::MethodCall::expr(e.id);
+ match cx.tcx.method_map.borrow().find(&method_call) {
+ Some(method) => {
+ match method.origin {
+ typeck::MethodStatic(def_id) => {
+ // If this implements a trait method, get def_id
+ // of the method inside trait definition.
+ // Otherwise, use the current def_id (which refers
+ // to the method inside impl).
+ ty::trait_method_of_method(
+ cx.tcx, def_id).unwrap_or(def_id)
+ }
+ typeck::MethodParam(typeck::MethodParam {
+ trait_id: trait_id,
+ method_num: index,
+ ..
+ })
+ | typeck::MethodObject(typeck::MethodObject {
+ trait_id: trait_id,
+ method_num: index,
+ ..
+ }) => ty::trait_method(cx.tcx, trait_id, index).def_id
+ }
+ }
+ None => return
+ }
+ }
+ _ => return
+ };
+
+ let stability = if ast_util::is_local(id) {
+ // this crate
+ let s = cx.tcx.map.with_attrs(id.node, |attrs| {
+ attrs.map(|a| attr::find_stability(a.as_slice()))
+ });
+ match s {
+ Some(s) => s,
+
+ // no possibility of having attributes
+ // (e.g. it's a local variable), so just
+ // ignore it.
+ None => return
+ }
+ } else {
+ // cross-crate
+
+ let mut s = None;
+ // run through all the attributes and take the first
+ // stability one.
+ csearch::get_item_attrs(&cx.tcx.sess.cstore, id, |attrs| {
+ if s.is_none() {
+ s = attr::find_stability(attrs.as_slice())
+ }
+ });
+ s
+ };
+
+ let (lint, label) = match stability {
+ // no stability attributes == Unstable
+ None => (lint::Unstable, "unmarked"),
+ Some(attr::Stability { level: attr::Unstable, .. }) =>
+ (lint::Unstable, "unstable"),
+ Some(attr::Stability { level: attr::Experimental, .. }) =>
+ (lint::Experimental, "experimental"),
+ Some(attr::Stability { level: attr::Deprecated, .. }) =>
+ (lint::Deprecated, "deprecated"),
+ _ => return
+ };
+
+ let msg = match stability {
+ Some(attr::Stability { text: Some(ref s), .. }) => {
+ format!("use of {} item: {}", label, *s)
+ }
+ _ => format!("use of {} item", label)
+ };
+
+ cx.span_lint(lint, e.span, msg.as_slice());
+}
+
+pub fn check_enum_variant_sizes(cx: &mut Context, it: &ast::Item) {
+ match it.node {
+ ast::ItemEnum(..) => {
+ match cx.cur.find(&(lint::VariantSizeDifference as uint)) {
+ Some(&(lvl, src)) if lvl != lint::Allow => {
+ cx.node_levels.insert((it.id, lint::VariantSizeDifference), (lvl, src));
+ },
+ _ => { }
+ }
+ },
+ _ => { }
+ }
+}
#![allow(non_camel_case_types)]
use driver::session;
-use metadata::csearch;
use middle::dead::DEAD_CODE_LINT_STR;
-use middle::def;
-use middle::def::*;
-use middle::pat_util;
use middle::privacy;
-use middle::trans::adt; // for `adt::is_ffi_safe`
use middle::ty;
-use middle::typeck::astconv::{ast_ty_to_ty, AstConv};
+use middle::typeck::astconv::AstConv;
use middle::typeck::infer;
-use middle::typeck;
-use util::ppaux::{ty_to_str};
use util::nodemap::NodeSet;
-use std::cmp;
use std::collections::HashMap;
-use std::i16;
-use std::i32;
-use std::i64;
-use std::i8;
use std::rc::Rc;
use std::gc::Gc;
use std::to_str::ToStr;
-use std::u16;
-use std::u32;
-use std::u64;
-use std::u8;
use std::collections::SmallIntMap;
-use syntax::abi;
-use syntax::ast_map;
use syntax::ast_util::IdVisitingOperation;
use syntax::attr::AttrMetaMethods;
use syntax::attr;
use syntax::codemap::Span;
use syntax::parse::token::InternedString;
-use syntax::parse::token;
use syntax::visit::Visitor;
use syntax::{ast, ast_util, visit};
+mod builtin;
+
#[deriving(Clone, Show, PartialEq, PartialOrd, Eq, Ord, Hash)]
pub enum Lint {
CTypes,
false
}
-fn check_while_true_expr(cx: &Context, e: &ast::Expr) {
- match e.node {
- ast::ExprWhile(cond, _) => {
- match cond.node {
- ast::ExprLit(lit) => {
- match lit.node {
- ast::LitBool(true) => {
- cx.span_lint(WhileTrue,
- e.span,
- "denote infinite loops with loop \
- { ... }");
- }
- _ => {}
- }
- }
- _ => ()
- }
- }
- _ => ()
- }
-}
-impl<'a> AstConv for Context<'a>{
- fn tcx<'a>(&'a self) -> &'a ty::ctxt { self.tcx }
-
- fn get_item_ty(&self, id: ast::DefId) -> ty::Polytype {
- ty::lookup_item_type(self.tcx, id)
- }
-
- fn get_trait_def(&self, id: ast::DefId) -> Rc<ty::TraitDef> {
- ty::lookup_trait_def(self.tcx, id)
- }
-
- fn ty_infer(&self, _span: Span) -> ty::t {
- infer::new_infer_ctxt(self.tcx).next_ty_var()
- }
-}
-
-
-fn check_unused_casts(cx: &Context, e: &ast::Expr) {
- return match e.node {
- ast::ExprCast(expr, ty) => {
- let t_t = ast_ty_to_ty(cx, &infer::new_infer_ctxt(cx.tcx), &*ty);
- if ty::get(ty::expr_ty(cx.tcx, &*expr)).sty == ty::get(t_t).sty {
- cx.span_lint(UnnecessaryTypecast, ty.span,
- "unnecessary type cast");
- }
- }
- _ => ()
- };
-}
-
-fn check_type_limits(cx: &Context, e: &ast::Expr) {
- return match e.node {
- ast::ExprUnary(ast::UnNeg, ex) => {
- match ex.node {
- ast::ExprLit(lit) => {
- match lit.node {
- ast::LitUint(..) => {
- cx.span_lint(UnsignedNegate, e.span,
- "negation of unsigned int literal may be unintentional");
- },
- _ => ()
- }
- },
- _ => {
- let t = ty::expr_ty(cx.tcx, &*ex);
- match ty::get(t).sty {
- ty::ty_uint(_) => {
- cx.span_lint(UnsignedNegate, e.span,
- "negation of unsigned int variable may be unintentional");
- },
- _ => ()
- }
- }
- }
- },
- ast::ExprBinary(binop, l, r) => {
- if is_comparison(binop) && !check_limits(cx.tcx, binop, &*l, &*r) {
- cx.span_lint(TypeLimits, e.span,
- "comparison is useless due to type limits");
- }
- },
- ast::ExprLit(lit) => {
- match ty::get(ty::expr_ty(cx.tcx, e)).sty {
- ty::ty_int(t) => {
- let int_type = if t == ast::TyI {
- cx.tcx.sess.targ_cfg.int_type
- } else { t };
- let (min, max) = int_ty_range(int_type);
- let mut lit_val: i64 = match lit.node {
- ast::LitInt(v, _) => v,
- ast::LitUint(v, _) => v as i64,
- ast::LitIntUnsuffixed(v) => v,
- _ => fail!()
- };
- if cx.negated_expr_id == e.id {
- lit_val *= -1;
- }
- if lit_val < min || lit_val > max {
- cx.span_lint(TypeOverflow, e.span,
- "literal out of range for its type");
- }
- },
- ty::ty_uint(t) => {
- let uint_type = if t == ast::TyU {
- cx.tcx.sess.targ_cfg.uint_type
- } else { t };
- let (min, max) = uint_ty_range(uint_type);
- let lit_val: u64 = match lit.node {
- ast::LitByte(_v) => return, // _v is u8, within range by definition
- ast::LitInt(v, _) => v as u64,
- ast::LitUint(v, _) => v,
- ast::LitIntUnsuffixed(v) => v as u64,
- _ => fail!()
- };
- if lit_val < min || lit_val > max {
- cx.span_lint(TypeOverflow, e.span,
- "literal out of range for its type");
- }
- },
-
- _ => ()
- };
- },
- _ => ()
- };
-
- fn is_valid<T:cmp::PartialOrd>(binop: ast::BinOp, v: T,
- min: T, max: T) -> bool {
- match binop {
- ast::BiLt => v > min && v <= max,
- ast::BiLe => v >= min && v < max,
- ast::BiGt => v >= min && v < max,
- ast::BiGe => v > min && v <= max,
- ast::BiEq | ast::BiNe => v >= min && v <= max,
- _ => fail!()
- }
- }
-
- fn rev_binop(binop: ast::BinOp) -> ast::BinOp {
- match binop {
- ast::BiLt => ast::BiGt,
- ast::BiLe => ast::BiGe,
- ast::BiGt => ast::BiLt,
- ast::BiGe => ast::BiLe,
- _ => binop
- }
- }
-
- // for int & uint, be conservative with the warnings, so that the
- // warnings are consistent between 32- and 64-bit platforms
- fn int_ty_range(int_ty: ast::IntTy) -> (i64, i64) {
- match int_ty {
- ast::TyI => (i64::MIN, i64::MAX),
- ast::TyI8 => (i8::MIN as i64, i8::MAX as i64),
- ast::TyI16 => (i16::MIN as i64, i16::MAX as i64),
- ast::TyI32 => (i32::MIN as i64, i32::MAX as i64),
- ast::TyI64 => (i64::MIN, i64::MAX)
- }
- }
-
- fn uint_ty_range(uint_ty: ast::UintTy) -> (u64, u64) {
- match uint_ty {
- ast::TyU => (u64::MIN, u64::MAX),
- ast::TyU8 => (u8::MIN as u64, u8::MAX as u64),
- ast::TyU16 => (u16::MIN as u64, u16::MAX as u64),
- ast::TyU32 => (u32::MIN as u64, u32::MAX as u64),
- ast::TyU64 => (u64::MIN, u64::MAX)
- }
- }
-
- fn check_limits(tcx: &ty::ctxt, binop: ast::BinOp,
- l: &ast::Expr, r: &ast::Expr) -> bool {
- let (lit, expr, swap) = match (&l.node, &r.node) {
- (&ast::ExprLit(_), _) => (l, r, true),
- (_, &ast::ExprLit(_)) => (r, l, false),
- _ => return true
- };
- // Normalize the binop so that the literal is always on the RHS in
- // the comparison
- let norm_binop = if swap { rev_binop(binop) } else { binop };
- match ty::get(ty::expr_ty(tcx, expr)).sty {
- ty::ty_int(int_ty) => {
- let (min, max) = int_ty_range(int_ty);
- let lit_val: i64 = match lit.node {
- ast::ExprLit(li) => match li.node {
- ast::LitInt(v, _) => v,
- ast::LitUint(v, _) => v as i64,
- ast::LitIntUnsuffixed(v) => v,
- _ => return true
- },
- _ => fail!()
- };
- is_valid(norm_binop, lit_val, min, max)
- }
- ty::ty_uint(uint_ty) => {
- let (min, max): (u64, u64) = uint_ty_range(uint_ty);
- let lit_val: u64 = match lit.node {
- ast::ExprLit(li) => match li.node {
- ast::LitInt(v, _) => v as u64,
- ast::LitUint(v, _) => v,
- ast::LitIntUnsuffixed(v) => v as u64,
- _ => return true
- },
- _ => fail!()
- };
- is_valid(norm_binop, lit_val, min, max)
- }
- _ => true
- }
- }
-
- fn is_comparison(binop: ast::BinOp) -> bool {
- match binop {
- ast::BiEq | ast::BiLt | ast::BiLe |
- ast::BiNe | ast::BiGe | ast::BiGt => true,
- _ => false
- }
- }
-}
-
-fn check_item_ctypes(cx: &Context, it: &ast::Item) {
- fn check_ty(cx: &Context, ty: &ast::Ty) {
- match ty.node {
- ast::TyPath(_, _, id) => {
- match cx.tcx.def_map.borrow().get_copy(&id) {
- def::DefPrimTy(ast::TyInt(ast::TyI)) => {
- cx.span_lint(CTypes, ty.span,
- "found rust type `int` in foreign module, while \
- libc::c_int or libc::c_long should be used");
- }
- def::DefPrimTy(ast::TyUint(ast::TyU)) => {
- cx.span_lint(CTypes, ty.span,
- "found rust type `uint` in foreign module, while \
- libc::c_uint or libc::c_ulong should be used");
- }
- def::DefTy(def_id) => {
- if !adt::is_ffi_safe(cx.tcx, def_id) {
- cx.span_lint(CTypes, ty.span,
- "found enum type without foreign-function-safe \
- representation annotation in foreign module");
- // hmm... this message could be more helpful
- }
- }
- _ => ()
- }
- }
- ast::TyPtr(ref mt) => { check_ty(cx, &*mt.ty) }
- _ => {}
- }
- }
-
- fn check_foreign_fn(cx: &Context, decl: &ast::FnDecl) {
- for input in decl.inputs.iter() {
- check_ty(cx, &*input.ty);
- }
- check_ty(cx, &*decl.output)
- }
-
- match it.node {
- ast::ItemForeignMod(ref nmod) if nmod.abi != abi::RustIntrinsic => {
- for ni in nmod.items.iter() {
- match ni.node {
- ast::ForeignItemFn(decl, _) => check_foreign_fn(cx, &*decl),
- ast::ForeignItemStatic(t, _) => check_ty(cx, &*t)
- }
- }
- }
- _ => {/* nothing to do */ }
- }
-}
-
-fn check_heap_type(cx: &Context, span: Span, ty: ty::t) {
- let xs = [ManagedHeapMemory, OwnedHeapMemory, HeapMemory];
- for &lint in xs.iter() {
- if cx.get_level(lint) == Allow { continue }
-
- let mut n_box = 0;
- let mut n_uniq = 0;
- ty::fold_ty(cx.tcx, ty, |t| {
- match ty::get(t).sty {
- ty::ty_box(_) => {
- n_box += 1;
- }
- ty::ty_uniq(_) |
- ty::ty_closure(box ty::ClosureTy {
- store: ty::UniqTraitStore,
- ..
- }) => {
- n_uniq += 1;
- }
-
- _ => ()
- };
- t
- });
-
- if n_uniq > 0 && lint != ManagedHeapMemory {
- let s = ty_to_str(cx.tcx, ty);
- let m = format!("type uses owned (Box type) pointers: {}", s);
- cx.span_lint(lint, span, m.as_slice());
- }
-
- if n_box > 0 && lint != OwnedHeapMemory {
- let s = ty_to_str(cx.tcx, ty);
- let m = format!("type uses managed (@ type) pointers: {}", s);
- cx.span_lint(lint, span, m.as_slice());
- }
- }
-}
-
-fn check_heap_item(cx: &Context, it: &ast::Item) {
- match it.node {
- ast::ItemFn(..) |
- ast::ItemTy(..) |
- ast::ItemEnum(..) |
- ast::ItemStruct(..) => check_heap_type(cx, it.span,
- ty::node_id_to_type(cx.tcx,
- it.id)),
- _ => ()
- }
-
- // If it's a struct, we also have to check the fields' types
- match it.node {
- ast::ItemStruct(struct_def, _) => {
- for struct_field in struct_def.fields.iter() {
- check_heap_type(cx, struct_field.span,
- ty::node_id_to_type(cx.tcx,
- struct_field.node.id));
- }
- }
- _ => ()
- }
-}
-
-struct RawPtrDerivingVisitor<'a> {
- cx: &'a Context<'a>
-}
-
-impl<'a> Visitor<()> for RawPtrDerivingVisitor<'a> {
- fn visit_ty(&mut self, ty: &ast::Ty, _: ()) {
- static MSG: &'static str = "use of `#[deriving]` with a raw pointer";
- match ty.node {
- ast::TyPtr(..) => self.cx.span_lint(RawPointerDeriving, ty.span, MSG),
- _ => {}
- }
- visit::walk_ty(self, ty, ());
- }
- // explicit override to a no-op to reduce code bloat
- fn visit_expr(&mut self, _: &ast::Expr, _: ()) {}
- fn visit_block(&mut self, _: &ast::Block, _: ()) {}
-}
-
-fn check_raw_ptr_deriving(cx: &mut Context, item: &ast::Item) {
- if !attr::contains_name(item.attrs.as_slice(), "automatically_derived") {
- return
- }
- let did = match item.node {
- ast::ItemImpl(..) => {
- match ty::get(ty::node_id_to_type(cx.tcx, item.id)).sty {
- ty::ty_enum(did, _) => did,
- ty::ty_struct(did, _) => did,
- _ => return,
- }
- }
- _ => return,
- };
- if !ast_util::is_local(did) { return }
- let item = match cx.tcx.map.find(did.node) {
- Some(ast_map::NodeItem(item)) => item,
- _ => return,
- };
- if !cx.checked_raw_pointers.insert(item.id) { return }
- match item.node {
- ast::ItemStruct(..) | ast::ItemEnum(..) => {
- let mut visitor = RawPtrDerivingVisitor { cx: cx };
- visit::walk_item(&mut visitor, &*item, ());
- }
- _ => {}
- }
-}
-
-fn check_unused_attribute(cx: &Context, attr: &ast::Attribute) {
- static ATTRIBUTE_WHITELIST: &'static [&'static str] = &'static [
- // FIXME: #14408 whitelist docs since rustdoc looks at them
- "doc",
-
- // FIXME: #14406 these are processed in trans, which happens after the
- // lint pass
- "cold",
- "inline",
- "link",
- "link_name",
- "link_section",
- "no_builtins",
- "no_mangle",
- "no_split_stack",
- "packed",
- "static_assert",
- "thread_local",
-
- // not used anywhere (!?) but apparently we want to keep them around
- "comment",
- "desc",
- "license",
-
- // FIXME: #14407 these are only looked at on-demand so we can't
- // guarantee they'll have already been checked
- "deprecated",
- "experimental",
- "frozen",
- "locked",
- "must_use",
- "stable",
- "unstable",
- ];
-
- static CRATE_ATTRS: &'static [&'static str] = &'static [
- "crate_type",
- "feature",
- "no_start",
- "no_main",
- "no_std",
- "crate_id",
- "desc",
- "comment",
- "license",
- "copyright",
- "no_builtins",
- ];
-
- for &name in ATTRIBUTE_WHITELIST.iter() {
- if attr.check_name(name) {
- break;
- }
- }
-
- if !attr::is_used(attr) {
- cx.span_lint(UnusedAttribute, attr.span, "unused attribute");
- if CRATE_ATTRS.contains(&attr.name().get()) {
- let msg = match attr.node.style {
- ast::AttrOuter => "crate-level attribute should be an inner \
- attribute: add an exclamation mark: #![foo]",
- ast::AttrInner => "crate-level attribute should be in the \
- root module",
- };
- cx.span_lint(UnusedAttribute, attr.span, msg);
- }
- }
-}
-
-fn check_heap_expr(cx: &Context, e: &ast::Expr) {
- let ty = ty::expr_ty(cx.tcx, e);
- check_heap_type(cx, e.span, ty);
-}
-
-fn check_path_statement(cx: &Context, s: &ast::Stmt) {
- match s.node {
- ast::StmtSemi(expr, _) => {
- match expr.node {
- ast::ExprPath(_) => {
- cx.span_lint(PathStatement,
- s.span,
- "path statement with no effect");
- }
- _ => {}
- }
- }
- _ => ()
- }
-}
-
-fn check_unused_result(cx: &Context, s: &ast::Stmt) {
- let expr = match s.node {
- ast::StmtSemi(expr, _) => expr,
- _ => return
- };
- let t = ty::expr_ty(cx.tcx, &*expr);
- match ty::get(t).sty {
- ty::ty_nil | ty::ty_bot | ty::ty_bool => return,
- _ => {}
- }
- match expr.node {
- ast::ExprRet(..) => return,
- _ => {}
- }
-
- let t = ty::expr_ty(cx.tcx, &*expr);
- let mut warned = false;
- match ty::get(t).sty {
- ty::ty_struct(did, _) |
- ty::ty_enum(did, _) => {
- if ast_util::is_local(did) {
- match cx.tcx.map.get(did.node) {
- ast_map::NodeItem(it) => {
- if attr::contains_name(it.attrs.as_slice(),
- "must_use") {
- cx.span_lint(UnusedMustUse, s.span,
- "unused result which must be used");
- warned = true;
- }
- }
- _ => {}
- }
- } else {
- csearch::get_item_attrs(&cx.tcx.sess.cstore, did, |attrs| {
- if attr::contains_name(attrs.as_slice(), "must_use") {
- cx.span_lint(UnusedMustUse, s.span,
- "unused result which must be used");
- warned = true;
- }
- });
- }
- }
- _ => {}
- }
- if !warned {
- cx.span_lint(UnusedResult, s.span, "unused result");
- }
-}
-
-fn check_item_non_camel_case_types(cx: &Context, it: &ast::Item) {
- fn is_camel_case(ident: ast::Ident) -> bool {
- let ident = token::get_ident(ident);
- assert!(!ident.get().is_empty());
- let ident = ident.get().trim_chars('_');
-
- // start with a non-lowercase letter rather than non-uppercase
- // ones (some scripts don't have a concept of upper/lowercase)
- !ident.char_at(0).is_lowercase() && !ident.contains_char('_')
- }
-
- fn to_camel_case(s: &str) -> String {
- s.split('_').flat_map(|word| word.chars().enumerate().map(|(i, c)|
- if i == 0 { c.to_uppercase() }
- else { c }
- )).collect()
- }
-
- fn check_case(cx: &Context, sort: &str, ident: ast::Ident, span: Span) {
- let s = token::get_ident(ident);
-
- if !is_camel_case(ident) {
- cx.span_lint(
- NonCamelCaseTypes, span,
- format!("{} `{}` should have a camel case name such as `{}`",
- sort, s, to_camel_case(s.get())).as_slice());
- }
- }
-
- match it.node {
- ast::ItemTy(..) | ast::ItemStruct(..) => {
- check_case(cx, "type", it.ident, it.span)
- }
- ast::ItemTrait(..) => {
- check_case(cx, "trait", it.ident, it.span)
- }
- ast::ItemEnum(ref enum_definition, _) => {
- check_case(cx, "type", it.ident, it.span);
- for variant in enum_definition.variants.iter() {
- check_case(cx, "variant", variant.node.name, variant.span);
- }
- }
- _ => ()
- }
-}
-
-fn check_snake_case(cx: &Context, sort: &str, ident: ast::Ident, span: Span) {
- fn is_snake_case(ident: ast::Ident) -> bool {
- let ident = token::get_ident(ident);
- assert!(!ident.get().is_empty());
- let ident = ident.get().trim_chars('_');
-
- let mut allow_underscore = true;
- ident.chars().all(|c| {
- allow_underscore = match c {
- c if c.is_lowercase() || c.is_digit() => true,
- '_' if allow_underscore => false,
- _ => return false,
- };
- true
- })
- }
-
- fn to_snake_case(str: &str) -> String {
- let mut words = vec![];
- for s in str.split('_') {
- let mut buf = String::new();
- if s.is_empty() { continue; }
- for ch in s.chars() {
- if !buf.is_empty() && ch.is_uppercase() {
- words.push(buf);
- buf = String::new();
- }
- buf.push_char(ch.to_lowercase());
- }
- words.push(buf);
- }
- words.connect("_")
- }
-
- let s = token::get_ident(ident);
-
- if !is_snake_case(ident) {
- cx.span_lint(NonSnakeCaseFunctions, span,
- format!("{} `{}` should have a snake case name such as `{}`",
- sort, s, to_snake_case(s.get())).as_slice());
- }
-}
-
-fn check_item_non_uppercase_statics(cx: &Context, it: &ast::Item) {
- match it.node {
- // only check static constants
- ast::ItemStatic(_, ast::MutImmutable, _) => {
- let s = token::get_ident(it.ident);
- // check for lowercase letters rather than non-uppercase
- // ones (some scripts don't have a concept of
- // upper/lowercase)
- if s.get().chars().any(|c| c.is_lowercase()) {
- cx.span_lint(NonUppercaseStatics, it.span,
- format!("static constant `{}` should have an uppercase name \
- such as `{}`", s.get(),
- s.get().chars().map(|c| c.to_uppercase())
- .collect::<String>().as_slice()).as_slice());
- }
- }
- _ => {}
- }
-}
-
-fn check_pat_non_uppercase_statics(cx: &Context, p: &ast::Pat) {
- // Lint for constants that look like binding identifiers (#7526)
- match (&p.node, cx.tcx.def_map.borrow().find(&p.id)) {
- (&ast::PatIdent(_, ref path, _), Some(&def::DefStatic(_, false))) => {
- // last identifier alone is right choice for this lint.
- let ident = path.segments.last().unwrap().identifier;
- let s = token::get_ident(ident);
- if s.get().chars().any(|c| c.is_lowercase()) {
- cx.span_lint(NonUppercasePatternStatics, path.span,
- format!("static constant in pattern `{}` should have an uppercase \
- name such as `{}`", s.get(),
- s.get().chars().map(|c| c.to_uppercase())
- .collect::<String>().as_slice()).as_slice());
- }
- }
- _ => {}
- }
-}
-
-fn check_pat_uppercase_variable(cx: &Context, p: &ast::Pat) {
- match &p.node {
- &ast::PatIdent(_, ref path, _) => {
- match cx.tcx.def_map.borrow().find(&p.id) {
- Some(&def::DefLocal(_, _)) | Some(&def::DefBinding(_, _)) |
- Some(&def::DefArg(_, _)) => {
- // last identifier alone is right choice for this lint.
- let ident = path.segments.last().unwrap().identifier;
- let s = token::get_ident(ident);
- if s.get().len() > 0 && s.get().char_at(0).is_uppercase() {
- cx.span_lint(
- UppercaseVariables,
- path.span,
- "variable names should start with a lowercase character");
- }
- }
- _ => {}
- }
- }
- _ => {}
- }
-}
-
-fn check_struct_uppercase_variable(cx: &Context, s: &ast::StructDef) {
- for sf in s.fields.iter() {
- match sf.node {
- ast::StructField_ { kind: ast::NamedField(ident, _), .. } => {
- let s = token::get_ident(ident);
- if s.get().char_at(0).is_uppercase() {
- cx.span_lint(
- UppercaseVariables,
- sf.span,
- "structure field names should start with a lowercase character");
- }
- }
- _ => {}
- }
- }
-}
-
-fn check_unnecessary_parens_core(cx: &Context, value: &ast::Expr, msg: &str) {
- match value.node {
- ast::ExprParen(_) => {
- cx.span_lint(UnnecessaryParens, value.span,
- format!("unnecessary parentheses around {}",
- msg).as_slice())
- }
- _ => {}
- }
-}
-
-fn check_unnecessary_parens_expr(cx: &Context, e: &ast::Expr) {
- let (value, msg) = match e.node {
- ast::ExprIf(cond, _, _) => (cond, "`if` condition"),
- ast::ExprWhile(cond, _) => (cond, "`while` condition"),
- ast::ExprMatch(head, _) => (head, "`match` head expression"),
- ast::ExprRet(Some(value)) => (value, "`return` value"),
- ast::ExprAssign(_, value) => (value, "assigned value"),
- ast::ExprAssignOp(_, _, value) => (value, "assigned value"),
- _ => return
- };
- check_unnecessary_parens_core(cx, &*value, msg);
-}
-
-fn check_unnecessary_parens_stmt(cx: &Context, s: &ast::Stmt) {
- let (value, msg) = match s.node {
- ast::StmtDecl(decl, _) => match decl.node {
- ast::DeclLocal(local) => match local.init {
- Some(value) => (value, "assigned value"),
- None => return
- },
- _ => return
- },
- _ => return
- };
- check_unnecessary_parens_core(cx, &*value, msg);
-}
-
-fn check_unused_unsafe(cx: &Context, e: &ast::Expr) {
- match e.node {
- // Don't warn about generated blocks, that'll just pollute the output.
- ast::ExprBlock(ref blk) => {
- if blk.rules == ast::UnsafeBlock(ast::UserProvided) &&
- !cx.tcx.used_unsafe.borrow().contains(&blk.id) {
- cx.span_lint(UnusedUnsafe, blk.span,
- "unnecessary `unsafe` block");
- }
- }
- _ => ()
- }
-}
-
-fn check_unsafe_block(cx: &Context, e: &ast::Expr) {
- match e.node {
- // Don't warn about generated blocks, that'll just pollute the output.
- ast::ExprBlock(ref blk) if blk.rules == ast::UnsafeBlock(ast::UserProvided) => {
- cx.span_lint(UnsafeBlock, blk.span, "usage of an `unsafe` block");
- }
- _ => ()
- }
-}
-
-fn check_unused_mut_pat(cx: &Context, pats: &[Gc<ast::Pat>]) {
- // collect all mutable pattern and group their NodeIDs by their Identifier to
- // avoid false warnings in match arms with multiple patterns
- let mut mutables = HashMap::new();
- for &p in pats.iter() {
- pat_util::pat_bindings(&cx.tcx.def_map, &*p, |mode, id, _, path| {
- match mode {
- ast::BindByValue(ast::MutMutable) => {
- if path.segments.len() != 1 {
- cx.tcx.sess.span_bug(p.span,
- "mutable binding that doesn't consist \
- of exactly one segment");
- }
- let ident = path.segments.get(0).identifier;
- if !token::get_ident(ident).get().starts_with("_") {
- mutables.insert_or_update_with(ident.name as uint, vec!(id), |_, old| {
- old.push(id);
- });
- }
- }
- _ => {
- }
- }
- });
- }
-
- let used_mutables = cx.tcx.used_mut_nodes.borrow();
- for (_, v) in mutables.iter() {
- if !v.iter().any(|e| used_mutables.contains(e)) {
- cx.span_lint(UnusedMut, cx.tcx.map.span(*v.get(0)),
- "variable does not need to be mutable");
- }
- }
-}
-
-enum Allocation {
- VectorAllocation,
- BoxAllocation
-}
-
-fn check_unnecessary_allocation(cx: &Context, e: &ast::Expr) {
- // Warn if string and vector literals with sigils, or boxing expressions,
- // are immediately borrowed.
- let allocation = match e.node {
- ast::ExprVstore(e2, ast::ExprVstoreUniq) => {
- match e2.node {
- ast::ExprLit(lit) if ast_util::lit_is_str(lit) => {
- VectorAllocation
- }
- ast::ExprVec(..) => VectorAllocation,
- _ => return
- }
- }
- ast::ExprUnary(ast::UnUniq, _) |
- ast::ExprUnary(ast::UnBox, _) => BoxAllocation,
-
- _ => return
- };
-
- let report = |msg| {
- cx.span_lint(UnnecessaryAllocation, e.span, msg);
- };
-
- match cx.tcx.adjustments.borrow().find(&e.id) {
- Some(adjustment) => {
- match *adjustment {
- ty::AutoDerefRef(ty::AutoDerefRef { autoref, .. }) => {
- match (allocation, autoref) {
- (VectorAllocation, Some(ty::AutoBorrowVec(..))) => {
- report("unnecessary allocation, the sigil can be \
- removed");
- }
- (BoxAllocation,
- Some(ty::AutoPtr(_, ast::MutImmutable))) => {
- report("unnecessary allocation, use & instead");
- }
- (BoxAllocation,
- Some(ty::AutoPtr(_, ast::MutMutable))) => {
- report("unnecessary allocation, use &mut \
- instead");
- }
- _ => ()
- }
- }
- _ => {}
- }
- }
-
- _ => ()
- }
-}
-
-fn check_missing_doc_attrs(cx: &Context,
- id: Option<ast::NodeId>,
- 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.tcx.sess.opts.test { return }
-
- // `#[doc(hidden)]` disables missing_doc check.
- if cx.is_doc_hidden { return }
-
- // Only check publicly-visible items, using the result from the privacy pass. It's an option so
- // the crate root can also use this function (it doesn't have a NodeId).
- match id {
- Some(ref id) if !cx.exported_items.contains(id) => return,
- _ => ()
- }
-
- let has_doc = attrs.iter().any(|a| {
- match a.node.value.node {
- ast::MetaNameValue(ref name, _) if name.equiv(&("doc")) => true,
- _ => false
- }
- });
- if !has_doc {
- cx.span_lint(MissingDoc,
- sp,
- format!("missing documentation for {}",
- desc).as_slice());
- }
-}
-
-fn check_missing_doc_item(cx: &Context, it: &ast::Item) {
- let desc = match it.node {
- ast::ItemFn(..) => "a function",
- ast::ItemMod(..) => "a module",
- ast::ItemEnum(..) => "an enum",
- ast::ItemStruct(..) => "a struct",
- ast::ItemTrait(..) => "a trait",
- _ => return
- };
- check_missing_doc_attrs(cx,
- Some(it.id),
- it.attrs.as_slice(),
- it.span,
- desc);
-}
-
#[deriving(PartialEq)]
enum MethodContext {
TraitDefaultImpl,
PlainImpl
}
-fn check_missing_doc_method(cx: &Context, m: &ast::Method) {
- // If the method is an impl for a trait, don't doc.
- if method_context(cx, m) == TraitImpl { return; }
-
- // Otherwise, doc according to privacy. This will also check
- // doc for default methods defined on traits.
- check_missing_doc_attrs(cx,
- Some(m.id),
- m.attrs.as_slice(),
- m.span,
- "a method");
-}
-
fn method_context(cx: &Context, m: &ast::Method) -> MethodContext {
let did = ast::DefId {
krate: ast::LOCAL_CRATE,
}
}
-fn check_missing_doc_ty_method(cx: &Context, tm: &ast::TypeMethod) {
- check_missing_doc_attrs(cx,
- Some(tm.id),
- tm.attrs.as_slice(),
- tm.span,
- "a type method");
-}
+impl<'a> AstConv for Context<'a>{
+ fn tcx<'a>(&'a self) -> &'a ty::ctxt { self.tcx }
-fn check_missing_doc_struct_field(cx: &Context, sf: &ast::StructField) {
- match sf.node.kind {
- ast::NamedField(_, vis) if vis == ast::Public =>
- check_missing_doc_attrs(cx,
- Some(cx.cur_struct_def_id),
- sf.node.attrs.as_slice(),
- sf.span,
- "a struct field"),
- _ => {}
+ fn get_item_ty(&self, id: ast::DefId) -> ty::ty_param_bounds_and_ty {
+ ty::lookup_item_type(self.tcx, id)
}
-}
-
-fn check_missing_doc_variant(cx: &Context, v: &ast::Variant) {
- check_missing_doc_attrs(cx,
- Some(v.node.id),
- v.node.attrs.as_slice(),
- v.span,
- "a variant");
-}
-
-/// Checks for use of items with #[deprecated], #[experimental] and
-/// #[unstable] (or none of them) attributes.
-fn check_stability(cx: &Context, e: &ast::Expr) {
- let tcx = cx.tcx;
-
- let id = match e.node {
- ast::ExprPath(..) | ast::ExprStruct(..) => {
- match cx.tcx.def_map.borrow().find(&e.id) {
- Some(&def) => def.def_id(),
- None => return
- }
- }
- ast::ExprMethodCall(..) => {
- let method_call = typeck::MethodCall::expr(e.id);
- match tcx.method_map.borrow().find(&method_call) {
- Some(method) => {
- match method.origin {
- typeck::MethodStatic(def_id) => {
- // If this implements a trait method, get def_id
- // of the method inside trait definition.
- // Otherwise, use the current def_id (which refers
- // to the method inside impl).
- ty::trait_method_of_method(cx.tcx, def_id)
- .unwrap_or(def_id)
- }
- typeck::MethodParam(typeck::MethodParam {
- trait_id: trait_id,
- method_num: index,
- ..
- })
- | typeck::MethodObject(typeck::MethodObject {
- trait_id: trait_id,
- method_num: index,
- ..
- }) => ty::trait_method(cx.tcx, trait_id, index).def_id
- }
- }
- None => return
- }
- }
- _ => return
- };
-
- // stability attributes are promises made across crates; do not
- // check anything for crate-local usage.
- if ast_util::is_local(id) { return }
-
- let stability = tcx.stability.borrow_mut().lookup(&tcx.sess.cstore, id);
-
- let (lint, label) = match stability {
- // no stability attributes == Unstable
- None => (Unstable, "unmarked"),
- Some(attr::Stability { level: attr::Unstable, .. }) =>
- (Unstable, "unstable"),
- Some(attr::Stability { level: attr::Experimental, .. }) =>
- (Experimental, "experimental"),
- Some(attr::Stability { level: attr::Deprecated, .. }) =>
- (Deprecated, "deprecated"),
- _ => return
- };
- let msg = match stability {
- Some(attr::Stability { text: Some(ref s), .. }) => {
- format!("use of {} item: {}", label, *s)
- }
- _ => format!("use of {} item", label)
- };
-
- cx.span_lint(lint, e.span, msg.as_slice());
-}
+ fn get_trait_def(&self, id: ast::DefId) -> Rc<ty::TraitDef> {
+ ty::lookup_trait_def(self.tcx, id)
+ }
-fn check_enum_variant_sizes(cx: &mut Context, it: &ast::Item) {
- match it.node {
- ast::ItemEnum(..) => {
- match cx.cur.find(&(VariantSizeDifference as uint)) {
- Some(&(lvl, src)) if lvl != Allow => {
- cx.node_levels.insert((it.id, VariantSizeDifference), (lvl, src));
- },
- _ => { }
- }
- },
- _ => { }
+ fn ty_infer(&self, _span: Span) -> ty::t {
+ infer::new_infer_ctxt(self.tcx).next_ty_var()
}
}
impl<'a> Visitor<()> for Context<'a> {
fn visit_item(&mut self, it: &ast::Item, _: ()) {
self.with_lint_attrs(it.attrs.as_slice(), |cx| {
- check_enum_variant_sizes(cx, it);
- check_item_ctypes(cx, it);
- check_item_non_camel_case_types(cx, it);
- check_item_non_uppercase_statics(cx, it);
- check_heap_item(cx, it);
- check_missing_doc_item(cx, it);
- check_raw_ptr_deriving(cx, it);
+ builtin::check_enum_variant_sizes(cx, it);
+ builtin::check_item_ctypes(cx, it);
+ builtin::check_item_non_camel_case_types(cx, it);
+ builtin::check_item_non_uppercase_statics(cx, it);
+ builtin::check_heap_item(cx, it);
+ builtin::check_missing_doc_item(cx, it);
+ builtin::check_raw_ptr_deriving(cx, it);
cx.visit_ids(|v| v.visit_item(it, ()));
}
fn visit_pat(&mut self, p: &ast::Pat, _: ()) {
- check_pat_non_uppercase_statics(self, p);
- check_pat_uppercase_variable(self, p);
+ builtin::check_pat_non_uppercase_statics(self, p);
+ builtin::check_pat_uppercase_variable(self, p);
visit::walk_pat(self, p, ());
}
},
ast::ExprMatch(_, ref arms) => {
for a in arms.iter() {
- check_unused_mut_pat(self, a.pats.as_slice());
+ builtin::check_unused_mut_pat(self, a.pats.as_slice());
}
},
_ => ()
};
- check_while_true_expr(self, e);
- check_stability(self, e);
- check_unnecessary_parens_expr(self, e);
- check_unused_unsafe(self, e);
- check_unsafe_block(self, e);
- check_unnecessary_allocation(self, e);
- check_heap_expr(self, e);
+ builtin::check_while_true_expr(self, e);
+ builtin::check_stability(self, e);
+ builtin::check_unnecessary_parens_expr(self, e);
+ builtin::check_unused_unsafe(self, e);
+ builtin::check_unsafe_block(self, e);
+ builtin::check_unnecessary_allocation(self, e);
+ builtin::check_heap_expr(self, e);
- check_type_limits(self, e);
- check_unused_casts(self, e);
+ builtin::check_type_limits(self, e);
+ builtin::check_unused_casts(self, e);
visit::walk_expr(self, e, ());
}
fn visit_stmt(&mut self, s: &ast::Stmt, _: ()) {
- check_path_statement(self, s);
- check_unused_result(self, s);
- check_unnecessary_parens_stmt(self, s);
+ builtin::check_path_statement(self, s);
+ builtin::check_unused_result(self, s);
+ builtin::check_unnecessary_parens_stmt(self, s);
match s.node {
ast::StmtDecl(d, _) => {
match d.node {
ast::DeclLocal(l) => {
- check_unused_mut_pat(self, &[l.pat]);
+ builtin::check_unused_mut_pat(self, &[l.pat]);
},
_ => {}
}
};
for a in decl.inputs.iter(){
- check_unused_mut_pat(self, &[a.pat]);
+ builtin::check_unused_mut_pat(self, &[a.pat]);
}
match *fk {
visit::FkMethod(ident, _, m) => {
self.with_lint_attrs(m.attrs.as_slice(), |cx| {
- check_missing_doc_method(cx, m);
+ builtin::check_missing_doc_method(cx, m);
match method_context(cx, m) {
- PlainImpl => check_snake_case(cx, "method", ident, span),
- TraitDefaultImpl => check_snake_case(cx, "trait method", ident, span),
+ PlainImpl
+ => builtin::check_snake_case(cx, "method", ident, span),
+ TraitDefaultImpl
+ => builtin::check_snake_case(cx, "trait method", ident, span),
_ => (),
}
})
},
visit::FkItemFn(ident, _, _, _) => {
- check_snake_case(self, "function", ident, span);
+ builtin::check_snake_case(self, "function", ident, span);
recurse(self);
}
_ => recurse(self),
fn visit_ty_method(&mut self, t: &ast::TypeMethod, _: ()) {
self.with_lint_attrs(t.attrs.as_slice(), |cx| {
- check_missing_doc_ty_method(cx, t);
- check_snake_case(cx, "trait method", t.ident, t.span);
+ builtin::check_missing_doc_ty_method(cx, t);
+ builtin::check_snake_case(cx, "trait method", t.ident, t.span);
visit::walk_ty_method(cx, t, ());
})
_: &ast::Generics,
id: ast::NodeId,
_: ()) {
- check_struct_uppercase_variable(self, s);
+ builtin::check_struct_uppercase_variable(self, s);
let old_id = self.cur_struct_def_id;
self.cur_struct_def_id = id;
fn visit_struct_field(&mut self, s: &ast::StructField, _: ()) {
self.with_lint_attrs(s.node.attrs.as_slice(), |cx| {
- check_missing_doc_struct_field(cx, s);
+ builtin::check_missing_doc_struct_field(cx, s);
visit::walk_struct_field(cx, s, ());
})
fn visit_variant(&mut self, v: &ast::Variant, g: &ast::Generics, _: ()) {
self.with_lint_attrs(v.node.attrs.as_slice(), |cx| {
- check_missing_doc_variant(cx, v);
+ builtin::check_missing_doc_variant(cx, v);
visit::walk_variant(cx, v, g, ());
})
fn visit_ty(&mut self, _t: &ast::Ty, _: ()) {}
fn visit_attribute(&mut self, attr: &ast::Attribute, _: ()) {
- check_unused_attribute(self, attr);
+ builtin::check_unused_attribute(self, attr);
}
}
// since the root module isn't visited as an item (because it isn't an item), warn for it
// here.
- check_missing_doc_attrs(cx,
- None,
- krate.attrs.as_slice(),
- krate.span,
- "crate");
+ builtin::check_missing_doc_attrs(cx,
+ None,
+ krate.attrs.as_slice(),
+ krate.span,
+ "crate");
visit::walk_crate(cx, krate, ());
});
projects / rust.git / commitdiff