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https://github.com/rust-lang/rust-clippy
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Merge pull request #2735 from rust-lang-nursery/ice_melting
Check that we don't treat any type but a range type as a range
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commit
be3cba8852
6 changed files with 46 additions and 12 deletions
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@ -73,7 +73,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for ArrayIndexing {
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}
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// Index is a constant range
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if let Some(range) = higher::range(index) {
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if let Some(range) = higher::range(cx, index) {
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if let Some((start, end)) = to_const_range(cx, range, size) {
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if start > size || end > size {
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utils::span_lint(cx, OUT_OF_BOUNDS_INDEXING, e.span, "range is out of bounds");
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@ -83,7 +83,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for ArrayIndexing {
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}
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}
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if let Some(range) = higher::range(index) {
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if let Some(range) = higher::range(cx, index) {
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// Full ranges are always valid
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if range.start.is_none() && range.end.is_none() {
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return;
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@ -167,7 +167,7 @@ fn is_infinite(cx: &LateContext, expr: &Expr) -> Finiteness {
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} else {
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Finite
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},
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ExprStruct(..) => higher::range(expr)
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ExprStruct(..) => higher::range(cx, expr)
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.map_or(false, |r| r.end.is_none())
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.into(),
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_ => Finite,
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@ -888,7 +888,7 @@ fn detect_manual_memcpy<'a, 'tcx>(
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start: Some(start),
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ref end,
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limits,
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}) = higher::range(arg)
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}) = higher::range(cx, arg)
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{
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// the var must be a single name
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if let PatKind::Binding(_, canonical_id, _, _) = pat.node {
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@ -982,7 +982,7 @@ fn check_for_loop_range<'a, 'tcx>(
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start: Some(start),
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ref end,
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limits,
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}) = higher::range(arg)
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}) = higher::range(cx, arg)
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{
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// the var must be a single name
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if let PatKind::Binding(_, canonical_id, ref ident, _) = pat.node {
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@ -1118,7 +1118,7 @@ fn check_for_loop_reverse_range<'a, 'tcx>(cx: &LateContext<'a, 'tcx>, arg: &'tcx
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start: Some(start),
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end: Some(end),
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limits,
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}) = higher::range(arg)
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}) = higher::range(cx, arg)
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{
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// ...and both sides are compile-time constant integers...
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if let Some((start_idx, _)) = constant(cx, start) {
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@ -1456,7 +1456,7 @@ fn check_for_mut_range_bound(cx: &LateContext, arg: &Expr, body: &Expr) {
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start: Some(start),
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end: Some(end),
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..
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}) = higher::range(arg)
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}) = higher::range(cx, arg)
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{
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let mut_ids = vec![
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check_for_mutability(cx, start),
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@ -110,7 +110,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Pass {
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if let ExprMethodCall(ref iter_path, _, ref iter_args ) = *iter;
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if iter_path.name == "iter";
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// range expression in .zip() call: 0..x.len()
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if let Some(higher::Range { start: Some(start), end: Some(end), .. }) = higher::range(zip_arg);
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if let Some(higher::Range { start: Some(start), end: Some(end), .. }) = higher::range(cx, zip_arg);
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if is_integer_literal(start, 0);
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// .len() call
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if let ExprMethodCall(ref len_path, _, ref len_args) = end.node;
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@ -132,7 +132,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Pass {
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// exclusive range plus one: x..(y+1)
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if_chain! {
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if let Some(higher::Range { start, end: Some(end), limits: RangeLimits::HalfOpen }) = higher::range(expr);
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if let Some(higher::Range { start, end: Some(end), limits: RangeLimits::HalfOpen }) = higher::range(cx, expr);
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if let Some(y) = y_plus_one(end);
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then {
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span_lint_and_then(
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@ -153,7 +153,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Pass {
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// inclusive range minus one: x..=(y-1)
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if_chain! {
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if let Some(higher::Range { start, end: Some(end), limits: RangeLimits::Closed }) = higher::range(expr);
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if let Some(higher::Range { start, end: Some(end), limits: RangeLimits::Closed }) = higher::range(cx, expr);
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if let Some(y) = y_minus_one(end);
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then {
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span_lint_and_then(
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@ -3,7 +3,7 @@
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#![deny(missing_docs_in_private_items)]
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use rustc::hir;
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use rustc::{hir, ty};
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use rustc::lint::LateContext;
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use syntax::ast;
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use utils::{is_expn_of, match_def_path, match_qpath, opt_def_id, paths, resolve_node};
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@ -44,7 +44,36 @@ pub struct Range<'a> {
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}
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/// Higher a `hir` range to something similar to `ast::ExprKind::Range`.
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pub fn range(expr: &hir::Expr) -> Option<Range> {
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pub fn range<'a, 'b, 'tcx>(cx: &LateContext<'a, 'tcx>, expr: &'b hir::Expr) -> Option<Range<'b>> {
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let def_path = match cx.tables.expr_ty(expr).sty {
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ty::TyAdt(def, _) => cx.tcx.def_path(def.did),
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_ => return None,
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};
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// sanity checks for std::ops::RangeXXXX
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if def_path.data.len() != 3 {
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return None;
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}
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if def_path.data.get(0)?.data.as_interned_str() != "ops" {
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return None;
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}
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if def_path.data.get(1)?.data.as_interned_str() != "range" {
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return None;
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}
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let type_name = def_path.data.get(2)?.data.as_interned_str();
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let range_types = [
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"RangeFrom",
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"RangeFull",
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"RangeInclusive",
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"Range",
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"RangeTo",
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"RangeToInclusive",
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];
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if !range_types.contains(&&*type_name.as_str()) {
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return None;
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}
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/// Find the field named `name` in the field. Always return `Some` for
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/// convenience.
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fn get_field<'a>(name: &str, fields: &'a [hir::Field]) -> Option<&'a hir::Expr> {
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5
tests/run-pass/ice-2727.rs
Normal file
5
tests/run-pass/ice-2727.rs
Normal file
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@ -0,0 +1,5 @@
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pub fn f(new: fn()) {
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new();
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}
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fn main() {}
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