1712e18b77
Due to https://github.com/rust-lang/rust/pull/48995 and https://github.com/rust-lang/rust/pull/49894
81 lines
2.2 KiB
Rust
81 lines
2.2 KiB
Rust
use rustc::lint::*;
|
|
use syntax::ast::*;
|
|
use syntax::codemap::Span;
|
|
use syntax::symbol::LocalInternedString;
|
|
use utils::span_lint;
|
|
|
|
/// **What it does:** Checks for imports that remove "unsafe" from an item's
|
|
/// name.
|
|
///
|
|
/// **Why is this bad?** Renaming makes it less clear which traits and
|
|
/// structures are unsafe.
|
|
///
|
|
/// **Known problems:** None.
|
|
///
|
|
/// **Example:**
|
|
/// ```rust,ignore
|
|
/// use std::cell::{UnsafeCell as TotallySafeCell};
|
|
///
|
|
/// extern crate crossbeam;
|
|
/// use crossbeam::{spawn_unsafe as spawn};
|
|
/// ```
|
|
declare_clippy_lint! {
|
|
pub UNSAFE_REMOVED_FROM_NAME,
|
|
style,
|
|
"`unsafe` removed from API names on import"
|
|
}
|
|
|
|
pub struct UnsafeNameRemoval;
|
|
|
|
impl LintPass for UnsafeNameRemoval {
|
|
fn get_lints(&self) -> LintArray {
|
|
lint_array!(UNSAFE_REMOVED_FROM_NAME)
|
|
}
|
|
}
|
|
|
|
impl EarlyLintPass for UnsafeNameRemoval {
|
|
fn check_item(&mut self, cx: &EarlyContext, item: &Item) {
|
|
if let ItemKind::Use(ref use_tree) = item.node {
|
|
check_use_tree(use_tree, cx, &item.span);
|
|
}
|
|
}
|
|
}
|
|
|
|
fn check_use_tree(use_tree: &UseTree, cx: &EarlyContext, span: &Span) {
|
|
match use_tree.kind {
|
|
UseTreeKind::Simple(Some(new_name)) => {
|
|
let old_name = use_tree
|
|
.prefix
|
|
.segments
|
|
.last()
|
|
.expect("use paths cannot be empty")
|
|
.ident;
|
|
unsafe_to_safe_check(old_name, new_name, cx, span);
|
|
}
|
|
UseTreeKind::Simple(None) |
|
|
UseTreeKind::Glob => {},
|
|
UseTreeKind::Nested(ref nested_use_tree) => {
|
|
for &(ref use_tree, _) in nested_use_tree {
|
|
check_use_tree(use_tree, cx, span);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
fn unsafe_to_safe_check(old_name: Ident, new_name: Ident, cx: &EarlyContext, span: &Span) {
|
|
let old_str = old_name.name.as_str();
|
|
let new_str = new_name.name.as_str();
|
|
if contains_unsafe(&old_str) && !contains_unsafe(&new_str) {
|
|
span_lint(
|
|
cx,
|
|
UNSAFE_REMOVED_FROM_NAME,
|
|
*span,
|
|
&format!("removed \"unsafe\" from the name of `{}` in use as `{}`", old_str, new_str),
|
|
);
|
|
}
|
|
}
|
|
|
|
fn contains_unsafe(name: &LocalInternedString) -> bool {
|
|
name.contains("Unsafe") || name.contains("unsafe")
|
|
}
|